| //======================================================================== |
| // |
| // CairoOutputDev.cc |
| // |
| // Copyright 2003 Glyph & Cog, LLC |
| // Copyright 2004 Red Hat, Inc |
| // |
| //======================================================================== |
| |
| //======================================================================== |
| // |
| // Modified under the Poppler project - http://poppler.freedesktop.org |
| // |
| // All changes made under the Poppler project to this file are licensed |
| // under GPL version 2 or later |
| // |
| // Copyright (C) 2005-2008 Jeff Muizelaar <jeff@infidigm.net> |
| // Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com> |
| // Copyright (C) 2005, 2009, 2012, 2017-2021, 2023, 2024 Albert Astals Cid <aacid@kde.org> |
| // Copyright (C) 2005 Nickolay V. Shmyrev <nshmyrev@yandex.ru> |
| // Copyright (C) 2006-2011, 2013, 2014, 2017, 2018 Carlos Garcia Campos <carlosgc@gnome.org> |
| // Copyright (C) 2008 Carl Worth <cworth@cworth.org> |
| // Copyright (C) 2008-2018, 2021-2024 Adrian Johnson <ajohnson@redneon.com> |
| // Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu> |
| // Copyright (C) 2008, 2009 Chris Wilson <chris@chris-wilson.co.uk> |
| // Copyright (C) 2008, 2012 Hib Eris <hib@hiberis.nl> |
| // Copyright (C) 2009, 2010 David Benjamin <davidben@mit.edu> |
| // Copyright (C) 2011-2014 Thomas Freitag <Thomas.Freitag@alfa.de> |
| // Copyright (C) 2012 Patrick Pfeifer <p2000@mailinator.com> |
| // Copyright (C) 2012, 2015, 2016 Jason Crain <jason@aquaticape.us> |
| // Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp> |
| // Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich |
| // Copyright (C) 2018, 2020 Adam Reichold <adam.reichold@t-online.de> |
| // Copyright (C) 2019, 2020, 2022 Marek Kasik <mkasik@redhat.com> |
| // Copyright (C) 2020 Michal <sudolskym@gmail.com> |
| // Copyright (C) 2020, 2022 Oliver Sander <oliver.sander@tu-dresden.de> |
| // Copyright (C) 2021 Uli Schlachter <psychon@znc.in> |
| // Copyright (C) 2021 Christian Persch <chpe@src.gnome.org> |
| // Copyright (C) 2022 Zachary Travis <ztravis@everlaw.com> |
| // Copyright (C) 2023 Artemy Gordon <artemy.gordon@gmail.com> |
| // Copyright (C) 2023 Anton Thomasson <antonthomasson@gmail.com> |
| // Copyright (C) 2024 Vincent Lefevre <vincent@vinc17.net> |
| // Copyright (C) 2024 Athul Raj Kollareth <krathul3152@gmail.com> |
| // |
| // To see a description of the changes please see the Changelog file that |
| // came with your tarball or type make ChangeLog if you are building from git |
| // |
| //======================================================================== |
| |
| #include <config.h> |
| |
| #include <cstdint> |
| #include <cstring> |
| #include <cmath> |
| #include <cassert> |
| #include <cairo.h> |
| |
| #include "goo/gfile.h" |
| #include "GlobalParams.h" |
| #include "Error.h" |
| #include "Object.h" |
| #include "Gfx.h" |
| #include "GfxState.h" |
| #include "GfxFont.h" |
| #include "Page.h" |
| #include "Link.h" |
| #include "FontEncodingTables.h" |
| #include "PDFDocEncoding.h" |
| #include <fofi/FoFiTrueType.h> |
| #include <splash/SplashBitmap.h> |
| #include "CairoOutputDev.h" |
| #include "CairoFontEngine.h" |
| #include "CairoRescaleBox.h" |
| #include "UnicodeMap.h" |
| #include "UTF.h" |
| #include "JBIG2Stream.h" |
| //------------------------------------------------------------------------ |
| |
| // #define LOG_CAIRO |
| |
| // To limit memory usage and improve performance when printing, limit |
| // cairo images to this size. 8192 is sufficient for an A2 sized |
| // 300ppi image. |
| #define MAX_PRINT_IMAGE_SIZE 8192 |
| // Cairo has a max size for image surfaces due to their fixed-point |
| // coordinate handling, namely INT16_MAX, aka 32767. |
| #define MAX_CAIRO_IMAGE_SIZE 32767 |
| |
| #ifdef LOG_CAIRO |
| # define LOG(x) (x) |
| #else |
| # define LOG(x) |
| #endif |
| |
| #define MIN(a, b) (((a) < (b)) ? (a) : (b)) |
| #define MAX(a, b) (((a) > (b)) ? (a) : (b)) |
| |
| //------------------------------------------------------------------------ |
| // CairoImage |
| //------------------------------------------------------------------------ |
| |
| CairoImage::CairoImage(double x1A, double y1A, double x2A, double y2A) |
| { |
| image = nullptr; |
| x1 = x1A; |
| y1 = y1A; |
| x2 = x2A; |
| y2 = y2A; |
| } |
| |
| CairoImage::~CairoImage() |
| { |
| if (image) { |
| cairo_surface_destroy(image); |
| } |
| } |
| |
| void CairoImage::setImage(cairo_surface_t *i) |
| { |
| if (image) { |
| cairo_surface_destroy(image); |
| } |
| image = cairo_surface_reference(i); |
| } |
| |
| //------------------------------------------------------------------------ |
| // CairoOutputDev |
| //------------------------------------------------------------------------ |
| |
| // We cannot tie the lifetime of an FT_Library object to that of |
| // CairoOutputDev, since any FT_Faces created with it may end up with a |
| // reference by Cairo which can be held long after the CairoOutputDev is |
| // deleted. The simplest way to avoid problems is to never tear down the |
| // FT_Library instance; to avoid leaks, just use a single global instance |
| // initialized the first time it is needed. |
| FT_Library CairoOutputDev::ft_lib; |
| std::once_flag CairoOutputDev::ft_lib_once_flag; |
| |
| CairoOutputDev::CairoOutputDev() |
| { |
| doc = nullptr; |
| |
| std::call_once(ft_lib_once_flag, FT_Init_FreeType, &ft_lib); |
| |
| fontEngine = nullptr; |
| fontEngine_owner = false; |
| glyphs = nullptr; |
| fill_pattern = nullptr; |
| fill_color = {}; |
| stroke_pattern = nullptr; |
| stroke_color = {}; |
| stroke_opacity = 1.0; |
| fill_opacity = 1.0; |
| textClipPath = nullptr; |
| strokePathClip = nullptr; |
| cairo = nullptr; |
| currentFont = nullptr; |
| printing = true; |
| use_show_text_glyphs = false; |
| inUncoloredPattern = false; |
| t3_render_state = Type3RenderNone; |
| t3_glyph_has_bbox = false; |
| t3_glyph_has_color = false; |
| text_matrix_valid = true; |
| |
| groupColorSpaceStack = nullptr; |
| group = nullptr; |
| mask = nullptr; |
| shape = nullptr; |
| cairo_shape = nullptr; |
| knockoutCount = 0; |
| |
| textPage = nullptr; |
| actualText = nullptr; |
| logicalStruct = false; |
| pdfPageNum = 0; |
| cairoPageNum = 0; |
| |
| // the SA parameter supposedly defaults to false, but Acrobat |
| // apparently hardwires it to true |
| stroke_adjust = true; |
| align_stroke_coords = false; |
| adjusted_stroke_width = false; |
| xref = nullptr; |
| currentStructParents = -1; |
| } |
| |
| CairoOutputDev::~CairoOutputDev() |
| { |
| if (fontEngine_owner && fontEngine) { |
| delete fontEngine; |
| } |
| if (textClipPath) { |
| cairo_path_destroy(textClipPath); |
| textClipPath = nullptr; |
| } |
| |
| if (cairo) { |
| cairo_destroy(cairo); |
| } |
| cairo_pattern_destroy(stroke_pattern); |
| cairo_pattern_destroy(fill_pattern); |
| if (group) { |
| cairo_pattern_destroy(group); |
| } |
| if (mask) { |
| cairo_pattern_destroy(mask); |
| } |
| if (shape) { |
| cairo_pattern_destroy(shape); |
| } |
| if (textPage) { |
| textPage->decRefCnt(); |
| } |
| if (actualText) { |
| delete actualText; |
| } |
| } |
| |
| void CairoOutputDev::setCairo(cairo_t *c) |
| { |
| if (cairo != nullptr) { |
| cairo_status_t status = cairo_status(cairo); |
| if (status) { |
| error(errInternal, -1, "cairo context error: {0:s}", cairo_status_to_string(status)); |
| } |
| cairo_destroy(cairo); |
| assert(!cairo_shape); |
| } |
| if (c != nullptr) { |
| cairo = cairo_reference(c); |
| /* save the initial matrix so that we can use it for type3 fonts. */ |
| // XXX: is this sufficient? could we miss changes to the matrix somehow? |
| cairo_get_matrix(cairo, &orig_matrix); |
| } else { |
| cairo = nullptr; |
| cairo_shape = nullptr; |
| } |
| } |
| |
| bool CairoOutputDev::isPDF() |
| { |
| if (cairo) { |
| return cairo_surface_get_type(cairo_get_target(cairo)) == CAIRO_SURFACE_TYPE_PDF; |
| } |
| return false; |
| } |
| |
| void CairoOutputDev::setTextPage(TextPage *text) |
| { |
| if (textPage) { |
| textPage->decRefCnt(); |
| } |
| if (actualText) { |
| delete actualText; |
| } |
| if (text) { |
| textPage = text; |
| textPage->incRefCnt(); |
| actualText = new ActualText(text); |
| } else { |
| textPage = nullptr; |
| actualText = nullptr; |
| } |
| } |
| |
| void CairoOutputDev::copyAntialias(cairo_t *cr, cairo_t *source_cr) |
| { |
| cairo_set_antialias(cr, cairo_get_antialias(source_cr)); |
| |
| cairo_font_options_t *font_options = cairo_font_options_create(); |
| cairo_get_font_options(source_cr, font_options); |
| cairo_set_font_options(cr, font_options); |
| cairo_font_options_destroy(font_options); |
| } |
| |
| void CairoOutputDev::startDoc(PDFDoc *docA, CairoFontEngine *parentFontEngine) |
| { |
| doc = docA; |
| if (parentFontEngine) { |
| fontEngine = parentFontEngine; |
| } else { |
| if (fontEngine) { |
| delete fontEngine; |
| } |
| fontEngine = new CairoFontEngine(ft_lib); |
| fontEngine_owner = true; |
| } |
| xref = doc->getXRef(); |
| |
| mcidEmitted.clear(); |
| destsMap.clear(); |
| emittedDestinations.clear(); |
| pdfPageToCairoPageMap.clear(); |
| pdfPageRefToCairoPageNumMap.clear(); |
| cairoPageNum = 0; |
| firstPage = true; |
| } |
| |
| void CairoOutputDev::textStringToQuotedUtf8(const GooString *text, GooString *s) |
| { |
| std::string utf8 = TextStringToUtf8(text->toStr()); |
| s->Set("'"); |
| for (char c : utf8) { |
| if (c == '\\' || c == '\'') { |
| s->append("\\"); |
| } |
| s->append(c); |
| } |
| s->append("'"); |
| } |
| |
| // Initialization that needs to be performed after setCairo() is called. |
| void CairoOutputDev::startFirstPage(int pageNum, GfxState *state, XRef *xrefA) |
| { |
| if (xrefA) { |
| xref = xrefA; |
| } |
| |
| if (logicalStruct && isPDF()) { |
| int numDests = doc->getCatalog()->numDestNameTree(); |
| for (int i = 0; i < numDests; i++) { |
| const GooString *name = doc->getCatalog()->getDestNameTreeName(i); |
| std::unique_ptr<LinkDest> dest = doc->getCatalog()->getDestNameTreeDest(i); |
| if (dest->isPageRef()) { |
| Ref ref = dest->getPageRef(); |
| destsMap[ref].insert({ std::string(name->toStr()), std::move(dest) }); |
| } |
| } |
| |
| numDests = doc->getCatalog()->numDests(); |
| for (int i = 0; i < numDests; i++) { |
| const char *name = doc->getCatalog()->getDestsName(i); |
| std::unique_ptr<LinkDest> dest = doc->getCatalog()->getDestsDest(i); |
| if (dest->isPageRef()) { |
| Ref ref = dest->getPageRef(); |
| destsMap[ref].insert({ std::string(name), std::move(dest) }); |
| } |
| } |
| } |
| } |
| |
| void CairoOutputDev::startPage(int pageNum, GfxState *state, XRef *xrefA) |
| { |
| if (firstPage) { |
| startFirstPage(pageNum, state, xrefA); |
| firstPage = false; |
| } |
| |
| /* set up some per page defaults */ |
| cairo_pattern_destroy(fill_pattern); |
| cairo_pattern_destroy(stroke_pattern); |
| |
| fill_pattern = cairo_pattern_create_rgb(0., 0., 0.); |
| fill_color = { 0, 0, 0 }; |
| stroke_pattern = cairo_pattern_reference(fill_pattern); |
| stroke_color = { 0, 0, 0 }; |
| |
| if (textPage) { |
| textPage->startPage(state); |
| } |
| |
| pdfPageNum = pageNum; |
| cairoPageNum++; |
| pdfPageToCairoPageMap[pdfPageNum] = cairoPageNum; |
| |
| if (logicalStruct && isPDF()) { |
| Object obj = doc->getPage(pageNum)->getAnnotsObject(xref); |
| Annots *annots = new Annots(doc, pageNum, &obj); |
| |
| for (Annot *annot : annots->getAnnots()) { |
| if (annot->getType() == Annot::typeLink) { |
| annot->incRefCnt(); |
| annotations.push_back(annot); |
| } |
| } |
| |
| delete annots; |
| |
| // emit dests |
| Ref *ref = doc->getCatalog()->getPageRef(pageNum); |
| pdfPageRefToCairoPageNumMap[*ref] = cairoPageNum; |
| auto pageDests = destsMap.find(*ref); |
| if (pageDests != destsMap.end()) { |
| for (auto &it : pageDests->second) { |
| GooString quoted_name; |
| GooString name(it.first); |
| textStringToQuotedUtf8(&name, "ed_name); |
| emittedDestinations.insert(quoted_name.toStr()); |
| |
| GooString attrib; |
| attrib.appendf("name={0:t} ", "ed_name); |
| if (it.second->getChangeLeft()) { |
| attrib.appendf("x={0:g} ", it.second->getLeft()); |
| } |
| if (it.second->getChangeTop()) { |
| attrib.appendf("y={0:g} ", state->getPageHeight() - it.second->getTop()); |
| } |
| |
| #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 18, 0) |
| cairo_tag_begin(cairo, CAIRO_TAG_DEST, attrib.c_str()); |
| cairo_tag_end(cairo, CAIRO_TAG_DEST); |
| #endif |
| } |
| } |
| |
| currentStructParents = doc->getPage(pageNum)->getStructParents(); |
| } |
| } |
| |
| void CairoOutputDev::endPage() |
| { |
| if (textPage) { |
| textPage->endPage(); |
| textPage->coalesce(true, 0, false); |
| } |
| } |
| |
| void CairoOutputDev::beginForm(Object *obj, Ref id) |
| { |
| if (logicalStruct && isPDF()) { |
| structParentsStack.push_back(currentStructParents); |
| |
| const Object tmp = obj->streamGetDict()->lookup("StructParents"); |
| if (!(tmp.isInt() || tmp.isNull())) { |
| error(errSyntaxError, -1, "XObject StructParents object is wrong type ({0:s})", tmp.getTypeName()); |
| } else if (tmp.isInt()) { |
| currentStructParents = tmp.getInt(); |
| } |
| } |
| } |
| |
| void CairoOutputDev::endForm(Object *obj, Ref id) |
| { |
| if (logicalStruct && isPDF()) { |
| currentStructParents = structParentsStack.back(); |
| structParentsStack.pop_back(); |
| } |
| } |
| |
| void CairoOutputDev::quadToCairoRect(AnnotQuadrilaterals *quads, int idx, double pageHeight, cairo_rectangle_t *rect) |
| { |
| double x1, x2, y1, y2; |
| x1 = x2 = quads->getX1(idx); |
| y1 = y2 = quads->getX2(idx); |
| |
| x1 = std::min(x1, quads->getX2(idx)); |
| x1 = std::min(x1, quads->getX3(idx)); |
| x1 = std::min(x1, quads->getX4(idx)); |
| |
| y1 = std::min(y1, quads->getY2(idx)); |
| y1 = std::min(y1, quads->getY3(idx)); |
| y1 = std::min(y1, quads->getY4(idx)); |
| |
| x2 = std::max(x2, quads->getX2(idx)); |
| x2 = std::max(x2, quads->getX3(idx)); |
| x2 = std::max(x2, quads->getX4(idx)); |
| |
| y2 = std::max(y2, quads->getY2(idx)); |
| y2 = std::max(y2, quads->getY3(idx)); |
| y2 = std::max(y2, quads->getY4(idx)); |
| |
| rect->x = x1; |
| rect->y = pageHeight - y2; |
| rect->width = x2 - x1; |
| rect->height = y2 - y1; |
| } |
| |
| bool CairoOutputDev::appendLinkDestRef(GooString *s, const LinkDest *dest) |
| { |
| Ref ref = dest->getPageRef(); |
| auto pageNum = pdfPageRefToCairoPageNumMap.find(ref); |
| if (pageNum != pdfPageRefToCairoPageNumMap.end()) { |
| auto cairoPage = pdfPageToCairoPageMap.find(pageNum->second); |
| if (cairoPage != pdfPageToCairoPageMap.end()) { |
| s->appendf("page={0:d} ", cairoPage->second); |
| double destPageHeight = doc->getPageMediaHeight(dest->getPageNum()); |
| appendLinkDestXY(s, dest, destPageHeight); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void CairoOutputDev::appendLinkDestXY(GooString *s, const LinkDest *dest, double destPageHeight) |
| { |
| double x = 0; |
| double y = 0; |
| |
| if (dest->getChangeLeft()) { |
| x = dest->getLeft(); |
| } |
| |
| if (dest->getChangeTop()) { |
| y = dest->getTop(); |
| } |
| |
| // if pageHeight is 0, dest is remote document, cairo uses PDF coords in this |
| // case. So don't flip coords when pageHeight is 0. |
| s->appendf("pos=[{0:g} {1:g}] ", x, destPageHeight ? destPageHeight - y : y); |
| } |
| |
| bool CairoOutputDev::beginLinkTag(AnnotLink *annotLink) |
| { |
| int page_num = annotLink->getPageNum(); |
| double height = doc->getPageMediaHeight(page_num); |
| |
| GooString attrib; |
| attrib.appendf("link_page={0:d} ", page_num); |
| attrib.append("rect=["); |
| AnnotQuadrilaterals *quads = annotLink->getQuadrilaterals(); |
| if (quads && quads->getQuadrilateralsLength() > 0) { |
| for (int i = 0; i < quads->getQuadrilateralsLength(); i++) { |
| cairo_rectangle_t rect; |
| quadToCairoRect(quads, i, height, &rect); |
| attrib.appendf("{0:g} {1:g} {2:g} {3:g} ", rect.x, rect.y, rect.width, rect.height); |
| } |
| } else { |
| double x1, x2, y1, y2; |
| annotLink->getRect(&x1, &y1, &x2, &y2); |
| attrib.appendf("{0:g} {1:g} {2:g} {3:g} ", x1, height - y2, x2 - x1, y2 - y1); |
| } |
| attrib.append("] "); |
| |
| LinkAction *action = annotLink->getAction(); |
| if (action->getKind() == actionGoTo) { |
| LinkGoTo *act = static_cast<LinkGoTo *>(action); |
| if (act->isOk()) { |
| const GooString *namedDest = act->getNamedDest(); |
| const LinkDest *linkDest = act->getDest(); |
| if (namedDest) { |
| GooString name; |
| textStringToQuotedUtf8(namedDest, &name); |
| if (emittedDestinations.count(name.toStr()) == 0) { |
| return false; |
| } |
| attrib.appendf("dest={0:t} ", &name); |
| } else if (linkDest && linkDest->isOk() && linkDest->isPageRef()) { |
| bool ok = appendLinkDestRef(&attrib, linkDest); |
| if (!ok) { |
| return false; |
| } |
| } |
| } |
| } else if (action->getKind() == actionGoToR) { |
| LinkGoToR *act = static_cast<LinkGoToR *>(action); |
| attrib.appendf("file='{0:t}' ", act->getFileName()); |
| const GooString *namedDest = act->getNamedDest(); |
| const LinkDest *linkDest = act->getDest(); |
| if (namedDest) { |
| GooString name; |
| textStringToQuotedUtf8(namedDest, &name); |
| if (emittedDestinations.count(name.toStr()) == 0) { |
| return false; |
| } |
| attrib.appendf("dest={0:t} ", &name); |
| } else if (linkDest && linkDest->isOk() && !linkDest->isPageRef()) { |
| auto cairoPage = pdfPageToCairoPageMap.find(linkDest->getPageNum()); |
| if (cairoPage != pdfPageToCairoPageMap.end()) { |
| attrib.appendf("page={0:d} ", cairoPage->second); |
| appendLinkDestXY(&attrib, linkDest, 0.0); |
| } else { |
| return false; |
| } |
| } |
| } else if (action->getKind() == actionURI) { |
| LinkURI *act = static_cast<LinkURI *>(action); |
| if (act->isOk()) { |
| attrib.appendf("uri='{0:s}'", act->getURI().c_str()); |
| } |
| } |
| #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 18, 0) |
| cairo_tag_begin(cairo, CAIRO_TAG_LINK, attrib.c_str()); |
| #endif |
| return true; |
| } |
| |
| AnnotLink *CairoOutputDev::findLinkObject(const StructElement *elem) |
| { |
| if (elem->isObjectRef()) { |
| Ref ref = elem->getObjectRef(); |
| for (Annot *annot : annotations) { |
| if (annot->getType() == Annot::typeLink && annot->match(&ref)) { |
| return static_cast<AnnotLink *>(annot); |
| } |
| } |
| } |
| |
| for (unsigned i = 0; i < elem->getNumChildren(); i++) { |
| AnnotLink *link = findLinkObject(elem->getChild(i)); |
| if (link) { |
| return link; |
| } |
| } |
| |
| return nullptr; |
| } |
| |
| bool CairoOutputDev::beginLink(const StructElement *linkElem) |
| { |
| bool emitted = true; |
| AnnotLink *linkAnnot = findLinkObject(linkElem); |
| if (linkAnnot) { |
| emitted = beginLinkTag(linkAnnot); |
| } else { |
| #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 18, 0) |
| cairo_tag_begin(cairo, linkElem->getTypeName(), nullptr); |
| #endif |
| } |
| return emitted; |
| } |
| |
| void CairoOutputDev::getStructElemAttributeString(const StructElement *elem) |
| { |
| int mcid = 0; |
| GooString attribs; |
| Ref ref = elem->getObjectRef(); |
| attribs.appendf("id='{0:d}_{1:d}_{2:d}'", ref.num, ref.gen, mcid); |
| attribs.appendf(" parent='{0:d}_{1:d}'", ref.num, ref.gen); |
| } |
| |
| int CairoOutputDev::getContentElementStructParents(const StructElement *element) |
| { |
| int structParents = -1; |
| Ref ref; |
| |
| if (element->hasStmRef()) { |
| element->getStmRef(ref); |
| Object xobjectObj = xref->fetch(ref); |
| const Object &spObj = xobjectObj.streamGetDict()->lookup("StructParents"); |
| if (spObj.isInt()) { |
| structParents = spObj.getInt(); |
| } |
| } else if (element->hasPageRef()) { |
| element->getPageRef(ref); |
| Object pageObj = xref->fetch(ref); |
| const Object &spObj = pageObj.dictLookup("StructParents"); |
| if (spObj.isInt()) { |
| structParents = spObj.getInt(); |
| } |
| } |
| |
| if (structParents == -1) { |
| error(errSyntaxError, -1, "Unable to find StructParents object for StructElement"); |
| } |
| return structParents; |
| } |
| |
| bool CairoOutputDev::checkIfStructElementNeeded(const StructElement *element) |
| { |
| if (element->isContent() && !element->isObjectRef()) { |
| int structParents = getContentElementStructParents(element); |
| int mcid = element->getMCID(); |
| if (mcidEmitted.count(std::pair(structParents, mcid)) > 0) { |
| structElementNeeded.insert(element); |
| return true; |
| } |
| } else if (!element->isContent()) { |
| bool needed = false; |
| for (unsigned i = 0; i < element->getNumChildren(); i++) { |
| if (checkIfStructElementNeeded(element->getChild(i))) { |
| needed = true; |
| } |
| } |
| if (needed) { |
| structElementNeeded.insert(element); |
| } |
| return needed; |
| } |
| return false; |
| } |
| |
| void CairoOutputDev::emitStructElement(const StructElement *element) |
| { |
| if (structElementNeeded.count(element) == 0) { |
| return; |
| } |
| |
| #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 18, 0) |
| if (element->isContent() && !element->isObjectRef()) { |
| int structParents = getContentElementStructParents(element); |
| int mcid = element->getMCID(); |
| GooString attribs; |
| attribs.appendf("ref='{0:d}_{1:d}'", structParents, mcid); |
| cairo_tag_begin(cairo, CAIRO_TAG_CONTENT_REF, attribs.c_str()); |
| cairo_tag_end(cairo, CAIRO_TAG_CONTENT_REF); |
| } else if (!element->isContent()) { |
| if (element->getType() == StructElement::Link) { |
| bool ok = beginLink(element); |
| if (!ok) { |
| return; |
| } |
| } else { |
| cairo_tag_begin(cairo, element->getTypeName(), ""); |
| } |
| for (unsigned i = 0; i < element->getNumChildren(); i++) { |
| emitStructElement(element->getChild(i)); |
| } |
| cairo_tag_end(cairo, element->getTypeName()); |
| } |
| #endif |
| } |
| |
| void CairoOutputDev::emitStructTree() |
| { |
| if (logicalStruct && isPDF()) { |
| const StructTreeRoot *root = doc->getStructTreeRoot(); |
| if (!root) { |
| return; |
| } |
| |
| for (unsigned i = 0; i < root->getNumChildren(); i++) { |
| checkIfStructElementNeeded(root->getChild(i)); |
| } |
| |
| for (unsigned i = 0; i < root->getNumChildren(); i++) { |
| emitStructElement(root->getChild(i)); |
| } |
| } |
| } |
| |
| void CairoOutputDev::startType3Render(GfxState *state, XRef *xrefA) |
| { |
| /* When cairo calls a user font render function, the default |
| * source set on the provided cairo_t must be used, except in the |
| * case of a color user font explicitly setting a color. |
| * |
| * As startPage() resets the source to solid black, this function |
| * is used instead to initialise the CairoOutputDev when rendering |
| * a user font glyph. |
| * |
| * As noted in the Cairo documentation, the default source of a |
| * render callback contains an internal marker denoting the |
| * foreground color is to be used when the glyph is rendered, even |
| * though querying the default source will reveal solid black. |
| * For this reason, fill_color and stroke_color are set to nullopt |
| * to ensure updateFillColor()/updateStrokeColor() will update the |
| * color even if the new color is black. |
| * |
| * The saveState()/restoreState() functions also ensure the |
| * default source is saved and restored, and the fill_color and |
| * stroke_color is reset to nullopt for the same reason. |
| */ |
| |
| /* Initialise fill and stroke pattern to the current source pattern */ |
| fill_pattern = cairo_pattern_reference(cairo_get_source(cairo)); |
| stroke_pattern = cairo_pattern_reference(cairo_get_source(cairo)); |
| fill_color = {}; |
| stroke_color = {}; |
| t3_glyph_has_bbox = false; |
| t3_glyph_has_color = false; |
| |
| if (xrefA != nullptr) { |
| xref = xrefA; |
| } |
| } |
| |
| void CairoOutputDev::saveState(GfxState *state) |
| { |
| LOG(printf("save\n")); |
| cairo_save(cairo); |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| } |
| |
| /* To ensure the current source, potentially containing the hidden |
| * foreground color maker, is saved and restored as required by |
| * _render_type3_glyph, we avoid using the update color and |
| * opacity functions in restoreState() and instead be careful to |
| * save all the color related variables that have been set by the |
| * update functions on the stack. */ |
| SaveStateElement elem; |
| elem.fill_pattern = cairo_pattern_reference(fill_pattern); |
| elem.fill_opacity = fill_opacity; |
| elem.stroke_pattern = cairo_pattern_reference(stroke_pattern); |
| elem.stroke_opacity = stroke_opacity; |
| elem.mask = mask ? cairo_pattern_reference(mask) : nullptr; |
| elem.mask_matrix = mask_matrix; |
| elem.fontRef = currentFont ? currentFont->getRef() : Ref::INVALID(); |
| saveStateStack.push_back(elem); |
| |
| if (strokePathClip) { |
| strokePathClip->ref_count++; |
| } |
| } |
| |
| void CairoOutputDev::restoreState(GfxState *state) |
| { |
| LOG(printf("restore\n")); |
| cairo_restore(cairo); |
| if (cairo_shape) { |
| cairo_restore(cairo_shape); |
| } |
| |
| text_matrix_valid = true; |
| |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = saveStateStack.back().fill_pattern; |
| fill_color = {}; |
| fill_opacity = saveStateStack.back().fill_opacity; |
| |
| cairo_pattern_destroy(stroke_pattern); |
| stroke_pattern = saveStateStack.back().stroke_pattern; |
| stroke_color = {}; |
| stroke_opacity = saveStateStack.back().stroke_opacity; |
| |
| if (saveStateStack.back().fontRef != (currentFont ? currentFont->getRef() : Ref::INVALID())) { |
| needFontUpdate = true; |
| } |
| |
| /* This isn't restored by cairo_restore() since we keep it in the |
| * output device. */ |
| updateBlendMode(state); |
| |
| if (mask) { |
| cairo_pattern_destroy(mask); |
| } |
| mask = saveStateStack.back().mask; |
| mask_matrix = saveStateStack.back().mask_matrix; |
| saveStateStack.pop_back(); |
| |
| if (strokePathClip && --strokePathClip->ref_count == 0) { |
| delete strokePathClip->path; |
| if (strokePathClip->dashes) { |
| gfree(strokePathClip->dashes); |
| } |
| gfree(strokePathClip); |
| strokePathClip = nullptr; |
| } |
| } |
| |
| void CairoOutputDev::updateAll(GfxState *state) |
| { |
| updateLineDash(state); |
| updateLineJoin(state); |
| updateLineCap(state); |
| updateLineWidth(state); |
| updateFlatness(state); |
| updateMiterLimit(state); |
| updateFillColor(state); |
| updateStrokeColor(state); |
| updateFillOpacity(state); |
| updateStrokeOpacity(state); |
| updateBlendMode(state); |
| needFontUpdate = true; |
| if (textPage) { |
| textPage->updateFont(state); |
| } |
| } |
| |
| void CairoOutputDev::setDefaultCTM(const double *ctm) |
| { |
| cairo_matrix_t matrix; |
| matrix.xx = ctm[0]; |
| matrix.yx = ctm[1]; |
| matrix.xy = ctm[2]; |
| matrix.yy = ctm[3]; |
| matrix.x0 = ctm[4]; |
| matrix.y0 = ctm[5]; |
| |
| cairo_transform(cairo, &matrix); |
| if (cairo_shape) { |
| cairo_transform(cairo_shape, &matrix); |
| } |
| |
| OutputDev::setDefaultCTM(ctm); |
| } |
| |
| void CairoOutputDev::updateCTM(GfxState *state, double m11, double m12, double m21, double m22, double m31, double m32) |
| { |
| cairo_matrix_t matrix, invert_matrix; |
| matrix.xx = m11; |
| matrix.yx = m12; |
| matrix.xy = m21; |
| matrix.yy = m22; |
| matrix.x0 = m31; |
| matrix.y0 = m32; |
| |
| /* Make sure the matrix is invertible before setting it. |
| * cairo will blow up if we give it a matrix that's not |
| * invertible, so we need to check before passing it |
| * to cairo_transform. Ignoring it is likely to give better |
| * results than not rendering anything at all. See #14398 |
| * |
| * Ideally, we could do the cairo_transform |
| * and then check if anything went wrong and fix it then |
| * instead of having to invert the matrix. */ |
| invert_matrix = matrix; |
| if (cairo_matrix_invert(&invert_matrix)) { |
| error(errSyntaxWarning, -1, "matrix not invertible"); |
| return; |
| } |
| |
| cairo_transform(cairo, &matrix); |
| if (cairo_shape) { |
| cairo_transform(cairo_shape, &matrix); |
| } |
| updateLineDash(state); |
| updateLineJoin(state); |
| updateLineCap(state); |
| updateLineWidth(state); |
| } |
| |
| void CairoOutputDev::updateLineDash(GfxState *state) |
| { |
| double dashStart; |
| |
| const std::vector<double> &dashPattern = state->getLineDash(&dashStart); |
| cairo_set_dash(cairo, dashPattern.data(), dashPattern.size(), dashStart); |
| if (cairo_shape) { |
| cairo_set_dash(cairo_shape, dashPattern.data(), dashPattern.size(), dashStart); |
| } |
| } |
| |
| void CairoOutputDev::updateFlatness(GfxState *state) |
| { |
| // cairo_set_tolerance (cairo, state->getFlatness()); |
| } |
| |
| void CairoOutputDev::updateLineJoin(GfxState *state) |
| { |
| switch (state->getLineJoin()) { |
| case GfxState::LineJoinMitre: |
| cairo_set_line_join(cairo, CAIRO_LINE_JOIN_MITER); |
| break; |
| case GfxState::LineJoinRound: |
| cairo_set_line_join(cairo, CAIRO_LINE_JOIN_ROUND); |
| break; |
| case GfxState::LineJoinBevel: |
| cairo_set_line_join(cairo, CAIRO_LINE_JOIN_BEVEL); |
| break; |
| } |
| if (cairo_shape) { |
| cairo_set_line_join(cairo_shape, cairo_get_line_join(cairo)); |
| } |
| } |
| |
| void CairoOutputDev::updateLineCap(GfxState *state) |
| { |
| switch (state->getLineCap()) { |
| case GfxState::LineCapButt: |
| cairo_set_line_cap(cairo, CAIRO_LINE_CAP_BUTT); |
| break; |
| case GfxState::LineCapRound: |
| cairo_set_line_cap(cairo, CAIRO_LINE_CAP_ROUND); |
| break; |
| case GfxState::LineCapProjecting: |
| cairo_set_line_cap(cairo, CAIRO_LINE_CAP_SQUARE); |
| break; |
| } |
| if (cairo_shape) { |
| cairo_set_line_cap(cairo_shape, cairo_get_line_cap(cairo)); |
| } |
| } |
| |
| void CairoOutputDev::updateMiterLimit(GfxState *state) |
| { |
| cairo_set_miter_limit(cairo, state->getMiterLimit()); |
| if (cairo_shape) { |
| cairo_set_miter_limit(cairo_shape, state->getMiterLimit()); |
| } |
| } |
| |
| void CairoOutputDev::updateLineWidth(GfxState *state) |
| { |
| LOG(printf("line width: %f\n", state->getLineWidth())); |
| adjusted_stroke_width = false; |
| double width = state->getLineWidth(); |
| if (stroke_adjust && !printing) { |
| double x, y; |
| x = y = width; |
| |
| /* find out line width in device units */ |
| cairo_user_to_device_distance(cairo, &x, &y); |
| if (fabs(x) <= 1.0 && fabs(y) <= 1.0) { |
| /* adjust width to at least one device pixel */ |
| x = y = 1.0; |
| cairo_device_to_user_distance(cairo, &x, &y); |
| width = MIN(fabs(x), fabs(y)); |
| adjusted_stroke_width = true; |
| } |
| } else if (width == 0.0) { |
| /* Cairo does not support 0 line width == 1 device pixel. Find out |
| * how big pixels (device unit) are in the x and y |
| * directions. Choose the smaller of the two as our line width. |
| */ |
| double x = 1.0, y = 1.0; |
| if (printing) { |
| // assume printer pixel size is 1/600 inch |
| x = 72.0 / 600; |
| y = 72.0 / 600; |
| } |
| cairo_device_to_user_distance(cairo, &x, &y); |
| width = MIN(fabs(x), fabs(y)); |
| } |
| cairo_set_line_width(cairo, width); |
| if (cairo_shape) { |
| cairo_set_line_width(cairo_shape, cairo_get_line_width(cairo)); |
| } |
| } |
| |
| void CairoOutputDev::updateFillColor(GfxState *state) |
| { |
| if (inUncoloredPattern) { |
| return; |
| } |
| |
| GfxRGB new_color; |
| state->getFillRGB(&new_color); |
| bool color_match = fill_color && *fill_color == new_color; |
| if (cairo_pattern_get_type(fill_pattern) != CAIRO_PATTERN_TYPE_SOLID || !color_match) { |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = cairo_pattern_create_rgba(colToDbl(new_color.r), colToDbl(new_color.g), colToDbl(new_color.b), fill_opacity); |
| fill_color = new_color; |
| LOG(printf("fill color: %d %d %d\n", fill_color->r, fill_color->g, fill_color->b)); |
| } |
| } |
| |
| void CairoOutputDev::updateStrokeColor(GfxState *state) |
| { |
| |
| if (inUncoloredPattern) { |
| return; |
| } |
| |
| GfxRGB new_color; |
| state->getStrokeRGB(&new_color); |
| bool color_match = stroke_color && *stroke_color == new_color; |
| if (cairo_pattern_get_type(fill_pattern) != CAIRO_PATTERN_TYPE_SOLID || !color_match) { |
| cairo_pattern_destroy(stroke_pattern); |
| stroke_pattern = cairo_pattern_create_rgba(colToDbl(new_color.r), colToDbl(new_color.g), colToDbl(new_color.b), stroke_opacity); |
| stroke_color = new_color; |
| LOG(printf("stroke color: %d %d %d\n", stroke_color->r, stroke_color->g, stroke_color->b)); |
| } |
| } |
| |
| void CairoOutputDev::updateFillOpacity(GfxState *state) |
| { |
| double opacity = fill_opacity; |
| |
| if (inUncoloredPattern) { |
| return; |
| } |
| |
| fill_opacity = state->getFillOpacity(); |
| if (opacity != fill_opacity) { |
| if (!fill_color) { |
| GfxRGB color; |
| state->getFillRGB(&color); |
| fill_color = color; |
| } |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = cairo_pattern_create_rgba(colToDbl(fill_color->r), colToDbl(fill_color->g), colToDbl(fill_color->b), fill_opacity); |
| |
| LOG(printf("fill opacity: %f\n", fill_opacity)); |
| } |
| } |
| |
| void CairoOutputDev::updateStrokeOpacity(GfxState *state) |
| { |
| double opacity = stroke_opacity; |
| |
| if (inUncoloredPattern) { |
| return; |
| } |
| |
| stroke_opacity = state->getStrokeOpacity(); |
| if (opacity != stroke_opacity) { |
| if (!stroke_color) { |
| GfxRGB color; |
| state->getStrokeRGB(&color); |
| stroke_color = color; |
| } |
| cairo_pattern_destroy(stroke_pattern); |
| stroke_pattern = cairo_pattern_create_rgba(colToDbl(stroke_color->r), colToDbl(stroke_color->g), colToDbl(stroke_color->b), stroke_opacity); |
| |
| LOG(printf("stroke opacity: %f\n", stroke_opacity)); |
| } |
| } |
| |
| void CairoOutputDev::updateFillColorStop(GfxState *state, double offset) |
| { |
| if (inUncoloredPattern) { |
| return; |
| } |
| |
| GfxRGB color; |
| state->getFillRGB(&color); |
| |
| // If stroke pattern is set then the current fill is clipped |
| // to a stroke path. In that case, the stroke opacity has to be used |
| // rather than the fill opacity. |
| // See https://gitlab.freedesktop.org/poppler/poppler/issues/178 |
| auto opacity = (state->getStrokePattern()) ? state->getStrokeOpacity() : state->getFillOpacity(); |
| |
| cairo_pattern_add_color_stop_rgba(fill_pattern, offset, colToDbl(color.r), colToDbl(color.g), colToDbl(color.b), opacity); |
| LOG(printf("fill color stop: %f (%d, %d, %d, %d)\n", offset, color.r, color.g, color.b, dblToCol(opacity))); |
| } |
| |
| void CairoOutputDev::updateBlendMode(GfxState *state) |
| { |
| switch (state->getBlendMode()) { |
| default: |
| case gfxBlendNormal: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_OVER); |
| break; |
| case gfxBlendMultiply: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_MULTIPLY); |
| break; |
| case gfxBlendScreen: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_SCREEN); |
| break; |
| case gfxBlendOverlay: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_OVERLAY); |
| break; |
| case gfxBlendDarken: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_DARKEN); |
| break; |
| case gfxBlendLighten: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_LIGHTEN); |
| break; |
| case gfxBlendColorDodge: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_COLOR_DODGE); |
| break; |
| case gfxBlendColorBurn: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_COLOR_BURN); |
| break; |
| case gfxBlendHardLight: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_HARD_LIGHT); |
| break; |
| case gfxBlendSoftLight: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_SOFT_LIGHT); |
| break; |
| case gfxBlendDifference: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_DIFFERENCE); |
| break; |
| case gfxBlendExclusion: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_EXCLUSION); |
| break; |
| case gfxBlendHue: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_HSL_HUE); |
| break; |
| case gfxBlendSaturation: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_HSL_SATURATION); |
| break; |
| case gfxBlendColor: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_HSL_COLOR); |
| break; |
| case gfxBlendLuminosity: |
| cairo_set_operator(cairo, CAIRO_OPERATOR_HSL_LUMINOSITY); |
| break; |
| } |
| LOG(printf("blend mode: %d\n", (int)state->getBlendMode())); |
| } |
| |
| void CairoOutputDev::updateFont(GfxState *state) |
| { |
| cairo_font_face_t *font_face; |
| cairo_matrix_t matrix, invert_matrix; |
| |
| LOG(printf("updateFont() font=%s\n", state->getFont()->getName()->c_str())); |
| |
| needFontUpdate = false; |
| |
| // FIXME: use cairo font engine? |
| if (textPage) { |
| textPage->updateFont(state); |
| } |
| |
| currentFont = fontEngine->getFont(state->getFont(), doc, printing, xref); |
| |
| if (!currentFont) { |
| return; |
| } |
| |
| font_face = currentFont->getFontFace(); |
| cairo_set_font_face(cairo, font_face); |
| |
| use_show_text_glyphs = state->getFont()->hasToUnicodeCMap() && cairo_surface_has_show_text_glyphs(cairo_get_target(cairo)); |
| |
| double fontSize = state->getFontSize(); |
| const double *m = state->getTextMat(); |
| /* NOTE: adjusting by a constant is hack. The correct solution |
| * is probably to use user-fonts and compute the scale on a per |
| * glyph basis instead of for the entire font */ |
| double w = currentFont->getSubstitutionCorrection(state->getFont()); |
| matrix.xx = m[0] * fontSize * state->getHorizScaling() * w; |
| matrix.yx = m[1] * fontSize * state->getHorizScaling() * w; |
| matrix.xy = -m[2] * fontSize; |
| matrix.yy = -m[3] * fontSize; |
| matrix.x0 = 0; |
| matrix.y0 = 0; |
| |
| LOG(printf("font matrix: %f %f %f %f\n", matrix.xx, matrix.yx, matrix.xy, matrix.yy)); |
| |
| /* Make sure the font matrix is invertible before setting it. cairo |
| * will blow up if we give it a matrix that's not invertible, so we |
| * need to check before passing it to cairo_set_font_matrix. Ignoring it |
| * is likely to give better results than not rendering anything at |
| * all. See #18254. |
| */ |
| invert_matrix = matrix; |
| if (cairo_matrix_invert(&invert_matrix)) { |
| error(errSyntaxWarning, -1, "font matrix not invertible"); |
| text_matrix_valid = false; |
| return; |
| } |
| |
| cairo_set_font_matrix(cairo, &matrix); |
| text_matrix_valid = true; |
| } |
| |
| /* Tolerance in pixels for checking if strokes are horizontal or vertical |
| * lines in device space */ |
| #define STROKE_COORD_TOLERANCE 0.5 |
| |
| /* Align stroke coordinate i if the point is the start or end of a |
| * horizontal or vertical line */ |
| void CairoOutputDev::alignStrokeCoords(const GfxSubpath *subpath, int i, double *x, double *y) |
| { |
| double x1, y1, x2, y2; |
| bool align = false; |
| |
| x1 = subpath->getX(i); |
| y1 = subpath->getY(i); |
| cairo_user_to_device(cairo, &x1, &y1); |
| |
| // Does the current coord and prev coord form a horiz or vert line? |
| if (i > 0 && !subpath->getCurve(i - 1)) { |
| x2 = subpath->getX(i - 1); |
| y2 = subpath->getY(i - 1); |
| cairo_user_to_device(cairo, &x2, &y2); |
| if (fabs(x2 - x1) < STROKE_COORD_TOLERANCE || fabs(y2 - y1) < STROKE_COORD_TOLERANCE) { |
| align = true; |
| } |
| } |
| |
| // Does the current coord and next coord form a horiz or vert line? |
| if (i < subpath->getNumPoints() - 1 && !subpath->getCurve(i + 1)) { |
| x2 = subpath->getX(i + 1); |
| y2 = subpath->getY(i + 1); |
| cairo_user_to_device(cairo, &x2, &y2); |
| if (fabs(x2 - x1) < STROKE_COORD_TOLERANCE || fabs(y2 - y1) < STROKE_COORD_TOLERANCE) { |
| align = true; |
| } |
| } |
| |
| *x = subpath->getX(i); |
| *y = subpath->getY(i); |
| if (align) { |
| /* see http://www.cairographics.org/FAQ/#sharp_lines */ |
| cairo_user_to_device(cairo, x, y); |
| *x = floor(*x) + 0.5; |
| *y = floor(*y) + 0.5; |
| cairo_device_to_user(cairo, x, y); |
| } |
| } |
| |
| #undef STROKE_COORD_TOLERANCE |
| |
| void CairoOutputDev::doPath(cairo_t *c, GfxState *state, const GfxPath *path) |
| { |
| int i, j; |
| double x, y; |
| cairo_new_path(c); |
| for (i = 0; i < path->getNumSubpaths(); ++i) { |
| const GfxSubpath *subpath = path->getSubpath(i); |
| if (subpath->getNumPoints() > 0) { |
| if (align_stroke_coords) { |
| alignStrokeCoords(subpath, 0, &x, &y); |
| } else { |
| x = subpath->getX(0); |
| y = subpath->getY(0); |
| } |
| cairo_move_to(c, x, y); |
| j = 1; |
| while (j < subpath->getNumPoints()) { |
| if (subpath->getCurve(j)) { |
| if (align_stroke_coords) { |
| alignStrokeCoords(subpath, j + 2, &x, &y); |
| } else { |
| x = subpath->getX(j + 2); |
| y = subpath->getY(j + 2); |
| } |
| cairo_curve_to(c, subpath->getX(j), subpath->getY(j), subpath->getX(j + 1), subpath->getY(j + 1), x, y); |
| |
| j += 3; |
| } else { |
| if (align_stroke_coords) { |
| alignStrokeCoords(subpath, j, &x, &y); |
| } else { |
| x = subpath->getX(j); |
| y = subpath->getY(j); |
| } |
| cairo_line_to(c, x, y); |
| ++j; |
| } |
| } |
| if (subpath->isClosed()) { |
| LOG(printf("close\n")); |
| cairo_close_path(c); |
| } |
| } |
| } |
| } |
| |
| void CairoOutputDev::stroke(GfxState *state) |
| { |
| if (t3_render_state == Type3RenderMask) { |
| GfxGray gray; |
| state->getFillGray(&gray); |
| if (colToDbl(gray) > 0.5) { |
| return; |
| } |
| } |
| |
| if (adjusted_stroke_width) { |
| align_stroke_coords = true; |
| } |
| doPath(cairo, state, state->getPath()); |
| align_stroke_coords = false; |
| cairo_set_source(cairo, stroke_pattern); |
| LOG(printf("stroke\n")); |
| if (strokePathClip) { |
| cairo_push_group(cairo); |
| cairo_stroke(cairo); |
| cairo_pop_group_to_source(cairo); |
| fillToStrokePathClip(state); |
| } else { |
| cairo_stroke(cairo); |
| } |
| if (cairo_shape) { |
| doPath(cairo_shape, state, state->getPath()); |
| cairo_stroke(cairo_shape); |
| } |
| } |
| |
| void CairoOutputDev::fill(GfxState *state) |
| { |
| if (t3_render_state == Type3RenderMask) { |
| GfxGray gray; |
| state->getFillGray(&gray); |
| if (colToDbl(gray) > 0.5) { |
| return; |
| } |
| } |
| |
| doPath(cairo, state, state->getPath()); |
| cairo_set_fill_rule(cairo, CAIRO_FILL_RULE_WINDING); |
| cairo_set_source(cairo, fill_pattern); |
| LOG(printf("fill\n")); |
| // XXX: how do we get the path |
| if (mask) { |
| cairo_save(cairo); |
| cairo_clip(cairo); |
| if (strokePathClip) { |
| cairo_push_group(cairo); |
| fillToStrokePathClip(state); |
| cairo_pop_group_to_source(cairo); |
| } |
| cairo_set_matrix(cairo, &mask_matrix); |
| cairo_mask(cairo, mask); |
| cairo_restore(cairo); |
| } else if (strokePathClip) { |
| fillToStrokePathClip(state); |
| } else { |
| cairo_fill(cairo); |
| } |
| if (cairo_shape) { |
| cairo_set_fill_rule(cairo_shape, CAIRO_FILL_RULE_WINDING); |
| doPath(cairo_shape, state, state->getPath()); |
| cairo_fill(cairo_shape); |
| } |
| } |
| |
| void CairoOutputDev::eoFill(GfxState *state) |
| { |
| doPath(cairo, state, state->getPath()); |
| cairo_set_fill_rule(cairo, CAIRO_FILL_RULE_EVEN_ODD); |
| cairo_set_source(cairo, fill_pattern); |
| LOG(printf("fill-eo\n")); |
| |
| if (mask) { |
| cairo_save(cairo); |
| cairo_clip(cairo); |
| cairo_set_matrix(cairo, &mask_matrix); |
| cairo_mask(cairo, mask); |
| cairo_restore(cairo); |
| } else { |
| cairo_fill(cairo); |
| } |
| if (cairo_shape) { |
| cairo_set_fill_rule(cairo_shape, CAIRO_FILL_RULE_EVEN_ODD); |
| doPath(cairo_shape, state, state->getPath()); |
| cairo_fill(cairo_shape); |
| } |
| } |
| |
| bool CairoOutputDev::tilingPatternFill(GfxState *state, Gfx *gfxA, Catalog *cat, GfxTilingPattern *tPat, const double *mat, int x0, int y0, int x1, int y1, double xStep, double yStep) |
| { |
| PDFRectangle box; |
| Gfx *gfx; |
| cairo_pattern_t *pattern; |
| cairo_surface_t *surface; |
| cairo_matrix_t matrix; |
| cairo_matrix_t pattern_matrix; |
| cairo_t *old_cairo; |
| double xMin, yMin, xMax, yMax; |
| double width, height; |
| double scaleX, scaleY; |
| int surface_width, surface_height; |
| StrokePathClip *strokePathTmp; |
| bool adjusted_stroke_width_tmp; |
| cairo_pattern_t *maskTmp; |
| const double *bbox = tPat->getBBox(); |
| const double *pmat = tPat->getMatrix(); |
| const int paintType = tPat->getPaintType(); |
| Dict *resDict = tPat->getResDict(); |
| Object *str = tPat->getContentStream(); |
| |
| width = bbox[2] - bbox[0]; |
| height = bbox[3] - bbox[1]; |
| |
| if (xStep != width || yStep != height) { |
| return false; |
| } |
| /* TODO: implement the other cases here too */ |
| |
| // Find the width and height of the transformed pattern |
| cairo_get_matrix(cairo, &matrix); |
| cairo_matrix_init(&pattern_matrix, mat[0], mat[1], mat[2], mat[3], mat[4], mat[5]); |
| cairo_matrix_multiply(&matrix, &matrix, &pattern_matrix); |
| |
| double widthX = width, widthY = 0; |
| cairo_matrix_transform_distance(&matrix, &widthX, &widthY); |
| surface_width = ceil(sqrt(widthX * widthX + widthY * widthY)); |
| |
| double heightX = 0, heightY = height; |
| cairo_matrix_transform_distance(&matrix, &heightX, &heightY); |
| surface_height = ceil(sqrt(heightX * heightX + heightY * heightY)); |
| scaleX = surface_width / width; |
| scaleY = surface_height / height; |
| |
| surface = cairo_surface_create_similar(cairo_get_target(cairo), CAIRO_CONTENT_COLOR_ALPHA, surface_width, surface_height); |
| if (cairo_surface_status(surface)) { |
| return false; |
| } |
| |
| old_cairo = cairo; |
| cairo = cairo_create(surface); |
| cairo_surface_destroy(surface); |
| copyAntialias(cairo, old_cairo); |
| |
| box.x1 = bbox[0]; |
| box.y1 = bbox[1]; |
| box.x2 = bbox[2]; |
| box.y2 = bbox[3]; |
| cairo_scale(cairo, scaleX, scaleY); |
| cairo_translate(cairo, -box.x1, -box.y1); |
| |
| strokePathTmp = strokePathClip; |
| strokePathClip = nullptr; |
| adjusted_stroke_width_tmp = adjusted_stroke_width; |
| maskTmp = mask; |
| mask = nullptr; |
| gfx = new Gfx(doc, this, resDict, &box, nullptr, nullptr, nullptr, gfxA); |
| if (paintType == 2) { |
| inUncoloredPattern = true; |
| } |
| gfx->display(str); |
| if (paintType == 2) { |
| inUncoloredPattern = false; |
| } |
| delete gfx; |
| strokePathClip = strokePathTmp; |
| adjusted_stroke_width = adjusted_stroke_width_tmp; |
| mask = maskTmp; |
| |
| pattern = cairo_pattern_create_for_surface(cairo_get_target(cairo)); |
| cairo_destroy(cairo); |
| cairo = old_cairo; |
| if (cairo_pattern_status(pattern)) { |
| return false; |
| } |
| |
| // Cairo can fail if the pattern translation is too large. Fix by making the |
| // translation smaller. |
| const double det = pmat[0] * pmat[3] - pmat[1] * pmat[2]; |
| |
| // Find the number of repetitions of pattern we need to shift by. Transform |
| // the translation component of pmat (pmat[4] and pmat[5]) into the pattern's |
| // coordinate system by multiplying by inverse of pmat, then divide by |
| // pattern size (xStep and yStep). |
| const double xoffset = round((pmat[3] * pmat[4] - pmat[2] * pmat[5]) / (xStep * det)); |
| const double yoffset = -round((pmat[1] * pmat[4] - pmat[0] * pmat[5]) / (yStep * det)); |
| |
| if (!std::isfinite(xoffset) || !std::isfinite(yoffset)) { |
| error(errSyntaxWarning, -1, "CairoOutputDev: Singular matrix in tilingPatternFill"); |
| return false; |
| } |
| |
| // Shift pattern_matrix by multiples of the pattern size. |
| pattern_matrix.x0 -= xoffset * pattern_matrix.xx * xStep + yoffset * pattern_matrix.xy * yStep; |
| pattern_matrix.y0 -= xoffset * pattern_matrix.yx * xStep + yoffset * pattern_matrix.yy * yStep; |
| |
| state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax); |
| cairo_rectangle(cairo, xMin, yMin, xMax - xMin, yMax - yMin); |
| |
| cairo_matrix_init_scale(&matrix, scaleX, scaleY); |
| cairo_matrix_translate(&matrix, -box.x1, -box.y1); |
| cairo_pattern_set_matrix(pattern, &matrix); |
| |
| cairo_transform(cairo, &pattern_matrix); |
| cairo_set_source(cairo, pattern); |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT); |
| if (strokePathClip) { |
| fillToStrokePathClip(state); |
| } else { |
| cairo_fill(cairo); |
| } |
| |
| cairo_pattern_destroy(pattern); |
| |
| return true; |
| } |
| |
| bool CairoOutputDev::functionShadedFill(GfxState *state, GfxFunctionShading *shading) |
| { |
| // Function shaded fills are subdivided to rectangles that are the |
| // following size in device space. Note when printing this size is |
| // in points. |
| const int subdivide_pixels = 10; |
| |
| double x_begin, x_end, x1, x2; |
| double y_begin, y_end, y1, y2; |
| double x_step; |
| double y_step; |
| GfxColor color; |
| GfxRGB rgb; |
| cairo_matrix_t mat; |
| |
| const double *matrix = shading->getMatrix(); |
| mat.xx = matrix[0]; |
| mat.yx = matrix[1]; |
| mat.xy = matrix[2]; |
| mat.yy = matrix[3]; |
| mat.x0 = matrix[4]; |
| mat.y0 = matrix[5]; |
| if (cairo_matrix_invert(&mat)) { |
| error(errSyntaxWarning, -1, "matrix not invertible"); |
| return false; |
| } |
| |
| // get cell size in pattern space |
| x_step = y_step = subdivide_pixels; |
| cairo_matrix_transform_distance(&mat, &x_step, &y_step); |
| |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = cairo_pattern_create_mesh(); |
| cairo_pattern_set_matrix(fill_pattern, &mat); |
| shading->getDomain(&x_begin, &y_begin, &x_end, &y_end); |
| |
| for (x1 = x_begin; x1 < x_end; x1 += x_step) { |
| x2 = x1 + x_step; |
| if (x2 > x_end) { |
| x2 = x_end; |
| } |
| |
| for (y1 = y_begin; y1 < y_end; y1 += y_step) { |
| y2 = y1 + y_step; |
| if (y2 > y_end) { |
| y2 = y_end; |
| } |
| |
| cairo_mesh_pattern_begin_patch(fill_pattern); |
| cairo_mesh_pattern_move_to(fill_pattern, x1, y1); |
| cairo_mesh_pattern_line_to(fill_pattern, x2, y1); |
| cairo_mesh_pattern_line_to(fill_pattern, x2, y2); |
| cairo_mesh_pattern_line_to(fill_pattern, x1, y2); |
| |
| shading->getColor(x1, y1, &color); |
| shading->getColorSpace()->getRGB(&color, &rgb); |
| cairo_mesh_pattern_set_corner_color_rgb(fill_pattern, 0, colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b)); |
| |
| shading->getColor(x2, y1, &color); |
| shading->getColorSpace()->getRGB(&color, &rgb); |
| cairo_mesh_pattern_set_corner_color_rgb(fill_pattern, 1, colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b)); |
| |
| shading->getColor(x2, y2, &color); |
| shading->getColorSpace()->getRGB(&color, &rgb); |
| cairo_mesh_pattern_set_corner_color_rgb(fill_pattern, 2, colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b)); |
| |
| shading->getColor(x1, y2, &color); |
| shading->getColorSpace()->getRGB(&color, &rgb); |
| cairo_mesh_pattern_set_corner_color_rgb(fill_pattern, 3, colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b)); |
| |
| cairo_mesh_pattern_end_patch(fill_pattern); |
| } |
| } |
| |
| double xMin, yMin, xMax, yMax; |
| // get the clip region bbox |
| state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax); |
| state->moveTo(xMin, yMin); |
| state->lineTo(xMin, yMax); |
| state->lineTo(xMax, yMax); |
| state->lineTo(xMax, yMin); |
| state->closePath(); |
| fill(state); |
| state->clearPath(); |
| |
| return true; |
| } |
| |
| bool CairoOutputDev::axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax) |
| { |
| double x0, y0, x1, y1; |
| double dx, dy; |
| |
| shading->getCoords(&x0, &y0, &x1, &y1); |
| dx = x1 - x0; |
| dy = y1 - y0; |
| |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = cairo_pattern_create_linear(x0 + tMin * dx, y0 + tMin * dy, x0 + tMax * dx, y0 + tMax * dy); |
| if (!shading->getExtend0() && !shading->getExtend1()) { |
| cairo_pattern_set_extend(fill_pattern, CAIRO_EXTEND_NONE); |
| } else { |
| cairo_pattern_set_extend(fill_pattern, CAIRO_EXTEND_PAD); |
| } |
| |
| LOG(printf("axial-sh\n")); |
| |
| // TODO: use the actual stops in the shading in the case |
| // of linear interpolation (Type 2 Exponential functions with N=1) |
| return false; |
| } |
| |
| bool CairoOutputDev::axialShadedSupportExtend(GfxState *state, GfxAxialShading *shading) |
| { |
| return (shading->getExtend0() == shading->getExtend1()); |
| } |
| |
| bool CairoOutputDev::radialShadedFill(GfxState *state, GfxRadialShading *shading, double sMin, double sMax) |
| { |
| double x0, y0, r0, x1, y1, r1; |
| double dx, dy, dr; |
| cairo_matrix_t matrix; |
| double scale; |
| |
| shading->getCoords(&x0, &y0, &r0, &x1, &y1, &r1); |
| dx = x1 - x0; |
| dy = y1 - y0; |
| dr = r1 - r0; |
| |
| // Cairo/pixman do not work well with a very large or small scaled |
| // matrix. See cairo bug #81657. |
| // |
| // As a workaround, scale the pattern by the average of the vertical |
| // and horizontal scaling of the current transformation matrix. |
| cairo_get_matrix(cairo, &matrix); |
| scale = (sqrt(matrix.xx * matrix.xx + matrix.yx * matrix.yx) + sqrt(matrix.xy * matrix.xy + matrix.yy * matrix.yy)) / 2; |
| cairo_matrix_init_scale(&matrix, scale, scale); |
| |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = cairo_pattern_create_radial((x0 + sMin * dx) * scale, (y0 + sMin * dy) * scale, (r0 + sMin * dr) * scale, (x0 + sMax * dx) * scale, (y0 + sMax * dy) * scale, (r0 + sMax * dr) * scale); |
| cairo_pattern_set_matrix(fill_pattern, &matrix); |
| if (shading->getExtend0() && shading->getExtend1()) { |
| cairo_pattern_set_extend(fill_pattern, CAIRO_EXTEND_PAD); |
| } else { |
| cairo_pattern_set_extend(fill_pattern, CAIRO_EXTEND_NONE); |
| } |
| |
| LOG(printf("radial-sh\n")); |
| |
| return false; |
| } |
| |
| bool CairoOutputDev::radialShadedSupportExtend(GfxState *state, GfxRadialShading *shading) |
| { |
| return (shading->getExtend0() == shading->getExtend1()); |
| } |
| |
| bool CairoOutputDev::gouraudTriangleShadedFill(GfxState *state, GfxGouraudTriangleShading *shading) |
| { |
| double x0, y0, x1, y1, x2, y2; |
| GfxColor color[3]; |
| int i, j; |
| GfxRGB rgb; |
| |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = cairo_pattern_create_mesh(); |
| |
| for (i = 0; i < shading->getNTriangles(); i++) { |
| if (shading->isParameterized()) { |
| double color0, color1, color2; |
| shading->getTriangle(i, &x0, &y0, &color0, &x1, &y1, &color1, &x2, &y2, &color2); |
| shading->getParameterizedColor(color0, &color[0]); |
| shading->getParameterizedColor(color1, &color[1]); |
| shading->getParameterizedColor(color2, &color[2]); |
| } else { |
| shading->getTriangle(i, &x0, &y0, &color[0], &x1, &y1, &color[1], &x2, &y2, &color[2]); |
| } |
| |
| cairo_mesh_pattern_begin_patch(fill_pattern); |
| |
| cairo_mesh_pattern_move_to(fill_pattern, x0, y0); |
| cairo_mesh_pattern_line_to(fill_pattern, x1, y1); |
| cairo_mesh_pattern_line_to(fill_pattern, x2, y2); |
| |
| for (j = 0; j < 3; j++) { |
| shading->getColorSpace()->getRGB(&color[j], &rgb); |
| cairo_mesh_pattern_set_corner_color_rgb(fill_pattern, j, colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b)); |
| } |
| |
| cairo_mesh_pattern_end_patch(fill_pattern); |
| } |
| |
| double xMin, yMin, xMax, yMax; |
| // get the clip region bbox |
| state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax); |
| state->moveTo(xMin, yMin); |
| state->lineTo(xMin, yMax); |
| state->lineTo(xMax, yMax); |
| state->lineTo(xMax, yMin); |
| state->closePath(); |
| fill(state); |
| state->clearPath(); |
| |
| return true; |
| } |
| |
| bool CairoOutputDev::patchMeshShadedFill(GfxState *state, GfxPatchMeshShading *shading) |
| { |
| int i, j, k; |
| |
| cairo_pattern_destroy(fill_pattern); |
| fill_pattern = cairo_pattern_create_mesh(); |
| |
| for (i = 0; i < shading->getNPatches(); i++) { |
| const GfxPatch *patch = shading->getPatch(i); |
| GfxColor color; |
| GfxRGB rgb; |
| |
| cairo_mesh_pattern_begin_patch(fill_pattern); |
| |
| cairo_mesh_pattern_move_to(fill_pattern, patch->x[0][0], patch->y[0][0]); |
| cairo_mesh_pattern_curve_to(fill_pattern, patch->x[0][1], patch->y[0][1], patch->x[0][2], patch->y[0][2], patch->x[0][3], patch->y[0][3]); |
| |
| cairo_mesh_pattern_curve_to(fill_pattern, patch->x[1][3], patch->y[1][3], patch->x[2][3], patch->y[2][3], patch->x[3][3], patch->y[3][3]); |
| |
| cairo_mesh_pattern_curve_to(fill_pattern, patch->x[3][2], patch->y[3][2], patch->x[3][1], patch->y[3][1], patch->x[3][0], patch->y[3][0]); |
| |
| cairo_mesh_pattern_curve_to(fill_pattern, patch->x[2][0], patch->y[2][0], patch->x[1][0], patch->y[1][0], patch->x[0][0], patch->y[0][0]); |
| |
| cairo_mesh_pattern_set_control_point(fill_pattern, 0, patch->x[1][1], patch->y[1][1]); |
| cairo_mesh_pattern_set_control_point(fill_pattern, 1, patch->x[1][2], patch->y[1][2]); |
| cairo_mesh_pattern_set_control_point(fill_pattern, 2, patch->x[2][2], patch->y[2][2]); |
| cairo_mesh_pattern_set_control_point(fill_pattern, 3, patch->x[2][1], patch->y[2][1]); |
| |
| for (j = 0; j < 4; j++) { |
| int u, v; |
| |
| switch (j) { |
| case 0: |
| u = 0; |
| v = 0; |
| break; |
| case 1: |
| u = 0; |
| v = 1; |
| break; |
| case 2: |
| u = 1; |
| v = 1; |
| break; |
| case 3: |
| u = 1; |
| v = 0; |
| break; |
| } |
| |
| if (shading->isParameterized()) { |
| shading->getParameterizedColor(patch->color[u][v].c[0], &color); |
| } else { |
| for (k = 0; k < shading->getColorSpace()->getNComps(); k++) { |
| // simply cast to the desired type; that's all what is needed. |
| color.c[k] = GfxColorComp(patch->color[u][v].c[k]); |
| } |
| } |
| |
| shading->getColorSpace()->getRGB(&color, &rgb); |
| cairo_mesh_pattern_set_corner_color_rgb(fill_pattern, j, colToDbl(rgb.r), colToDbl(rgb.g), colToDbl(rgb.b)); |
| } |
| cairo_mesh_pattern_end_patch(fill_pattern); |
| } |
| |
| double xMin, yMin, xMax, yMax; |
| // get the clip region bbox |
| state->getUserClipBBox(&xMin, &yMin, &xMax, &yMax); |
| state->moveTo(xMin, yMin); |
| state->lineTo(xMin, yMax); |
| state->lineTo(xMax, yMax); |
| state->lineTo(xMax, yMin); |
| state->closePath(); |
| fill(state); |
| state->clearPath(); |
| |
| return true; |
| } |
| |
| void CairoOutputDev::clip(GfxState *state) |
| { |
| doPath(cairo, state, state->getPath()); |
| cairo_set_fill_rule(cairo, CAIRO_FILL_RULE_WINDING); |
| cairo_clip(cairo); |
| LOG(printf("clip\n")); |
| if (cairo_shape) { |
| doPath(cairo_shape, state, state->getPath()); |
| cairo_set_fill_rule(cairo_shape, CAIRO_FILL_RULE_WINDING); |
| cairo_clip(cairo_shape); |
| } |
| } |
| |
| void CairoOutputDev::eoClip(GfxState *state) |
| { |
| doPath(cairo, state, state->getPath()); |
| cairo_set_fill_rule(cairo, CAIRO_FILL_RULE_EVEN_ODD); |
| cairo_clip(cairo); |
| LOG(printf("clip-eo\n")); |
| if (cairo_shape) { |
| doPath(cairo_shape, state, state->getPath()); |
| cairo_set_fill_rule(cairo_shape, CAIRO_FILL_RULE_EVEN_ODD); |
| cairo_clip(cairo_shape); |
| } |
| } |
| |
| void CairoOutputDev::clipToStrokePath(GfxState *state) |
| { |
| LOG(printf("clip-to-stroke-path\n")); |
| strokePathClip = (StrokePathClip *)gmalloc(sizeof(*strokePathClip)); |
| strokePathClip->path = state->getPath()->copy(); |
| cairo_get_matrix(cairo, &strokePathClip->ctm); |
| strokePathClip->line_width = cairo_get_line_width(cairo); |
| strokePathClip->dash_count = cairo_get_dash_count(cairo); |
| if (strokePathClip->dash_count) { |
| strokePathClip->dashes = (double *)gmallocn(sizeof(double), strokePathClip->dash_count); |
| cairo_get_dash(cairo, strokePathClip->dashes, &strokePathClip->dash_offset); |
| } else { |
| strokePathClip->dashes = nullptr; |
| } |
| strokePathClip->cap = cairo_get_line_cap(cairo); |
| strokePathClip->join = cairo_get_line_join(cairo); |
| strokePathClip->miter = cairo_get_miter_limit(cairo); |
| strokePathClip->ref_count = 1; |
| } |
| |
| void CairoOutputDev::fillToStrokePathClip(GfxState *state) |
| { |
| cairo_save(cairo); |
| |
| cairo_set_matrix(cairo, &strokePathClip->ctm); |
| cairo_set_line_width(cairo, strokePathClip->line_width); |
| cairo_set_dash(cairo, strokePathClip->dashes, strokePathClip->dash_count, strokePathClip->dash_offset); |
| cairo_set_line_cap(cairo, strokePathClip->cap); |
| cairo_set_line_join(cairo, strokePathClip->join); |
| cairo_set_miter_limit(cairo, strokePathClip->miter); |
| doPath(cairo, state, strokePathClip->path); |
| cairo_stroke(cairo); |
| |
| cairo_restore(cairo); |
| } |
| |
| void CairoOutputDev::beginString(GfxState *state, const GooString *s) |
| { |
| int len = s->getLength(); |
| |
| if (needFontUpdate) { |
| updateFont(state); |
| } |
| |
| if (!currentFont) { |
| return; |
| } |
| |
| glyphs = (cairo_glyph_t *)gmallocn(len, sizeof(cairo_glyph_t)); |
| glyphCount = 0; |
| if (use_show_text_glyphs) { |
| clusters = (cairo_text_cluster_t *)gmallocn(len, sizeof(cairo_text_cluster_t)); |
| clusterCount = 0; |
| utf8Max = len * 2; // start with twice the number of glyphs. we will realloc if we need more. |
| utf8 = (char *)gmalloc(utf8Max); |
| utf8Count = 0; |
| } |
| } |
| |
| void CairoOutputDev::drawChar(GfxState *state, double x, double y, double dx, double dy, double originX, double originY, CharCode code, int nBytes, const Unicode *u, int uLen) |
| { |
| if (currentFont) { |
| glyphs[glyphCount].index = currentFont->getGlyph(code, u, uLen); |
| glyphs[glyphCount].x = x - originX; |
| glyphs[glyphCount].y = y - originY; |
| glyphCount++; |
| if (use_show_text_glyphs) { |
| const UnicodeMap *utf8Map = globalParams->getUtf8Map(); |
| if (utf8Max - utf8Count < uLen * 6) { |
| // utf8 encoded characters can be up to 6 bytes |
| if (utf8Max > uLen * 6) { |
| utf8Max *= 2; |
| } else { |
| utf8Max += 2 * uLen * 6; |
| } |
| utf8 = (char *)grealloc(utf8, utf8Max); |
| } |
| clusters[clusterCount].num_bytes = 0; |
| for (int i = 0; i < uLen; i++) { |
| int size = utf8Map->mapUnicode(u[i], utf8 + utf8Count, utf8Max - utf8Count); |
| utf8Count += size; |
| clusters[clusterCount].num_bytes += size; |
| } |
| clusters[clusterCount].num_glyphs = 1; |
| clusterCount++; |
| } |
| } |
| |
| if (!textPage) { |
| return; |
| } |
| actualText->addChar(state, x, y, dx, dy, code, nBytes, u, uLen); |
| } |
| |
| void CairoOutputDev::endString(GfxState *state) |
| { |
| int render; |
| |
| if (!currentFont) { |
| return; |
| } |
| |
| // endString can be called without a corresponding beginString. If this |
| // happens glyphs will be null so don't draw anything, just return. |
| // XXX: OutputDevs should probably not have to deal with this... |
| if (!glyphs) { |
| return; |
| } |
| |
| // ignore empty strings and invisible text -- this is used by |
| // Acrobat Capture |
| render = state->getRender(); |
| if (render == 3 || glyphCount == 0 || !text_matrix_valid) { |
| goto finish; |
| } |
| |
| if (state->getFont()->getType() == fontType3 && render != 7) { |
| // If the current font is a type 3 font, we should ignore the text rendering mode |
| // (and use the default of 0) as long as we are going to either fill or stroke. |
| render = 0; |
| } |
| |
| if (!(render & 1)) { |
| LOG(printf("fill string\n")); |
| cairo_set_source(cairo, fill_pattern); |
| if (use_show_text_glyphs) { |
| cairo_show_text_glyphs(cairo, utf8, utf8Count, glyphs, glyphCount, clusters, clusterCount, (cairo_text_cluster_flags_t)0); |
| } else { |
| cairo_show_glyphs(cairo, glyphs, glyphCount); |
| } |
| if (cairo_shape) { |
| cairo_show_glyphs(cairo_shape, glyphs, glyphCount); |
| } |
| } |
| |
| // stroke |
| if ((render & 3) == 1 || (render & 3) == 2) { |
| LOG(printf("stroke string\n")); |
| cairo_set_source(cairo, stroke_pattern); |
| cairo_glyph_path(cairo, glyphs, glyphCount); |
| cairo_stroke(cairo); |
| if (cairo_shape) { |
| cairo_glyph_path(cairo_shape, glyphs, glyphCount); |
| cairo_stroke(cairo_shape); |
| } |
| } |
| |
| // clip |
| if ((render & 4)) { |
| LOG(printf("clip string\n")); |
| // append the glyph path to textClipPath. |
| |
| // set textClipPath as the currentPath |
| if (textClipPath) { |
| cairo_append_path(cairo, textClipPath); |
| if (cairo_shape) { |
| cairo_append_path(cairo_shape, textClipPath); |
| } |
| cairo_path_destroy(textClipPath); |
| } |
| |
| // append the glyph path |
| cairo_glyph_path(cairo, glyphs, glyphCount); |
| |
| // move the path back into textClipPath |
| // and clear the current path |
| textClipPath = cairo_copy_path(cairo); |
| cairo_new_path(cairo); |
| if (cairo_shape) { |
| cairo_new_path(cairo_shape); |
| } |
| } |
| |
| finish: |
| gfree(glyphs); |
| glyphs = nullptr; |
| if (use_show_text_glyphs) { |
| gfree(clusters); |
| clusters = nullptr; |
| gfree(utf8); |
| utf8 = nullptr; |
| } |
| } |
| |
| bool CairoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, const Unicode *u, int uLen) |
| { |
| |
| cairo_save(cairo); |
| cairo_matrix_t matrix; |
| |
| const double *ctm = state->getCTM(); |
| matrix.xx = ctm[0]; |
| matrix.yx = ctm[1]; |
| matrix.xy = ctm[2]; |
| matrix.yy = ctm[3]; |
| matrix.x0 = ctm[4]; |
| matrix.y0 = ctm[5]; |
| /* Restore the original matrix and then transform to matrix needed for the |
| * type3 font. This is ugly but seems to work. Perhaps there is a better way to do it?*/ |
| cairo_set_matrix(cairo, &orig_matrix); |
| cairo_transform(cairo, &matrix); |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| cairo_set_matrix(cairo_shape, &orig_matrix); |
| cairo_transform(cairo_shape, &matrix); |
| } |
| cairo_pattern_destroy(stroke_pattern); |
| cairo_pattern_reference(fill_pattern); |
| stroke_pattern = fill_pattern; |
| return false; |
| } |
| |
| void CairoOutputDev::endType3Char(GfxState *state) |
| { |
| cairo_restore(cairo); |
| if (cairo_shape) { |
| cairo_restore(cairo_shape); |
| } |
| } |
| |
| void CairoOutputDev::type3D0(GfxState *state, double wx, double wy) |
| { |
| t3_glyph_wx = wx; |
| t3_glyph_wy = wy; |
| t3_glyph_has_color = true; |
| } |
| |
| void CairoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury) |
| { |
| t3_glyph_wx = wx; |
| t3_glyph_wy = wy; |
| t3_glyph_bbox[0] = llx; |
| t3_glyph_bbox[1] = lly; |
| t3_glyph_bbox[2] = urx; |
| t3_glyph_bbox[3] = ury; |
| t3_glyph_has_bbox = true; |
| t3_glyph_has_color = false; |
| } |
| |
| void CairoOutputDev::beginTextObject(GfxState *state) { } |
| |
| void CairoOutputDev::endTextObject(GfxState *state) |
| { |
| if (textClipPath) { |
| // clip the accumulated text path |
| cairo_append_path(cairo, textClipPath); |
| cairo_clip(cairo); |
| if (cairo_shape) { |
| cairo_append_path(cairo_shape, textClipPath); |
| cairo_clip(cairo_shape); |
| } |
| cairo_path_destroy(textClipPath); |
| textClipPath = nullptr; |
| } |
| } |
| |
| void CairoOutputDev::beginActualText(GfxState *state, const GooString *text) |
| { |
| if (textPage) { |
| actualText->begin(state, text); |
| } |
| } |
| |
| void CairoOutputDev::endActualText(GfxState *state) |
| { |
| if (textPage) { |
| actualText->end(state); |
| } |
| } |
| |
| static inline int splashRound(SplashCoord x) |
| { |
| return (int)floor(x + 0.5); |
| } |
| |
| static inline int splashCeil(SplashCoord x) |
| { |
| return (int)ceil(x); |
| } |
| |
| static inline int splashFloor(SplashCoord x) |
| { |
| return (int)floor(x); |
| } |
| |
| static cairo_surface_t *cairo_surface_create_similar_clip(cairo_t *cairo, cairo_content_t content) |
| { |
| cairo_pattern_t *pattern; |
| cairo_surface_t *surface = nullptr; |
| |
| cairo_push_group_with_content(cairo, content); |
| pattern = cairo_pop_group(cairo); |
| cairo_pattern_get_surface(pattern, &surface); |
| cairo_surface_reference(surface); |
| cairo_pattern_destroy(pattern); |
| return surface; |
| } |
| |
| void CairoOutputDev::beginTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/, GfxColorSpace *blendingColorSpace, bool /*isolated*/, bool knockout, bool forSoftMask) |
| { |
| /* push color space */ |
| ColorSpaceStack *css = new ColorSpaceStack; |
| css->cs = blendingColorSpace; |
| css->knockout = knockout; |
| cairo_get_matrix(cairo, &css->group_matrix); |
| css->next = groupColorSpaceStack; |
| groupColorSpaceStack = css; |
| |
| LOG(printf("begin transparency group. knockout: %s\n", knockout ? "yes" : "no")); |
| |
| if (knockout) { |
| knockoutCount++; |
| if (!cairo_shape) { |
| /* create a surface for tracking the shape */ |
| cairo_surface_t *cairo_shape_surface = cairo_surface_create_similar_clip(cairo, CAIRO_CONTENT_ALPHA); |
| cairo_shape = cairo_create(cairo_shape_surface); |
| cairo_surface_destroy(cairo_shape_surface); |
| copyAntialias(cairo_shape, cairo); |
| |
| /* the color doesn't matter as long as it is opaque */ |
| cairo_set_source_rgb(cairo_shape, 0, 0, 0); |
| cairo_matrix_t matrix; |
| cairo_get_matrix(cairo, &matrix); |
| cairo_set_matrix(cairo_shape, &matrix); |
| } |
| } |
| if (groupColorSpaceStack->next && groupColorSpaceStack->next->knockout) { |
| /* we need to track the shape */ |
| cairo_push_group(cairo_shape); |
| } |
| if (false && forSoftMask) { |
| cairo_push_group_with_content(cairo, CAIRO_CONTENT_ALPHA); |
| } else { |
| cairo_push_group(cairo); |
| } |
| |
| /* push_group has an implicit cairo_save() */ |
| if (knockout) { |
| /*XXX: let's hope this matches the semantics needed */ |
| cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE); |
| } else { |
| cairo_set_operator(cairo, CAIRO_OPERATOR_OVER); |
| } |
| } |
| |
| void CairoOutputDev::endTransparencyGroup(GfxState * /*state*/) |
| { |
| if (group) { |
| cairo_pattern_destroy(group); |
| } |
| group = cairo_pop_group(cairo); |
| |
| LOG(printf("end transparency group\n")); |
| |
| if (groupColorSpaceStack->next && groupColorSpaceStack->next->knockout) { |
| if (shape) { |
| cairo_pattern_destroy(shape); |
| } |
| shape = cairo_pop_group(cairo_shape); |
| } |
| } |
| |
| void CairoOutputDev::paintTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/) |
| { |
| LOG(printf("paint transparency group\n")); |
| |
| cairo_save(cairo); |
| cairo_set_matrix(cairo, &groupColorSpaceStack->group_matrix); |
| |
| if (shape) { |
| /* OPERATOR_SOURCE w/ a mask is defined as (src IN mask) ADD (dest OUT mask) |
| * however our source has already been clipped to mask so we only need to |
| * do ADD and OUT */ |
| |
| /* clear the shape mask */ |
| cairo_set_source(cairo, shape); |
| cairo_set_operator(cairo, CAIRO_OPERATOR_DEST_OUT); |
| cairo_paint(cairo); |
| cairo_set_operator(cairo, CAIRO_OPERATOR_ADD); |
| } |
| cairo_set_source(cairo, group); |
| |
| if (!mask) { |
| cairo_paint_with_alpha(cairo, fill_opacity); |
| cairo_status_t status = cairo_status(cairo); |
| if (status) { |
| printf("BAD status: %s\n", cairo_status_to_string(status)); |
| } |
| } else { |
| if (fill_opacity < 1.0) { |
| cairo_push_group(cairo); |
| } |
| cairo_save(cairo); |
| cairo_set_matrix(cairo, &mask_matrix); |
| cairo_mask(cairo, mask); |
| cairo_restore(cairo); |
| if (fill_opacity < 1.0) { |
| cairo_pop_group_to_source(cairo); |
| cairo_paint_with_alpha(cairo, fill_opacity); |
| } |
| cairo_pattern_destroy(mask); |
| mask = nullptr; |
| } |
| |
| if (shape) { |
| if (cairo_shape) { |
| cairo_set_source(cairo_shape, shape); |
| cairo_paint(cairo_shape); |
| cairo_set_source_rgb(cairo_shape, 0, 0, 0); |
| } |
| cairo_pattern_destroy(shape); |
| shape = nullptr; |
| } |
| |
| popTransparencyGroup(); |
| cairo_restore(cairo); |
| } |
| |
| static int luminocity(uint32_t x) |
| { |
| int r = (x >> 16) & 0xff; |
| int g = (x >> 8) & 0xff; |
| int b = (x >> 0) & 0xff; |
| // an arbitrary integer approximation of .3*r + .59*g + .11*b |
| int y = (r * 19661 + g * 38666 + b * 7209 + 32829) >> 16; |
| return y; |
| } |
| |
| /* XXX: do we need to deal with shape here? */ |
| void CairoOutputDev::setSoftMask(GfxState *state, const double *bbox, bool alpha, Function *transferFunc, GfxColor *backdropColor) |
| { |
| cairo_pattern_destroy(mask); |
| |
| LOG(printf("set softMask\n")); |
| |
| if (!alpha || transferFunc) { |
| /* We need to mask according to the luminocity of the group. |
| * So we paint the group to an image surface convert it to a luminocity map |
| * and then use that as the mask. */ |
| |
| /* Get clip extents in device space */ |
| double x1, y1, x2, y2, x_min, y_min, x_max, y_max; |
| cairo_clip_extents(cairo, &x1, &y1, &x2, &y2); |
| cairo_user_to_device(cairo, &x1, &y1); |
| cairo_user_to_device(cairo, &x2, &y2); |
| x_min = MIN(x1, x2); |
| y_min = MIN(y1, y2); |
| x_max = MAX(x1, x2); |
| y_max = MAX(y1, y2); |
| cairo_clip_extents(cairo, &x1, &y1, &x2, &y2); |
| cairo_user_to_device(cairo, &x1, &y2); |
| cairo_user_to_device(cairo, &x2, &y1); |
| x_min = MIN(x_min, MIN(x1, x2)); |
| y_min = MIN(y_min, MIN(y1, y2)); |
| x_max = MAX(x_max, MAX(x1, x2)); |
| y_max = MAX(y_max, MAX(y1, y2)); |
| |
| int width = (int)(ceil(x_max) - floor(x_min)); |
| int height = (int)(ceil(y_max) - floor(y_min)); |
| |
| /* Get group device offset */ |
| double x_offset, y_offset; |
| if (cairo_get_group_target(cairo) == cairo_get_target(cairo)) { |
| cairo_surface_get_device_offset(cairo_get_group_target(cairo), &x_offset, &y_offset); |
| } else { |
| cairo_surface_t *pats; |
| cairo_pattern_get_surface(group, &pats); |
| cairo_surface_get_device_offset(pats, &x_offset, &y_offset); |
| } |
| |
| /* Adjust extents by group offset */ |
| x_min += x_offset; |
| y_min += y_offset; |
| |
| cairo_surface_t *source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height); |
| cairo_t *maskCtx = cairo_create(source); |
| copyAntialias(maskCtx, cairo); |
| |
| // XXX: hopefully this uses the correct color space */ |
| if (!alpha && groupColorSpaceStack->cs) { |
| GfxRGB backdropColorRGB; |
| groupColorSpaceStack->cs->getRGB(backdropColor, &backdropColorRGB); |
| /* paint the backdrop */ |
| cairo_set_source_rgb(maskCtx, colToDbl(backdropColorRGB.r), colToDbl(backdropColorRGB.g), colToDbl(backdropColorRGB.b)); |
| } |
| cairo_paint(maskCtx); |
| |
| /* Copy source ctm to mask ctm and translate origin so that the |
| * mask appears it the same location on the source surface. */ |
| cairo_matrix_t mat, tmat; |
| cairo_matrix_init_translate(&tmat, -x_min, -y_min); |
| cairo_get_matrix(cairo, &mat); |
| cairo_matrix_multiply(&mat, &mat, &tmat); |
| cairo_set_matrix(maskCtx, &mat); |
| |
| /* make the device offset of the new mask match that of the group */ |
| cairo_surface_set_device_offset(source, x_offset, y_offset); |
| |
| /* paint the group */ |
| cairo_set_source(maskCtx, group); |
| cairo_paint(maskCtx); |
| |
| /* XXX status = cairo_status(maskCtx); */ |
| cairo_destroy(maskCtx); |
| |
| /* convert to a luminocity map */ |
| uint32_t *source_data = reinterpret_cast<uint32_t *>(cairo_image_surface_get_data(source)); |
| if (source_data) { |
| /* get stride in units of 32 bits */ |
| ptrdiff_t stride = cairo_image_surface_get_stride(source) / 4; |
| for (int y = 0; y < height; y++) { |
| for (int x = 0; x < width; x++) { |
| int lum = alpha ? fill_opacity : luminocity(source_data[y * stride + x]); |
| if (transferFunc) { |
| double lum_in, lum_out; |
| lum_in = lum / 256.0; |
| transferFunc->transform(&lum_in, &lum_out); |
| lum = (int)(lum_out * 255.0 + 0.5); |
| } |
| source_data[y * stride + x] = lum << 24; |
| } |
| } |
| cairo_surface_mark_dirty(source); |
| } |
| |
| /* setup the new mask pattern */ |
| mask = cairo_pattern_create_for_surface(source); |
| cairo_get_matrix(cairo, &mask_matrix); |
| |
| if (cairo_get_group_target(cairo) == cairo_get_target(cairo)) { |
| cairo_pattern_set_matrix(mask, &mat); |
| } else { |
| cairo_matrix_t patMatrix; |
| cairo_pattern_get_matrix(group, &patMatrix); |
| /* Apply x_min, y_min offset to it appears in the same location as source. */ |
| cairo_matrix_multiply(&patMatrix, &patMatrix, &tmat); |
| cairo_pattern_set_matrix(mask, &patMatrix); |
| } |
| |
| cairo_surface_destroy(source); |
| } else if (alpha) { |
| mask = cairo_pattern_reference(group); |
| cairo_get_matrix(cairo, &mask_matrix); |
| } |
| |
| popTransparencyGroup(); |
| } |
| |
| void CairoOutputDev::popTransparencyGroup() |
| { |
| /* pop color space */ |
| ColorSpaceStack *css = groupColorSpaceStack; |
| if (css->knockout) { |
| knockoutCount--; |
| if (!knockoutCount) { |
| /* we don't need to track the shape anymore because |
| * we are not above any knockout groups */ |
| cairo_destroy(cairo_shape); |
| cairo_shape = nullptr; |
| } |
| } |
| groupColorSpaceStack = css->next; |
| delete css; |
| } |
| |
| void CairoOutputDev::clearSoftMask(GfxState * /*state*/) |
| { |
| if (mask) { |
| cairo_pattern_destroy(mask); |
| } |
| mask = nullptr; |
| } |
| |
| /* Taken from cairo/doc/tutorial/src/singular.c */ |
| static void get_singular_values(const cairo_matrix_t *matrix, double *major, double *minor) |
| { |
| double xx = matrix->xx, xy = matrix->xy; |
| double yx = matrix->yx, yy = matrix->yy; |
| |
| double a = xx * xx + yx * yx; |
| double b = xy * xy + yy * yy; |
| double k = xx * xy + yx * yy; |
| |
| double f = (a + b) * .5; |
| double g = (a - b) * .5; |
| double delta = sqrt(g * g + k * k); |
| |
| if (major) { |
| *major = sqrt(f + delta); |
| } |
| if (minor) { |
| *minor = sqrt(f - delta); |
| } |
| } |
| |
| void CairoOutputDev::getScaledSize(const cairo_matrix_t *matrix, int orig_width, int orig_height, int *scaledWidth, int *scaledHeight) |
| { |
| double xScale; |
| double yScale; |
| if (orig_width > orig_height) { |
| get_singular_values(matrix, &xScale, &yScale); |
| } else { |
| get_singular_values(matrix, &yScale, &xScale); |
| } |
| |
| int tx, tx2, ty, ty2; /* the integer co-ordinates of the resulting image */ |
| if (xScale >= 0) { |
| tx = splashRound(matrix->x0 - 0.01); |
| tx2 = splashRound(matrix->x0 + xScale + 0.01) - 1; |
| } else { |
| tx = splashRound(matrix->x0 + 0.01) - 1; |
| tx2 = splashRound(matrix->x0 + xScale - 0.01); |
| } |
| *scaledWidth = abs(tx2 - tx) + 1; |
| // scaledWidth = splashRound(fabs(xScale)); |
| if (*scaledWidth == 0) { |
| // technically, this should draw nothing, but it generally seems |
| // better to draw a one-pixel-wide stripe rather than throwing it |
| // away |
| *scaledWidth = 1; |
| } |
| if (yScale >= 0) { |
| ty = splashFloor(matrix->y0 + 0.01); |
| ty2 = splashCeil(matrix->y0 + yScale - 0.01); |
| } else { |
| ty = splashCeil(matrix->y0 - 0.01); |
| ty2 = splashFloor(matrix->y0 + yScale + 0.01); |
| } |
| *scaledHeight = abs(ty2 - ty); |
| if (*scaledHeight == 0) { |
| *scaledHeight = 1; |
| } |
| } |
| |
| cairo_filter_t CairoOutputDev::getFilterForSurface(cairo_surface_t *image, bool interpolate) |
| { |
| if (interpolate) { |
| return CAIRO_FILTER_GOOD; |
| } |
| |
| int orig_width = cairo_image_surface_get_width(image); |
| int orig_height = cairo_image_surface_get_height(image); |
| if (orig_width == 0 || orig_height == 0) { |
| return CAIRO_FILTER_NEAREST; |
| } |
| |
| /* When printing, don't change the interpolation. */ |
| if (printing) { |
| return CAIRO_FILTER_NEAREST; |
| } |
| |
| cairo_matrix_t matrix; |
| cairo_get_matrix(cairo, &matrix); |
| int scaled_width, scaled_height; |
| getScaledSize(&matrix, orig_width, orig_height, &scaled_width, &scaled_height); |
| |
| /* When scale factor is >= 400% we don't interpolate. See bugs #25268, #9860 */ |
| if (scaled_width / orig_width >= 4 || scaled_height / orig_height >= 4) { |
| return CAIRO_FILTER_NEAREST; |
| } |
| |
| return CAIRO_FILTER_GOOD; |
| } |
| |
| void CairoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str, int width, int height, bool invert, bool interpolate, bool inlineImg) |
| { |
| |
| /* FIXME: Doesn't the image mask support any colorspace? */ |
| cairo_set_source(cairo, fill_pattern); |
| |
| /* work around a cairo bug when scaling 1x1 surfaces */ |
| if (width == 1 && height == 1) { |
| ImageStream *imgStr; |
| unsigned char pix; |
| int invert_bit; |
| |
| imgStr = new ImageStream(str, width, 1, 1); |
| imgStr->reset(); |
| imgStr->getPixel(&pix); |
| imgStr->close(); |
| delete imgStr; |
| |
| invert_bit = invert ? 1 : 0; |
| if (pix ^ invert_bit) { |
| return; |
| } |
| |
| cairo_save(cairo); |
| cairo_rectangle(cairo, 0., 0., width, height); |
| cairo_fill(cairo); |
| cairo_restore(cairo); |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| cairo_rectangle(cairo_shape, 0., 0., width, height); |
| cairo_fill(cairo_shape); |
| cairo_restore(cairo_shape); |
| } |
| return; |
| } |
| |
| /* shape is 1.0 for painted areas, 0.0 for unpainted ones */ |
| |
| cairo_matrix_t matrix; |
| cairo_get_matrix(cairo, &matrix); |
| // XXX: it is possible that we should only do sub pixel positioning if |
| // we are rendering fonts */ |
| drawImageMaskRegular(state, ref, str, width, height, invert, interpolate, inlineImg); |
| } |
| |
| void CairoOutputDev::setSoftMaskFromImageMask(GfxState *state, Object *ref, Stream *str, int width, int height, bool invert, bool inlineImg, double *baseMatrix) |
| { |
| |
| /* FIXME: Doesn't the image mask support any colorspace? */ |
| cairo_set_source(cairo, fill_pattern); |
| |
| /* work around a cairo bug when scaling 1x1 surfaces */ |
| if (width == 1 && height == 1) { |
| ImageStream *imgStr; |
| unsigned char pix; |
| int invert_bit; |
| |
| imgStr = new ImageStream(str, width, 1, 1); |
| imgStr->reset(); |
| imgStr->getPixel(&pix); |
| imgStr->close(); |
| delete imgStr; |
| |
| invert_bit = invert ? 1 : 0; |
| if (!(pix ^ invert_bit)) { |
| cairo_save(cairo); |
| cairo_rectangle(cairo, 0., 0., width, height); |
| cairo_fill(cairo); |
| cairo_restore(cairo); |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| cairo_rectangle(cairo_shape, 0., 0., width, height); |
| cairo_fill(cairo_shape); |
| cairo_restore(cairo_shape); |
| } |
| } |
| } else { |
| cairo_push_group_with_content(cairo, CAIRO_CONTENT_ALPHA); |
| |
| /* shape is 1.0 for painted areas, 0.0 for unpainted ones */ |
| |
| cairo_matrix_t matrix; |
| cairo_get_matrix(cairo, &matrix); |
| // XXX: it is possible that we should only do sub pixel positioning if |
| // we are rendering fonts */ |
| drawImageMaskRegular(state, ref, str, width, height, invert, false, inlineImg); |
| |
| if (state->getFillColorSpace()->getMode() == csPattern) { |
| cairo_set_source_rgb(cairo, 1, 1, 1); |
| cairo_set_matrix(cairo, &mask_matrix); |
| cairo_mask(cairo, mask); |
| } |
| |
| if (mask) { |
| cairo_pattern_destroy(mask); |
| } |
| mask = cairo_pop_group(cairo); |
| } |
| |
| saveState(state); |
| double bbox[4] = { 0, 0, 1, 1 }; // dummy |
| beginTransparencyGroup(state, bbox, state->getFillColorSpace(), true, false, false); |
| } |
| |
| void CairoOutputDev::unsetSoftMaskFromImageMask(GfxState *state, double *baseMatrix) |
| { |
| double bbox[4] = { 0, 0, 1, 1 }; // dummy |
| |
| endTransparencyGroup(state); |
| restoreState(state); |
| paintTransparencyGroup(state, bbox); |
| clearSoftMask(state); |
| } |
| |
| void CairoOutputDev::drawImageMaskRegular(GfxState *state, Object *ref, Stream *str, int width, int height, bool invert, bool interpolate, bool inlineImg) |
| { |
| unsigned char *buffer; |
| unsigned char *dest; |
| cairo_surface_t *image; |
| cairo_pattern_t *pattern; |
| int x, y, i, bit; |
| ImageStream *imgStr; |
| unsigned char *pix; |
| cairo_matrix_t matrix; |
| int invert_bit; |
| ptrdiff_t row_stride; |
| cairo_filter_t filter; |
| |
| /* TODO: Do we want to cache these? */ |
| imgStr = new ImageStream(str, width, 1, 1); |
| imgStr->reset(); |
| |
| image = cairo_image_surface_create(CAIRO_FORMAT_A1, width, height); |
| if (cairo_surface_status(image)) { |
| goto cleanup; |
| } |
| |
| buffer = cairo_image_surface_get_data(image); |
| row_stride = cairo_image_surface_get_stride(image); |
| |
| invert_bit = invert ? 1 : 0; |
| |
| for (y = 0; y < height; y++) { |
| pix = imgStr->getLine(); |
| dest = buffer + y * row_stride; |
| i = 0; |
| bit = 0; |
| for (x = 0; x < width; x++) { |
| if (bit == 0) { |
| dest[i] = 0; |
| } |
| if (!(pix[x] ^ invert_bit)) { |
| #ifdef WORDS_BIGENDIAN |
| dest[i] |= (1 << (7 - bit)); |
| #else |
| dest[i] |= (1 << bit); |
| #endif |
| } |
| bit++; |
| if (bit > 7) { |
| bit = 0; |
| i++; |
| } |
| } |
| } |
| |
| filter = getFilterForSurface(image, interpolate); |
| |
| cairo_surface_mark_dirty(image); |
| pattern = cairo_pattern_create_for_surface(image); |
| cairo_surface_destroy(image); |
| if (cairo_pattern_status(pattern)) { |
| goto cleanup; |
| } |
| |
| LOG(printf("drawImageMask %dx%d\n", width, height)); |
| |
| cairo_pattern_set_filter(pattern, filter); |
| |
| cairo_matrix_init_translate(&matrix, 0, height); |
| cairo_matrix_scale(&matrix, width, -height); |
| cairo_pattern_set_matrix(pattern, &matrix); |
| if (cairo_pattern_status(pattern)) { |
| cairo_pattern_destroy(pattern); |
| goto cleanup; |
| } |
| |
| if (state->getFillColorSpace()->getMode() == csPattern) { |
| mask = cairo_pattern_reference(pattern); |
| cairo_get_matrix(cairo, &mask_matrix); |
| } else if (!printing) { |
| cairo_save(cairo); |
| cairo_rectangle(cairo, 0., 0., 1., 1.); |
| cairo_clip(cairo); |
| if (strokePathClip) { |
| cairo_push_group(cairo); |
| fillToStrokePathClip(state); |
| cairo_pop_group_to_source(cairo); |
| } |
| cairo_mask(cairo, pattern); |
| cairo_restore(cairo); |
| } else { |
| cairo_mask(cairo, pattern); |
| } |
| |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| cairo_set_source(cairo_shape, pattern); |
| if (!printing) { |
| cairo_rectangle(cairo_shape, 0., 0., 1., 1.); |
| cairo_fill(cairo_shape); |
| } else { |
| cairo_mask(cairo_shape, pattern); |
| } |
| cairo_restore(cairo_shape); |
| } |
| |
| cairo_pattern_destroy(pattern); |
| |
| cleanup: |
| imgStr->close(); |
| delete imgStr; |
| } |
| |
| void CairoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, bool interpolate, Stream *maskStr, int maskWidth, int maskHeight, bool maskInvert, bool maskInterpolate) |
| { |
| ImageStream *maskImgStr, *imgStr; |
| ptrdiff_t row_stride; |
| unsigned char *maskBuffer, *buffer; |
| unsigned char *maskDest; |
| unsigned int *dest; |
| cairo_surface_t *maskImage, *image; |
| cairo_pattern_t *maskPattern, *pattern; |
| cairo_matrix_t matrix; |
| cairo_matrix_t maskMatrix; |
| unsigned char *pix; |
| int x, y; |
| int invert_bit; |
| cairo_filter_t filter; |
| cairo_filter_t maskFilter; |
| |
| maskImgStr = new ImageStream(maskStr, maskWidth, 1, 1); |
| maskImgStr->reset(); |
| |
| maskImage = cairo_image_surface_create(CAIRO_FORMAT_A8, maskWidth, maskHeight); |
| if (cairo_surface_status(maskImage)) { |
| maskImgStr->close(); |
| delete maskImgStr; |
| return; |
| } |
| |
| maskBuffer = cairo_image_surface_get_data(maskImage); |
| row_stride = cairo_image_surface_get_stride(maskImage); |
| |
| invert_bit = maskInvert ? 1 : 0; |
| |
| for (y = 0; y < maskHeight; y++) { |
| pix = maskImgStr->getLine(); |
| maskDest = maskBuffer + y * row_stride; |
| for (x = 0; x < maskWidth; x++) { |
| if (pix[x] ^ invert_bit) { |
| *maskDest++ = 0; |
| } else { |
| *maskDest++ = 255; |
| } |
| } |
| } |
| |
| maskImgStr->close(); |
| delete maskImgStr; |
| |
| maskFilter = getFilterForSurface(maskImage, maskInterpolate); |
| |
| cairo_surface_mark_dirty(maskImage); |
| maskPattern = cairo_pattern_create_for_surface(maskImage); |
| cairo_surface_destroy(maskImage); |
| if (cairo_pattern_status(maskPattern)) { |
| return; |
| } |
| |
| #if 0 |
| /* ICCBased color space doesn't do any color correction |
| * so check its underlying color space as well */ |
| int is_identity_transform; |
| is_identity_transform = colorMap->getColorSpace()->getMode() == csDeviceRGB || |
| (colorMap->getColorSpace()->getMode() == csICCBased && |
| ((GfxICCBasedColorSpace*)colorMap->getColorSpace())->getAlt()->getMode() == csDeviceRGB); |
| #endif |
| |
| /* TODO: Do we want to cache these? */ |
| imgStr = new ImageStream(str, width, colorMap->getNumPixelComps(), colorMap->getBits()); |
| imgStr->reset(); |
| |
| image = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height); |
| if (cairo_surface_status(image)) { |
| goto cleanup; |
| } |
| |
| buffer = cairo_image_surface_get_data(image); |
| row_stride = cairo_image_surface_get_stride(image); |
| for (y = 0; y < height; y++) { |
| dest = reinterpret_cast<unsigned int *>(buffer + y * row_stride); |
| pix = imgStr->getLine(); |
| colorMap->getRGBLine(pix, dest, width); |
| } |
| |
| filter = getFilterForSurface(image, interpolate); |
| |
| cairo_surface_mark_dirty(image); |
| pattern = cairo_pattern_create_for_surface(image); |
| cairo_surface_destroy(image); |
| if (cairo_pattern_status(pattern)) { |
| goto cleanup; |
| } |
| |
| LOG(printf("drawMaskedImage %dx%d\n", width, height)); |
| |
| cairo_pattern_set_filter(pattern, filter); |
| cairo_pattern_set_filter(maskPattern, maskFilter); |
| |
| if (!printing) { |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD); |
| cairo_pattern_set_extend(maskPattern, CAIRO_EXTEND_PAD); |
| } |
| |
| cairo_matrix_init_translate(&matrix, 0, height); |
| cairo_matrix_scale(&matrix, width, -height); |
| cairo_pattern_set_matrix(pattern, &matrix); |
| if (cairo_pattern_status(pattern)) { |
| cairo_pattern_destroy(pattern); |
| cairo_pattern_destroy(maskPattern); |
| goto cleanup; |
| } |
| |
| cairo_matrix_init_translate(&maskMatrix, 0, maskHeight); |
| cairo_matrix_scale(&maskMatrix, maskWidth, -maskHeight); |
| cairo_pattern_set_matrix(maskPattern, &maskMatrix); |
| if (cairo_pattern_status(maskPattern)) { |
| cairo_pattern_destroy(maskPattern); |
| cairo_pattern_destroy(pattern); |
| goto cleanup; |
| } |
| |
| if (!printing) { |
| cairo_save(cairo); |
| cairo_set_source(cairo, pattern); |
| cairo_rectangle(cairo, 0., 0., 1., 1.); |
| cairo_clip(cairo); |
| cairo_mask(cairo, maskPattern); |
| cairo_restore(cairo); |
| } else { |
| cairo_set_source(cairo, pattern); |
| cairo_mask(cairo, maskPattern); |
| } |
| |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| cairo_set_source(cairo_shape, pattern); |
| if (!printing) { |
| cairo_rectangle(cairo_shape, 0., 0., 1., 1.); |
| cairo_fill(cairo_shape); |
| } else { |
| cairo_mask(cairo_shape, pattern); |
| } |
| cairo_restore(cairo_shape); |
| } |
| |
| cairo_pattern_destroy(maskPattern); |
| cairo_pattern_destroy(pattern); |
| |
| cleanup: |
| imgStr->close(); |
| delete imgStr; |
| } |
| |
| static inline void getMatteColorRgb(GfxImageColorMap *colorMap, const GfxColor *matteColorIn, GfxRGB *matteColorRgb) |
| { |
| colorMap->getColorSpace()->getRGB(matteColorIn, matteColorRgb); |
| matteColorRgb->r = colToByte(matteColorRgb->r); |
| matteColorRgb->g = colToByte(matteColorRgb->g); |
| matteColorRgb->b = colToByte(matteColorRgb->b); |
| } |
| |
| static inline void applyMask(unsigned int *imagePointer, int length, GfxRGB matteColor, unsigned char *alphaPointer) |
| { |
| unsigned char *p, r, g, b; |
| int i; |
| |
| for (i = 0, p = (unsigned char *)imagePointer; i < length; i++, p += 4, alphaPointer++) { |
| if (*alphaPointer) { |
| b = std::clamp(matteColor.b + (int)(p[0] - matteColor.b) * 255 / *alphaPointer, 0, 255); |
| g = std::clamp(matteColor.g + (int)(p[1] - matteColor.g) * 255 / *alphaPointer, 0, 255); |
| r = std::clamp(matteColor.r + (int)(p[2] - matteColor.r) * 255 / *alphaPointer, 0, 255); |
| imagePointer[i] = (r << 16) | (g << 8) | (b << 0); |
| } |
| } |
| } |
| |
| // XXX: is this affect by AIS(alpha is shape)? |
| void CairoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, bool interpolate, Stream *maskStr, int maskWidth, int maskHeight, GfxImageColorMap *maskColorMap, |
| bool maskInterpolate) |
| { |
| ImageStream *maskImgStr, *imgStr; |
| ptrdiff_t row_stride, mask_row_stride; |
| unsigned char *maskBuffer, *buffer; |
| unsigned char *maskDest; |
| unsigned int *dest; |
| cairo_surface_t *maskImage, *image; |
| cairo_pattern_t *maskPattern, *pattern; |
| cairo_matrix_t maskMatrix, matrix; |
| unsigned char *pix; |
| int y; |
| cairo_filter_t filter; |
| cairo_filter_t maskFilter; |
| GfxRGB matteColorRgb; |
| |
| const GfxColor *matteColor = maskColorMap->getMatteColor(); |
| if (matteColor != nullptr) { |
| getMatteColorRgb(colorMap, matteColor, &matteColorRgb); |
| } |
| |
| maskImgStr = new ImageStream(maskStr, maskWidth, maskColorMap->getNumPixelComps(), maskColorMap->getBits()); |
| maskImgStr->reset(); |
| |
| maskImage = cairo_image_surface_create(CAIRO_FORMAT_A8, maskWidth, maskHeight); |
| if (cairo_surface_status(maskImage)) { |
| maskImgStr->close(); |
| delete maskImgStr; |
| return; |
| } |
| |
| maskBuffer = cairo_image_surface_get_data(maskImage); |
| mask_row_stride = cairo_image_surface_get_stride(maskImage); |
| for (y = 0; y < maskHeight; y++) { |
| maskDest = (unsigned char *)(maskBuffer + y * mask_row_stride); |
| pix = maskImgStr->getLine(); |
| if (likely(pix != nullptr)) { |
| maskColorMap->getGrayLine(pix, maskDest, maskWidth); |
| } |
| } |
| |
| maskImgStr->close(); |
| delete maskImgStr; |
| |
| maskFilter = getFilterForSurface(maskImage, maskInterpolate); |
| |
| cairo_surface_mark_dirty(maskImage); |
| maskPattern = cairo_pattern_create_for_surface(maskImage); |
| cairo_surface_destroy(maskImage); |
| if (cairo_pattern_status(maskPattern)) { |
| return; |
| } |
| |
| #if 0 |
| /* ICCBased color space doesn't do any color correction |
| * so check its underlying color space as well */ |
| int is_identity_transform; |
| is_identity_transform = colorMap->getColorSpace()->getMode() == csDeviceRGB || |
| (colorMap->getColorSpace()->getMode() == csICCBased && |
| ((GfxICCBasedColorSpace*)colorMap->getColorSpace())->getAlt()->getMode() == csDeviceRGB); |
| #endif |
| |
| /* TODO: Do we want to cache these? */ |
| imgStr = new ImageStream(str, width, colorMap->getNumPixelComps(), colorMap->getBits()); |
| imgStr->reset(); |
| |
| image = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height); |
| if (cairo_surface_status(image)) { |
| goto cleanup; |
| } |
| |
| buffer = cairo_image_surface_get_data(image); |
| row_stride = cairo_image_surface_get_stride(image); |
| for (y = 0; y < height; y++) { |
| dest = reinterpret_cast<unsigned int *>(buffer + y * row_stride); |
| pix = imgStr->getLine(); |
| if (likely(pix != nullptr)) { |
| colorMap->getRGBLine(pix, dest, width); |
| if (matteColor != nullptr) { |
| maskDest = (unsigned char *)(maskBuffer + y * mask_row_stride); |
| applyMask(dest, width, matteColorRgb, maskDest); |
| } |
| } |
| } |
| |
| filter = getFilterForSurface(image, interpolate); |
| |
| cairo_surface_mark_dirty(image); |
| |
| if (matteColor == nullptr) { |
| setMimeData(state, str, ref, colorMap, image, height); |
| } |
| |
| pattern = cairo_pattern_create_for_surface(image); |
| cairo_surface_destroy(image); |
| if (cairo_pattern_status(pattern)) { |
| goto cleanup; |
| } |
| |
| LOG(printf("drawSoftMaskedImage %dx%d\n", width, height)); |
| |
| cairo_pattern_set_filter(pattern, filter); |
| cairo_pattern_set_filter(maskPattern, maskFilter); |
| |
| if (!printing) { |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD); |
| cairo_pattern_set_extend(maskPattern, CAIRO_EXTEND_PAD); |
| } |
| |
| cairo_matrix_init_translate(&matrix, 0, height); |
| cairo_matrix_scale(&matrix, width, -height); |
| cairo_pattern_set_matrix(pattern, &matrix); |
| if (cairo_pattern_status(pattern)) { |
| cairo_pattern_destroy(pattern); |
| cairo_pattern_destroy(maskPattern); |
| goto cleanup; |
| } |
| |
| cairo_matrix_init_translate(&maskMatrix, 0, maskHeight); |
| cairo_matrix_scale(&maskMatrix, maskWidth, -maskHeight); |
| cairo_pattern_set_matrix(maskPattern, &maskMatrix); |
| if (cairo_pattern_status(maskPattern)) { |
| cairo_pattern_destroy(maskPattern); |
| cairo_pattern_destroy(pattern); |
| goto cleanup; |
| } |
| |
| if (fill_opacity != 1.0) { |
| cairo_push_group(cairo); |
| } else { |
| cairo_save(cairo); |
| } |
| |
| cairo_set_source(cairo, pattern); |
| if (!printing) { |
| cairo_rectangle(cairo, 0., 0., 1., 1.); |
| cairo_clip(cairo); |
| } |
| cairo_mask(cairo, maskPattern); |
| |
| if (fill_opacity != 1.0) { |
| cairo_pop_group_to_source(cairo); |
| cairo_save(cairo); |
| if (!printing) { |
| cairo_rectangle(cairo, 0., 0., 1., 1.); |
| cairo_clip(cairo); |
| } |
| cairo_paint_with_alpha(cairo, fill_opacity); |
| } |
| cairo_restore(cairo); |
| |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| cairo_set_source(cairo_shape, pattern); |
| if (!printing) { |
| cairo_rectangle(cairo_shape, 0., 0., 1., 1.); |
| cairo_fill(cairo_shape); |
| } else { |
| cairo_mask(cairo_shape, pattern); |
| } |
| cairo_restore(cairo_shape); |
| } |
| |
| cairo_pattern_destroy(maskPattern); |
| cairo_pattern_destroy(pattern); |
| |
| cleanup: |
| imgStr->close(); |
| delete imgStr; |
| } |
| |
| bool CairoOutputDev::getStreamData(Stream *str, char **buffer, int *length) |
| { |
| int len, i; |
| char *strBuffer; |
| |
| len = 0; |
| str->close(); |
| str->reset(); |
| while (str->getChar() != EOF) { |
| len++; |
| } |
| if (len == 0) { |
| return false; |
| } |
| |
| strBuffer = (char *)gmalloc(len); |
| |
| str->close(); |
| str->reset(); |
| for (i = 0; i < len; ++i) { |
| strBuffer[i] = str->getChar(); |
| } |
| |
| *buffer = strBuffer; |
| *length = len; |
| |
| return true; |
| } |
| |
| static bool colorMapHasIdentityDecodeMap(GfxImageColorMap *colorMap) |
| { |
| for (int i = 0; i < colorMap->getNumPixelComps(); i++) { |
| if (colorMap->getDecodeLow(i) != 0.0 || colorMap->getDecodeHigh(i) != 1.0) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| static cairo_status_t setMimeIdFromRef(cairo_surface_t *surface, const char *mime_type, const char *mime_id_prefix, Ref ref) |
| { |
| GooString *mime_id; |
| char *idBuffer; |
| cairo_status_t status; |
| |
| mime_id = new GooString; |
| |
| if (mime_id_prefix) { |
| mime_id->append(mime_id_prefix); |
| } |
| |
| mime_id->appendf("{0:d}-{1:d}", ref.gen, ref.num); |
| |
| idBuffer = copyString(mime_id->c_str()); |
| status = cairo_surface_set_mime_data(surface, mime_type, (const unsigned char *)idBuffer, mime_id->getLength(), gfree, idBuffer); |
| delete mime_id; |
| if (status) { |
| gfree(idBuffer); |
| } |
| return status; |
| } |
| |
| bool CairoOutputDev::setMimeDataForJBIG2Globals(Stream *str, cairo_surface_t *image) |
| { |
| JBIG2Stream *jb2Str = static_cast<JBIG2Stream *>(str); |
| Object *globalsStr = jb2Str->getGlobalsStream(); |
| char *globalsBuffer; |
| int globalsLength; |
| |
| // nothing to do for JBIG2 stream without Globals |
| if (!globalsStr->isStream()) { |
| return true; |
| } |
| |
| if (setMimeIdFromRef(image, CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID, nullptr, jb2Str->getGlobalsStreamRef())) { |
| return false; |
| } |
| |
| if (!getStreamData(globalsStr->getStream(), &globalsBuffer, &globalsLength)) { |
| return false; |
| } |
| |
| if (cairo_surface_set_mime_data(image, CAIRO_MIME_TYPE_JBIG2_GLOBAL, (const unsigned char *)globalsBuffer, globalsLength, gfree, (void *)globalsBuffer)) { |
| gfree(globalsBuffer); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool CairoOutputDev::setMimeDataForCCITTParams(Stream *str, cairo_surface_t *image, int height) |
| { |
| CCITTFaxStream *ccittStr = static_cast<CCITTFaxStream *>(str); |
| |
| GooString params; |
| params.appendf("Columns={0:d}", ccittStr->getColumns()); |
| params.appendf(" Rows={0:d}", height); |
| params.appendf(" K={0:d}", ccittStr->getEncoding()); |
| params.appendf(" EndOfLine={0:d}", ccittStr->getEndOfLine() ? 1 : 0); |
| params.appendf(" EncodedByteAlign={0:d}", ccittStr->getEncodedByteAlign() ? 1 : 0); |
| params.appendf(" EndOfBlock={0:d}", ccittStr->getEndOfBlock() ? 1 : 0); |
| params.appendf(" BlackIs1={0:d}", ccittStr->getBlackIs1() ? 1 : 0); |
| params.appendf(" DamagedRowsBeforeError={0:d}", ccittStr->getDamagedRowsBeforeError()); |
| |
| char *p = strdup(params.c_str()); |
| if (cairo_surface_set_mime_data(image, CAIRO_MIME_TYPE_CCITT_FAX_PARAMS, (const unsigned char *)p, params.getLength(), gfree, (void *)p)) { |
| gfree(p); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void CairoOutputDev::setMimeData(GfxState *state, Stream *str, Object *ref, GfxImageColorMap *colorMap, cairo_surface_t *image, int height) |
| { |
| char *strBuffer; |
| int len; |
| Object obj; |
| StreamKind strKind = str->getKind(); |
| const char *mime_type; |
| cairo_status_t status; |
| |
| if (!printing) { |
| return; |
| } |
| |
| // The cairo PS backend stores images with UNIQUE_ID in PS memory so the |
| // image can be re-used multiple times. As we don't know how large the images are or |
| // how many times they are used, there is no benefit in enabling this. Issue #106 |
| if (cairo_surface_get_type(cairo_get_target(cairo)) != CAIRO_SURFACE_TYPE_PS) { |
| if (ref && ref->isRef()) { |
| status = setMimeIdFromRef(image, CAIRO_MIME_TYPE_UNIQUE_ID, "poppler-surface-", ref->getRef()); |
| if (status) { |
| return; |
| } |
| } |
| } |
| |
| switch (strKind) { |
| case strDCT: |
| mime_type = CAIRO_MIME_TYPE_JPEG; |
| break; |
| case strJPX: |
| mime_type = CAIRO_MIME_TYPE_JP2; |
| break; |
| case strJBIG2: |
| mime_type = CAIRO_MIME_TYPE_JBIG2; |
| break; |
| case strCCITTFax: |
| mime_type = CAIRO_MIME_TYPE_CCITT_FAX; |
| break; |
| default: |
| mime_type = nullptr; |
| break; |
| } |
| |
| obj = str->getDict()->lookup("ColorSpace"); |
| std::unique_ptr<GfxColorSpace> colorSpace = GfxColorSpace::parse(nullptr, &obj, this, state); |
| |
| // colorspace in stream dict may be different from colorspace in jpx |
| // data |
| if (strKind == strJPX && colorSpace) { |
| return; |
| } |
| |
| // only embed mime data for gray, rgb, and cmyk colorspaces. |
| if (colorSpace) { |
| GfxColorSpaceMode mode = colorSpace->getMode(); |
| switch (mode) { |
| case csDeviceGray: |
| case csCalGray: |
| case csDeviceRGB: |
| case csCalRGB: |
| case csDeviceCMYK: |
| case csICCBased: |
| break; |
| |
| case csLab: |
| case csIndexed: |
| case csSeparation: |
| case csDeviceN: |
| case csPattern: |
| return; |
| } |
| } |
| |
| if (!colorMapHasIdentityDecodeMap(colorMap)) { |
| return; |
| } |
| |
| if (strKind == strJBIG2 && !setMimeDataForJBIG2Globals(str, image)) { |
| return; |
| } |
| |
| if (strKind == strCCITTFax && !setMimeDataForCCITTParams(str, image, height)) { |
| return; |
| } |
| |
| if (mime_type) { |
| if (getStreamData(str->getNextStream(), &strBuffer, &len)) { |
| status = cairo_surface_set_mime_data(image, mime_type, (const unsigned char *)strBuffer, len, gfree, strBuffer); |
| } |
| |
| if (status) { |
| gfree(strBuffer); |
| } |
| } |
| } |
| |
| class RescaleDrawImage : public CairoRescaleBox |
| { |
| private: |
| ImageStream *imgStr; |
| GfxRGB *lookup; |
| int width; |
| GfxImageColorMap *colorMap; |
| const int *maskColors; |
| int current_row; |
| bool imageError; |
| |
| public: |
| ~RescaleDrawImage() override; |
| cairo_surface_t *getSourceImage(Stream *str, int widthA, int height, int scaledWidth, int scaledHeight, bool printing, GfxImageColorMap *colorMapA, const int *maskColorsA) |
| { |
| cairo_surface_t *image = nullptr; |
| int i; |
| |
| lookup = nullptr; |
| colorMap = colorMapA; |
| maskColors = maskColorsA; |
| width = widthA; |
| current_row = -1; |
| imageError = false; |
| |
| /* TODO: Do we want to cache these? */ |
| imgStr = new ImageStream(str, width, colorMap->getNumPixelComps(), colorMap->getBits()); |
| imgStr->reset(); |
| |
| #if 0 |
| /* ICCBased color space doesn't do any color correction |
| * so check its underlying color space as well */ |
| int is_identity_transform; |
| is_identity_transform = colorMap->getColorSpace()->getMode() == csDeviceRGB || |
| (colorMap->getColorSpace()->getMode() == csICCBased && |
| ((GfxICCBasedColorSpace*)colorMap->getColorSpace())->getAlt()->getMode() == csDeviceRGB); |
| #endif |
| |
| // special case for one-channel (monochrome/gray/separation) images: |
| // build a lookup table here |
| if (colorMap->getNumPixelComps() == 1) { |
| int n; |
| unsigned char pix; |
| |
| n = 1 << colorMap->getBits(); |
| lookup = (GfxRGB *)gmallocn(n, sizeof(GfxRGB)); |
| for (i = 0; i < n; ++i) { |
| pix = (unsigned char)i; |
| |
| colorMap->getRGB(&pix, &lookup[i]); |
| } |
| } |
| |
| bool needsCustomDownscaling = (width > MAX_CAIRO_IMAGE_SIZE || height > MAX_CAIRO_IMAGE_SIZE); |
| |
| if (printing) { |
| if (width > MAX_PRINT_IMAGE_SIZE || height > MAX_PRINT_IMAGE_SIZE) { |
| if (width > height) { |
| scaledWidth = MAX_PRINT_IMAGE_SIZE; |
| scaledHeight = MAX_PRINT_IMAGE_SIZE * (double)height / width; |
| } else { |
| scaledHeight = MAX_PRINT_IMAGE_SIZE; |
| scaledWidth = MAX_PRINT_IMAGE_SIZE * (double)width / height; |
| } |
| needsCustomDownscaling = true; |
| |
| if (scaledWidth == 0) { |
| scaledWidth = 1; |
| } |
| if (scaledHeight == 0) { |
| scaledHeight = 1; |
| } |
| } |
| } |
| |
| if (!needsCustomDownscaling || scaledWidth >= width || scaledHeight >= height) { |
| // No downscaling. Create cairo image containing the source image data. |
| unsigned char *buffer; |
| ptrdiff_t stride; |
| |
| image = cairo_image_surface_create(maskColors ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, width, height); |
| if (cairo_surface_status(image)) { |
| goto cleanup; |
| } |
| |
| buffer = cairo_image_surface_get_data(image); |
| stride = cairo_image_surface_get_stride(image); |
| for (int y = 0; y < height; y++) { |
| uint32_t *dest = reinterpret_cast<uint32_t *>(buffer + y * stride); |
| getRow(y, dest); |
| } |
| } else { |
| // Downscaling required. Create cairo image the size of the |
| // rescaled image and downscale the source image data into |
| // the cairo image. downScaleImage() will call getRow() to read |
| // source image data from the image stream. This avoids having |
| // to create an image the size of the source image which may |
| // exceed cairo's 32767x32767 image size limit (and also saves a |
| // lot of memory). |
| image = cairo_image_surface_create(maskColors ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, scaledWidth, scaledHeight); |
| if (cairo_surface_status(image)) { |
| goto cleanup; |
| } |
| |
| downScaleImage(width, height, scaledWidth, scaledHeight, 0, 0, scaledWidth, scaledHeight, image); |
| } |
| cairo_surface_mark_dirty(image); |
| |
| cleanup: |
| gfree(lookup); |
| imgStr->close(); |
| delete imgStr; |
| return image; |
| } |
| |
| void getRow(int row_num, uint32_t *row_data) override |
| { |
| unsigned char *pix; |
| |
| if (row_num <= current_row) { |
| return; |
| } |
| |
| while (current_row < row_num) { |
| pix = imgStr->getLine(); |
| current_row++; |
| } |
| |
| if (unlikely(pix == nullptr)) { |
| memset(row_data, 0, width * 4); |
| if (!imageError) { |
| error(errInternal, -1, "Bad image stream"); |
| imageError = true; |
| } |
| } else if (lookup) { |
| unsigned char *p = pix; |
| GfxRGB rgb; |
| |
| for (int i = 0; i < width; i++) { |
| rgb = lookup[*p]; |
| row_data[i] = ((int)colToByte(rgb.r) << 16) | ((int)colToByte(rgb.g) << 8) | ((int)colToByte(rgb.b) << 0); |
| p++; |
| } |
| } else { |
| colorMap->getRGBLine(pix, row_data, width); |
| } |
| |
| if (maskColors) { |
| for (int x = 0; x < width; x++) { |
| bool is_opaque = false; |
| for (int i = 0; i < colorMap->getNumPixelComps(); ++i) { |
| if (pix[i] < maskColors[2 * i] || pix[i] > maskColors[2 * i + 1]) { |
| is_opaque = true; |
| break; |
| } |
| } |
| if (is_opaque) { |
| *row_data |= 0xff000000; |
| } else { |
| *row_data = 0; |
| } |
| row_data++; |
| pix += colorMap->getNumPixelComps(); |
| } |
| } |
| } |
| }; |
| |
| RescaleDrawImage::~RescaleDrawImage() = default; |
| |
| void CairoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str, int widthA, int heightA, GfxImageColorMap *colorMap, bool interpolate, const int *maskColors, bool inlineImg) |
| { |
| cairo_surface_t *image; |
| cairo_pattern_t *pattern, *maskPattern; |
| cairo_matrix_t matrix; |
| int width, height; |
| int scaledWidth, scaledHeight; |
| cairo_filter_t filter = CAIRO_FILTER_GOOD; |
| RescaleDrawImage rescale; |
| |
| LOG(printf("drawImage %dx%d\n", widthA, heightA)); |
| |
| cairo_get_matrix(cairo, &matrix); |
| getScaledSize(&matrix, widthA, heightA, &scaledWidth, &scaledHeight); |
| image = rescale.getSourceImage(str, widthA, heightA, scaledWidth, scaledHeight, printing, colorMap, maskColors); |
| if (!image) { |
| return; |
| } |
| |
| width = cairo_image_surface_get_width(image); |
| height = cairo_image_surface_get_height(image); |
| if (width == widthA && height == heightA) { |
| filter = getFilterForSurface(image, interpolate); |
| } |
| |
| if (!inlineImg) { /* don't read stream twice if it is an inline image */ |
| setMimeData(state, str, ref, colorMap, image, heightA); |
| } |
| |
| pattern = cairo_pattern_create_for_surface(image); |
| cairo_surface_destroy(image); |
| if (cairo_pattern_status(pattern)) { |
| return; |
| } |
| |
| cairo_pattern_set_filter(pattern, filter); |
| |
| if (!printing) { |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD); |
| } |
| |
| cairo_matrix_init_translate(&matrix, 0, height); |
| cairo_matrix_scale(&matrix, width, -height); |
| cairo_pattern_set_matrix(pattern, &matrix); |
| if (cairo_pattern_status(pattern)) { |
| cairo_pattern_destroy(pattern); |
| return; |
| } |
| |
| if (!mask && fill_opacity != 1.0) { |
| maskPattern = cairo_pattern_create_rgba(1., 1., 1., fill_opacity); |
| } else if (mask) { |
| maskPattern = cairo_pattern_reference(mask); |
| } else { |
| maskPattern = nullptr; |
| } |
| |
| cairo_save(cairo); |
| cairo_set_source(cairo, pattern); |
| if (!printing) { |
| cairo_rectangle(cairo, 0., 0., 1., 1.); |
| } |
| if (maskPattern) { |
| if (!printing) { |
| cairo_clip(cairo); |
| } |
| if (mask) { |
| cairo_set_matrix(cairo, &mask_matrix); |
| } |
| cairo_mask(cairo, maskPattern); |
| } else { |
| if (printing) { |
| cairo_paint(cairo); |
| } else { |
| cairo_fill(cairo); |
| } |
| } |
| cairo_restore(cairo); |
| |
| cairo_pattern_destroy(maskPattern); |
| |
| if (cairo_shape) { |
| cairo_save(cairo_shape); |
| cairo_set_source(cairo_shape, pattern); |
| if (printing) { |
| cairo_paint(cairo_shape); |
| } else { |
| cairo_rectangle(cairo_shape, 0., 0., 1., 1.); |
| cairo_fill(cairo_shape); |
| } |
| cairo_restore(cairo_shape); |
| } |
| |
| cairo_pattern_destroy(pattern); |
| } |
| |
| void CairoOutputDev::beginMarkedContent(const char *name, Dict *properties) |
| { |
| if (!logicalStruct || !isPDF()) { |
| return; |
| } |
| |
| if (strcmp(name, "Artifact") == 0) { |
| markedContentStack.emplace_back(name); |
| #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 18, 0) |
| cairo_tag_begin(cairo, name, nullptr); |
| #endif |
| return; |
| } |
| |
| int mcid = -1; |
| if (properties) { |
| properties->lookupInt("MCID", nullptr, &mcid); |
| } |
| |
| if (mcid == -1) { |
| return; |
| } |
| |
| GooString attribs; |
| attribs.appendf("tag_name='{0:s}' id='{1:d}_{2:d}'", name, currentStructParents, mcid); |
| mcidEmitted.insert(std::pair<int, int>(currentStructParents, mcid)); |
| |
| std::string tag; |
| #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 18, 0) |
| tag = CAIRO_TAG_CONTENT; |
| cairo_tag_begin(cairo, CAIRO_TAG_CONTENT, attribs.c_str()); |
| #endif |
| |
| markedContentStack.push_back(tag); |
| } |
| |
| void CairoOutputDev::endMarkedContent(GfxState *state) |
| { |
| if (!logicalStruct || !isPDF()) { |
| return; |
| } |
| |
| if (markedContentStack.size() == 0) { |
| return; |
| } |
| |
| #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 18, 0) |
| cairo_tag_end(cairo, markedContentStack.back().c_str()); |
| #endif |
| markedContentStack.pop_back(); |
| } |
| |
| //------------------------------------------------------------------------ |
| // ImageOutputDev |
| //------------------------------------------------------------------------ |
| |
| CairoImageOutputDev::CairoImageOutputDev() |
| { |
| images = nullptr; |
| numImages = 0; |
| size = 0; |
| imgDrawCbk = nullptr; |
| imgDrawCbkData = nullptr; |
| } |
| |
| CairoImageOutputDev::~CairoImageOutputDev() |
| { |
| int i; |
| |
| for (i = 0; i < numImages; i++) { |
| delete images[i]; |
| } |
| gfree(images); |
| } |
| |
| void CairoImageOutputDev::saveImage(CairoImage *image) |
| { |
| if (numImages >= size) { |
| size += 16; |
| images = (CairoImage **)greallocn(images, size, sizeof(CairoImage *)); |
| } |
| images[numImages++] = image; |
| } |
| |
| void CairoImageOutputDev::getBBox(GfxState *state, int width, int height, double *x1, double *y1, double *x2, double *y2) |
| { |
| const double *ctm = state->getCTM(); |
| cairo_matrix_t matrix; |
| cairo_matrix_init(&matrix, ctm[0], ctm[1], -ctm[2], -ctm[3], ctm[2] + ctm[4], ctm[3] + ctm[5]); |
| |
| int scaledWidth, scaledHeight; |
| getScaledSize(&matrix, width, height, &scaledWidth, &scaledHeight); |
| |
| if (matrix.xx >= 0) { |
| *x1 = matrix.x0; |
| } else { |
| *x1 = matrix.x0 - scaledWidth; |
| } |
| *x2 = *x1 + scaledWidth; |
| |
| if (matrix.yy >= 0) { |
| *y1 = matrix.y0; |
| } else { |
| *y1 = matrix.y0 - scaledHeight; |
| } |
| *y2 = *y1 + scaledHeight; |
| } |
| |
| void CairoImageOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str, int width, int height, bool invert, bool interpolate, bool inlineImg) |
| { |
| cairo_t *cr; |
| cairo_surface_t *surface; |
| double x1, y1, x2, y2; |
| CairoImage *image; |
| |
| getBBox(state, width, height, &x1, &y1, &x2, &y2); |
| |
| image = new CairoImage(x1, y1, x2, y2); |
| saveImage(image); |
| |
| if (imgDrawCbk && imgDrawCbk(numImages - 1, imgDrawCbkData)) { |
| surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height); |
| cr = cairo_create(surface); |
| setCairo(cr); |
| cairo_translate(cr, 0, height); |
| cairo_scale(cr, width, -height); |
| |
| CairoOutputDev::drawImageMask(state, ref, str, width, height, invert, interpolate, inlineImg); |
| image->setImage(surface); |
| |
| setCairo(nullptr); |
| cairo_surface_destroy(surface); |
| cairo_destroy(cr); |
| } |
| } |
| |
| void CairoImageOutputDev::setSoftMaskFromImageMask(GfxState *state, Object *ref, Stream *str, int width, int height, bool invert, bool inlineImg, double *baseMatrix) |
| { |
| cairo_t *cr; |
| cairo_surface_t *surface; |
| double x1, y1, x2, y2; |
| CairoImage *image; |
| |
| getBBox(state, width, height, &x1, &y1, &x2, &y2); |
| |
| image = new CairoImage(x1, y1, x2, y2); |
| saveImage(image); |
| |
| if (imgDrawCbk && imgDrawCbk(numImages - 1, imgDrawCbkData)) { |
| surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height); |
| cr = cairo_create(surface); |
| setCairo(cr); |
| cairo_translate(cr, 0, height); |
| cairo_scale(cr, width, -height); |
| |
| CairoOutputDev::drawImageMask(state, ref, str, width, height, invert, inlineImg, false); |
| if (state->getFillColorSpace()->getMode() == csPattern) { |
| cairo_mask(cairo, mask); |
| } |
| image->setImage(surface); |
| |
| setCairo(nullptr); |
| cairo_surface_destroy(surface); |
| cairo_destroy(cr); |
| } |
| } |
| |
| void CairoImageOutputDev::drawImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, bool interpolate, const int *maskColors, bool inlineImg) |
| { |
| cairo_t *cr; |
| cairo_surface_t *surface; |
| double x1, y1, x2, y2; |
| CairoImage *image; |
| |
| getBBox(state, width, height, &x1, &y1, &x2, &y2); |
| |
| image = new CairoImage(x1, y1, x2, y2); |
| saveImage(image); |
| |
| if (imgDrawCbk && imgDrawCbk(numImages - 1, imgDrawCbkData)) { |
| surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height); |
| cr = cairo_create(surface); |
| setCairo(cr); |
| cairo_translate(cr, 0, height); |
| cairo_scale(cr, width, -height); |
| |
| CairoOutputDev::drawImage(state, ref, str, width, height, colorMap, interpolate, maskColors, inlineImg); |
| image->setImage(surface); |
| |
| setCairo(nullptr); |
| cairo_surface_destroy(surface); |
| cairo_destroy(cr); |
| } |
| } |
| |
| void CairoImageOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, bool interpolate, Stream *maskStr, int maskWidth, int maskHeight, GfxImageColorMap *maskColorMap, |
| bool maskInterpolate) |
| { |
| cairo_t *cr; |
| cairo_surface_t *surface; |
| double x1, y1, x2, y2; |
| CairoImage *image; |
| |
| getBBox(state, width, height, &x1, &y1, &x2, &y2); |
| |
| image = new CairoImage(x1, y1, x2, y2); |
| saveImage(image); |
| |
| if (imgDrawCbk && imgDrawCbk(numImages - 1, imgDrawCbkData)) { |
| surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height); |
| cr = cairo_create(surface); |
| setCairo(cr); |
| cairo_translate(cr, 0, height); |
| cairo_scale(cr, width, -height); |
| |
| CairoOutputDev::drawSoftMaskedImage(state, ref, str, width, height, colorMap, interpolate, maskStr, maskWidth, maskHeight, maskColorMap, maskInterpolate); |
| image->setImage(surface); |
| |
| setCairo(nullptr); |
| cairo_surface_destroy(surface); |
| cairo_destroy(cr); |
| } |
| } |
| |
| void CairoImageOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, bool interpolate, Stream *maskStr, int maskWidth, int maskHeight, bool maskInvert, bool maskInterpolate) |
| { |
| cairo_t *cr; |
| cairo_surface_t *surface; |
| double x1, y1, x2, y2; |
| CairoImage *image; |
| |
| getBBox(state, width, height, &x1, &y1, &x2, &y2); |
| |
| image = new CairoImage(x1, y1, x2, y2); |
| saveImage(image); |
| |
| if (imgDrawCbk && imgDrawCbk(numImages - 1, imgDrawCbkData)) { |
| surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height); |
| cr = cairo_create(surface); |
| setCairo(cr); |
| cairo_translate(cr, 0, height); |
| cairo_scale(cr, width, -height); |
| |
| CairoOutputDev::drawMaskedImage(state, ref, str, width, height, colorMap, interpolate, maskStr, maskWidth, maskHeight, maskInvert, maskInterpolate); |
| image->setImage(surface); |
| |
| setCairo(nullptr); |
| cairo_surface_destroy(surface); |
| cairo_destroy(cr); |
| } |
| } |
