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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/core/SkDevice.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkDrawable.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkPathMeasure.h"
#include "include/core/SkRSXform.h"
#include "include/core/SkShader.h"
#include "include/core/SkVertices.h"
#include "include/private/SkTo.h"
#include "src/core/SkDraw.h"
#include "src/core/SkGlyphRun.h"
#include "src/core/SkImageFilterCache.h"
#include "src/core/SkImagePriv.h"
#include "src/core/SkLatticeIter.h"
#include "src/core/SkMakeUnique.h"
#include "src/core/SkMatrixPriv.h"
#include "src/core/SkPathPriv.h"
#include "src/core/SkRasterClip.h"
#include "src/core/SkSpecialImage.h"
#include "src/core/SkTLazy.h"
#include "src/core/SkTextBlobPriv.h"
#include "src/core/SkUtils.h"
#include "src/image/SkImage_Base.h"
#include "src/shaders/SkLocalMatrixShader.h"
#include "src/utils/SkPatchUtils.h"
SkBaseDevice::SkBaseDevice(const SkImageInfo& info, const SkSurfaceProps& surfaceProps)
: fInfo(info)
, fSurfaceProps(surfaceProps)
{
fOrigin = {0, 0};
fCTM.reset();
}
void SkBaseDevice::setOrigin(const SkMatrix& globalCTM, int x, int y) {
fOrigin.set(x, y);
fCTM = globalCTM;
fCTM.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y));
}
void SkBaseDevice::setGlobalCTM(const SkMatrix& ctm) {
fCTM = ctm;
if (fOrigin.fX | fOrigin.fY) {
fCTM.postTranslate(-SkIntToScalar(fOrigin.fX), -SkIntToScalar(fOrigin.fY));
}
}
bool SkBaseDevice::clipIsWideOpen() const {
if (ClipType::kRect == this->onGetClipType()) {
SkRegion rgn;
this->onAsRgnClip(&rgn);
SkASSERT(rgn.isRect());
return rgn.getBounds() == SkIRect::MakeWH(this->width(), this->height());
} else {
return false;
}
}
SkPixelGeometry SkBaseDevice::CreateInfo::AdjustGeometry(TileUsage tileUsage, SkPixelGeometry geo) {
switch (tileUsage) {
case kPossible_TileUsage:
// (we think) for compatibility with old clients, we assume this layer can support LCD
// even though they may not have marked it as opaque... seems like we should update
// our callers (reed/robertphilips).
break;
case kNever_TileUsage:
geo = kUnknown_SkPixelGeometry;
break;
}
return geo;
}
static inline bool is_int(float x) {
return x == (float) sk_float_round2int(x);
}
void SkBaseDevice::drawRegion(const SkRegion& region, const SkPaint& paint) {
const SkMatrix& ctm = this->ctm();
bool isNonTranslate = ctm.getType() & ~(SkMatrix::kTranslate_Mask);
bool complexPaint = paint.getStyle() != SkPaint::kFill_Style || paint.getMaskFilter() ||
paint.getPathEffect();
bool antiAlias = paint.isAntiAlias() && (!is_int(ctm.getTranslateX()) ||
!is_int(ctm.getTranslateY()));
if (isNonTranslate || complexPaint || antiAlias) {
SkPath path;
region.getBoundaryPath(&path);
path.setIsVolatile(true);
return this->drawPath(path, paint, true);
}
SkRegion::Iterator it(region);
while (!it.done()) {
this->drawRect(SkRect::Make(it.rect()), paint);
it.next();
}
}
void SkBaseDevice::drawArc(const SkRect& oval, SkScalar startAngle,
SkScalar sweepAngle, bool useCenter, const SkPaint& paint) {
SkPath path;
bool isFillNoPathEffect = SkPaint::kFill_Style == paint.getStyle() && !paint.getPathEffect();
SkPathPriv::CreateDrawArcPath(&path, oval, startAngle, sweepAngle, useCenter,
isFillNoPathEffect);
this->drawPath(path, paint);
}
void SkBaseDevice::drawDRRect(const SkRRect& outer,
const SkRRect& inner, const SkPaint& paint) {
SkPath path;
path.addRRect(outer);
path.addRRect(inner);
path.setFillType(SkPath::kEvenOdd_FillType);
path.setIsVolatile(true);
this->drawPath(path, paint, true);
}
void SkBaseDevice::drawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkBlendMode bmode, const SkPaint& paint) {
SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &this->ctm());
auto vertices = SkPatchUtils::MakeVertices(cubics, colors, texCoords, lod.width(), lod.height(),
this->imageInfo().colorSpace());
if (vertices) {
this->drawVertices(vertices.get(), nullptr, 0, bmode, paint);
}
}
void SkBaseDevice::drawImageRect(const SkImage* image, const SkRect* src,
const SkRect& dst, const SkPaint& paint,
SkCanvas::SrcRectConstraint constraint) {
SkBitmap bm;
if (as_IB(image)->getROPixels(&bm)) {
this->drawBitmapRect(bm, src, dst, paint, constraint);
}
}
void SkBaseDevice::drawImageNine(const SkImage* image, const SkIRect& center,
const SkRect& dst, const SkPaint& paint) {
SkLatticeIter iter(image->width(), image->height(), center, dst);
SkRect srcR, dstR;
while (iter.next(&srcR, &dstR)) {
this->drawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
}
}
void SkBaseDevice::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint& paint) {
SkLatticeIter iter(bitmap.width(), bitmap.height(), center, dst);
SkRect srcR, dstR;
while (iter.next(&srcR, &dstR)) {
this->drawBitmapRect(bitmap, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
}
}
void SkBaseDevice::drawImageLattice(const SkImage* image,
const SkCanvas::Lattice& lattice, const SkRect& dst,
const SkPaint& paint) {
SkLatticeIter iter(lattice, dst);
SkRect srcR, dstR;
SkColor c;
bool isFixedColor = false;
const SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType);
while (iter.next(&srcR, &dstR, &isFixedColor, &c)) {
if (isFixedColor || (srcR.width() <= 1.0f && srcR.height() <= 1.0f &&
image->readPixels(info, &c, 4, srcR.fLeft, srcR.fTop))) {
// Fast draw with drawRect, if this is a patch containing a single color
// or if this is a patch containing a single pixel.
if (0 != c || !paint.isSrcOver()) {
SkPaint paintCopy(paint);
int alpha = SkAlphaMul(SkColorGetA(c), SkAlpha255To256(paint.getAlpha()));
paintCopy.setColor(SkColorSetA(c, alpha));
this->drawRect(dstR, paintCopy);
}
} else {
this->drawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
}
}
}
void SkBaseDevice::drawBitmapLattice(const SkBitmap& bitmap,
const SkCanvas::Lattice& lattice, const SkRect& dst,
const SkPaint& paint) {
SkLatticeIter iter(lattice, dst);
SkRect srcR, dstR;
while (iter.next(&srcR, &dstR)) {
this->drawBitmapRect(bitmap, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
}
}
static SkPoint* quad_to_tris(SkPoint tris[6], const SkPoint quad[4]) {
tris[0] = quad[0];
tris[1] = quad[1];
tris[2] = quad[2];
tris[3] = quad[0];
tris[4] = quad[2];
tris[5] = quad[3];
return tris + 6;
}
void SkBaseDevice::drawAtlas(const SkImage* atlas, const SkRSXform xform[],
const SkRect tex[], const SkColor colors[], int quadCount,
SkBlendMode mode, const SkPaint& paint) {
const int triCount = quadCount << 1;
const int vertexCount = triCount * 3;
uint32_t flags = SkVertices::kHasTexCoords_BuilderFlag;
if (colors) {
flags |= SkVertices::kHasColors_BuilderFlag;
}
SkVertices::Builder builder(SkVertices::kTriangles_VertexMode, vertexCount, 0, flags);
SkPoint* vPos = builder.positions();
SkPoint* vTex = builder.texCoords();
SkColor* vCol = builder.colors();
for (int i = 0; i < quadCount; ++i) {
SkPoint tmp[4];
xform[i].toQuad(tex[i].width(), tex[i].height(), tmp);
vPos = quad_to_tris(vPos, tmp);
tex[i].toQuad(tmp);
vTex = quad_to_tris(vTex, tmp);
if (colors) {
sk_memset32(vCol, colors[i], 6);
vCol += 6;
}
}
SkPaint p(paint);
p.setShader(atlas->makeShader());
this->drawVertices(builder.detach().get(), nullptr, 0, mode, p);
}
void SkBaseDevice::drawEdgeAAQuad(const SkRect& r, const SkPoint clip[4], SkCanvas::QuadAAFlags aa,
const SkColor4f& color, SkBlendMode mode) {
SkPaint paint;
paint.setColor4f(color);
paint.setBlendMode(mode);
paint.setAntiAlias(aa == SkCanvas::kAll_QuadAAFlags);
if (clip) {
// Draw the clip directly as a quad since it's a filled color with no local coords
SkPath clipPath;
clipPath.addPoly(clip, 4, true);
this->drawPath(clipPath, paint);
} else {
this->drawRect(r, paint);
}
}
void SkBaseDevice::drawEdgeAAImageSet(const SkCanvas::ImageSetEntry images[], int count,
const SkPoint dstClips[], const SkMatrix preViewMatrices[],
const SkPaint& paint,
SkCanvas::SrcRectConstraint constraint) {
SkASSERT(paint.getStyle() == SkPaint::kFill_Style);
SkASSERT(!paint.getPathEffect());
SkPaint entryPaint = paint;
const SkMatrix baseCTM = this->ctm();
int clipIndex = 0;
for (int i = 0; i < count; ++i) {
// TODO: Handle per-edge AA. Right now this mirrors the SkiaRenderer component of Chrome
// which turns off antialiasing unless all four edges should be antialiased. This avoids
// seaming in tiled composited layers.
entryPaint.setAntiAlias(images[i].fAAFlags == SkCanvas::kAll_QuadAAFlags);
entryPaint.setAlphaf(paint.getAlphaf() * images[i].fAlpha);
bool needsRestore = false;
SkASSERT(images[i].fMatrixIndex < 0 || preViewMatrices);
if (images[i].fMatrixIndex >= 0) {
this->save();
this->setGlobalCTM(SkMatrix::Concat(
baseCTM, preViewMatrices[images[i].fMatrixIndex]));
needsRestore = true;
}
SkASSERT(!images[i].fHasClip || dstClips);
if (images[i].fHasClip) {
// Since drawImageRect requires a srcRect, the dst clip is implemented as a true clip
if (!needsRestore) {
this->save();
needsRestore = true;
}
SkPath clipPath;
clipPath.addPoly(dstClips + clipIndex, 4, true);
this->clipPath(clipPath, SkClipOp::kIntersect, entryPaint.isAntiAlias());
clipIndex += 4;
}
this->drawImageRect(images[i].fImage.get(), &images[i].fSrcRect, images[i].fDstRect,
entryPaint, constraint);
if (needsRestore) {
this->restore(baseCTM);
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
void SkBaseDevice::drawDrawable(SkDrawable* drawable, const SkMatrix* matrix, SkCanvas* canvas) {
drawable->draw(canvas, matrix);
}
///////////////////////////////////////////////////////////////////////////////////////////////////
void SkBaseDevice::drawSpecial(SkSpecialImage*, int x, int y, const SkPaint&,
SkImage*, const SkMatrix&) {}
sk_sp<SkSpecialImage> SkBaseDevice::makeSpecial(const SkBitmap&) { return nullptr; }
sk_sp<SkSpecialImage> SkBaseDevice::makeSpecial(const SkImage*) { return nullptr; }
sk_sp<SkSpecialImage> SkBaseDevice::snapSpecial(const SkIRect&, bool) { return nullptr; }
sk_sp<SkSpecialImage> SkBaseDevice::snapSpecial() {
return this->snapSpecial(SkIRect::MakeWH(this->width(), this->height()));
}
///////////////////////////////////////////////////////////////////////////////////////////////////
bool SkBaseDevice::readPixels(const SkPixmap& pm, int x, int y) {
return this->onReadPixels(pm, x, y);
}
bool SkBaseDevice::writePixels(const SkPixmap& pm, int x, int y) {
return this->onWritePixels(pm, x, y);
}
bool SkBaseDevice::onWritePixels(const SkPixmap&, int, int) {
return false;
}
bool SkBaseDevice::onReadPixels(const SkPixmap&, int x, int y) {
return false;
}
bool SkBaseDevice::accessPixels(SkPixmap* pmap) {
SkPixmap tempStorage;
if (nullptr == pmap) {
pmap = &tempStorage;
}
return this->onAccessPixels(pmap);
}
bool SkBaseDevice::peekPixels(SkPixmap* pmap) {
SkPixmap tempStorage;
if (nullptr == pmap) {
pmap = &tempStorage;
}
return this->onPeekPixels(pmap);
}
//////////////////////////////////////////////////////////////////////////////////////////
#include "src/core/SkUtils.h"
void SkBaseDevice::drawGlyphRunRSXform(const SkFont& font, const SkGlyphID glyphs[],
const SkRSXform xform[], int count, SkPoint origin,
const SkPaint& paint) {
const SkMatrix originalCTM = this->ctm();
if (!originalCTM.isFinite() || !SkScalarIsFinite(font.getSize()) ||
!SkScalarIsFinite(font.getScaleX()) ||
!SkScalarIsFinite(font.getSkewX())) {
return;
}
SkPoint sharedPos{0, 0}; // we're at the origin
SkGlyphID glyphID;
SkGlyphRun glyphRun{
font,
SkSpan<const SkPoint>{&sharedPos, 1},
SkSpan<const SkGlyphID>{&glyphID, 1},
SkSpan<const char>{},
SkSpan<const uint32_t>{}
};
for (int i = 0; i < count; i++) {
glyphID = glyphs[i];
// now "glyphRun" is pointing at the current glyphID
SkMatrix ctm;
ctm.setRSXform(xform[i]).postTranslate(origin.fX, origin.fY);
// We want to rotate each glyph by the rsxform, but we don't want to rotate "space"
// (i.e. the shader that cares about the ctm) so we have to undo our little ctm trick
// with a localmatrixshader so that the shader draws as if there was no change to the ctm.
SkPaint transformingPaint{paint};
auto shader = transformingPaint.getShader();
if (shader) {
SkMatrix inverse;
if (ctm.invert(&inverse)) {
transformingPaint.setShader(shader->makeWithLocalMatrix(inverse));
} else {
transformingPaint.setShader(nullptr); // can't handle this xform
}
}
ctm.setConcat(originalCTM, ctm);
this->setCTM(ctm);
this->drawGlyphRunList(SkGlyphRunList{glyphRun, transformingPaint});
}
this->setCTM(originalCTM);
}
//////////////////////////////////////////////////////////////////////////////////////////
sk_sp<SkSurface> SkBaseDevice::makeSurface(SkImageInfo const&, SkSurfaceProps const&) {
return nullptr;
}
//////////////////////////////////////////////////////////////////////////////////////////
void SkBaseDevice::LogDrawScaleFactor(const SkMatrix& view, const SkMatrix& srcToDst,
SkFilterQuality filterQuality) {
#if SK_HISTOGRAMS_ENABLED
SkMatrix matrix = SkMatrix::Concat(view, srcToDst);
enum ScaleFactor {
kUpscale_ScaleFactor,
kNoScale_ScaleFactor,
kDownscale_ScaleFactor,
kLargeDownscale_ScaleFactor,
kLast_ScaleFactor = kLargeDownscale_ScaleFactor
};
float rawScaleFactor = matrix.getMinScale();
ScaleFactor scaleFactor;
if (rawScaleFactor < 0.5f) {
scaleFactor = kLargeDownscale_ScaleFactor;
} else if (rawScaleFactor < 1.0f) {
scaleFactor = kDownscale_ScaleFactor;
} else if (rawScaleFactor > 1.0f) {
scaleFactor = kUpscale_ScaleFactor;
} else {
scaleFactor = kNoScale_ScaleFactor;
}
switch (filterQuality) {
case kNone_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.NoneFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
case kLow_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.LowFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
case kMedium_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.MediumFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
case kHigh_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.HighFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
}
// Also log filter quality independent scale factor.
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.AnyFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
// Also log an overall histogram of filter quality.
SK_HISTOGRAM_ENUMERATION("FilterQuality", filterQuality, kLast_SkFilterQuality + 1);
#endif
}