| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkColorFilter.h" |
| #include "SkDrawable.h" |
| #include "SkFindAndPlaceGlyph.h" |
| #include "SkImagePriv.h" |
| #include "SkLatticeIter.h" |
| #include "SkOverdrawCanvas.h" |
| #include "SkPatchUtils.h" |
| #include "SkPath.h" |
| #include "SkRRect.h" |
| #include "SkRSXform.h" |
| #include "SkTextBlob.h" |
| #include "SkTextBlobRunIterator.h" |
| |
| namespace { |
| class ProcessOneGlyphBounds { |
| public: |
| ProcessOneGlyphBounds(SkOverdrawCanvas* canvas) |
| : fCanvas(canvas) |
| {} |
| |
| void operator()(const SkGlyph& glyph, SkPoint position, SkPoint rounding) { |
| int left = SkScalarFloorToInt(position.fX) + glyph.fLeft; |
| int top = SkScalarFloorToInt(position.fY) + glyph.fTop; |
| int right = left + glyph.fWidth; |
| int bottom = top + glyph.fHeight; |
| fCanvas->onDrawRect(SkRect::MakeLTRB(left, top, right, bottom), SkPaint()); |
| } |
| |
| private: |
| SkOverdrawCanvas* fCanvas; |
| }; |
| }; |
| |
| SkOverdrawCanvas::SkOverdrawCanvas(SkCanvas* canvas) |
| : INHERITED(canvas->onImageInfo().width(), canvas->onImageInfo().height()) |
| { |
| // Non-drawing calls that SkOverdrawCanvas does not override (translate, save, etc.) |
| // will pass through to the input canvas. |
| this->addCanvas(canvas); |
| |
| static constexpr float kIncrementAlpha[] = { |
| 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, |
| 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, |
| 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, |
| 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, |
| }; |
| |
| fPaint.setAntiAlias(false); |
| fPaint.setBlendMode(SkBlendMode::kPlus); |
| fPaint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(kIncrementAlpha)); |
| } |
| |
| void SkOverdrawCanvas::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y, |
| const SkPaint& paint) { |
| ProcessOneGlyphBounds processBounds(this); |
| SkSurfaceProps props(0, kUnknown_SkPixelGeometry); |
| this->getProps(&props); |
| SkAutoGlyphCache cache(paint, &props, SkScalerContextFlags::kNone, &this->getTotalMatrix()); |
| SkFindAndPlaceGlyph::ProcessText(paint.getTextEncoding(), (const char*) text, byteLength, |
| SkPoint::Make(x, y), SkMatrix(), paint.getTextAlign(), |
| cache.get(), processBounds); |
| } |
| |
| void SkOverdrawCanvas::drawPosTextCommon(const void* text, size_t byteLength, const SkScalar pos[], |
| int scalarsPerPos, const SkPoint& offset, |
| const SkPaint& paint) { |
| ProcessOneGlyphBounds processBounds(this); |
| SkSurfaceProps props(0, kUnknown_SkPixelGeometry); |
| this->getProps(&props); |
| SkAutoGlyphCache cache(paint, &props, SkScalerContextFlags::kNone, &this->getTotalMatrix()); |
| SkFindAndPlaceGlyph::ProcessPosText(paint.getTextEncoding(), (const char*) text, byteLength, |
| SkPoint::Make(0, 0), SkMatrix(), (const SkScalar*) pos, 2, |
| paint.getTextAlign(), cache.get(), processBounds); |
| } |
| |
| void SkOverdrawCanvas::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[], |
| const SkPaint& paint) { |
| this->drawPosTextCommon(text, byteLength, (SkScalar*) pos, 2, SkPoint::Make(0, 0), paint); |
| } |
| |
| void SkOverdrawCanvas::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xs[], |
| SkScalar y, const SkPaint& paint) { |
| this->drawPosTextCommon(text, byteLength, (SkScalar*) xs, 1, SkPoint::Make(0, y), paint); |
| } |
| |
| void SkOverdrawCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path, |
| const SkMatrix* matrix, const SkPaint& paint) { |
| SkASSERT(false); |
| return; |
| } |
| |
| typedef int (*CountTextProc)(const char* text); |
| static int count_utf16(const char* text) { |
| const uint16_t* prev = (uint16_t*)text; |
| (void)SkUTF16_NextUnichar(&prev); |
| return SkToInt((const char*)prev - text); |
| } |
| static int return_4(const char* text) { return 4; } |
| static int return_2(const char* text) { return 2; } |
| |
| void SkOverdrawCanvas::onDrawTextRSXform(const void* text, size_t byteLength, |
| const SkRSXform xform[], const SkRect*, |
| const SkPaint& paint) { |
| CountTextProc proc = nullptr; |
| switch (paint.getTextEncoding()) { |
| case SkPaint::kUTF8_TextEncoding: |
| proc = SkUTF8_CountUTF8Bytes; |
| break; |
| case SkPaint::kUTF16_TextEncoding: |
| proc = count_utf16; |
| break; |
| case SkPaint::kUTF32_TextEncoding: |
| proc = return_4; |
| break; |
| case SkPaint::kGlyphID_TextEncoding: |
| proc = return_2; |
| break; |
| } |
| SkASSERT(proc); |
| |
| SkMatrix matrix; |
| const void* stopText = (const char*)text + byteLength; |
| while ((const char*)text < (const char*)stopText) { |
| matrix.setRSXform(*xform++); |
| matrix.setConcat(this->getTotalMatrix(), matrix); |
| int subLen = proc((const char*)text); |
| |
| this->save(); |
| this->concat(matrix); |
| this->drawText(text, subLen, 0, 0, paint); |
| this->restore(); |
| |
| text = (const char*)text + subLen; |
| } |
| } |
| |
| void SkOverdrawCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, |
| const SkPaint& paint) { |
| SkPaint runPaint = paint; |
| SkTextBlobRunIterator it(blob); |
| for (;!it.done(); it.next()) { |
| size_t textLen = it.glyphCount() * sizeof(uint16_t); |
| const SkPoint& offset = it.offset(); |
| it.applyFontToPaint(&runPaint); |
| switch (it.positioning()) { |
| case SkTextBlob::kDefault_Positioning: |
| this->onDrawText(it.glyphs(), textLen, x + offset.x(), y + offset.y(), runPaint); |
| break; |
| case SkTextBlob::kHorizontal_Positioning: |
| this->drawPosTextCommon(it.glyphs(), textLen, it.pos(), 1, |
| SkPoint::Make(x, y + offset.y()), runPaint); |
| break; |
| case SkTextBlob::kFull_Positioning: |
| this->drawPosTextCommon(it.glyphs(), textLen, it.pos(), 2, SkPoint::Make(x, y), |
| runPaint); |
| break; |
| default: |
| SkASSERT(false); |
| break; |
| } |
| } |
| } |
| |
| void SkOverdrawCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], |
| const SkPoint texCoords[4], SkBlendMode blendMode, |
| const SkPaint&) { |
| fList[0]->onDrawPatch(cubics, colors, texCoords, blendMode, fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawPaint(const SkPaint& paint) { |
| if (0 == paint.getColor() && !paint.getColorFilter() && !paint.getShader()) { |
| // This is a clear, ignore it. |
| } else { |
| fList[0]->onDrawPaint(this->overdrawPaint(paint)); |
| } |
| } |
| |
| void SkOverdrawCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint) { |
| fList[0]->onDrawRect(rect, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawRegion(const SkRegion& region, const SkPaint& paint) { |
| fList[0]->onDrawRegion(region, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawOval(const SkRect& oval, const SkPaint& paint) { |
| fList[0]->onDrawOval(oval, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawArc(const SkRect& arc, SkScalar startAngle, SkScalar sweepAngle, |
| bool useCenter, const SkPaint& paint) { |
| fList[0]->onDrawArc(arc, startAngle, sweepAngle, useCenter, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, |
| const SkPaint& paint) { |
| fList[0]->onDrawDRRect(outer, inner, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawRRect(const SkRRect& rect, const SkPaint& paint) { |
| fList[0]->onDrawRRect(rect, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawPoints(PointMode mode, size_t count, const SkPoint points[], |
| const SkPaint& paint) { |
| fList[0]->onDrawPoints(mode, count, points, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode blendMode, |
| const SkPaint& paint) { |
| fList[0]->onDrawVerticesObject(vertices, blendMode, this->overdrawPaint(paint)); |
| } |
| |
| void SkOverdrawCanvas::onDrawAtlas(const SkImage* image, const SkRSXform xform[], |
| const SkRect texs[], const SkColor colors[], int count, |
| SkBlendMode mode, const SkRect* cull, const SkPaint* paint) { |
| SkPaint* paintPtr = &fPaint; |
| SkPaint storage; |
| if (paint) { |
| storage = this->overdrawPaint(*paint); |
| paintPtr = &storage; |
| } |
| |
| fList[0]->onDrawAtlas(image, xform, texs, colors, count, mode, cull, paintPtr); |
| } |
| |
| void SkOverdrawCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) { |
| fList[0]->onDrawPath(path, fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawImage(const SkImage* image, SkScalar x, SkScalar y, const SkPaint*) { |
| fList[0]->onDrawRect(SkRect::MakeXYWH(x, y, image->width(), image->height()), fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst, |
| const SkPaint*, SrcRectConstraint) { |
| fList[0]->onDrawRect(dst, fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawImageNine(const SkImage*, const SkIRect&, const SkRect& dst, |
| const SkPaint*) { |
| fList[0]->onDrawRect(dst, fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawImageLattice(const SkImage* image, const Lattice& lattice, |
| const SkRect& dst, const SkPaint*) { |
| SkIRect bounds; |
| Lattice latticePlusBounds = lattice; |
| if (!latticePlusBounds.fBounds) { |
| bounds = SkIRect::MakeWH(image->width(), image->height()); |
| latticePlusBounds.fBounds = &bounds; |
| } |
| |
| if (SkLatticeIter::Valid(image->width(), image->height(), latticePlusBounds)) { |
| SkLatticeIter iter(latticePlusBounds, dst); |
| |
| SkRect dummy, iterDst; |
| while (iter.next(&dummy, &iterDst)) { |
| fList[0]->onDrawRect(iterDst, fPaint); |
| } |
| } else { |
| fList[0]->onDrawRect(dst, fPaint); |
| } |
| } |
| |
| void SkOverdrawCanvas::onDrawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y, |
| const SkPaint*) { |
| fList[0]->onDrawRect(SkRect::MakeXYWH(x, y, bitmap.width(), bitmap.height()), fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect& dst, |
| const SkPaint*, SrcRectConstraint) { |
| fList[0]->onDrawRect(dst, fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawBitmapNine(const SkBitmap&, const SkIRect&, const SkRect& dst, |
| const SkPaint*) { |
| fList[0]->onDrawRect(dst, fPaint); |
| } |
| |
| void SkOverdrawCanvas::onDrawBitmapLattice(const SkBitmap& bitmap, const Lattice& lattice, |
| const SkRect& dst, const SkPaint* paint) { |
| sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode); |
| this->onDrawImageLattice(image.get(), lattice, dst, paint); |
| } |
| |
| void SkOverdrawCanvas::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) { |
| drawable->draw(this, matrix); |
| } |
| |
| void SkOverdrawCanvas::onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) { |
| SkASSERT(false); |
| return; |
| } |
| |
| inline SkPaint SkOverdrawCanvas::overdrawPaint(const SkPaint& paint) { |
| SkPaint newPaint = fPaint; |
| newPaint.setStyle(paint.getStyle()); |
| newPaint.setStrokeWidth(paint.getStrokeWidth()); |
| return newPaint; |
| } |