blob: b6426bae24a7914b5183bb1db06ff535c1a832f7 [file] [log] [blame]
* 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 "include/core/SkOverdrawCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkDrawable.h"
#include "include/core/SkPath.h"
#include "include/core/SkRRect.h"
#include "include/core/SkRSXform.h"
#include "include/core/SkTextBlob.h"
#include "include/private/SkTo.h"
#include "src/core/SkDevice.h"
#include "src/core/SkDrawShadowInfo.h"
#include "src/core/SkGlyphRunPainter.h"
#include "src/core/SkImagePriv.h"
#include "src/core/SkLatticeIter.h"
#include "src/core/SkStrikeCache.h"
#include "src/core/SkTextBlobPriv.h"
#include "src/utils/SkPatchUtils.h"
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.
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/255,
namespace {
class TextDevice : public SkNoPixelsDevice, public SkGlyphRunListPainter::BitmapDevicePainter {
TextDevice(SkCanvas* overdrawCanvas, const SkSurfaceProps& props)
: SkNoPixelsDevice{SkIRect::MakeWH(32767, 32767), props},
fPainter{props, kN32_SkColorType, nullptr, SkStrikeCache::GlobalStrikeCache()} {}
void paintPaths(SkDrawableGlyphBuffer*, SkScalar, SkPoint, const SkPaint&) const override {}
void paintMasks(SkDrawableGlyphBuffer* drawables, const SkPaint& paint) const override {
for (auto t : drawables->drawable()) {
SkGlyphVariant glyph; SkPoint pos;
std::tie(glyph, pos) = t;
SkMask mask = glyph.glyph()->mask(pos);
fOverdrawCanvas->drawRect(SkRect::Make(mask.fBounds), SkPaint());
void drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect* dstOrNull,
const SkSamplingOptions&, const SkPaint&) const override {}
void onDrawGlyphRunList(const SkGlyphRunList& glyphRunList, const SkPaint& paint) override {
fPainter.drawForBitmapDevice(glyphRunList, paint, fOverdrawCanvas->getTotalMatrix(), this);
SkCanvas* const fOverdrawCanvas;
SkGlyphRunListPainter fPainter;
} // namespace
void SkOverdrawCanvas::onDrawTextBlob(
const SkTextBlob* blob, SkScalar x, SkScalar y, const SkPaint& paint) {
SkGlyphRunBuilder b;
auto glyphRunList = b.blobToGlyphRunList(*blob, {x, y});
this->onDrawGlyphRunList(glyphRunList, paint);
void SkOverdrawCanvas::onDrawGlyphRunList(
const SkGlyphRunList& glyphRunList, const SkPaint& paint) {
SkSurfaceProps props{0, kUnknown_SkPixelGeometry};
TextDevice device{this, props};
device.drawGlyphRunList(glyphRunList, paint);
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 {
void SkOverdrawCanvas::onDrawBehind(const SkPaint& 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::onDrawAtlas2(const SkImage* image, const SkRSXform xform[],
const SkRect texs[], const SkColor colors[], int count,
SkBlendMode mode, const SkSamplingOptions& sampling,
const SkRect* cull, const SkPaint* paint) {
SkPaint* paintPtr = &fPaint;
SkPaint storage;
if (paint) {
storage = this->overdrawPaint(*paint);
paintPtr = &storage;
fList[0]->onDrawAtlas2(image, xform, texs, colors, count, mode, sampling, cull, paintPtr);
void SkOverdrawCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
fList[0]->onDrawPath(path, fPaint);
void SkOverdrawCanvas::onDrawImage2(const SkImage* image, SkScalar x, SkScalar y,
const SkSamplingOptions&, const SkPaint*) {
fList[0]->onDrawRect(SkRect::MakeXYWH(x, y, image->width(), image->height()), fPaint);
void SkOverdrawCanvas::onDrawImageRect2(const SkImage* image, const SkRect& src, const SkRect& dst,
const SkSamplingOptions&, const SkPaint*, SrcRectConstraint) {
fList[0]->onDrawRect(dst, fPaint);
void SkOverdrawCanvas::onDrawImageLattice2(const SkImage* image, const Lattice& lattice,
const SkRect& dst, SkFilterMode, 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 ignored, iterDst;
while (, &iterDst)) {
fList[0]->onDrawRect(iterDst, fPaint);
} else {
fList[0]->onDrawRect(dst, fPaint);
void SkOverdrawCanvas::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) {
drawable->draw(this, matrix);
void SkOverdrawCanvas::onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) {
void SkOverdrawCanvas::onDrawAnnotation(const SkRect&, const char[], SkData*) {}
void SkOverdrawCanvas::onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) {
SkRect bounds;
SkDrawShadowMetrics::GetLocalBounds(path, rec, this->getTotalMatrix(), &bounds);
fList[0]->onDrawRect(bounds, fPaint);
void SkOverdrawCanvas::onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4],
QuadAAFlags aa, const SkColor4f& color, SkBlendMode mode) {
if (clip) {
fList[0]->onDrawPath(SkPath::Polygon(clip, 4, true), fPaint);
} else {
fList[0]->onDrawRect(rect, fPaint);
void SkOverdrawCanvas::onDrawEdgeAAImageSet2(const ImageSetEntry set[], int count,
const SkPoint dstClips[],
const SkMatrix preViewMatrices[],
const SkSamplingOptions& sampling,
const SkPaint* paint,
SrcRectConstraint constraint) {
int clipIndex = 0;
for (int i = 0; i < count; ++i) {
if (set[i].fMatrixIndex >= 0) {
if (set[i].fHasClip) {
fList[0]->onDrawPath(SkPath::Polygon(dstClips + clipIndex, 4, true), fPaint);
clipIndex += 4;
} else {
fList[0]->onDrawRect(set[i].fDstRect, fPaint);
if (set[i].fMatrixIndex >= 0) {
inline SkPaint SkOverdrawCanvas::overdrawPaint(const SkPaint& paint) {
SkPaint newPaint = fPaint;
return newPaint;