/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkOverdrawCanvas.h"
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#include "SkColorFilter.h"
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#include "SkDrawShadowInfo.h"
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#include "SkDrawable.h"
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#include "SkFindAndPlaceGlyph.h"
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#include "SkImagePriv.h"
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#include "SkLatticeIter.h"
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#include "SkPatchUtils.h"
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#include "SkPath.h"
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#include "SkRRect.h"
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#include "SkRSXform.h"
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#include "SkStrikeCache.h"
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#include "SkTextBlob.h"
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#include "SkTextBlobPriv.h"
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#include "SkTo.h"
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namespace {
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class ProcessOneGlyphBounds {
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public:
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ProcessOneGlyphBounds(SkOverdrawCanvas* canvas)
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: fCanvas(canvas)
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{}
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void operator()(const SkGlyph& glyph, SkPoint position, SkPoint rounding) {
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int left = SkScalarFloorToInt(position.fX) + glyph.fLeft;
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int top = SkScalarFloorToInt(position.fY) + glyph.fTop;
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int right = left + glyph.fWidth;
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int bottom = top + glyph.fHeight;
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fCanvas->onDrawRect(SkRect::MakeLTRB(left, top, right, bottom), SkPaint());
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}
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private:
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SkOverdrawCanvas* fCanvas;
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};
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};
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SkOverdrawCanvas::SkOverdrawCanvas(SkCanvas* canvas)
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: INHERITED(canvas->onImageInfo().width(), canvas->onImageInfo().height())
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{
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// Non-drawing calls that SkOverdrawCanvas does not override (translate, save, etc.)
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// will pass through to the input canvas.
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this->addCanvas(canvas);
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static constexpr float kIncrementAlpha[] = {
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0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
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};
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fPaint.setAntiAlias(false);
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fPaint.setBlendMode(SkBlendMode::kPlus);
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fPaint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(kIncrementAlpha));
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}
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void SkOverdrawCanvas::drawPosTextCommon(const SkGlyphID glyphs[], int count, const SkScalar pos[],
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int scalarsPerPos, const SkPoint& offset,
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const SkFont& font, const SkPaint& paint) {
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ProcessOneGlyphBounds processBounds(this);
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SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
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this->getProps(&props);
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auto cache = SkStrikeCache::FindOrCreateStrikeExclusive(
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font, paint, props,
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SkScalerContextFlags::kNone, this->getTotalMatrix());
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SkFindAndPlaceGlyph::ProcessPosText(glyphs, count,
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SkPoint::Make(0, 0), SkMatrix(), (const SkScalar*) pos, 2,
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cache.get(), processBounds);
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}
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void SkOverdrawCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
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const SkPaint& paint) {
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SkTextBlobRunIterator it(blob);
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for (;!it.done(); it.next()) {
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const SkPoint& offset = it.offset();
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switch (it.positioning()) {
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case SkTextBlobRunIterator::kDefault_Positioning:
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SK_ABORT("This canvas does not support draw text.");
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break;
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case SkTextBlobRunIterator::kHorizontal_Positioning:
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this->drawPosTextCommon(it.glyphs(), it.glyphCount(), it.pos(), 1,
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SkPoint::Make(x, y + offset.y()), it.font(), paint);
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break;
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case SkTextBlobRunIterator::kFull_Positioning:
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this->drawPosTextCommon(it.glyphs(), it.glyphCount(), it.pos(), 2, {x, y},
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it.font(), paint);
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break;
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case SkTextBlobRunIterator::kRSXform_Positioning:
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// unimplemented ...
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break;
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}
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}
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}
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void SkOverdrawCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
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const SkPoint texCoords[4], SkBlendMode blendMode,
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const SkPaint&) {
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fList[0]->onDrawPatch(cubics, colors, texCoords, blendMode, fPaint);
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}
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void SkOverdrawCanvas::onDrawPaint(const SkPaint& paint) {
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if (0 == paint.getColor() && !paint.getColorFilter() && !paint.getShader()) {
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// This is a clear, ignore it.
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} else {
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fList[0]->onDrawPaint(this->overdrawPaint(paint));
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}
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}
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void SkOverdrawCanvas::onDrawBehind(const SkPaint& paint) {
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fList[0]->onDrawBehind(this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint) {
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fList[0]->onDrawRect(rect, this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawEdgeAARect(const SkRect& rect, SkCanvas::QuadAAFlags aa, SkColor color,
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SkBlendMode mode) {
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fList[0]->onDrawRect(rect, fPaint);
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}
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void SkOverdrawCanvas::onDrawRegion(const SkRegion& region, const SkPaint& paint) {
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fList[0]->onDrawRegion(region, this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawOval(const SkRect& oval, const SkPaint& paint) {
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fList[0]->onDrawOval(oval, this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawArc(const SkRect& arc, SkScalar startAngle, SkScalar sweepAngle,
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bool useCenter, const SkPaint& paint) {
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fList[0]->onDrawArc(arc, startAngle, sweepAngle, useCenter, this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
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const SkPaint& paint) {
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fList[0]->onDrawDRRect(outer, inner, this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawRRect(const SkRRect& rect, const SkPaint& paint) {
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fList[0]->onDrawRRect(rect, this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawPoints(PointMode mode, size_t count, const SkPoint points[],
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const SkPaint& paint) {
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fList[0]->onDrawPoints(mode, count, points, this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawVerticesObject(const SkVertices* vertices,
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const SkVertices::Bone bones[], int boneCount,
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SkBlendMode blendMode, const SkPaint& paint) {
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fList[0]->onDrawVerticesObject(vertices,
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bones,
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boneCount,
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blendMode,
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this->overdrawPaint(paint));
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}
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void SkOverdrawCanvas::onDrawAtlas(const SkImage* image, const SkRSXform xform[],
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const SkRect texs[], const SkColor colors[], int count,
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SkBlendMode mode, const SkRect* cull, const SkPaint* paint) {
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SkPaint* paintPtr = &fPaint;
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SkPaint storage;
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if (paint) {
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storage = this->overdrawPaint(*paint);
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paintPtr = &storage;
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}
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fList[0]->onDrawAtlas(image, xform, texs, colors, count, mode, cull, paintPtr);
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}
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void SkOverdrawCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
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fList[0]->onDrawPath(path, fPaint);
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}
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void SkOverdrawCanvas::onDrawImage(const SkImage* image, SkScalar x, SkScalar y, const SkPaint*) {
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fList[0]->onDrawRect(SkRect::MakeXYWH(x, y, image->width(), image->height()), fPaint);
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}
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void SkOverdrawCanvas::onDrawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst,
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const SkPaint*, SrcRectConstraint) {
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fList[0]->onDrawRect(dst, fPaint);
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}
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void SkOverdrawCanvas::onDrawImageNine(const SkImage*, const SkIRect&, const SkRect& dst,
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const SkPaint*) {
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fList[0]->onDrawRect(dst, fPaint);
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}
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void SkOverdrawCanvas::onDrawImageLattice(const SkImage* image, const Lattice& lattice,
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const SkRect& dst, const SkPaint*) {
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SkIRect bounds;
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Lattice latticePlusBounds = lattice;
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if (!latticePlusBounds.fBounds) {
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bounds = SkIRect::MakeWH(image->width(), image->height());
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latticePlusBounds.fBounds = &bounds;
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}
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if (SkLatticeIter::Valid(image->width(), image->height(), latticePlusBounds)) {
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SkLatticeIter iter(latticePlusBounds, dst);
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SkRect dummy, iterDst;
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while (iter.next(&dummy, &iterDst)) {
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fList[0]->onDrawRect(iterDst, fPaint);
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}
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} else {
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fList[0]->onDrawRect(dst, fPaint);
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}
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}
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void SkOverdrawCanvas::onDrawImageSet(const ImageSetEntry set[], int count, SkFilterQuality,
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SkBlendMode) {
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for (int i = 0; i < count; ++i) {
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fList[0]->onDrawRect(set[i].fDstRect, fPaint);
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}
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}
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void SkOverdrawCanvas::onDrawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y,
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const SkPaint*) {
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fList[0]->onDrawRect(SkRect::MakeXYWH(x, y, bitmap.width(), bitmap.height()), fPaint);
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}
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void SkOverdrawCanvas::onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect& dst,
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const SkPaint*, SrcRectConstraint) {
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fList[0]->onDrawRect(dst, fPaint);
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}
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void SkOverdrawCanvas::onDrawBitmapNine(const SkBitmap&, const SkIRect&, const SkRect& dst,
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const SkPaint*) {
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fList[0]->onDrawRect(dst, fPaint);
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}
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void SkOverdrawCanvas::onDrawBitmapLattice(const SkBitmap& bitmap, const Lattice& lattice,
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const SkRect& dst, const SkPaint* paint) {
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sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
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this->onDrawImageLattice(image.get(), lattice, dst, paint);
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}
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void SkOverdrawCanvas::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) {
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drawable->draw(this, matrix);
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}
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void SkOverdrawCanvas::onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) {
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SkASSERT(false);
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return;
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}
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void SkOverdrawCanvas::onDrawAnnotation(const SkRect&, const char[], SkData*) {}
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void SkOverdrawCanvas::onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) {
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SkRect bounds;
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SkDrawShadowMetrics::GetLocalBounds(path, rec, this->getTotalMatrix(), &bounds);
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fList[0]->onDrawRect(bounds, fPaint);
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}
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inline SkPaint SkOverdrawCanvas::overdrawPaint(const SkPaint& paint) {
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SkPaint newPaint = fPaint;
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newPaint.setStyle(paint.getStyle());
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newPaint.setStrokeWidth(paint.getStrokeWidth());
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return newPaint;
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}
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