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- /*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkBlendMode.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkColorSpace.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkTypeface.h"
- #include "include/core/SkTypes.h"
- #include "include/utils/SkRandom.h"
- #include "tools/ToolUtils.h"
- namespace skiagm {
- /**
- * Renders overlapping shapes with colorburn against a checkerboard.
- */
- class DstReadShuffle : public GM {
- public:
- DstReadShuffle() { this->setBGColor(kBackground); }
- protected:
- enum ShapeType {
- kCircle_ShapeType,
- kRoundRect_ShapeType,
- kRect_ShapeType,
- kConvexPath_ShapeType,
- kConcavePath_ShapeType,
- kText_ShapeType,
- kNumShapeTypes
- };
- SkString onShortName() override {
- return SkString("dstreadshuffle");
- }
- SkISize onISize() override {
- return SkISize::Make(530, 680);
- }
- void drawShape(SkCanvas* canvas, SkPaint* paint, ShapeType type) {
- const SkRect kRect = SkRect::MakeXYWH(0, 0, 75.f, 85.f);
- switch (type) {
- case kCircle_ShapeType:
- canvas->drawCircle(kRect.centerX(), kRect.centerY(), kRect.width() / 2.f, *paint);
- break;
- case kRoundRect_ShapeType:
- canvas->drawRoundRect(kRect, 15.f, 15.f, *paint);
- break;
- case kRect_ShapeType:
- canvas->drawRect(kRect, *paint);
- break;
- case kConvexPath_ShapeType:
- if (fConvexPath.isEmpty()) {
- SkPoint points[4];
- kRect.toQuad(points);
- fConvexPath.moveTo(points[0]);
- fConvexPath.quadTo(points[1], points[2]);
- fConvexPath.quadTo(points[3], points[0]);
- SkASSERT(fConvexPath.isConvex());
- }
- canvas->drawPath(fConvexPath, *paint);
- break;
- case kConcavePath_ShapeType:
- if (fConcavePath.isEmpty()) {
- SkPoint points[5] = {{50.f, 0.f}};
- SkMatrix rot;
- rot.setRotate(360.f / 5, 50.f, 70.f);
- for (int i = 1; i < 5; ++i) {
- rot.mapPoints(points + i, points + i - 1, 1);
- }
- fConcavePath.moveTo(points[0]);
- for (int i = 0; i < 5; ++i) {
- fConcavePath.lineTo(points[(2 * i) % 5]);
- }
- fConcavePath.setFillType(SkPath::kEvenOdd_FillType);
- SkASSERT(!fConcavePath.isConvex());
- }
- canvas->drawPath(fConcavePath, *paint);
- break;
- case kText_ShapeType: {
- const char* text = "N";
- SkFont font(ToolUtils::create_portable_typeface(), 100);
- font.setEmbolden(true);
- canvas->drawString(text, 0.f, 100.f, font, *paint);
- }
- default:
- break;
- }
- }
- static SkColor GetColor(SkRandom* random) {
- SkColor color = ToolUtils::color_to_565(random->nextU() | 0xFF000000);
- return SkColorSetA(color, 0x80);
- }
- static void DrawHairlines(SkCanvas* canvas) {
- if (canvas->imageInfo().alphaType() == kOpaque_SkAlphaType) {
- canvas->clear(kBackground);
- } else {
- canvas->clear(SK_ColorTRANSPARENT);
- }
- SkPaint hairPaint;
- hairPaint.setStyle(SkPaint::kStroke_Style);
- hairPaint.setStrokeWidth(0);
- hairPaint.setAntiAlias(true);
- static constexpr int kNumHairlines = 12;
- SkPoint pts[] = {{3.f, 7.f}, {29.f, 7.f}};
- SkRandom colorRandom;
- SkMatrix rot;
- rot.setRotate(360.f / kNumHairlines, 15.5f, 12.f);
- rot.postTranslate(3.f, 0);
- for (int i = 0; i < 12; ++i) {
- hairPaint.setColor(GetColor(&colorRandom));
- canvas->drawLine(pts[0], pts[1], hairPaint);
- rot.mapPoints(pts, 2);
- }
- }
- void onDraw(SkCanvas* canvas) override {
- SkScalar y = 5;
- for (int i = 0; i < kNumShapeTypes; i++) {
- SkRandom colorRandom;
- ShapeType shapeType = static_cast<ShapeType>(i);
- SkScalar x = 5;
- for (int r = 0; r <= 15; r++) {
- SkPaint p;
- p.setAntiAlias(true);
- p.setColor(GetColor(&colorRandom));
- // In order to get some op combining on the GPU backend we do 2 src over
- // for each xfer mode which requires a dst read
- p.setBlendMode(r % 3 == 0 ? SkBlendMode::kColorBurn : SkBlendMode::kSrcOver);
- canvas->save();
- canvas->translate(x, y);
- this->drawShape(canvas, &p, shapeType);
- canvas->restore();
- x += 15;
- }
- y += 110;
- }
- // Draw hairlines to a surface and then draw that to the main canvas with a zoom so that
- // it is easier to see how they blend.
- SkImageInfo info;
- // Recording canvases don't have a color type.
- if (SkColorType::kUnknown_SkColorType == canvas->imageInfo().colorType()) {
- info = SkImageInfo::MakeN32Premul(35, 35);
- } else {
- info = SkImageInfo::Make(35, 35,
- canvas->imageInfo().colorType(),
- canvas->imageInfo().alphaType(),
- canvas->imageInfo().refColorSpace());
- }
- auto surf = canvas->makeSurface(info);
- if (!surf) {
- // Fall back to raster. Raster supports only one of the 8 bit per-channel RGBA or BGRA
- // formats. This fall back happens when running with --preAbandonGpuContext.
- if ((info.colorType() == kRGBA_8888_SkColorType ||
- info.colorType() == kBGRA_8888_SkColorType) &&
- info.colorType() != kN32_SkColorType) {
- info = SkImageInfo::Make(35, 35,
- kN32_SkColorType,
- canvas->imageInfo().alphaType(),
- canvas->imageInfo().refColorSpace());
- }
- surf = SkSurface::MakeRaster(info);
- SkASSERT(surf);
- }
- canvas->scale(5.f, 5.f);
- canvas->translate(67.f, 10.f);
- DrawHairlines(surf->getCanvas());
- canvas->drawImage(surf->makeImageSnapshot(), 0.f, 0.f);
- }
- private:
- static constexpr SkColor kBackground = SK_ColorLTGRAY;
- SkPath fConcavePath;
- SkPath fConvexPath;
- typedef GM INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_GM( return new DstReadShuffle; )
- }
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