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- /*
- * Copyright 2017 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/SkImage.h"
- #include "include/core/SkImageFilter.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkMaskFilter.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPicture.h"
- #include "include/core/SkPictureRecorder.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkTextBlob.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypeface.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkBlurImageFilter.h"
- #include "include/effects/SkGradientShader.h"
- #include "include/effects/SkShaderMaskFilter.h"
- #include "include/utils/SkRandom.h"
- #include "src/core/SkCanvasPriv.h"
- #include "tools/Resources.h"
- #include "tools/ToolUtils.h"
- #include <string.h>
- #include <initializer_list>
- // This GM tests out the deprecated Android-specific unclipped saveLayer "feature".
- // In particular, it attempts to compare the performance of unclipped saveLayers with alternatives.
- static void save_layer_unclipped(SkCanvas* canvas,
- SkScalar l, SkScalar t, SkScalar r, SkScalar b) {
- SkRect rect = SkRect::MakeLTRB(l, t, r, b);
- canvas->saveLayer({ &rect, nullptr, nullptr, nullptr, nullptr,
- (SkCanvas::SaveLayerFlags) SkCanvasPriv::kDontClipToLayer_SaveLayerFlag });
- }
- static void do_draw(SkCanvas* canvas) {
- SkPaint paint;
- SkRandom rand;
- for (int i = 0; i < 20; ++i) {
- paint.setColor(ToolUtils::color_to_565(rand.nextU() | (0xFF << 24)));
- canvas->drawRect({ 15, 15, 290, 40 }, paint);
- canvas->translate(0, 30);
- }
- }
- class UnclippedSaveLayerGM : public skiagm::GM {
- public:
- enum class Mode {
- kClipped,
- kUnclipped
- };
- UnclippedSaveLayerGM(Mode mode) : fMode(mode) { this->setBGColor(SK_ColorWHITE); }
- protected:
- bool runAsBench() const override { return true; }
- SkString onShortName() override {
- if (Mode::kClipped == fMode) {
- return SkString("savelayer_unclipped");
- } else {
- SkASSERT(Mode::kUnclipped == fMode);
- return SkString("savelayer_clipped");
- }
- }
- SkISize onISize() override { return SkISize::Make(320, 640); }
- void onDraw(SkCanvas* canvas) override {
- const SkScalar L = 10;
- const SkScalar T = 10;
- const SkScalar R = 310;
- const SkScalar B = 630;
- canvas->clipRect({ L, T, R, B });
- for (int i = 0; i < 100; ++i) {
- SkAutoCanvasRestore acr(canvas, true);
- if (Mode::kClipped == fMode) {
- save_layer_unclipped(canvas, L, T, R, T + 20);
- save_layer_unclipped(canvas, L, B - 20, R, B);
- } else {
- SkASSERT(Mode::kUnclipped == fMode);
- canvas->saveLayer({ L, T, R, B }, nullptr);
- }
- do_draw(canvas);
- }
- }
- private:
- Mode fMode;
- typedef skiagm::GM INHERITED;
- };
- DEF_GM(return new UnclippedSaveLayerGM(UnclippedSaveLayerGM::Mode::kClipped);)
- DEF_GM(return new UnclippedSaveLayerGM(UnclippedSaveLayerGM::Mode::kUnclipped);)
- DEF_SIMPLE_GM(picture_savelayer, canvas, 320, 640) {
- SkPaint paint1, paint2, paint3;
- paint1.setAlphaf(0.5f);
- paint2.setAlphaf(0.25f);
- paint3.setColor(0xFFFF0000);
- SkRect rect1{40, 5, 80, 70}, rect2{5, 40, 70, 80}, rect3{10, 10, 70, 70};
- // In the future, we might also test the clipped case by allowing i = 0
- for(int i = 1; i < 2; ++i) {
- canvas->translate(100 * i, 0);
- auto flag = i ?
- (SkCanvas::SaveLayerFlags) SkCanvasPriv::kDontClipToLayer_SaveLayerFlag : 0;
- canvas->saveLayer({ &rect1, &paint1, nullptr, nullptr, nullptr, flag});
- canvas->saveLayer({ &rect2, &paint2, nullptr, nullptr, nullptr, flag});
- canvas->drawRect(rect3, paint3);
- canvas->restore();
- canvas->restore();
- }
- };
- // Test kInitWithPrevious_SaveLayerFlag by drawing an image, save a layer with the flag, which
- // should seed the layer with the image (from below). Then we punch a hole in the layer and
- // restore with kPlus mode, which should show the mandrill super-bright on the outside, but
- // normal where we punched the hole.
- DEF_SIMPLE_GM(savelayer_initfromprev, canvas, 256, 256) {
- canvas->drawImage(GetResourceAsImage("images/mandrill_256.png"), 0, 0, nullptr);
- SkCanvas::SaveLayerRec rec;
- SkPaint paint;
- paint.setBlendMode(SkBlendMode::kPlus);
- rec.fSaveLayerFlags = SkCanvas::kInitWithPrevious_SaveLayerFlag;
- rec.fPaint = &paint;
- canvas->saveLayer(rec);
- paint.setBlendMode(SkBlendMode::kClear);
- canvas->drawCircle(128, 128, 96, paint);
- canvas->restore();
- };
- static void draw_mask(SkCanvas* canvas, int size) {
- const SkScalar cx = size * SK_ScalarHalf,
- cy = cx;
- const SkColor colors[] = { 0x00000000, 0xffff0000, 0x00000000, 0xffff0000, 0x00000000,
- 0xffff0000, 0x00000000, 0xffff0000, 0x00000000 };
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setShader(SkGradientShader::MakeSweep(cx, cy, colors, nullptr, SK_ARRAY_COUNT(colors)));
- canvas->drawPaint(paint);
- paint.setShader(SkGradientShader::MakeRadial({cx, cy}, size / 4, colors, nullptr, 2,
- SkTileMode::kClamp));
- canvas->drawCircle(cx, cy, size / 4, paint);
- }
- DEF_SIMPLE_GM(savelayer_clipmask, canvas, 1200, 1200) {
- static constexpr int kSize = 100;
- static constexpr SkRect kLayerBounds = { kSize * 0.25f, kSize * 0.25f,
- kSize * 0.75f, kSize * 0.75f };
- static constexpr struct {
- const SkRect* bounds;
- const SkScalar matrix[9];
- } kConfigs[] = {
- { nullptr, { 1 , 0 , 0, 0 , 1 , 0, 0, 0, 1 } },
- { nullptr, { 2 , 0 , 0, 0 , 2 , 0, 0, 0, 1 } },
- { nullptr, { 2 , 0 , -50, 0 , 2 , -50, 0, 0, 1 } },
- { nullptr, { 0.707f, -0.707f, 50, 0.707f, 0.707f, -20, 0, 0, 1 } },
- { nullptr, { 0.5f , 0 , 25, 0 , 0.5f , 25, 0, 0, 1 } },
- { &kLayerBounds, { 1 , 0 , 0, 0 , 1 , 0, 0, 0, 1 } },
- { &kLayerBounds, { 2 , 0 , 0, 0 , 2 , 0, 0, 0, 1 } },
- { &kLayerBounds, { 2 , 0 , -50, 0 , 2 , -50, 0, 0, 1 } },
- { &kLayerBounds, { 0.707f, -0.707f, 50, 0.707f, 0.707f, -20, 0, 0, 1 } },
- { &kLayerBounds, { 0.5f , 0 , 25, 0 , 0.5f , 25, 0, 0, 1 } },
- };
- using MaskMakerFunc = sk_sp<SkImage> (*)(int size);
- static const MaskMakerFunc kMaskMakers[] = {
- [](int size) -> sk_sp<SkImage> {
- auto surf = SkSurface::MakeRaster(SkImageInfo::MakeA8(size, size));
- draw_mask(surf->getCanvas(), size);
- return surf->makeImageSnapshot();
- },
- [](int size) -> sk_sp<SkImage> {
- auto surf = SkSurface::MakeRasterN32Premul(size, size);
- draw_mask(surf->getCanvas(), size);
- return surf->makeImageSnapshot();
- },
- [](int size) -> sk_sp<SkImage> {
- SkPictureRecorder recorder;
- draw_mask(recorder.beginRecording(size, size), size);
- return SkImage::MakeFromPicture(recorder.finishRecordingAsPicture(),
- SkISize::Make(size, size),
- nullptr, nullptr,
- SkImage::BitDepth::kU8,
- SkColorSpace::MakeSRGB());
- }
- };
- using PaintMakerFunc = SkPaint (*)();
- static const PaintMakerFunc kPaintMakers[] = {
- []() -> SkPaint { return SkPaint(); },
- []() -> SkPaint {
- SkPaint p; p.setImageFilter(SkBlurImageFilter::Make(2, 2, nullptr)); return p;
- },
- []() -> SkPaint { SkPaint p; p.setBlendMode(SkBlendMode::kSrcOut); return p; },
- };
- canvas->drawColor(0xffcccccc);
- SkMatrix clipMatrix;
- SkCanvas::SaveLayerRec rec;
- rec.fClipMatrix = &clipMatrix;
- for (const auto& paintMaker : kPaintMakers) {
- auto layerPaint = paintMaker();
- rec.fPaint = &layerPaint;
- for (const auto& maskMaker : kMaskMakers) {
- sk_sp<SkImage> mask = maskMaker(kSize);
- rec.fClipMask = mask.get();
- canvas->save();
- for (const auto cfg : kConfigs) {
- rec.fBounds = cfg.bounds;
- clipMatrix.set9(cfg.matrix);
- canvas->saveLayer(rec);
- SkPaint paint;
- paint.setColor(0xff0000ff);
- canvas->drawRect(SkRect::MakeWH(50, 50), paint);
- paint.setColor(0xffff0000);
- canvas->drawRect(SkRect::MakeXYWH(50, 0, 50, 50), paint);
- paint.setColor(0xff00ff00);
- canvas->drawRect(SkRect::MakeXYWH(50, 50, 50, 50), paint);
- paint.setColor(0xffffff00);
- canvas->drawRect(SkRect::MakeXYWH(0, 50, 50, 50), paint);
- canvas->restore();
- canvas->translate(120, 0);
- }
- canvas->restore();
- canvas->translate(0, 120);
- }
- }
- }
- DEF_SIMPLE_GM(savelayer_coverage, canvas, 500, 500) {
- canvas->saveLayer(nullptr, nullptr);
- SkRect r = { 0, 0, 200, 200 };
- SkPaint layerPaint;
- layerPaint.setBlendMode(SkBlendMode::kModulate);
- auto image = GetResourceAsImage("images/mandrill_128.png");
- auto proc = [layerPaint](SkCanvas* canvas, SkCanvas::SaveLayerRec& rec) {
- SkPaint paint;
- paint.setColor(SK_ColorRED);
- canvas->saveLayer(rec);
- canvas->drawCircle(100, 100, 50, paint);
- paint.setColor(0x8800FF00);
- canvas->drawRect({10, 90, 190, 110}, paint);
- canvas->restore();
- };
- const int yflags[] = { 0, SkCanvas::kInitWithPrevious_SaveLayerFlag };
- for (int y = 0; y <= 1; ++y) {
- const int xflags[] = { 0, SkCanvas::kMaskAgainstCoverage_EXPERIMENTAL_DONT_USE_SaveLayerFlag };
- for (int x = 0; x <= 1; ++x) {
- canvas->save();
- canvas->translate(x * 200.f, y * 200.f);
- SkCanvas::SaveLayerRec rec(&r, &layerPaint, yflags[y] | xflags[x]);
- canvas->drawImageRect(image, r, nullptr);
- proc(canvas, rec);
- canvas->restore();
- }
- }
- canvas->restore();
- }
- DEF_SIMPLE_GM(savelayer_clipmask_maskfilter, canvas, 500, 500) {
- // Offscreen surface for making the clip mask and mask filter images
- auto surf = SkSurface::MakeRaster(SkImageInfo::MakeA8(100, 100));
- SkPaint maskPaint;
- maskPaint.setColor(SK_ColorWHITE);
- maskPaint.setAntiAlias(true);
- // Draw a centered circle for the mask filter
- surf->getCanvas()->clear(SK_ColorTRANSPARENT);
- surf->getCanvas()->drawCircle(50.f, 50.f, 50.f, maskPaint);
- auto maskFilterImage = surf->makeImageSnapshot();
- sk_sp<SkMaskFilter> maskFilter = SkShaderMaskFilter::Make(maskFilterImage->makeShader());
- // Cut out a cross for the clip mask
- surf->getCanvas()->clear(SK_ColorTRANSPARENT);
- surf->getCanvas()->drawRect(SkRect::MakeLTRB(0.f, 0.f, 40.f, 40.f), maskPaint);
- surf->getCanvas()->drawRect(SkRect::MakeLTRB(60.f, 0.f, 100.f, 40.f), maskPaint);
- surf->getCanvas()->drawRect(SkRect::MakeLTRB(0.f, 60.f, 40.f, 100.f), maskPaint);
- surf->getCanvas()->drawRect(SkRect::MakeLTRB(60.f, 60.f, 100.f, 100.f), maskPaint);
- auto clipMaskImage = surf->makeImageSnapshot();
- SkMatrix clipMatrix = SkMatrix::I();
- SkRect clipBounds = SkRect::MakeWH(100, 100);
- // On the main canvas, save a 100x100 layer three times, applying clip mask, mask filter, or
- // both, translating across the GM for each configuration.
- canvas->clear(SK_ColorGRAY);
- canvas->translate(25.f, 0.f);
- // Clip mask only
- SkCanvas::SaveLayerRec rec;
- rec.fBounds = &clipBounds;
- rec.fClipMask = clipMaskImage.get();
- rec.fClipMatrix = &clipMatrix;
- canvas->saveLayer(rec);
- canvas->clear(SK_ColorWHITE);
- canvas->restore();
- canvas->translate(125.f, 0.f);
- // Mask filter only
- maskPaint.setMaskFilter(maskFilter);
- rec.fClipMask = nullptr;
- rec.fPaint = &maskPaint;
- canvas->saveLayer(rec);
- canvas->clear(SK_ColorWHITE);
- canvas->restore();
- canvas->translate(125.f, 0.f);
- // Both
- rec.fClipMask = clipMaskImage.get();
- canvas->saveLayer(rec);
- canvas->clear(SK_ColorWHITE);
- canvas->restore();
- }
- static void draw_cell(SkCanvas* canvas, sk_sp<SkTextBlob> blob, SkColor c, SkScalar w, SkScalar h,
- bool useDrawBehind) {
- SkRect r = SkRect::MakeWH(w, h);
- SkPaint p;
- p.setColor(c);
- p.setBlendMode(SkBlendMode::kSrc);
- canvas->drawRect(r, p);
- p.setBlendMode(SkBlendMode::kSrcOver);
- const SkScalar margin = 80;
- r.fLeft = w - margin;
- // save the behind image
- SkDEBUGCODE(int sc0 =) canvas->getSaveCount();
- SkDEBUGCODE(int sc1 =) SkCanvasPriv::SaveBehind(canvas, &r);
- SkDEBUGCODE(int sc2 =) canvas->getSaveCount();
- SkASSERT(sc0 == sc1);
- SkASSERT(sc0 + 1 == sc2);
- // draw the foreground (including over the 'behind' section)
- p.setColor(SK_ColorBLACK);
- canvas->drawTextBlob(blob, 10, 30, p);
- // draw the treatment
- const SkPoint pts[] = { {r.fLeft,0}, {r.fRight, 0} };
- const SkColor colors[] = { 0x88000000, 0x0 };
- auto sh = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kClamp);
- p.setShader(sh);
- p.setBlendMode(SkBlendMode::kDstIn);
- if (useDrawBehind) {
- SkCanvasPriv::DrawBehind(canvas, p);
- } else {
- canvas->drawRect(r, p);
- }
- // this should restore the behind image
- canvas->restore();
- SkDEBUGCODE(int sc3 =) canvas->getSaveCount();
- SkASSERT(sc3 == sc0);
- // just outline where we expect the treatment to appear
- p.reset();
- p.setStyle(SkPaint::kStroke_Style);
- p.setAlphaf(0.25f);
- }
- static void draw_list(SkCanvas* canvas, sk_sp<SkTextBlob> blob, bool useDrawBehind) {
- SkAutoCanvasRestore acr(canvas, true);
- SkRandom rand;
- SkScalar w = 400;
- SkScalar h = 40;
- for (int i = 0; i < 8; ++i) {
- SkColor c = rand.nextU(); // ensure we're opaque
- c = (c & 0xFFFFFF) | 0x80000000;
- draw_cell(canvas, blob, c, w, h, useDrawBehind);
- canvas->translate(0, h);
- }
- }
- DEF_SIMPLE_GM(save_behind, canvas, 830, 670) {
- SkFont font;
- font.setTypeface(ToolUtils::create_portable_typeface());
- font.setSize(30);
- const char text[] = "This is a very long line of text";
- auto blob = SkTextBlob::MakeFromText(text, strlen(text), font);
- for (bool useDrawBehind : {false, true}) {
- canvas->save();
- draw_list(canvas, blob, useDrawBehind);
- canvas->translate(0, 350);
- canvas->saveLayer({0, 0, 400, 320}, nullptr);
- draw_list(canvas, blob, useDrawBehind);
- canvas->restore();
- canvas->restore();
- canvas->translate(430, 0);
- }
- }
- #include "include/effects/SkGradientShader.h"
- DEF_SIMPLE_GM(savelayer_f16, canvas, 900, 300) {
- int n = 15;
- SkRect r{0, 0, 300, 300};
- SkPaint paint;
- const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorRED };
- paint.setShader(SkGradientShader::MakeSweep(r.centerX(), r.centerY(),
- colors, nullptr, SK_ARRAY_COUNT(colors)));
- canvas->drawOval(r, paint);
- paint.setAlphaf(1.0f/n);
- paint.setBlendMode(SkBlendMode::kPlus);
- for (auto flags : {0, (int)SkCanvas::kF16ColorType}) {
- canvas->translate(r.width(), 0);
- SkCanvas::SaveLayerRec rec;
- rec.fSaveLayerFlags = flags;
- canvas->saveLayer(rec);
- for (int i = 0; i < n; ++i) {
- canvas->drawOval(r, paint);
- }
- canvas->restore();
- }
- }
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