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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.h"
// 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) {
static const uint32_t kSecretDeprecated_DontClipToLayerFlag = 1U << 31;
SkRect rect = SkRect::MakeLTRB(l, t, r, b);
canvas->saveLayer({ &rect, nullptr, nullptr, kSecretDeprecated_DontClipToLayerFlag });
}
static void do_draw(SkCanvas* canvas) {
SkPaint paint;
SkRandom rand;
for (int i = 0; i < 20; ++i) {
paint.setColor(sk_tool_utils::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);)
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