afe3005be3
Restructure SkGpuDevice creation: *SkSurfaceProps are optional. *Use SkSurfaceProps to communicate DF text rather than a flag. *Tell SkGpuDevice::Create whether RT comes from cache or not. Review URL: https://codereview.chromium.org/848903004
96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/*
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* Copyright 2014 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 "gm.h"
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#include "SkCanvas.h"
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#include "SkColorShader.h"
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#include "SkPaint.h"
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#include "SkSurface.h"
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#if SK_SUPPORT_GPU
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namespace skiagm {
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/*
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* This GM exercises SkCanvas::discard() by creating an offscreen SkSurface and repeatedly
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* discarding it, drawing to it, and then drawing it to the main canvas.
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*/
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class DiscardGM : public GM {
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public:
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DiscardGM() {
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}
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uint32_t onGetFlags() const SK_OVERRIDE { return kGPUOnly_Flag; }
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protected:
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SkString onShortName() SK_OVERRIDE {
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return SkString("discard");
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}
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SkISize onISize() SK_OVERRIDE {
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return SkISize::Make(100, 100);
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}
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void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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GrContext* context = canvas->getGrContext();
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if (NULL == context) {
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return;
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}
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SkISize size = this->getISize();
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size.fWidth /= 10;
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size.fHeight /= 10;
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SkImageInfo info = SkImageInfo::MakeN32Premul(size);
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SkSurface* surface = SkSurface::NewRenderTarget(context, SkSurface::kNo_Budgeted, info);
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if (NULL == surface) {
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return;
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}
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canvas->clear(SK_ColorBLACK);
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SkRandom rand;
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for (int x = 0; x < 10; ++x) {
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for (int y = 0; y < 10; ++y) {
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surface->getCanvas()->discard();
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// Make something that isn't too close to the background color, black.
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SkColor color = rand.nextU() | 0xFF404040;
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switch (rand.nextULessThan(3)) {
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case 0:
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surface->getCanvas()->drawColor(color);
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break;
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case 1:
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surface->getCanvas()->clear(color);
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break;
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case 2:
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SkColorShader shader(color);
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SkPaint paint;
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paint.setShader(&shader);
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surface->getCanvas()->drawPaint(paint);
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break;
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}
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surface->draw(canvas, 10.f*x, 10.f*y, NULL);
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}
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}
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surface->getCanvas()->discard();
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surface->unref();
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return SkNEW(DiscardGM); )
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} // end namespace
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#endif
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