149 lines
4.8 KiB
C++
149 lines
4.8 KiB
C++
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/*
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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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// This test only works with the GPU backend.
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#include "gm.h"
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#if SK_SUPPORT_GPU
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#include "GrContext.h"
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#include "GrTest.h"
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#include "effects/GrYUVtoRGBEffect.h"
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#include "SkBitmap.h"
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#include "SkGr.h"
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#include "SkGradientShader.h"
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#define YSIZE 8
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#define USIZE 4
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#define VSIZE 4
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namespace skiagm {
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/**
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* This GM directly exercises GrYUVtoRGBEffect.
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*/
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class YUVtoRGBEffect : public GM {
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public:
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YUVtoRGBEffect() {
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this->setBGColor(0xFFFFFFFF);
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}
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protected:
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SkString onShortName() override {
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return SkString("yuv_to_rgb_effect");
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}
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SkISize onISize() override {
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return SkISize::Make(238, 120);
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}
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void onOnceBeforeDraw() override {
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SkImageInfo yinfo = SkImageInfo::MakeA8(YSIZE, YSIZE);
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fBmp[0].allocPixels(yinfo);
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SkImageInfo uinfo = SkImageInfo::MakeA8(USIZE, USIZE);
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fBmp[1].allocPixels(uinfo);
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SkImageInfo vinfo = SkImageInfo::MakeA8(VSIZE, VSIZE);
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fBmp[2].allocPixels(vinfo);
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unsigned char* pixels[3];
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for (int i = 0; i < 3; ++i) {
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pixels[i] = (unsigned char*)fBmp[i].getPixels();
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}
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int color[] = {0, 85, 170};
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const int limit[] = {255, 0, 255};
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const int invl[] = {0, 255, 0};
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const int inc[] = {1, -1, 1};
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for (int i = 0; i < 3; ++i) {
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const size_t nbBytes = fBmp[i].rowBytes() * fBmp[i].height();
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for (size_t j = 0; j < nbBytes; ++j) {
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pixels[i][j] = (unsigned char)color[i];
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color[i] = (color[i] == limit[i]) ? invl[i] : color[i] + inc[i];
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}
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}
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}
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void onDraw(SkCanvas* canvas) override {
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GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget();
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if (nullptr == rt) {
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return;
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}
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GrContext* context = rt->getContext();
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if (nullptr == context) {
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skiagm::GM::DrawGpuOnlyMessage(canvas);
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return;
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}
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GrTestTarget tt;
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context->getTestTarget(&tt);
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if (nullptr == tt.target()) {
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SkDEBUGFAIL("Couldn't get Gr test target.");
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return;
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}
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SkAutoTUnref<GrTexture> texture[3];
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texture[0].reset(GrRefCachedBitmapTexture(context, fBmp[0],
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GrTextureParams::ClampBilerp()));
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texture[1].reset(GrRefCachedBitmapTexture(context, fBmp[1],
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GrTextureParams::ClampBilerp()));
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texture[2].reset(GrRefCachedBitmapTexture(context, fBmp[2],
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GrTextureParams::ClampBilerp()));
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if (!texture[0] || !texture[1] || !texture[2]) {
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return;
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}
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static const SkScalar kDrawPad = 10.f;
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static const SkScalar kTestPad = 10.f;
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static const SkScalar kColorSpaceOffset = 36.f;
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SkISize sizes[3] = {{YSIZE, YSIZE}, {USIZE, USIZE}, {VSIZE, VSIZE}};
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for (int space = kJPEG_SkYUVColorSpace; space <= kLastEnum_SkYUVColorSpace;
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++space) {
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SkRect renderRect = SkRect::MakeWH(SkIntToScalar(fBmp[0].width()),
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SkIntToScalar(fBmp[0].height()));
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renderRect.outset(kDrawPad, kDrawPad);
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SkScalar y = kDrawPad + kTestPad + space * kColorSpaceOffset;
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SkScalar x = kDrawPad + kTestPad;
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const int indices[6][3] = {{0, 1, 2}, {0, 2, 1}, {1, 0, 2},
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{1, 2, 0}, {2, 0, 1}, {2, 1, 0}};
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for (int i = 0; i < 6; ++i) {
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GrPipelineBuilder pipelineBuilder;
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SkAutoTUnref<GrFragmentProcessor> fp(
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GrYUVtoRGBEffect::Create(texture[indices[i][0]],
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texture[indices[i][1]],
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texture[indices[i][2]],
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sizes,
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static_cast<SkYUVColorSpace>(space)));
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if (fp) {
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SkMatrix viewMatrix;
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viewMatrix.setTranslate(x, y);
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pipelineBuilder.setRenderTarget(rt);
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pipelineBuilder.addColorFragmentProcessor(fp);
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tt.target()->drawNonAARect(pipelineBuilder,
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GrColor_WHITE,
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viewMatrix,
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renderRect);
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}
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x += renderRect.width() + kTestPad;
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}
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}
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}
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private:
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SkBitmap fBmp[3];
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typedef GM INHERITED;
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};
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DEF_GM(return new YUVtoRGBEffect;)
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}
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#endif
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