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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrTest.h"
#include "effects/GrYUVtoRGBEffect.h"
#include "SkBitmap.h"
#include "SkGr.h"
#include "SkGradientShader.h"
#define YSIZE 8
#define USIZE 4
#define VSIZE 4
namespace skiagm {
/**
* This GM directly exercises GrYUVtoRGBEffect.
*/
class YUVtoRGBEffect : public GM {
public:
YUVtoRGBEffect() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("yuv_to_rgb_effect");
}
SkISize onISize() override {
return SkISize::Make(238, 120);
}
void onOnceBeforeDraw() override {
SkImageInfo yinfo = SkImageInfo::MakeA8(YSIZE, YSIZE);
fBmp[0].allocPixels(yinfo);
SkImageInfo uinfo = SkImageInfo::MakeA8(USIZE, USIZE);
fBmp[1].allocPixels(uinfo);
SkImageInfo vinfo = SkImageInfo::MakeA8(VSIZE, VSIZE);
fBmp[2].allocPixels(vinfo);
unsigned char* pixels[3];
for (int i = 0; i < 3; ++i) {
pixels[i] = (unsigned char*)fBmp[i].getPixels();
}
int color[] = {0, 85, 170};
const int limit[] = {255, 0, 255};
const int invl[] = {0, 255, 0};
const int inc[] = {1, -1, 1};
for (int i = 0; i < 3; ++i) {
const size_t nbBytes = fBmp[i].rowBytes() * fBmp[i].height();
for (size_t j = 0; j < nbBytes; ++j) {
pixels[i][j] = (unsigned char)color[i];
color[i] = (color[i] == limit[i]) ? invl[i] : color[i] + inc[i];
}
}
}
void onDraw(SkCanvas* canvas) override {
GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget();
if (nullptr == rt) {
return;
}
GrContext* context = rt->getContext();
if (nullptr == context) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrTestTarget tt;
context->getTestTarget(&tt);
if (nullptr == tt.target()) {
SkDEBUGFAIL("Couldn't get Gr test target.");
return;
}
SkAutoTUnref<GrTexture> texture[3];
texture[0].reset(GrRefCachedBitmapTexture(context, fBmp[0],
GrTextureParams::ClampBilerp()));
texture[1].reset(GrRefCachedBitmapTexture(context, fBmp[1],
GrTextureParams::ClampBilerp()));
texture[2].reset(GrRefCachedBitmapTexture(context, fBmp[2],
GrTextureParams::ClampBilerp()));
if (!texture[0] || !texture[1] || !texture[2]) {
return;
}
static const SkScalar kDrawPad = 10.f;
static const SkScalar kTestPad = 10.f;
static const SkScalar kColorSpaceOffset = 36.f;
SkISize sizes[3] = {{YSIZE, YSIZE}, {USIZE, USIZE}, {VSIZE, VSIZE}};
for (int space = kJPEG_SkYUVColorSpace; space <= kLastEnum_SkYUVColorSpace;
++space) {
SkRect renderRect = SkRect::MakeWH(SkIntToScalar(fBmp[0].width()),
SkIntToScalar(fBmp[0].height()));
renderRect.outset(kDrawPad, kDrawPad);
SkScalar y = kDrawPad + kTestPad + space * kColorSpaceOffset;
SkScalar x = kDrawPad + kTestPad;
const int indices[6][3] = {{0, 1, 2}, {0, 2, 1}, {1, 0, 2},
{1, 2, 0}, {2, 0, 1}, {2, 1, 0}};
for (int i = 0; i < 6; ++i) {
GrPipelineBuilder pipelineBuilder;
SkAutoTUnref<GrFragmentProcessor> fp(
GrYUVtoRGBEffect::Create(texture[indices[i][0]],
texture[indices[i][1]],
texture[indices[i][2]],
sizes,
static_cast<SkYUVColorSpace>(space)));
if (fp) {
SkMatrix viewMatrix;
viewMatrix.setTranslate(x, y);
pipelineBuilder.setRenderTarget(rt);
pipelineBuilder.addColorFragmentProcessor(fp);
tt.target()->drawNonAARect(pipelineBuilder,
GrColor_WHITE,
viewMatrix,
renderRect);
}
x += renderRect.width() + kTestPad;
}
}
}
private:
SkBitmap fBmp[3];
typedef GM INHERITED;
};
DEF_GM(return new YUVtoRGBEffect;)
}
#endif
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