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skia2/gm/yuvtorgbeffect.cpp
mtklein dbfd7ab108 Replace a lot of 'static const' with 'constexpr' or 'const'. 
'static const' means, there must be at most one of these, and initialize it at
compile time if possible or runtime if necessary.  This leads to unexpected
code execution, and TSAN* will complain about races on the guard variables.

Generally 'constexpr' or 'const' are better choices.  Neither can cause races:
they're either intialized at compile time (constexpr) or intialized each time
independently (const).

This CL prefers constexpr where possible, and uses const where not.  It even
prefers constexpr over const where they don't make a difference... I want to have
lots of examples of constexpr for people to see and mimic.

The scoped-to-class static has nothing to do with any of this, and is not changed.

* Not yet on the bots, which use an older TSAN.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2300623005

Review-Url: https://codereview.chromium.org/2300623005
2016-09-01 11:24:54 -07:00

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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 "GrDrawContextPriv.h"
#include "SkBitmap.h"
#include "SkGr.h"
#include "SkGradientShader.h"
#include "batches/GrDrawBatch.h"
#include "batches/GrRectBatchFactory.h"
#include "effects/GrYUVEffect.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 {
GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
if (!drawContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
SkAutoTUnref<GrTexture> texture[3];
texture[0].reset(GrRefCachedBitmapTexture(context, fBmp[0],
GrTextureParams::ClampBilerp(),
SkSourceGammaTreatment::kRespect));
texture[1].reset(GrRefCachedBitmapTexture(context, fBmp[1],
GrTextureParams::ClampBilerp(),
SkSourceGammaTreatment::kRespect));
texture[2].reset(GrRefCachedBitmapTexture(context, fBmp[2],
GrTextureParams::ClampBilerp(),
SkSourceGammaTreatment::kRespect));
if (!texture[0] || !texture[1] || !texture[2]) {
return;
}
constexpr SkScalar kDrawPad = 10.f;
constexpr SkScalar kTestPad = 10.f;
constexpr 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) {
GrPaint grPaint;
grPaint.setXPFactory(GrPorterDuffXPFactory::Make(SkXfermode::kSrc_Mode));
sk_sp<GrFragmentProcessor> fp(GrYUVEffect::MakeYUVToRGB(
texture[indices[i][0]], texture[indices[i][1]], texture[indices[i][2]], sizes,
static_cast<SkYUVColorSpace>(space), false));
if (fp) {
SkMatrix viewMatrix;
viewMatrix.setTranslate(x, y);
grPaint.addColorFragmentProcessor(std::move(fp));
SkAutoTUnref<GrDrawBatch> batch(
GrRectBatchFactory::CreateNonAAFill(GrColor_WHITE, viewMatrix,
renderRect, nullptr, nullptr));
drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch);
}
x += renderRect.width() + kTestPad;
}
}
}
private:
SkBitmap fBmp[3];
typedef GM INHERITED;
};
DEF_GM(return new YUVtoRGBEffect;)
//////////////////////////////////////////////////////////////////////////////
class YUVNV12toRGBEffect : public GM {
public:
YUVNV12toRGBEffect() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("yuv_nv12_to_rgb_effect");
}
SkISize onISize() override {
return SkISize::Make(48, 120);
}
void onOnceBeforeDraw() override {
SkImageInfo yinfo = SkImageInfo::MakeA8(YSIZE, YSIZE);
fBmp[0].allocPixels(yinfo);
SkImageInfo uvinfo = SkImageInfo::MakeN32Premul(USIZE, USIZE);
fBmp[1].allocPixels(uvinfo);
int color[] = {0, 85, 170};
const int limit[] = {255, 0, 255};
const int invl[] = {0, 255, 0};
const int inc[] = {1, -1, 1};
{
unsigned char* pixels = (unsigned char*)fBmp[0].getPixels();
const size_t nbBytes = fBmp[0].rowBytes() * fBmp[0].height();
for (size_t j = 0; j < nbBytes; ++j) {
pixels[j] = (unsigned char)color[0];
color[0] = (color[0] == limit[0]) ? invl[0] : color[0] + inc[0];
}
}
{
for (int y = 0; y < fBmp[1].height(); ++y) {
uint32_t* pixels = fBmp[1].getAddr32(0, y);
for (int j = 0; j < fBmp[1].width(); ++j) {
pixels[j] = SkColorSetARGB(0, color[1], color[2], 0);
color[1] = (color[1] == limit[1]) ? invl[1] : color[1] + inc[1];
color[2] = (color[2] == limit[2]) ? invl[2] : color[2] + inc[2];
}
}
}
}
void onDraw(SkCanvas* canvas) override {
GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
if (!drawContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
SkAutoTUnref<GrTexture> texture[3];
texture[0].reset(GrRefCachedBitmapTexture(context, fBmp[0], GrTextureParams::ClampBilerp(),
SkSourceGammaTreatment::kRespect));
texture[1].reset(GrRefCachedBitmapTexture(context, fBmp[1], GrTextureParams::ClampBilerp(),
SkSourceGammaTreatment::kRespect));
texture[2].reset(GrRefCachedBitmapTexture(context, fBmp[1], GrTextureParams::ClampBilerp(),
SkSourceGammaTreatment::kRespect));
if (!texture[0] || !texture[1] || !texture[2]) {
return;
}
constexpr SkScalar kDrawPad = 10.f;
constexpr SkScalar kTestPad = 10.f;
constexpr 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;
GrPaint grPaint;
grPaint.setXPFactory(GrPorterDuffXPFactory::Make(SkXfermode::kSrc_Mode));
sk_sp<GrFragmentProcessor> fp(
GrYUVEffect::MakeYUVToRGB(texture[0], texture[1], texture[2], sizes,
static_cast<SkYUVColorSpace>(space), true));
if (fp) {
SkMatrix viewMatrix;
viewMatrix.setTranslate(x, y);
grPaint.addColorFragmentProcessor(fp);
SkAutoTUnref<GrDrawBatch> batch(GrRectBatchFactory::CreateNonAAFill(
GrColor_WHITE, viewMatrix, renderRect, nullptr, nullptr));
drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch);
}
}
}
private:
SkBitmap fBmp[2];
typedef GM INHERITED;
};
DEF_GM(return new YUVNV12toRGBEffect;)
}
#endif
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