DEF_GPUTEST_FOR_NATIVE_CONTEXT(SkImage_NewFromTexture, reporter, context) {
GrTextureProvider* provider = context->textureProvider();
const int w = 10;
const int h = 10;
SkPMColor storage[w * h];
const SkPMColor expected0 = SkPreMultiplyColor(SK_ColorRED);
sk_memset32(storage, expected0, w * h);
GrSurfaceDesc desc;
desc.fFlags = kRenderTarget_GrSurfaceFlag; // needs to be a rendertarget for readpixels();
desc.fOrigin = kDefault_GrSurfaceOrigin;
desc.fWidth = w;
desc.fHeight = h;
desc.fConfig = kSkia8888_GrPixelConfig;
desc.fSampleCnt = 0;
SkAutoTUnref<GrTexture> tex(provider->createTexture(desc, false, storage, w * 4));
if (!tex) {
REPORTER_ASSERT(reporter, false);
return;
}
GrBackendTextureDesc backendDesc;
backendDesc.fConfig = kSkia8888_GrPixelConfig;
backendDesc.fFlags = kRenderTarget_GrBackendTextureFlag;
backendDesc.fWidth = w;
backendDesc.fHeight = h;
backendDesc.fSampleCnt = 0;
backendDesc.fTextureHandle = tex->getTextureHandle();
TextureReleaseChecker releaseChecker;
SkAutoTUnref<SkImage> refImg(
SkImage::NewFromTexture(context, backendDesc, kPremul_SkAlphaType,
TextureReleaseChecker::Release, &releaseChecker));
SkAutoTUnref<SkImage> cpyImg(SkImage::NewFromTextureCopy(context, backendDesc,
kPremul_SkAlphaType));
check_image_color(reporter, refImg, expected0);
check_image_color(reporter, cpyImg, expected0);
// Now lets jam new colors into our "external" texture, and see if the images notice
const SkPMColor expected1 = SkPreMultiplyColor(SK_ColorBLUE);
sk_memset32(storage, expected1, w * h);
tex->writePixels(0, 0, w, h, kSkia8888_GrPixelConfig, storage, GrContext::kFlushWrites_PixelOp);
// The cpy'd one should still see the old color
#if 0
// There is no guarantee that refImg sees the new color. We are free to have made a copy. Our
// write pixels call violated the contract with refImg and refImg is now undefined.
check_image_color(reporter, refImg, expected1);
#endif
check_image_color(reporter, cpyImg, expected0);
// Now exercise the release proc
REPORTER_ASSERT(reporter, 0 == releaseChecker.fReleaseCount);
refImg.reset(nullptr); // force a release of the image
REPORTER_ASSERT(reporter, 1 == releaseChecker.fReleaseCount);
}
DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(SRGBMipMaps, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
if (!context->caps()->srgbSupport()) {
return;
}
const int rtS = 16;
const int texS = rtS * 2;
// Fill texture with a dither of black and 60% sRGB (~ 32.5% linear) gray. Although there is
// only one likely failure mode (doing a direct downsample of the sRGB values), this pattern
// maximizes the minimum error across all three conceivable failure modes:
// 1) Likely incorrect:
// (A + B) / 2
// 2) No input decode, decode output:
// linear_to_srgb((A + B) / 2)
// 3) Decode input, no output encode:
// (srgb_to_linear(A) + srgb_to_linear(B)) / 2
const U8CPU srgb60 = sk_float_round2int(0.6f * 255.0f);
static const SkPMColor colors[2] = {
SkPackARGB32(0xFF, srgb60, srgb60, srgb60),
SkPackARGB32(0xFF, 0x00, 0x00, 0x00)
};
uint32_t texData[texS * texS];
for (int y = 0; y < texS; ++y) {
for (int x = 0; x < texS; ++x) {
texData[y * texS + x] = colors[(x + y) % 2];
}
}
// We can be pretty generous with the error detection, thanks to the choice of input.
// The closest likely failure mode is off by > 0.1, so anything that encodes within
// 10/255 of optimal is more than good enough for this test.
const U8CPU expectedSRGB = sk_float_round2int(
linear_to_srgb(srgb_to_linear(srgb60 / 255.0f) / 2.0f) * 255.0f);
const U8CPU expectedLinear = srgb60 / 2;
const U8CPU error = 10;
// Create our test texture
GrSurfaceDesc desc;
desc.fFlags = kNone_GrSurfaceFlags;
desc.fConfig = kSRGBA_8888_GrPixelConfig;
desc.fWidth = texS;
desc.fHeight = texS;
GrTextureProvider* texProvider = context->textureProvider();
SkAutoTUnref<GrTexture> texture(texProvider->createTexture(desc, SkBudgeted::kNo, texData, 0));
// Create two render target contexts (L32 and S32)
sk_sp<SkColorSpace> srgbColorSpace = SkColorSpace::MakeNamed(SkColorSpace::kSRGB_Named);
sk_sp<GrRenderTargetContext> l32RenderTargetContext = context->makeRenderTargetContext(
SkBackingFit::kExact, rtS, rtS, kRGBA_8888_GrPixelConfig, nullptr);
sk_sp<GrRenderTargetContext> s32RenderTargetContext = context->makeRenderTargetContext(
SkBackingFit::kExact, rtS, rtS, kSRGBA_8888_GrPixelConfig, std::move(srgbColorSpace));
SkRect rect = SkRect::MakeWH(SkIntToScalar(rtS), SkIntToScalar(rtS));
GrNoClip noClip;
GrPaint paint;
paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
GrTextureParams mipMapParams(SkShader::kRepeat_TileMode, GrTextureParams::kMipMap_FilterMode);
paint.addColorTextureProcessor(texture, nullptr, SkMatrix::MakeScale(0.5f), mipMapParams);
// 1) Draw texture to S32 surface (should generate/use sRGB mips)
paint.setGammaCorrect(true);
s32RenderTargetContext->drawRect(noClip, paint, SkMatrix::I(), rect);
read_and_check_pixels(reporter, s32RenderTargetContext->asTexture().get(), expectedSRGB, error,
"first render of sRGB");
// 2) Draw texture to L32 surface (should generate/use linear mips)
paint.setGammaCorrect(false);
l32RenderTargetContext->drawRect(noClip, paint, SkMatrix::I(), rect);
read_and_check_pixels(reporter, l32RenderTargetContext->asTexture().get(), expectedLinear,
error, "re-render as linear");
// 3) Go back to sRGB
paint.setGammaCorrect(true);
s32RenderTargetContext->drawRect(noClip, paint, SkMatrix::I(), rect);
read_and_check_pixels(reporter, s32RenderTargetContext->asTexture().get(), expectedSRGB, error,
"re-render as sRGB");
}
