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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
#if SK_SUPPORT_GPU
#include "GrFragmentProcessor.h"
#include "GrInvariantOutput.h"
#include "GrRenderTargetContext.h"
#include "GrTexture.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ImageStorageLoad, reporter, ctxInfo) {
class TestFP : public GrFragmentProcessor {
public:
static sk_sp<GrFragmentProcessor> Make(sk_sp<GrTexture> texture) {
return sk_sp<GrFragmentProcessor>(new TestFP(std::move(texture)));
}
const char* name() const override { return "Image Load Test FP"; }
private:
TestFP(sk_sp<GrTexture> texture) : fImageStorageAccess(std::move(texture), kRead_GrIOType) {
this->initClassID<TestFP>();
this->setWillReadFragmentPosition();
this->addImageStorageAccess(&fImageStorageAccess);
}
void onGetGLSLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override {}
void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
inout->setToUnknown(GrInvariantOutput::kWillNot_ReadInput);
}
bool onIsEqual(const GrFragmentProcessor& that) const override { return true; }
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
class GLSLProcessor : public GrGLSLFragmentProcessor {
public:
GLSLProcessor() = default;
void emitCode(EmitArgs& args) override {
const TestFP& tfp = args.fFp.cast<TestFP>();
GrGLSLFPFragmentBuilder* fb = args.fFragBuilder;
SkString imageLoadStr;
fb->codeAppendf("vec2 coord = %s.xy;", args.fFragBuilder->fragmentPosition());
fb->appendImageStorageLoad(&imageLoadStr, args.fImageStorages[0],
"ivec2(coord)");
if (GrPixelConfigIsSint(tfp.fImageStorageAccess.texture()->config())) {
// Map the signed bytes so that when then get read back as unorm values they
// will have their original bit pattern.
fb->codeAppendf("ivec4 ivals = %s;", imageLoadStr.c_str());
// NV gives a linker error for this:
// fb->codeAppend("ivals +=
// "mix(ivec4(0), ivec4(256), lessThan(ivals, ivec4(0)));");
fb->codeAppend("if (ivals.r < 0) { ivals.r += 256; }");
fb->codeAppend("if (ivals.g < 0) { ivals.g += 256; }");
fb->codeAppend("if (ivals.b < 0) { ivals.b += 256; }");
fb->codeAppend("if (ivals.a < 0) { ivals.a += 256; }");
fb->codeAppendf("%s = (vec4(ivals) + vec4(0.5))/255;", args.fOutputColor);
} else {
fb->codeAppendf("%s = %s;", args.fOutputColor, imageLoadStr.c_str());
}
}
};
return new GLSLProcessor;
}
ImageStorageAccess fImageStorageAccess;
};
static constexpr int kS = 256;
GrContext* context = ctxInfo.grContext();
if (!context->caps()->shaderCaps()->imageLoadStoreSupport()) {
return;
}
std::unique_ptr<uint32_t[]> data(new uint32_t[kS * kS]);
for (int j = 0; j < kS; ++j) {
for (int i = 0; i < kS; ++i) {
data[i + kS * j] = GrColorPackRGBA(i, j, 0, 0);
}
}
std::unique_ptr<uint32_t[]> idata(new uint32_t[kS * kS]);
for (int j = 0; j < kS; ++j) {
for (int i = 0; i < kS; ++i) {
int8_t r = i - 128;
int8_t g = j - 128;
int8_t b = -128;
int8_t a = -128;
idata[i + kS * j] = ((uint8_t)a << 24) | ((uint8_t)b << 16) |
((uint8_t)g << 8) | (uint8_t)r;
}
}
// Currently image accesses always have "top left" semantics.
GrSurfaceDesc desc;
desc.fOrigin = kTopLeft_GrSurfaceOrigin;
desc.fWidth = kS;
desc.fHeight = kS;
struct {
GrPixelConfig fConfig;
std::unique_ptr<uint32_t[]> fData;
} tests[] = {
{
kRGBA_8888_GrPixelConfig,
std::move(data)
},
{
kRGBA_8888_sint_GrPixelConfig,
std::move(idata)
},
};
for (const auto& test : tests) {
desc.fConfig = test.fConfig;
sk_sp<GrTexture> imageStorageTexture(context->textureProvider()->createTexture(desc,
SkBudgeted::kYes, test.fData.get(), 0));
sk_sp<GrRenderTargetContext> rtContext =
context->makeRenderTargetContext(SkBackingFit::kExact, kS, kS, kRGBA_8888_GrPixelConfig,
nullptr);
GrPaint paint;
paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
paint.addColorFragmentProcessor(TestFP::Make(imageStorageTexture));
rtContext->drawPaint(GrNoClip(), paint, SkMatrix::I());
std::unique_ptr<uint32_t[]> readData(new uint32_t[kS * kS]);
SkImageInfo info = SkImageInfo::Make(kS, kS, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
rtContext->readPixels(info, readData.get(), 0, 0, 0);
int failed = false;
for (int j = 0; j < kS && !failed; ++j) {
for (int i = 0; i < kS && !failed; ++i) {
uint32_t d = test.fData[j * kS + i];
uint32_t rd = readData[j * kS + i];
if (d != rd) {
failed = true;
#if 0 // This test currently fails on a number of GPUs, under investigation.
ERRORF(reporter, "Expected 0x%08x, got 0x%08x at %d, %d.", d, rd, i, j);
#endif
}
}
}
}
}
#endif
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