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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkAlphaType.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkFlattenable.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/private/SkSLSampleUsage.h"
#include "src/core/SkArenaAlloc.h"
#include "src/core/SkColorFilterBase.h"
#include "src/core/SkEffectPriv.h"
#include "src/core/SkRasterPipeline.h"
#include "src/core/SkReadBuffer.h"
#include "src/core/SkWriteBuffer.h"
#include <cstdint>
#include <memory>
#include <tuple>
#include <utility>
#ifdef SK_GRAPHITE_ENABLED
#include "src/gpu/graphite/Image_Graphite.h"
#include "src/gpu/graphite/KeyContext.h"
#include "src/gpu/graphite/KeyHelpers.h"
#include "src/gpu/graphite/PaintParamsKey.h"
namespace skgpu::graphite {
class PipelineDataGatherer;
}
#endif
#if SK_SUPPORT_GPU
#include "include/gpu/GrTypes.h"
#include "src/gpu/ganesh/GrColorInfo.h"
#include "src/gpu/ganesh/GrFragmentProcessor.h"
#include "src/gpu/ganesh/GrProcessorUnitTest.h"
#include "src/gpu/ganesh/GrSurfaceProxyView.h"
#include "src/gpu/ganesh/SkGr.h"
#include "src/gpu/ganesh/effects/GrTextureEffect.h"
#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h"
class GrRecordingContext;
struct GrShaderCaps;
namespace skgpu { class KeyBuilder; }
#endif
#if GR_TEST_UTILS
#include "include/core/SkColorSpace.h"
#include "include/core/SkSurfaceProps.h"
#include "include/private/base/SkTo.h"
#include "include/private/gpu/ganesh/GrTypesPriv.h"
#include "include/utils/SkRandom.h"
#include "src/gpu/ganesh/GrTestUtils.h"
#else
class SkSurfaceProps;
#endif
#if defined(SK_ENABLE_SKSL)
#include "src/core/SkVM.h"
#endif
class SkTable_ColorFilter final : public SkColorFilterBase {
public:
SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[],
const uint8_t tableG[], const uint8_t tableB[]) {
fBitmap.allocPixels(SkImageInfo::MakeA8(256, 4));
uint8_t *a = fBitmap.getAddr8(0,0),
*r = fBitmap.getAddr8(0,1),
*g = fBitmap.getAddr8(0,2),
*b = fBitmap.getAddr8(0,3);
for (int i = 0; i < 256; i++) {
a[i] = tableA ? tableA[i] : i;
r[i] = tableR ? tableR[i] : i;
g[i] = tableG ? tableG[i] : i;
b[i] = tableB ? tableB[i] : i;
}
fBitmap.setImmutable();
}
#if SK_SUPPORT_GPU
GrFPResult asFragmentProcessor(std::unique_ptr<GrFragmentProcessor> inputFP,
GrRecordingContext*, const GrColorInfo&,
const SkSurfaceProps&) const override;
#endif
#ifdef SK_GRAPHITE_ENABLED
void addToKey(const skgpu::graphite::KeyContext&,
skgpu::graphite::PaintParamsKeyBuilder*,
skgpu::graphite::PipelineDataGatherer*) const override;
#endif
bool onAppendStages(const SkStageRec& rec, bool shaderIsOpaque) const override {
SkRasterPipeline* p = rec.fPipeline;
if (!shaderIsOpaque) {
p->append(SkRasterPipeline::unpremul);
}
SkRasterPipeline_TablesCtx* tables = rec.fAlloc->make<SkRasterPipeline_TablesCtx>();
tables->a = fBitmap.getAddr8(0, 0);
tables->r = fBitmap.getAddr8(0, 1);
tables->g = fBitmap.getAddr8(0, 2);
tables->b = fBitmap.getAddr8(0, 3);
p->append(SkRasterPipeline::byte_tables, tables);
bool definitelyOpaque = shaderIsOpaque && tables->a[0xff] == 0xff;
if (!definitelyOpaque) {
p->append(SkRasterPipeline::premul);
}
return true;
}
skvm::Color onProgram(skvm::Builder* p, skvm::Color c,
const SkColorInfo& dst,
skvm::Uniforms* uniforms, SkArenaAlloc*) const override {
auto apply_table_to_component = [&](skvm::F32 c, const uint8_t* bytePtr) -> skvm::F32 {
skvm::I32 index = to_unorm(8, clamp01(c));
skvm::Uniform table = uniforms->pushPtr(bytePtr);
return from_unorm(8, gather8(table, index));
};
c = unpremul(c);
c.a = apply_table_to_component(c.a, fBitmap.getAddr8(0,0));
c.r = apply_table_to_component(c.r, fBitmap.getAddr8(0,1));
c.g = apply_table_to_component(c.g, fBitmap.getAddr8(0,2));
c.b = apply_table_to_component(c.b, fBitmap.getAddr8(0,3));
return premul(c);
}
void flatten(SkWriteBuffer& buffer) const override {
buffer.writeByteArray(fBitmap.getAddr8(0,0), 4*256);
}
private:
friend void ::SkRegisterTableColorFilterFlattenable();
SK_FLATTENABLE_HOOKS(SkTable_ColorFilter)
SkBitmap fBitmap;
};
sk_sp<SkFlattenable> SkTable_ColorFilter::CreateProc(SkReadBuffer& buffer) {
uint8_t argb[4*256];
if (buffer.readByteArray(argb, sizeof(argb))) {
return SkColorFilters::TableARGB(argb+0*256, argb+1*256, argb+2*256, argb+3*256);
}
return nullptr;
}
#if SK_SUPPORT_GPU
class ColorTableEffect : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> inputFP,
GrRecordingContext* context,
const SkBitmap& bitmap);
~ColorTableEffect() override {}
const char* name() const override { return "ColorTableEffect"; }
std::unique_ptr<GrFragmentProcessor> clone() const override {
return std::unique_ptr<GrFragmentProcessor>(new ColorTableEffect(*this));
}
inline static constexpr int kTexEffectFPIndex = 0;
inline static constexpr int kInputFPIndex = 1;
private:
std::unique_ptr<ProgramImpl> onMakeProgramImpl() const override;
void onAddToKey(const GrShaderCaps&, skgpu::KeyBuilder*) const override {}
bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
ColorTableEffect(std::unique_ptr<GrFragmentProcessor> inputFP, GrSurfaceProxyView view);
explicit ColorTableEffect(const ColorTableEffect& that);
GR_DECLARE_FRAGMENT_PROCESSOR_TEST
using INHERITED = GrFragmentProcessor;
};
ColorTableEffect::ColorTableEffect(std::unique_ptr<GrFragmentProcessor> inputFP,
GrSurfaceProxyView view)
// Not bothering with table-specific optimizations.
: INHERITED(kColorTableEffect_ClassID, kNone_OptimizationFlags) {
this->registerChild(GrTextureEffect::Make(std::move(view), kUnknown_SkAlphaType),
SkSL::SampleUsage::Explicit());
this->registerChild(std::move(inputFP));
}
ColorTableEffect::ColorTableEffect(const ColorTableEffect& that)
: INHERITED(that) {}
std::unique_ptr<GrFragmentProcessor::ProgramImpl> ColorTableEffect::onMakeProgramImpl() const {
class Impl : public ProgramImpl {
public:
void emitCode(EmitArgs& args) override {
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
SkString inputColor = this->invokeChild(kInputFPIndex, args);
SkString a = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.a, 0.5)");
SkString r = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.r, 1.5)");
SkString g = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.g, 2.5)");
SkString b = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.b, 3.5)");
fragBuilder->codeAppendf(
"half4 coord = 255 * unpremul(%s) + 0.5;\n"
"half4 color = half4(%s.a, %s.a, %s.a, 1);\n"
"return color * %s.a;\n",
inputColor.c_str(), r.c_str(), g.c_str(), b.c_str(), a.c_str());
}
};
return std::make_unique<Impl>();
}
std::unique_ptr<GrFragmentProcessor> ColorTableEffect::Make(
std::unique_ptr<GrFragmentProcessor> inputFP,
GrRecordingContext* context, const SkBitmap& bitmap) {
SkASSERT(kPremul_SkAlphaType == bitmap.alphaType());
SkASSERT(bitmap.isImmutable());
auto view = std::get<0>(GrMakeCachedBitmapProxyView(context,
bitmap,
/*label=*/"MakeColorTableEffect",
GrMipmapped::kNo));
if (!view) {
return nullptr;
}
return std::unique_ptr<GrFragmentProcessor>(new ColorTableEffect(std::move(inputFP),
std::move(view)));
}
///////////////////////////////////////////////////////////////////////////////
GR_DEFINE_FRAGMENT_PROCESSOR_TEST(ColorTableEffect)
#if GR_TEST_UTILS
std::unique_ptr<GrFragmentProcessor> ColorTableEffect::TestCreate(GrProcessorTestData* d) {
int flags = 0;
uint8_t luts[256][4];
do {
for (int i = 0; i < 4; ++i) {
flags |= d->fRandom->nextBool() ? (1 << i): 0;
}
} while (!flags);
for (int i = 0; i < 4; ++i) {
if (flags & (1 << i)) {
for (int j = 0; j < 256; ++j) {
luts[j][i] = SkToU8(d->fRandom->nextBits(8));
}
}
}
auto filter(SkColorFilters::TableARGB(
(flags & (1 << 0)) ? luts[0] : nullptr,
(flags & (1 << 1)) ? luts[1] : nullptr,
(flags & (1 << 2)) ? luts[2] : nullptr,
(flags & (1 << 3)) ? luts[3] : nullptr
));
sk_sp<SkColorSpace> colorSpace = GrTest::TestColorSpace(d->fRandom);
SkSurfaceProps props; // default props for testing
auto [success, fp] = as_CFB(filter)->asFragmentProcessor(
d->inputFP(), d->context(),
GrColorInfo(GrColorType::kRGBA_8888, kUnknown_SkAlphaType, std::move(colorSpace)),
props);
SkASSERT(success);
return std::move(fp);
}
#endif
GrFPResult SkTable_ColorFilter::asFragmentProcessor(std::unique_ptr<GrFragmentProcessor> inputFP,
GrRecordingContext* context,
const GrColorInfo&,
const SkSurfaceProps&) const {
auto cte = ColorTableEffect::Make(std::move(inputFP), context, fBitmap);
return cte ? GrFPSuccess(std::move(cte)) : GrFPFailure(nullptr);
}
#endif // SK_SUPPORT_GPU
#ifdef SK_GRAPHITE_ENABLED
void SkTable_ColorFilter::addToKey(const skgpu::graphite::KeyContext& keyContext,
skgpu::graphite::PaintParamsKeyBuilder* builder,
skgpu::graphite::PipelineDataGatherer* gatherer) const {
using namespace skgpu::graphite;
TableColorFilterBlock::TableColorFilterData data;
// TODO(b/239604347): remove this hack. This is just here until we determine what Graphite's
// Recorder-level caching story is going to be.
sk_sp<SkImage> image = SkImage::MakeFromBitmap(fBitmap);
image = image->makeTextureImage(keyContext.recorder(), { skgpu::graphite::Mipmapped::kNo });
if (as_IB(image)->isGraphiteBacked()) {
skgpu::graphite::Image* grImage = static_cast<skgpu::graphite::Image*>(image.get());
auto [view, _] = grImage->asView(keyContext.recorder(), skgpu::graphite::Mipmapped::kNo);
data.fTextureProxy = view.refProxy();
}
TableColorFilterBlock::BeginBlock(keyContext, builder, gatherer, data);
builder->endBlock();
}
#endif
///////////////////////////////////////////////////////////////////////////////
sk_sp<SkColorFilter> SkColorFilters::Table(const uint8_t table[256]) {
return sk_make_sp<SkTable_ColorFilter>(table, table, table, table);
}
sk_sp<SkColorFilter> SkColorFilters::TableARGB(const uint8_t tableA[256],
const uint8_t tableR[256],
const uint8_t tableG[256],
const uint8_t tableB[256]) {
if (!tableA && !tableR && !tableG && !tableB) {
return nullptr;
}
return sk_make_sp<SkTable_ColorFilter>(tableA, tableR, tableG, tableB);
}
void SkRegisterTableColorFilterFlattenable() {
SK_REGISTER_FLATTENABLE(SkTable_ColorFilter);
}