blob: 2e4b1c92420c3f0e68c333be486f0f9862ed16d1 [file] [log] [blame]
/*
* Copyright 2019 Google LLC.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/effects/SkGradientShader.h"
#include "src/core/SkMatrixProvider.h"
#include "src/gpu/GrDirectContextPriv.h"
#include "src/gpu/SkGr.h"
#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
#include "src/gpu/ops/GrFillRectOp.h"
#include "tools/Resources.h"
class SampleMatrixConstantEffect : public GrFragmentProcessor {
public:
static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 1;
SampleMatrixConstantEffect(std::unique_ptr<GrFragmentProcessor> child)
: INHERITED(CLASS_ID, kNone_OptimizationFlags) {
this->registerChild(std::move(child),
SkSL::SampleUsage::UniformMatrix(
"float3x3(float3(0.5, 0.0, 0.0), "
"float3(0.0, 0.5, 0.0), "
"float3(0.0, 0.0, 1.0))"));
}
const char* name() const override { return "SampleMatrixConstantEffect"; }
std::unique_ptr<GrFragmentProcessor> clone() const override {
SkASSERT(false);
return nullptr;
}
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {}
bool onIsEqual(const GrFragmentProcessor& that) const override { return this == &that; }
private:
std::unique_ptr<GrGLSLFragmentProcessor> onMakeProgramImpl() const override;
using INHERITED = GrFragmentProcessor;
};
class GLSLSampleMatrixConstantEffect : public GrGLSLFragmentProcessor {
void emitCode(EmitArgs& args) override {
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
SkString sample = this->invokeChildWithMatrix(0, args);
fragBuilder->codeAppendf("return %s;\n", sample.c_str());
}
};
std::unique_ptr<GrGLSLFragmentProcessor> SampleMatrixConstantEffect::onMakeProgramImpl() const {
return std::make_unique<GLSLSampleMatrixConstantEffect>();
}
DEF_SIMPLE_GPU_GM(sample_matrix_constant, ctx, rtCtx, canvas, 1024, 256) {
auto wrap = [](std::unique_ptr<GrFragmentProcessor> baseFP) {
return std::unique_ptr<GrFragmentProcessor>(
new SampleMatrixConstantEffect(std::move(baseFP)));
};
auto draw = [rtCtx, &wrap](std::unique_ptr<GrFragmentProcessor> baseFP, int tx, int ty) {
auto fp = wrap(std::move(baseFP));
GrPaint paint;
paint.setColorFragmentProcessor(std::move(fp));
rtCtx->drawRect(nullptr, std::move(paint), GrAA::kNo, SkMatrix::Translate(tx, ty),
SkRect::MakeIWH(256, 256));
};
auto draw2 = [rtCtx, &wrap](std::unique_ptr<GrFragmentProcessor> baseFP, int tx, int ty) {
auto fp = wrap(wrap(std::move(baseFP)));
GrPaint paint;
paint.setColorFragmentProcessor(std::move(fp));
rtCtx->drawRect(nullptr, std::move(paint), GrAA::kNo, SkMatrix::Translate(tx, ty),
SkRect::MakeIWH(256, 256));
};
{
SkBitmap bmp;
GetResourceAsBitmap("images/mandrill_256.png", &bmp);
auto [view, ct] = GrMakeCachedBitmapProxyView(ctx, bmp, GrMipmapped::kNo);
std::unique_ptr<GrFragmentProcessor> imgFP = GrTextureEffect::Make(view,
bmp.alphaType(),
SkMatrix());
draw(std::move(imgFP), 0, 0);
imgFP = GrTextureEffect::Make(std::move(view), bmp.alphaType(), SkMatrix());
draw2(std::move(imgFP), 256, 0);
}
{
static constexpr SkColor colors[] = { 0xff00ff00, 0xffff00ff };
const SkPoint pts[] = {{ 0, 0 }, { 256, 0 }};
auto shader = SkGradientShader::MakeLinear(pts, colors, nullptr,
SK_ARRAY_COUNT(colors),
SkTileMode::kClamp);
SkMatrix matrix;
SkSimpleMatrixProvider matrixProvider(matrix);
GrColorInfo colorInfo;
GrFPArgs args(ctx, matrixProvider, &colorInfo);
std::unique_ptr<GrFragmentProcessor> gradientFP = as_SB(shader)->asFragmentProcessor(args);
draw(std::move(gradientFP), 512, 0);
gradientFP = as_SB(shader)->asFragmentProcessor(args);
draw2(std::move(gradientFP), 768, 0);
}
}