blob: ac7ab20fa7828b37d54df97e92a9c8ae14c50cf4 [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/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypes.h"
#include "src/gpu/GrBitmapTextureMaker.h"
#include "src/gpu/GrCaps.h"
#include "src/gpu/GrDirectContextPriv.h"
#include "src/gpu/GrFragmentProcessor.h"
#include "src/gpu/GrSurfaceDrawContext.h"
#include "src/gpu/effects/GrRRectEffect.h"
#include "src/gpu/effects/GrSkSLFP.h"
#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
#include "src/gpu/ops/GrFillRectOp.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
class SampleCoordEffect : public GrFragmentProcessor {
public:
static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 0;
SampleCoordEffect(std::unique_ptr<GrFragmentProcessor> child)
: INHERITED(CLASS_ID, kNone_OptimizationFlags) {
this->registerChild(std::move(child), SkSL::SampleUsage::Explicit());
}
const char* name() const override { return "SampleCoordEffect"; }
std::unique_ptr<GrFragmentProcessor> clone() const override {
SkASSERT(false);
return nullptr;
}
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {
}
bool onIsEqual(const GrFragmentProcessor&) const override {
SkASSERT(false);
return true;
}
private:
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
using INHERITED = GrFragmentProcessor;
};
class GLSLSampleCoordEffect : public GrGLSLFragmentProcessor {
void emitCode(EmitArgs& args) override {
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
SkString sample1 = this->invokeChild(0, args, "float2(sk_FragCoord.x, sk_FragCoord.y)");
SkString sample2 = this->invokeChild(0, args, "float2(sk_FragCoord.x, 512-sk_FragCoord.y)");
fragBuilder->codeAppendf("return (%s + %s) / 2;\n", sample1.c_str(), sample2.c_str());
}
};
GrGLSLFragmentProcessor* SampleCoordEffect::onCreateGLSLInstance() const {
return new GLSLSampleCoordEffect();
}
DEF_SIMPLE_GPU_GM_BG(fpcoordinateoverride, ctx, rtCtx, canvas, 512, 512,
ToolUtils::color_to_565(0xFF66AA99)) {
SkRect bounds = SkRect::MakeIWH(512, 512);
SkBitmap bmp;
GetResourceAsBitmap("images/mandrill_512_q075.jpg", &bmp);
GrBitmapTextureMaker maker(ctx, bmp, GrImageTexGenPolicy::kDraw);
auto view = maker.view(GrMipmapped::kNo);
if (!view) {
return;
}
std::unique_ptr<GrFragmentProcessor> imgFP =
GrTextureEffect::Make(std::move(view), bmp.alphaType(), SkMatrix());
auto fp = std::unique_ptr<GrFragmentProcessor>(new SampleCoordEffect(std::move(imgFP)));
GrPaint grPaint;
grPaint.setCoverageFragmentProcessor(std::move(fp));
rtCtx->addDrawOp(GrFillRectOp::MakeNonAARect(ctx, std::move(grPaint), SkMatrix::I(), bounds));
}