5843012837
This allows fragment processors to sample their children with their local coordinate system transformed by a matrix. Change-Id: Ifa848bbd85b939bbc5751fec5cf8f89ee904bf39 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/282590 Reviewed-by: Brian Salomon <bsalomon@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
101 lines
4.0 KiB
C++
101 lines
4.0 KiB
C++
/*
|
|
* 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/gpu/GrBitmapTextureMaker.h"
|
|
#include "src/gpu/GrClip.h"
|
|
#include "src/gpu/GrContextPriv.h"
|
|
#include "src/gpu/GrRenderTargetContextPriv.h"
|
|
#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
|
|
#include "src/gpu/ops/GrFillRectOp.h"
|
|
#include "tools/Resources.h"
|
|
|
|
class SampleMatrixVariableEffect : public GrFragmentProcessor {
|
|
public:
|
|
static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 2;
|
|
|
|
SampleMatrixVariableEffect(std::unique_ptr<GrFragmentProcessor> child)
|
|
: INHERITED(CLASS_ID, kNone_OptimizationFlags) {
|
|
child->setSampleMatrix(SkSL::SampleMatrix(SkSL::SampleMatrix::Kind::kVariable));
|
|
this->registerChildProcessor(std::move(child));
|
|
}
|
|
|
|
const char* name() const override { return "SampleMatrixVariableEffect"; }
|
|
|
|
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:
|
|
GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
|
|
typedef GrFragmentProcessor INHERITED;
|
|
};
|
|
|
|
class GLSLSampleMatrixVariableEffect : public GrGLSLFragmentProcessor {
|
|
void emitCode(EmitArgs& args) override {
|
|
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
|
|
SkString sample1 = this->invokeChildWithMatrix(0, args, "float3x3(1)");
|
|
SkString sample2 = this->invokeChildWithMatrix(0, args, "float3x3(1, -1, 0, 1, 0, 0, "
|
|
"-0.5, 1, 1)");
|
|
fragBuilder->codeAppendf("%s = (%s + %s) / 2;\n", args.fOutputColor, sample1.c_str(),
|
|
sample2.c_str());
|
|
}
|
|
};
|
|
|
|
GrGLSLFragmentProcessor* SampleMatrixVariableEffect::onCreateGLSLInstance() const {
|
|
return new GLSLSampleMatrixVariableEffect();
|
|
}
|
|
|
|
DEF_SIMPLE_GPU_GM(sample_matrix_variable, ctx, rtCtx, canvas, 512, 256) {
|
|
{
|
|
SkRect bounds = SkRect::MakeIWH(256, 256);
|
|
SkBitmap bmp;
|
|
GetResourceAsBitmap("images/mandrill_256.png", &bmp);
|
|
GrBitmapTextureMaker maker(ctx, bmp, GrImageTexGenPolicy::kDraw);
|
|
auto view = maker.view(GrMipMapped::kNo);
|
|
std::unique_ptr<GrFragmentProcessor> imgFP =
|
|
GrTextureEffect::Make(std::move(view), bmp.alphaType(), SkMatrix());
|
|
imgFP->setSampleMatrix(SkSL::SampleMatrix::Kind::kVariable);
|
|
auto fp = std::unique_ptr<GrFragmentProcessor>(
|
|
new SampleMatrixVariableEffect(std::move(imgFP)));
|
|
|
|
GrPaint paint;
|
|
paint.addCoverageFragmentProcessor(std::move(fp));
|
|
rtCtx->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), bounds);
|
|
}
|
|
|
|
{
|
|
GrPaint paint;
|
|
SkRect bounds = SkRect::MakeLTRB(256, 0, 512, 256);
|
|
static constexpr SkColor colors[] = { 0xff00ff00, 0xffff00ff };
|
|
static constexpr SkScalar pos[] = { 0.0f, 1.0f };
|
|
const SkPoint pts[] = {{ 256, 0 }, { 512, 0 }};
|
|
|
|
auto shader = SkGradientShader::MakeLinear(pts, colors, pos,
|
|
SK_ARRAY_COUNT(colors),
|
|
SkTileMode::kRepeat);
|
|
SkMatrix matrix;
|
|
GrColorInfo colorInfo;
|
|
GrFPArgs args(ctx, &matrix, kHigh_SkFilterQuality, &colorInfo);
|
|
std::unique_ptr<GrFragmentProcessor> gradientFP = as_SB(shader)->asFragmentProcessor(args);
|
|
gradientFP->setSampleMatrix(SkSL::SampleMatrix::Kind::kVariable);
|
|
auto fp = std::unique_ptr<GrFragmentProcessor>(
|
|
new SampleMatrixVariableEffect(std::move(gradientFP)));
|
|
paint.addCoverageFragmentProcessor(std::move(fp));
|
|
rtCtx->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), bounds);
|
|
}
|
|
}
|