1 /*
2 * Copyright 2019 Google LLC.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "gm/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkImageInfo.h"
12 #include "include/core/SkMatrix.h"
13 #include "include/core/SkPaint.h"
14 #include "include/core/SkRect.h"
15 #include "include/core/SkShader.h"
16 #include "include/core/SkSize.h"
17 #include "include/core/SkString.h"
18 #include "include/core/SkTileMode.h"
19 #include "include/core/SkTypes.h"
20 #include "src/core/SkCanvasPriv.h"
21 #include "src/gpu/GrCaps.h"
22 #include "src/gpu/GrDirectContextPriv.h"
23 #include "src/gpu/GrFragmentProcessor.h"
24 #include "src/gpu/SkGr.h"
25 #include "src/gpu/SurfaceFillContext.h"
26 #include "src/gpu/effects/GrRRectEffect.h"
27 #include "src/gpu/effects/GrSkSLFP.h"
28 #include "src/gpu/effects/GrTextureEffect.h"
29 #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
30 #include "tools/Resources.h"
31 #include "tools/ToolUtils.h"
32
33 class SampleCoordEffect : public GrFragmentProcessor {
34 public:
35 inline static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 0;
36
SampleCoordEffect(std::unique_ptr<GrFragmentProcessor> child)37 SampleCoordEffect(std::unique_ptr<GrFragmentProcessor> child)
38 : INHERITED(CLASS_ID, kNone_OptimizationFlags) {
39 this->registerChild(std::move(child), SkSL::SampleUsage::Explicit());
40 }
41
name() const42 const char* name() const override { return "SampleCoordEffect"; }
43
clone() const44 std::unique_ptr<GrFragmentProcessor> clone() const override {
45 SkASSERT(false);
46 return nullptr;
47 }
48
onAddToKey(const GrShaderCaps &,GrProcessorKeyBuilder *) const49 void onAddToKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {}
50
onIsEqual(const GrFragmentProcessor &) const51 bool onIsEqual(const GrFragmentProcessor&) const override {
52 SkASSERT(false);
53 return true;
54 }
55
56 private:
57 std::unique_ptr<ProgramImpl> onMakeProgramImpl() const override;
58 using INHERITED = GrFragmentProcessor;
59 };
60
onMakeProgramImpl() const61 std::unique_ptr<GrFragmentProcessor::ProgramImpl> SampleCoordEffect::onMakeProgramImpl() const {
62 class Impl : public ProgramImpl {
63 public:
64 void emitCode(EmitArgs& args) override {
65 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
66 SkString s1 = this->invokeChild(0, args, "float2(sk_FragCoord.x, sk_FragCoord.y)");
67 SkString s2 = this->invokeChild(0, args, "float2(sk_FragCoord.x, 512-sk_FragCoord.y)");
68 fragBuilder->codeAppendf("return (%s + %s) / 2;\n", s1.c_str(), s2.c_str());
69 }
70 };
71
72 return std::make_unique<Impl>();
73 }
74
75 DEF_SIMPLE_GPU_GM_BG(fpcoordinateoverride, rContext, canvas, 512, 512,
76 ToolUtils::color_to_565(0xFF66AA99)) {
77
78 auto sfc = SkCanvasPriv::TopDeviceSurfaceFillContext(canvas);
79 if (!sfc) {
80 return;
81 }
82
83 SkBitmap bmp;
84 GetResourceAsBitmap("images/mandrill_512_q075.jpg", &bmp);
85 auto view = std::get<0>(GrMakeCachedBitmapProxyView(rContext, bmp, GrMipmapped::kNo));
86 if (!view) {
87 return;
88 }
89 std::unique_ptr<GrFragmentProcessor> imgFP =
90 GrTextureEffect::Make(std::move(view), bmp.alphaType(), SkMatrix());
91 auto fp = std::unique_ptr<GrFragmentProcessor>(new SampleCoordEffect(std::move(imgFP)));
92
93 sfc->fillWithFP(std::move(fp));
94 }
95
