| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkCanvas.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkGradientShader.h" |
| |
| static sk_sp<SkShader> make_shader(const SkRect& bounds) { |
| const SkPoint pts[] = { |
| { bounds.left(), bounds.top() }, |
| { bounds.right(), bounds.bottom() }, |
| }; |
| const SkColor colors[] = { |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorBLACK, |
| SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW, |
| }; |
| return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors), |
| SkShader::kClamp_TileMode); |
| } |
| |
| typedef void (*InstallPaint)(SkPaint*, uint32_t, uint32_t); |
| |
| static void install_nothing(SkPaint* paint, uint32_t, uint32_t) { |
| paint->setColorFilter(nullptr); |
| } |
| |
| static void install_lighting(SkPaint* paint, uint32_t mul, uint32_t add) { |
| paint->setColorFilter(SkColorMatrixFilter::MakeLightingFilter(mul, add)); |
| } |
| |
| class ColorFiltersGM : public skiagm::GM { |
| public: |
| ColorFiltersGM() { |
| fName.set("lightingcolorfilter"); |
| } |
| |
| protected: |
| virtual SkString onShortName() override { |
| return fName; |
| } |
| |
| virtual SkISize onISize() override { |
| return SkISize::Make(620, 430); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkPaint paint; |
| SkRect r; |
| r.setWH(600, 50); |
| paint.setShader(make_shader(r)); |
| |
| const struct { |
| InstallPaint fProc; |
| uint32_t fData0, fData1; |
| } rec[] = { |
| { install_nothing, 0, 0 }, |
| { install_lighting, 0xFF0000, 0 }, |
| { install_lighting, 0x00FF00, 0 }, |
| { install_lighting, 0x0000FF, 0 }, |
| { install_lighting, 0x000000, 0xFF0000 }, |
| { install_lighting, 0x000000, 0x00FF00 }, |
| { install_lighting, 0x000000, 0x0000FF }, |
| }; |
| |
| canvas->translate(10, 10); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) { |
| rec[i].fProc(&paint, rec[i].fData0, rec[i].fData1); |
| canvas->drawRect(r, paint); |
| canvas->translate(0, r.height() + 10); |
| } |
| } |
| |
| private: |
| SkString fName; |
| typedef GM INHERITED; |
| }; |
| |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new ColorFiltersGM;) |