1/* 2 * Copyright 2014 Google Inc. 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.h" 9#include "SkCanvas.h" 10#include "SkColorFilter.h" 11#include "SkGradientShader.h" 12 13static SkShader* make_shader(const SkRect& bounds) { 14 const SkPoint pts[] = { 15 { bounds.left(), bounds.top() }, 16 { bounds.right(), bounds.bottom() }, 17 }; 18 const SkColor colors[] = { 19 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorBLACK, 20 SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW, 21 }; 22 return SkGradientShader::CreateLinear(pts, 23 colors, NULL, SK_ARRAY_COUNT(colors), 24 SkShader::kClamp_TileMode); 25} 26 27typedef void (*InstallPaint)(SkPaint*, uint32_t, uint32_t); 28 29static void install_nothing(SkPaint* paint, uint32_t, uint32_t) { 30 paint->setColorFilter(NULL); 31} 32 33static void install_lighting(SkPaint* paint, uint32_t mul, uint32_t add) { 34 paint->setColorFilter(SkColorFilter::CreateLightingFilter(mul, add))->unref(); 35} 36 37class ColorFiltersGM : public skiagm::GM { 38public: 39 ColorFiltersGM() { 40 fName.set("lightingcolorfilter"); 41 } 42 43protected: 44 virtual SkString onShortName() { 45 return fName; 46 } 47 48 virtual SkISize onISize() { 49 return SkISize::Make(640, 480); 50 } 51 52 virtual uint32_t onGetFlags() const SK_OVERRIDE { 53 return kSkipTiled_Flag; 54 } 55 56 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 57 SkPaint paint; 58 SkRect r; 59 r.setWH(600, 50); 60 paint.setShader(make_shader(r))->unref(); 61 62 const struct { 63 InstallPaint fProc; 64 uint32_t fData0, fData1; 65 } rec[] = { 66 { install_nothing, 0, 0 }, 67 { install_lighting, 0xFF0000, 0 }, 68 { install_lighting, 0x00FF00, 0 }, 69 { install_lighting, 0x0000FF, 0 }, 70 { install_lighting, 0x000000, 0xFF0000 }, 71 { install_lighting, 0x000000, 0x00FF00 }, 72 { install_lighting, 0x000000, 0x0000FF }, 73 }; 74 75 canvas->translate(10, 10); 76 for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) { 77 rec[i].fProc(&paint, rec[i].fData0, rec[i].fData1); 78 canvas->drawRect(r, paint); 79 canvas->translate(0, r.height() + 10); 80 } 81 } 82 83private: 84 SkString fName; 85 typedef GM INHERITED; 86}; 87 88 89////////////////////////////////////////////////////////////////////////////// 90 91DEF_GM( return SkNEW(ColorFiltersGM); ) 92