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| 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 "SkColorCubeFilter.h" |
| 10 #include "SkBitmapSource.h" |
| 11 #include "SkData.h" |
| 12 #include "SkGradientShader.h" |
| 13 |
| 14 namespace skiagm { |
| 15 |
| 16 static SkShader* MakeLinear() { |
| 17 static const SkPoint pts[2] = { |
| 18 { 0, 0 }, |
| 19 { SkIntToScalar(80), SkIntToScalar(80) } |
| 20 }; |
| 21 static const SkColor colors[] = { SK_ColorYELLOW, SK_ColorBLUE }; |
| 22 return SkGradientShader::CreateLinear( |
| 23 pts, colors, NULL, 2, SkShader::kRepeat_TileMode, 0, &SkMatrix::I()); |
| 24 } |
| 25 |
| 26 class ColorCubeGM : public GM { |
| 27 public: |
| 28 ColorCubeGM() |
| 29 : fInitialized(false) |
| 30 , f3DLut4(NULL) |
| 31 , f3DLut8(NULL) |
| 32 , f3DLut16(NULL) |
| 33 , f3DLut32(NULL) |
| 34 , f3DLut64(NULL) |
| 35 { |
| 36 this->setBGColor(0xFF000000); |
| 37 } |
| 38 |
| 39 ~ColorCubeGM() { |
| 40 SkSafeUnref(f3DLut4); |
| 41 SkSafeUnref(f3DLut8); |
| 42 SkSafeUnref(f3DLut16); |
| 43 SkSafeUnref(f3DLut32); |
| 44 SkSafeUnref(f3DLut64); |
| 45 } |
| 46 |
| 47 protected: |
| 48 virtual SkString onShortName() { |
| 49 return SkString("colorcube"); |
| 50 } |
| 51 |
| 52 void make_3Dluts() { |
| 53 make_3Dlut(&f3DLut4, 4, true, false, false); |
| 54 make_3Dlut(&f3DLut8, 8, false, true, false); |
| 55 make_3Dlut(&f3DLut16, 16, false, true, true); |
| 56 make_3Dlut(&f3DLut32, 32, true, true, false); |
| 57 make_3Dlut(&f3DLut64, 64, true, false, true); |
| 58 } |
| 59 |
| 60 void make_bitmap() { |
| 61 fBitmap.allocN32Pixels(80, 80); |
| 62 SkCanvas canvas(fBitmap); |
| 63 canvas.clear(0x00000000); |
| 64 SkPaint paint; |
| 65 paint.setAntiAlias(true); |
| 66 SkShader* shader = MakeLinear(); |
| 67 paint.setShader(shader); |
| 68 SkRect r = { 0, 0, SkIntToScalar(80), SkIntToScalar(80) }; |
| 69 canvas.drawRect(r, paint); |
| 70 shader->unref(); |
| 71 } |
| 72 |
| 73 void make_3Dlut(SkData** data, int size, bool invR, bool invG, bool invB) { |
| 74 *data = SkData::NewUninitialized(sizeof(SkColor) * size * size * size); |
| 75 SkColor* pixels = (SkColor*)((*data)->writable_data()); |
| 76 SkAutoMalloc lutMemory(size); |
| 77 SkAutoMalloc invLutMemory(size); |
| 78 uint8_t* lut = (uint8_t*)lutMemory.get(); |
| 79 uint8_t* invLut = (uint8_t*)invLutMemory.get(); |
| 80 const int maxIndex = size - 1; |
| 81 for (int i = 0; i < size; i++) { |
| 82 lut[i] = (i * 255) / maxIndex; |
| 83 invLut[i] = ((maxIndex - i) * 255) / maxIndex; |
| 84 } |
| 85 for (int r = 0; r < size; ++r) { |
| 86 for (int g = 0; g < size; ++g) { |
| 87 for (int b = 0; b < size; ++b) { |
| 88 pixels[(size * ((size * b) + g)) + r] = SkColorSetARGB(0xFF, |
| 89 invR ? invLut[r] : lut[r], |
| 90 invG ? invLut[g] : lut[g], |
| 91 invB ? invLut[b] : lut[b]); |
| 92 } |
| 93 } |
| 94 } |
| 95 } |
| 96 |
| 97 virtual SkISize onISize() { |
| 98 return SkISize::Make(500, 100); |
| 99 } |
| 100 |
| 101 virtual void onDraw(SkCanvas* canvas) { |
| 102 if (!fInitialized) { |
| 103 this->make_bitmap(); |
| 104 this->make_3Dluts(); |
| 105 fInitialized = true; |
| 106 } |
| 107 canvas->clear(0x00000000); |
| 108 SkPaint paint; |
| 109 paint.setColorFilter(SkColorCubeFilter::Create(f3DLut4, 4))->unref(); |
| 110 canvas->drawBitmap(fBitmap, 10, 10, &paint); |
| 111 |
| 112 paint.setColorFilter(SkColorCubeFilter::Create(f3DLut8, 8))->unref(); |
| 113 canvas->drawBitmap(fBitmap, 110, 10, &paint); |
| 114 |
| 115 paint.setColorFilter(SkColorCubeFilter::Create(f3DLut16, 16))->unref(); |
| 116 canvas->drawBitmap(fBitmap, 210, 10, &paint); |
| 117 |
| 118 paint.setColorFilter(SkColorCubeFilter::Create(f3DLut32, 32))->unref(); |
| 119 canvas->drawBitmap(fBitmap, 310, 10, &paint); |
| 120 |
| 121 paint.setColorFilter(SkColorCubeFilter::Create(f3DLut64, 64))->unref(); |
| 122 canvas->drawBitmap(fBitmap, 410, 10, &paint); |
| 123 } |
| 124 |
| 125 private: |
| 126 typedef GM INHERITED; |
| 127 bool fInitialized; |
| 128 SkBitmap fBitmap; |
| 129 SkData* f3DLut4; |
| 130 SkData* f3DLut8; |
| 131 SkData* f3DLut16; |
| 132 SkData* f3DLut32; |
| 133 SkData* f3DLut64; |
| 134 }; |
| 135 |
| 136 ////////////////////////////////////////////////////////////////////////////// |
| 137 |
| 138 static GM* MyFactory(void*) { return new ColorCubeGM; } |
| 139 static GMRegistry reg(MyFactory); |
| 140 |
| 141 } |
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