vandebo@chromium.org | ece95c3 | 2013-10-24 15:20:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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 "SkBitmap.h" |
| 10 | #include "SkCanvas.h" |
| 11 | #include "SkColorPriv.h" |
| 12 | |
| 13 | /** |
| 14 | * This GM checks that bitmap pixels are unpremultiplied before being exported |
| 15 | * to other formats. If unpremultiplication is implemented properly, this |
| 16 | * GM should come out completely white. If not, this GM looks like a row of two |
| 17 | * greyscale gradients above a row of grey lines. |
| 18 | * This tests both the ARGB4444 and ARGB8888 bitmap configurations. |
| 19 | */ |
| 20 | |
| 21 | static const int SLIDE_SIZE = 256; |
| 22 | static const int PIXEL_SIZE_8888 = SLIDE_SIZE / 256; |
| 23 | static const int PIXEL_SIZE_4444 = SLIDE_SIZE / 16; |
| 24 | |
| 25 | static void init_bitmap(SkBitmap::Config config, SkBitmap* bitmap) { |
reed@google.com | eb9a46c | 2014-01-25 16:46:20 +0000 | [diff] [blame^] | 26 | bitmap->allocConfigPixels(config, SLIDE_SIZE, SLIDE_SIZE); |
vandebo@chromium.org | ece95c3 | 2013-10-24 15:20:00 +0000 | [diff] [blame] | 27 | bitmap->eraseColor(SK_ColorWHITE); |
| 28 | } |
| 29 | |
| 30 | static SkBitmap make_argb8888_gradient() { |
| 31 | SkBitmap bitmap; |
| 32 | init_bitmap(SkBitmap::kARGB_8888_Config, &bitmap); |
| 33 | uint8_t rowColor = 0; |
| 34 | for (int y = 0; y < SLIDE_SIZE; y++) { |
| 35 | uint32_t* dst = bitmap.getAddr32(0, y); |
| 36 | for (int x = 0; x < SLIDE_SIZE; x++) { |
| 37 | dst[x] = SkPackARGB32(rowColor, rowColor, |
| 38 | rowColor, rowColor); |
| 39 | } |
| 40 | if (y % PIXEL_SIZE_8888 == PIXEL_SIZE_8888 - 1) { |
| 41 | rowColor++; |
| 42 | } |
| 43 | } |
| 44 | return bitmap; |
| 45 | } |
| 46 | |
| 47 | static SkBitmap make_argb4444_gradient() { |
| 48 | SkBitmap bitmap; |
| 49 | init_bitmap(SkBitmap::kARGB_4444_Config, &bitmap); |
| 50 | uint8_t rowColor = 0; |
| 51 | for (int y = 0; y < SLIDE_SIZE; y++) { |
| 52 | uint16_t* dst = bitmap.getAddr16(0, y); |
| 53 | for (int x = 0; x < SLIDE_SIZE; x++) { |
| 54 | dst[x] = SkPackARGB4444(rowColor, rowColor, |
| 55 | rowColor, rowColor); |
| 56 | } |
| 57 | if (y % PIXEL_SIZE_4444 == PIXEL_SIZE_4444 - 1) { |
| 58 | rowColor++; |
| 59 | } |
| 60 | } |
| 61 | return bitmap; |
| 62 | } |
| 63 | |
| 64 | static SkBitmap make_argb8888_stripes() { |
| 65 | SkBitmap bitmap; |
| 66 | init_bitmap(SkBitmap::kARGB_8888_Config, &bitmap); |
| 67 | uint8_t rowColor = 0; |
| 68 | for (int y = 0; y < SLIDE_SIZE; y++) { |
| 69 | uint32_t* dst = bitmap.getAddr32(0, y); |
| 70 | for (int x = 0; x < SLIDE_SIZE; x++) { |
| 71 | dst[x] = SkPackARGB32(rowColor, rowColor, |
| 72 | rowColor, rowColor); |
| 73 | } |
| 74 | if (rowColor == 0) { |
| 75 | rowColor = 255; |
| 76 | } else { |
| 77 | rowColor = 0; |
| 78 | } |
| 79 | } |
| 80 | return bitmap; |
| 81 | } |
| 82 | |
| 83 | static SkBitmap make_argb4444_stripes() { |
| 84 | SkBitmap bitmap; |
| 85 | init_bitmap(SkBitmap::kARGB_4444_Config, &bitmap); |
| 86 | uint8_t rowColor = 0;; |
| 87 | for (int y = 0; y < SLIDE_SIZE; y++) { |
| 88 | uint16_t* dst = bitmap.getAddr16(0, y); |
| 89 | for (int x = 0; x < SLIDE_SIZE; x++) { |
| 90 | dst[x] = SkPackARGB4444(rowColor, rowColor, |
| 91 | rowColor, rowColor); |
| 92 | } |
| 93 | if (rowColor == 0) { |
| 94 | rowColor = 15; |
| 95 | } else { |
| 96 | rowColor = 0; |
| 97 | } |
| 98 | } |
| 99 | return bitmap; |
| 100 | } |
| 101 | |
| 102 | namespace skiagm { |
| 103 | |
| 104 | class BitmapPremulGM : public GM { |
| 105 | public: |
| 106 | BitmapPremulGM() { |
| 107 | this->setBGColor(SK_ColorWHITE); |
| 108 | } |
| 109 | |
| 110 | protected: |
| 111 | SkString onShortName() SK_OVERRIDE { |
| 112 | return SkString("bitmap_premul"); |
| 113 | } |
| 114 | |
| 115 | virtual SkISize onISize() SK_OVERRIDE { |
| 116 | return SkISize::Make(SLIDE_SIZE * 2, SLIDE_SIZE * 2); |
| 117 | } |
| 118 | |
| 119 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 120 | SkScalar slideSize = SkIntToScalar(SLIDE_SIZE); |
| 121 | canvas->drawBitmap(make_argb8888_gradient(), 0, 0); |
| 122 | canvas->drawBitmap(make_argb4444_gradient(), slideSize, 0); |
| 123 | canvas->drawBitmap(make_argb8888_stripes(), 0, slideSize); |
| 124 | canvas->drawBitmap(make_argb4444_stripes(), slideSize, slideSize); |
| 125 | } |
| 126 | |
| 127 | private: |
| 128 | typedef GM INHERITED; |
| 129 | }; |
| 130 | |
| 131 | DEF_GM( return new BitmapPremulGM; ) |
| 132 | } |