1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/basictypes.h" 6 #include "base/memory/shared_memory.h" 7 #include "skia/ext/platform_canvas.h" 8 #include "testing/gtest/include/gtest/gtest.h" 9 #include "ui/gfx/blit.h" 10 #include "ui/gfx/point.h" 11 #include "ui/gfx/rect.h" 12 13 namespace { 14 15 // Fills the given canvas with the values by duplicating the values into each 16 // color channel for the corresponding pixel. 17 // 18 // Example values = {{0x0, 0x01}, {0x12, 0xFF}} would give a canvas with: 19 // 0x00000000 0x01010101 20 // 0x12121212 0xFFFFFFFF 21 template<int w, int h> 22 void SetToCanvas(skia::PlatformCanvas* canvas, uint8 values[h][w]) { 23 SkBitmap& bitmap = const_cast<SkBitmap&>( 24 skia::GetTopDevice(*canvas)->accessBitmap(true)); 25 SkAutoLockPixels lock(bitmap); 26 ASSERT_EQ(w, bitmap.width()); 27 ASSERT_EQ(h, bitmap.height()); 28 29 for (int y = 0; y < h; y++) { 30 for (int x = 0; x < w; x++) { 31 uint8 value = values[y][x]; 32 *bitmap.getAddr32(x, y) = 33 (value << 24) | (value << 16) | (value << 8) | value; 34 } 35 } 36 } 37 38 // Checks each pixel in the given canvas and see if it is made up of the given 39 // values, where each value has been duplicated into each channel of the given 40 // bitmap (see SetToCanvas above). 41 template<int w, int h> 42 void VerifyCanvasValues(skia::PlatformCanvas* canvas, uint8 values[h][w]) { 43 SkBitmap& bitmap = const_cast<SkBitmap&>( 44 skia::GetTopDevice(*canvas)->accessBitmap(true)); 45 SkAutoLockPixels lock(bitmap); 46 ASSERT_EQ(w, bitmap.width()); 47 ASSERT_EQ(h, bitmap.height()); 48 49 for (int y = 0; y < h; y++) { 50 for (int x = 0; x < w; x++) { 51 uint8 value = values[y][x]; 52 uint32 expected = 53 (value << 24) | (value << 16) | (value << 8) | value; 54 ASSERT_EQ(expected, *bitmap.getAddr32(x, y)); 55 } 56 } 57 } 58 59 } // namespace 60 61 TEST(Blit, ScrollCanvas) { 62 static const int kCanvasWidth = 5; 63 static const int kCanvasHeight = 5; 64 skia::RefPtr<SkCanvas> canvas = skia::AdoptRef( 65 skia::CreatePlatformCanvas(kCanvasWidth, kCanvasHeight, true)); 66 uint8 initial_values[kCanvasHeight][kCanvasWidth] = { 67 { 0x00, 0x01, 0x02, 0x03, 0x04 }, 68 { 0x10, 0x11, 0x12, 0x13, 0x14 }, 69 { 0x20, 0x21, 0x22, 0x23, 0x24 }, 70 { 0x30, 0x31, 0x32, 0x33, 0x34 }, 71 { 0x40, 0x41, 0x42, 0x43, 0x44 }}; 72 SetToCanvas<5, 5>(canvas.get(), initial_values); 73 74 // Sanity check on input. 75 VerifyCanvasValues<5, 5>(canvas.get(), initial_values); 76 77 // Scroll none and make sure it's a NOP. 78 gfx::ScrollCanvas(canvas.get(), 79 gfx::Rect(0, 0, kCanvasWidth, kCanvasHeight), 80 gfx::Vector2d(0, 0)); 81 VerifyCanvasValues<5, 5>(canvas.get(), initial_values); 82 83 // Scroll with a empty clip and make sure it's a NOP. 84 gfx::Rect empty_clip(1, 1, 0, 0); 85 gfx::ScrollCanvas(canvas.get(), empty_clip, gfx::Vector2d(0, 1)); 86 VerifyCanvasValues<5, 5>(canvas.get(), initial_values); 87 88 // Scroll the center 3 pixels up one. 89 gfx::Rect center_three(1, 1, 3, 3); 90 gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(0, -1)); 91 uint8 scroll_up_expected[kCanvasHeight][kCanvasWidth] = { 92 { 0x00, 0x01, 0x02, 0x03, 0x04 }, 93 { 0x10, 0x21, 0x22, 0x23, 0x14 }, 94 { 0x20, 0x31, 0x32, 0x33, 0x24 }, 95 { 0x30, 0x31, 0x32, 0x33, 0x34 }, 96 { 0x40, 0x41, 0x42, 0x43, 0x44 }}; 97 VerifyCanvasValues<5, 5>(canvas.get(), scroll_up_expected); 98 99 // Reset and scroll the center 3 pixels down one. 100 SetToCanvas<5, 5>(canvas.get(), initial_values); 101 gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(0, 1)); 102 uint8 scroll_down_expected[kCanvasHeight][kCanvasWidth] = { 103 { 0x00, 0x01, 0x02, 0x03, 0x04 }, 104 { 0x10, 0x11, 0x12, 0x13, 0x14 }, 105 { 0x20, 0x11, 0x12, 0x13, 0x24 }, 106 { 0x30, 0x21, 0x22, 0x23, 0x34 }, 107 { 0x40, 0x41, 0x42, 0x43, 0x44 }}; 108 VerifyCanvasValues<5, 5>(canvas.get(), scroll_down_expected); 109 110 // Reset and scroll the center 3 pixels right one. 111 SetToCanvas<5, 5>(canvas.get(), initial_values); 112 gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(1, 0)); 113 uint8 scroll_right_expected[kCanvasHeight][kCanvasWidth] = { 114 { 0x00, 0x01, 0x02, 0x03, 0x04 }, 115 { 0x10, 0x11, 0x11, 0x12, 0x14 }, 116 { 0x20, 0x21, 0x21, 0x22, 0x24 }, 117 { 0x30, 0x31, 0x31, 0x32, 0x34 }, 118 { 0x40, 0x41, 0x42, 0x43, 0x44 }}; 119 VerifyCanvasValues<5, 5>(canvas.get(), scroll_right_expected); 120 121 // Reset and scroll the center 3 pixels left one. 122 SetToCanvas<5, 5>(canvas.get(), initial_values); 123 gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(-1, 0)); 124 uint8 scroll_left_expected[kCanvasHeight][kCanvasWidth] = { 125 { 0x00, 0x01, 0x02, 0x03, 0x04 }, 126 { 0x10, 0x12, 0x13, 0x13, 0x14 }, 127 { 0x20, 0x22, 0x23, 0x23, 0x24 }, 128 { 0x30, 0x32, 0x33, 0x33, 0x34 }, 129 { 0x40, 0x41, 0x42, 0x43, 0x44 }}; 130 VerifyCanvasValues<5, 5>(canvas.get(), scroll_left_expected); 131 132 // Diagonal scroll. 133 SetToCanvas<5, 5>(canvas.get(), initial_values); 134 gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(2, 2)); 135 uint8 scroll_diagonal_expected[kCanvasHeight][kCanvasWidth] = { 136 { 0x00, 0x01, 0x02, 0x03, 0x04 }, 137 { 0x10, 0x11, 0x12, 0x13, 0x14 }, 138 { 0x20, 0x21, 0x22, 0x23, 0x24 }, 139 { 0x30, 0x31, 0x32, 0x11, 0x34 }, 140 { 0x40, 0x41, 0x42, 0x43, 0x44 }}; 141 VerifyCanvasValues<5, 5>(canvas.get(), scroll_diagonal_expected); 142 } 143 144 #if defined(OS_WIN) 145 146 TEST(Blit, WithSharedMemory) { 147 const int kCanvasWidth = 5; 148 const int kCanvasHeight = 5; 149 base::SharedMemory shared_mem; 150 ASSERT_TRUE(shared_mem.CreateAnonymous(kCanvasWidth * kCanvasHeight)); 151 base::SharedMemoryHandle section = shared_mem.handle(); 152 skia::RefPtr<SkCanvas> canvas = skia::AdoptRef( 153 skia::CreatePlatformCanvas(kCanvasWidth, kCanvasHeight, true, section, 154 skia::RETURN_NULL_ON_FAILURE)); 155 ASSERT_TRUE(canvas); 156 shared_mem.Close(); 157 158 uint8 initial_values[kCanvasHeight][kCanvasWidth] = { 159 { 0x00, 0x01, 0x02, 0x03, 0x04 }, 160 { 0x10, 0x11, 0x12, 0x13, 0x14 }, 161 { 0x20, 0x21, 0x22, 0x23, 0x24 }, 162 { 0x30, 0x31, 0x32, 0x33, 0x34 }, 163 { 0x40, 0x41, 0x42, 0x43, 0x44 }}; 164 SetToCanvas<5, 5>(canvas.get(), initial_values); 165 166 // Sanity check on input. 167 VerifyCanvasValues<5, 5>(canvas.get(), initial_values); 168 } 169 170 #endif 171 172
