| // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/basictypes.h" |
| #include "gfx/blit.h" |
| #include "gfx/point.h" |
| #include "gfx/rect.h" |
| #include "skia/ext/platform_canvas.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace { |
| |
| // Fills the given canvas with the values by duplicating the values into each |
| // color channel for the corresponding pixel. |
| // |
| // Example values = {{0x0, 0x01}, {0x12, 0xFF}} would give a canvas with: |
| // 0x00000000 0x01010101 |
| // 0x12121212 0xFFFFFFFF |
| template<int w, int h> |
| void SetToCanvas(skia::PlatformCanvas* canvas, uint8 values[h][w]) { |
| SkBitmap& bitmap = const_cast<SkBitmap&>( |
| canvas->getTopPlatformDevice().accessBitmap(true)); |
| SkAutoLockPixels lock(bitmap); |
| ASSERT_EQ(w, bitmap.width()); |
| ASSERT_EQ(h, bitmap.height()); |
| |
| for (int y = 0; y < h; y++) { |
| for (int x = 0; x < w; x++) { |
| uint8 value = values[y][x]; |
| *bitmap.getAddr32(x, y) = |
| (value << 24) | (value << 16) | (value << 8) | value; |
| } |
| } |
| } |
| |
| // Checks each pixel in the given canvas and see if it is made up of the given |
| // values, where each value has been duplicated into each channel of the given |
| // bitmap (see SetToCanvas above). |
| template<int w, int h> |
| void VerifyCanvasValues(skia::PlatformCanvas* canvas, uint8 values[h][w]) { |
| SkBitmap& bitmap = const_cast<SkBitmap&>( |
| canvas->getTopPlatformDevice().accessBitmap(true)); |
| SkAutoLockPixels lock(bitmap); |
| ASSERT_EQ(w, bitmap.width()); |
| ASSERT_EQ(h, bitmap.height()); |
| |
| for (int y = 0; y < h; y++) { |
| for (int x = 0; x < w; x++) { |
| uint8 value = values[y][x]; |
| uint32 expected = |
| (value << 24) | (value << 16) | (value << 8) | value; |
| ASSERT_EQ(expected, *bitmap.getAddr32(x, y)); |
| } |
| } |
| } |
| |
| } // namespace |
| |
| TEST(Blit, ScrollCanvas) { |
| static const int kCanvasWidth = 5; |
| static const int kCanvasHeight = 5; |
| skia::PlatformCanvas canvas(kCanvasWidth, kCanvasHeight, true); |
| uint8 initial_values[kCanvasHeight][kCanvasWidth] = { |
| { 0x00, 0x01, 0x02, 0x03, 0x04 }, |
| { 0x10, 0x11, 0x12, 0x13, 0x14 }, |
| { 0x20, 0x21, 0x22, 0x23, 0x24 }, |
| { 0x30, 0x31, 0x32, 0x33, 0x34 }, |
| { 0x40, 0x41, 0x42, 0x43, 0x44 }}; |
| SetToCanvas<5, 5>(&canvas, initial_values); |
| |
| // Sanity check on input. |
| VerifyCanvasValues<5, 5>(&canvas, initial_values); |
| |
| // Scroll none and make sure it's a NOP. |
| gfx::ScrollCanvas(&canvas, |
| gfx::Rect(0, 0, kCanvasWidth, kCanvasHeight), |
| gfx::Point(0, 0)); |
| VerifyCanvasValues<5, 5>(&canvas, initial_values); |
| |
| // Scroll the center 3 pixels up one. |
| gfx::Rect center_three(1, 1, 3, 3); |
| gfx::ScrollCanvas(&canvas, center_three, gfx::Point(0, -1)); |
| uint8 scroll_up_expected[kCanvasHeight][kCanvasWidth] = { |
| { 0x00, 0x01, 0x02, 0x03, 0x04 }, |
| { 0x10, 0x21, 0x22, 0x23, 0x14 }, |
| { 0x20, 0x31, 0x32, 0x33, 0x24 }, |
| { 0x30, 0x31, 0x32, 0x33, 0x34 }, |
| { 0x40, 0x41, 0x42, 0x43, 0x44 }}; |
| VerifyCanvasValues<5, 5>(&canvas, scroll_up_expected); |
| |
| // Reset and scroll the center 3 pixels down one. |
| SetToCanvas<5, 5>(&canvas, initial_values); |
| gfx::ScrollCanvas(&canvas, center_three, gfx::Point(0, 1)); |
| uint8 scroll_down_expected[kCanvasHeight][kCanvasWidth] = { |
| { 0x00, 0x01, 0x02, 0x03, 0x04 }, |
| { 0x10, 0x11, 0x12, 0x13, 0x14 }, |
| { 0x20, 0x11, 0x12, 0x13, 0x24 }, |
| { 0x30, 0x21, 0x22, 0x23, 0x34 }, |
| { 0x40, 0x41, 0x42, 0x43, 0x44 }}; |
| VerifyCanvasValues<5, 5>(&canvas, scroll_down_expected); |
| |
| // Reset and scroll the center 3 pixels right one. |
| SetToCanvas<5, 5>(&canvas, initial_values); |
| gfx::ScrollCanvas(&canvas, center_three, gfx::Point(1, 0)); |
| uint8 scroll_right_expected[kCanvasHeight][kCanvasWidth] = { |
| { 0x00, 0x01, 0x02, 0x03, 0x04 }, |
| { 0x10, 0x11, 0x11, 0x12, 0x14 }, |
| { 0x20, 0x21, 0x21, 0x22, 0x24 }, |
| { 0x30, 0x31, 0x31, 0x32, 0x34 }, |
| { 0x40, 0x41, 0x42, 0x43, 0x44 }}; |
| VerifyCanvasValues<5, 5>(&canvas, scroll_right_expected); |
| |
| // Reset and scroll the center 3 pixels left one. |
| SetToCanvas<5, 5>(&canvas, initial_values); |
| gfx::ScrollCanvas(&canvas, center_three, gfx::Point(-1, 0)); |
| uint8 scroll_left_expected[kCanvasHeight][kCanvasWidth] = { |
| { 0x00, 0x01, 0x02, 0x03, 0x04 }, |
| { 0x10, 0x12, 0x13, 0x13, 0x14 }, |
| { 0x20, 0x22, 0x23, 0x23, 0x24 }, |
| { 0x30, 0x32, 0x33, 0x33, 0x34 }, |
| { 0x40, 0x41, 0x42, 0x43, 0x44 }}; |
| VerifyCanvasValues<5, 5>(&canvas, scroll_left_expected); |
| |
| // Diagonal scroll. |
| SetToCanvas<5, 5>(&canvas, initial_values); |
| gfx::ScrollCanvas(&canvas, center_three, gfx::Point(2, 2)); |
| uint8 scroll_diagonal_expected[kCanvasHeight][kCanvasWidth] = { |
| { 0x00, 0x01, 0x02, 0x03, 0x04 }, |
| { 0x10, 0x11, 0x12, 0x13, 0x14 }, |
| { 0x20, 0x21, 0x22, 0x23, 0x24 }, |
| { 0x30, 0x31, 0x32, 0x11, 0x34 }, |
| { 0x40, 0x41, 0x42, 0x43, 0x44 }}; |
| VerifyCanvasValues<5, 5>(&canvas, scroll_diagonal_expected); |
| } |