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- // 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 <stdint.h>
- #include "base/memory/platform_shared_memory_region.h"
- #include "build/build_config.h"
- #include "skia/ext/platform_canvas.h"
- #include "testing/gtest/include/gtest/gtest.h"
- #include "ui/gfx/blit.h"
- #include "ui/gfx/geometry/point.h"
- #include "ui/gfx/geometry/rect.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(SkCanvas* canvas, uint8_t values[h][w]) {
- ASSERT_EQ(w, canvas->imageInfo().width());
- ASSERT_EQ(h, canvas->imageInfo().height());
- // This wouldn't be necessary if we extended the values in the inputs, but
- // the uint8_t values are a little bit easier to read and maintain.
- uint32_t extendedValues[w*h];
- for (int y = 0; y < h; y++) {
- for (int x = 0; x < w; x++) {
- uint8_t value = values[y][x];
- extendedValues[y*w+x] =
- (value << 24) | (value << 16) | (value << 8) | value;
- }
- }
- SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);
- canvas->writePixels(info, extendedValues, w*4, 0, 0);
- }
- // 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(SkCanvas* canvas, uint8_t values[h][w]) {
- SkBitmap bitmap = skia::ReadPixels(canvas);
- 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_t value = values[y][x];
- uint32_t 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;
- std::unique_ptr<SkCanvas> canvas =
- skia::CreatePlatformCanvas(kCanvasWidth, kCanvasHeight, false);
- uint8_t 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.get(), initial_values);
- // Sanity check on input.
- VerifyCanvasValues<5, 5>(canvas.get(), initial_values);
- // Scroll none and make sure it's a NOP.
- gfx::ScrollCanvas(canvas.get(),
- gfx::Rect(0, 0, kCanvasWidth, kCanvasHeight),
- gfx::Vector2d(0, 0));
- VerifyCanvasValues<5, 5>(canvas.get(), initial_values);
- // Scroll with a empty clip and make sure it's a NOP.
- gfx::Rect empty_clip(1, 1, 0, 0);
- gfx::ScrollCanvas(canvas.get(), empty_clip, gfx::Vector2d(0, 1));
- VerifyCanvasValues<5, 5>(canvas.get(), initial_values);
- // Scroll the center 3 pixels up one.
- gfx::Rect center_three(1, 1, 3, 3);
- gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(0, -1));
- uint8_t 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.get(), scroll_up_expected);
- // Reset and scroll the center 3 pixels down one.
- SetToCanvas<5, 5>(canvas.get(), initial_values);
- gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(0, 1));
- uint8_t 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.get(), scroll_down_expected);
- // Reset and scroll the center 3 pixels right one.
- SetToCanvas<5, 5>(canvas.get(), initial_values);
- gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(1, 0));
- uint8_t 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.get(), scroll_right_expected);
- // Reset and scroll the center 3 pixels left one.
- SetToCanvas<5, 5>(canvas.get(), initial_values);
- gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(-1, 0));
- uint8_t 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.get(), scroll_left_expected);
- // Diagonal scroll.
- SetToCanvas<5, 5>(canvas.get(), initial_values);
- gfx::ScrollCanvas(canvas.get(), center_three, gfx::Vector2d(2, 2));
- uint8_t 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.get(), scroll_diagonal_expected);
- }
- #if BUILDFLAG(IS_WIN)
- TEST(Blit, WithSharedMemory) {
- const int kCanvasWidth = 5;
- const int kCanvasHeight = 5;
- base::subtle::PlatformSharedMemoryRegion section =
- base::subtle::PlatformSharedMemoryRegion::CreateWritable(kCanvasWidth *
- kCanvasHeight);
- ASSERT_TRUE(section.IsValid());
- std::unique_ptr<SkCanvas> canvas =
- skia::CreatePlatformCanvasWithSharedSection(
- kCanvasWidth, kCanvasHeight, false, section.GetPlatformHandle(),
- skia::RETURN_NULL_ON_FAILURE);
- ASSERT_TRUE(canvas);
- // Closes a HANDLE associated with |section|, |canvas| must remain valid.
- section = base::subtle::PlatformSharedMemoryRegion();
- uint8_t 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.get(), initial_values);
- // Sanity check on input.
- VerifyCanvasValues<5, 5>(canvas.get(), initial_values);
- }
- #endif
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