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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/shared_memory.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);
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_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;
skia::RefPtr<SkCanvas> canvas = skia::AdoptRef(
skia::CreatePlatformCanvas(kCanvasWidth, kCanvasHeight, true));
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 defined(OS_WIN)
TEST(Blit, WithSharedMemory) {
const int kCanvasWidth = 5;
const int kCanvasHeight = 5;
base::SharedMemory shared_mem;
ASSERT_TRUE(shared_mem.CreateAnonymous(kCanvasWidth * kCanvasHeight));
base::SharedMemoryHandle section = shared_mem.handle();
skia::RefPtr<SkCanvas> canvas = skia::AdoptRef(skia::CreatePlatformCanvas(
kCanvasWidth, kCanvasHeight, true, section.GetHandle(),
skia::RETURN_NULL_ON_FAILURE));
ASSERT_TRUE(canvas);
shared_mem.Close();
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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