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// Copyright (c) 2011 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 "skia/ext/skia_utils_mac.mm"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class SkiaUtilsMacTest : public testing::Test {
public:
// Creates a red or blue bitmap.
SkBitmap CreateSkBitmap(int width, int height, bool isred, bool tfbit);
// Creates a red or blue image.
NSImage* CreateNSImage(int width, int height, bool isred);
// Checks that the given bitmap rep is actually red or blue.
void TestImageRep(NSBitmapImageRep* imageRep, bool isred);
// Checks that the given bitmap is actually red or blue.
void TestSkBitmap(const SkBitmap& bitmap, bool isred);
enum BitLockerTest {
TestIdentity = 0,
TestTranslate = 1,
TestClip = 2,
TestXClip = TestTranslate | TestClip
};
void RunBitLockerTest(BitLockerTest test);
// If not red, is blue.
// If not tfbit (twenty-four-bit), is 444.
void ShapeHelper(int width, int height, bool isred, bool tfbit);
};
SkBitmap SkiaUtilsMacTest::CreateSkBitmap(int width, int height,
bool isred, bool tfbit) {
SkBitmap bitmap;
if (tfbit)
bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
else
bitmap.setConfig(SkBitmap::kARGB_4444_Config, width, height);
bitmap.allocPixels();
if (isred)
bitmap.eraseRGB(0xff, 0, 0);
else
bitmap.eraseRGB(0, 0, 0xff);
return bitmap;
}
NSImage* SkiaUtilsMacTest::CreateNSImage(int width, int height, bool isred) {
scoped_nsobject<NSImage> image(
[[NSImage alloc] initWithSize:NSMakeSize(width, height)]);
[image lockFocus];
if (isred)
[[NSColor colorWithDeviceRed:1.0 green:0.0 blue:0.0 alpha:1.0] set];
else
[[NSColor colorWithDeviceRed:0.0 green:0.0 blue:1.0 alpha:1.0] set];
NSRectFill(NSMakeRect(0, 0, width, height));
[image unlockFocus];
return [image.release() autorelease];
}
void SkiaUtilsMacTest::TestImageRep(NSBitmapImageRep* imageRep, bool isred) {
// Get the color of a pixel and make sure it looks fine
int x = [imageRep size].width > 17 ? 17 : 0;
int y = [imageRep size].height > 17 ? 17 : 0;
NSColor* color = [imageRep colorAtX:x y:y];
CGFloat red = 0, green = 0, blue = 0, alpha = 0;
// SkBitmapToNSImage returns a bitmap in the calibrated color space (sRGB),
// while NSReadPixel returns a color in the device color space. Convert back
// to the calibrated color space before testing.
color = [color colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
[color getRed:&red green:&green blue:&blue alpha:&alpha];
// Be tolerant of floating point rounding and lossy color space conversions.
if (isred) {
EXPECT_GT(red, 0.95);
EXPECT_LT(blue, 0.05);
} else {
EXPECT_LT(red, 0.05);
EXPECT_GT(blue, 0.95);
}
EXPECT_LT(green, 0.05);
EXPECT_GT(alpha, 0.95);
}
void SkiaUtilsMacTest::TestSkBitmap(const SkBitmap& bitmap, bool isred) {
int x = bitmap.width() > 17 ? 17 : 0;
int y = bitmap.height() > 17 ? 17 : 0;
SkColor color = bitmap.getColor(x, y);
// Be tolerant of lossy color space conversions.
// TODO(sail): Fix color space conversion issues, http://crbug.com/79946
if (isred) {
EXPECT_GT(SkColorGetR(color), 245u);
EXPECT_LT(SkColorGetB(color), 10u);
} else {
EXPECT_LT(SkColorGetR(color), 10u);
EXPECT_GT(SkColorGetB(color), 245u);
}
EXPECT_LT(SkColorGetG(color), 10u);
EXPECT_GT(SkColorGetA(color), 245u);
}
void SkiaUtilsMacTest::RunBitLockerTest(BitLockerTest test) {
const unsigned width = 2;
const unsigned height = 2;
const unsigned storageSize = width * height;
const unsigned original[] = {0xFF333333, 0xFF666666, 0xFF999999, 0xFFCCCCCC};
EXPECT_EQ(storageSize, sizeof(original) / sizeof(original[0]));
unsigned bits[storageSize];
memcpy(bits, original, sizeof(original));
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
bitmap.setPixels(bits);
SkCanvas canvas;
canvas.setBitmapDevice(bitmap);
if (test & TestTranslate)
canvas.translate(width / 2, 0);
if (test & TestClip) {
SkRect clipRect = {0, height / 2, width, height};
canvas.clipRect(clipRect);
}
gfx::SkiaBitLocker bitLocker(&canvas);
CGContextRef cgContext = bitLocker.cgContext();
CGColorRef testColor = CGColorGetConstantColor(kCGColorWhite);
CGContextSetFillColorWithColor(cgContext, testColor);
CGRect cgRect = {{0, 0}, {width, height}};
CGContextFillRect(cgContext, cgRect);
const unsigned results[][storageSize] = {
{0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}, // identity
{0xFF333333, 0xFFFFFFFF, 0xFF999999, 0xFFFFFFFF}, // translate
{0xFF333333, 0xFF666666, 0xFFFFFFFF, 0xFFFFFFFF}, // clip
{0xFF333333, 0xFF666666, 0xFF999999, 0xFFFFFFFF} // translate | clip
};
for (unsigned index = 0; index < storageSize; index++)
EXPECT_EQ(results[test][index], bits[index]);
}
void SkiaUtilsMacTest::ShapeHelper(int width, int height,
bool isred, bool tfbit) {
SkBitmap thing(CreateSkBitmap(width, height, isred, tfbit));
// Confirm size
NSImage* image = gfx::SkBitmapToNSImage(thing);
EXPECT_DOUBLE_EQ([image size].width, (double)width);
EXPECT_DOUBLE_EQ([image size].height, (double)height);
EXPECT_TRUE([[image representations] count] == 1);
EXPECT_TRUE([[[image representations] lastObject]
isKindOfClass:[NSBitmapImageRep class]]);
TestImageRep([[image representations] lastObject], isred);
}
TEST_F(SkiaUtilsMacTest, FAILS_BitmapToNSImage_RedSquare64x64) {
ShapeHelper(64, 64, true, true);
}
TEST_F(SkiaUtilsMacTest, BitmapToNSImage_BlueRectangle199x19) {
ShapeHelper(199, 19, false, true);
}
TEST_F(SkiaUtilsMacTest, FAILS_BitmapToNSImage_BlueRectangle444) {
ShapeHelper(200, 200, false, false);
}
TEST_F(SkiaUtilsMacTest, FAILS_MultipleBitmapsToNSImage) {
int redWidth = 10;
int redHeight = 15;
int blueWidth = 20;
int blueHeight = 30;
SkBitmap redBitmap(CreateSkBitmap(redWidth, redHeight, true, true));
SkBitmap blueBitmap(CreateSkBitmap(blueWidth, blueHeight, false, true));
std::vector<const SkBitmap*> bitmaps;
bitmaps.push_back(&redBitmap);
bitmaps.push_back(&blueBitmap);
NSImage* image = gfx::SkBitmapsToNSImage(bitmaps);
// Image size should be the same as the smallest bitmap.
EXPECT_DOUBLE_EQ(redWidth, [image size].width);
EXPECT_DOUBLE_EQ(redHeight, [image size].height);
EXPECT_EQ(2u, [[image representations] count]);
for (NSBitmapImageRep* imageRep in [image representations]) {
bool isred = [imageRep size].width == redWidth;
if (isred) {
EXPECT_DOUBLE_EQ(redHeight, [imageRep size].height);
} else {
EXPECT_DOUBLE_EQ(blueWidth, [imageRep size].width);
EXPECT_DOUBLE_EQ(blueHeight, [imageRep size].height);
}
TestImageRep(imageRep, isred);
}
}
TEST_F(SkiaUtilsMacTest, NSImageRepToSkBitmap) {
int width = 10;
int height = 15;
bool isred = true;
NSImage* image = CreateNSImage(width, height, isred);
EXPECT_EQ(1u, [[image representations] count]);
NSBitmapImageRep* imageRep = [[image representations] lastObject];
SkBitmap bitmap(gfx::NSImageRepToSkBitmap(imageRep, [image size], false));
TestSkBitmap(bitmap, isred);
}
TEST_F(SkiaUtilsMacTest, BitLocker_Identity) {
RunBitLockerTest(SkiaUtilsMacTest::TestIdentity);
}
TEST_F(SkiaUtilsMacTest, BitLocker_Translate) {
RunBitLockerTest(SkiaUtilsMacTest::TestTranslate);
}
TEST_F(SkiaUtilsMacTest, BitLocker_Clip) {
RunBitLockerTest(SkiaUtilsMacTest::TestClip);
}
TEST_F(SkiaUtilsMacTest, BitLocker_XClip) {
RunBitLockerTest(SkiaUtilsMacTest::TestXClip);
}
} // namespace
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