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skia_utils_mac_unittest.mm
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skia_utils_mac_unittest.mm
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// Copyright (c) 2012 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.h"
#import <AppKit/AppKit.h>
#include "base/mac/foundation_util.h"
#include "base/mac/scoped_nsobject.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.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 image.
NSImage* CreateNSImage(int width, int height);
// Checks that the given bitmap rep is actually red or blue.
void TestImageRep(NSBitmapImageRep* imageRep, bool isred);
// Checks that the given bitmap is red.
void TestSkBitmap(const SkBitmap& bitmap);
// 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) {
SkColorType ct = tfbit ? kN32_SkColorType : kARGB_4444_SkColorType;
SkImageInfo info = SkImageInfo::Make(width, height, ct, kPremul_SkAlphaType);
SkBitmap bitmap;
bitmap.allocPixels(info);
if (isred)
bitmap.eraseARGB(0xff, 0xff, 0, 0);
else
bitmap.eraseARGB(0xff, 0, 0, 0xff);
return bitmap;
}
NSImage* SkiaUtilsMacTest::CreateNSImage(int width, int height) {
base::scoped_nsobject<NSBitmapImageRep> bitmap([[NSBitmapImageRep alloc]
initWithBitmapDataPlanes:nil
pixelsWide:width
pixelsHigh:height
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSCalibratedRGBColorSpace
bitmapFormat:0
bytesPerRow:4 * width
bitsPerPixel:32]);
{
gfx::ScopedNSGraphicsContextSaveGState scopedGState;
[NSGraphicsContext
setCurrentContext:[NSGraphicsContext
graphicsContextWithBitmapImageRep:bitmap]];
CGFloat comps[] = {1.0, 0.0, 0.0, 1.0};
NSColor* color =
[NSColor colorWithColorSpace:[NSColorSpace genericRGBColorSpace]
components:comps
count:4];
[color set];
NSRectFill(NSMakeRect(0, 0, width, height));
}
base::scoped_nsobject<NSImage> image(
[[NSImage alloc] initWithSize:NSMakeSize(width, height)]);
[image addRepresentation:bitmap];
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) {
int x = bitmap.width() > 17 ? 17 : 0;
int y = bitmap.height() > 17 ? 17 : 0;
SkColor color = bitmap.getColor(x, y);
EXPECT_EQ(255u, SkColorGetR(color));
EXPECT_EQ(0u, SkColorGetB(color));
EXPECT_EQ(0u, SkColorGetG(color));
EXPECT_EQ(255u, SkColorGetA(color));
}
void SkiaUtilsMacTest::ShapeHelper(int width, int height,
bool isred, bool tfbit) {
SkBitmap thing(CreateSkBitmap(width, height, isred, tfbit));
// Confirm size
NSImage* image = skia::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(base::mac::ObjCCastStrict<NSBitmapImageRep>(
[[image representations] lastObject]),
isred);
}
TEST_F(SkiaUtilsMacTest, BitmapToNSImage_RedSquare64x64) {
ShapeHelper(64, 64, true, true);
}
TEST_F(SkiaUtilsMacTest, BitmapToNSImage_BlueRectangle199x19) {
ShapeHelper(199, 19, false, true);
}
TEST_F(SkiaUtilsMacTest, BitmapToNSImage_BlueRectangle444) {
ShapeHelper(200, 200, false, false);
}
TEST_F(SkiaUtilsMacTest, BitmapToNSBitmapImageRep_BlueRectangle20x30) {
int width = 20;
int height = 30;
SkBitmap bitmap(CreateSkBitmap(width, height, false, true));
NSBitmapImageRep* imageRep = skia::SkBitmapToNSBitmapImageRep(bitmap);
EXPECT_DOUBLE_EQ(width, [imageRep size].width);
EXPECT_DOUBLE_EQ(height, [imageRep size].height);
TestImageRep(imageRep, false);
}
TEST_F(SkiaUtilsMacTest, NSImageRepToSkBitmap) {
int width = 10;
int height = 15;
NSImage* image = CreateNSImage(width, height);
EXPECT_EQ(1u, [[image representations] count]);
NSBitmapImageRep* imageRep = base::mac::ObjCCastStrict<NSBitmapImageRep>(
[[image representations] lastObject]);
NSColorSpace* colorSpace = [NSColorSpace genericRGBColorSpace];
SkBitmap bitmap(skia::NSImageRepToSkBitmapWithColorSpace(
imageRep, [image size], false, [colorSpace CGColorSpace]));
TestSkBitmap(bitmap);
}
} // namespace