/*
* Copyright (C) 2005, 2006, 2007, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "config.h"
#import "WKGraphics.h"
#if PLATFORM(IOS)
#import "CoreGraphicsSPI.h"
#import "FontCascade.h"
#import "PlatformScreen.h"
#import "WebCoreThread.h"
#import <ImageIO/ImageIO.h>
#import <wtf/StdLibExtras.h>
using namespace WebCore;
static inline void _FillRectsUsingOperation(CGContextRef context, const CGRect* rects, int count, CGCompositeOperation op)
{
int i;
CGRect *integralRects = reinterpret_cast<CGRect *>(alloca(sizeof(CGRect) * count));
assert (integralRects);
for (i = 0; i < count; i++) {
integralRects[i] = CGRectApplyAffineTransform (rects[i], CGContextGetCTM(context));
integralRects[i] = CGRectIntegral (integralRects[i]);
integralRects[i] = CGRectApplyAffineTransform (integralRects[i], CGAffineTransformInvert(CGContextGetCTM(context)));
}
CGCompositeOperation oldOp = CGContextGetCompositeOperation(context);
CGContextSetCompositeOperation(context, op);
CGContextFillRects(context, integralRects, count);
CGContextSetCompositeOperation(context, oldOp);
}
static inline void _FillRectUsingOperation(CGContextRef context, CGRect rect, CGCompositeOperation op)
{
if (rect.size.width > 0 && rect.size.height > 0) {
_FillRectsUsingOperation (context, &rect, 1, op);
}
}
void WKRectFill(CGContextRef context, CGRect aRect)
{
if (aRect.size.width > 0 && aRect.size.height > 0) {
CGContextSaveGState(context);
_FillRectUsingOperation(context, aRect, kCGCompositeCopy);
CGContextRestoreGState(context);
}
}
void WKRectFillUsingOperation(CGContextRef context, CGRect aRect, WKCompositeOperation compositeOperation)
{
COMPILE_ASSERT(sizeof(WKCompositeOperation) == sizeof(CGCompositeOperation), "WKCompositeOperation must be the same size as CGCompositeOperation.");
if (aRect.size.width > 0 && aRect.size.height > 0.0) {
CGContextSaveGState(context);
_FillRectUsingOperation(context, aRect, static_cast<CGCompositeOperation>(compositeOperation));
CGContextRestoreGState(context);
}
}
void WKSetCurrentGraphicsContext(CGContextRef context)
{
WebThreadContext* threadContext = WebThreadCurrentContext();
threadContext->currentCGContext = context;
}
CGContextRef WKGetCurrentGraphicsContext(void)
{
WebThreadContext* threadContext = WebThreadCurrentContext();
return threadContext->currentCGContext;
}
static NSString *imageResourcePath(const char* imageFile, unsigned scaleFactor)
{
NSString *fileName = scaleFactor == 1 ? [NSString stringWithUTF8String:imageFile] : [NSString stringWithFormat:@"%s@%dx", imageFile, scaleFactor];
#if PLATFORM(IOS_SIMULATOR)
NSBundle *bundle = [NSBundle bundleWithIdentifier:@"com.apple.WebCore"];
return [bundle pathForResource:fileName ofType:@"png"];
#else
// Workaround for <rdar://problem/7780665> CFBundleCopyResourceURL takes a long time on iPhone 3G.
NSString *imageDirectory = @"/System/Library/PrivateFrameworks/WebCore.framework";
return [NSString stringWithFormat:@"%@/%@.png", imageDirectory, fileName];
#endif
}
CGImageRef WKGraphicsCreateImageFromBundleWithName(const char *image_file)
{
if (!image_file)
return NULL;
CGImageRef image = nullptr;
NSData *imageData = nullptr;
for (unsigned scaleFactor = screenScaleFactor(); scaleFactor > 0; --scaleFactor) {
imageData = [NSData dataWithContentsOfFile:imageResourcePath(image_file, scaleFactor)];
ASSERT(scaleFactor != screenScaleFactor() || imageData);
if (imageData)
break;
}
if (imageData) {
RetainPtr<CGDataProviderRef> dataProvider = adoptCF(CGDataProviderCreateWithCFData(reinterpret_cast<CFDataRef>(imageData)));
image = CGImageCreateWithPNGDataProvider(dataProvider.get(), nullptr, NO, kCGRenderingIntentDefault);
}
return image;
}
static void WKDrawPatternBitmap(void *info, CGContextRef c)
{
CGImageRef image = (CGImageRef)info;
CGFloat scale = screenScaleFactor();
CGContextDrawImage(c, CGRectMake(0, 0, CGImageGetWidth(image) / scale, CGImageGetHeight(image) / scale), image);
}
static void WKReleasePatternBitmap(void *info)
{
CGImageRelease(reinterpret_cast<CGImageRef>(info));
}
static const CGPatternCallbacks WKPatternBitmapCallbacks =
{
0, WKDrawPatternBitmap, WKReleasePatternBitmap
};
CGPatternRef WKCreatePatternFromCGImage(CGImageRef imageRef)
{
// retain image since it's freed by our callback
CGImageRetain(imageRef);
CGFloat scale = screenScaleFactor();
return CGPatternCreate((void*)imageRef, CGRectMake(0, 0, CGImageGetWidth(imageRef) / scale, CGImageGetHeight(imageRef) / scale), CGAffineTransformIdentity, CGImageGetWidth(imageRef) / scale, CGImageGetHeight(imageRef) / scale, kCGPatternTilingConstantSpacing, 1 /*isColored*/, &WKPatternBitmapCallbacks);
}
void WKSetPattern(CGContextRef context, CGPatternRef pattern, bool fill, bool stroke)
{
if (pattern == NULL)
return;
CGFloat patternAlpha = 1;
CGColorSpaceRef colorspace = CGColorSpaceCreatePattern(NULL);
if (fill) {
CGContextSetFillColorSpace(context, colorspace);
CGContextSetFillPattern(context, pattern, &patternAlpha);
}
if (stroke) {
CGContextSetStrokeColorSpace(context, colorspace);
CGContextSetStrokePattern(context, pattern, &patternAlpha);
}
CGColorSpaceRelease(colorspace);
}
#endif // PLATFORM(IOS)