WKGraphics.mm   [plain text]

/*
* Copyright (C) 2005-2018 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_FAMILY)

#import "WebCoreThreadInternal.h"
#import <pal/spi/cg/CoreGraphicsSPI.h>

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);
}

void WKRectFill(CGContextRef context, CGRect aRect)
{
if (aRect.size.width > 0 && aRect.size.height > 0) {
CGContextSaveGState(context);
if (aRect.size.width > 0 && aRect.size.height > 0)
_FillRectsUsingOperation(context, &aRect, 1, kCGCompositeCopy);
CGContextRestoreGState(context);
}
}

void WKSetCurrentGraphicsContext(CGContextRef context)
{
WebThreadContext* threadContext = WebThreadCurrentContext();
threadContext->currentCGContext = context;
}

CGContextRef WKGetCurrentGraphicsContext(void)
{
WebThreadContext* threadContext = WebThreadCurrentContext();
return threadContext->currentCGContext;
}

#endif // PLATFORM(IOS_FAMILY)