GraphicsContextMac.mm [plain text]
/*
* Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc. All rights reserved.
*
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* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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#import "config.h"
#import "GraphicsContext.h"
#import "WKGraphics.h"
#import "WebCoreSystemInterface.h"
// FIXME: More of this should use CoreGraphics instead of AppKit.
// FIXME: More of this should move into GraphicsContextCG.cpp.
namespace WebCore {
// NSColor, NSBezierPath, and NSGraphicsContext
// calls in this file are all exception-safe, so we don't block
// exceptions for those.
class GraphicsContextPlatformPrivate {
public:
GraphicsContextPlatformPrivate(CGContextRef);
~GraphicsContextPlatformPrivate();
CGContextRef m_cgContext;
IntRect m_focusRingClip; // Work around CG bug in focus ring clipping.
};
GraphicsContextPlatformPrivate::GraphicsContextPlatformPrivate(CGContextRef cgContext)
{
m_cgContext = cgContext;
CGContextRetain(m_cgContext);
}
GraphicsContextPlatformPrivate::~GraphicsContextPlatformPrivate()
{
CGContextRelease(m_cgContext);
}
GraphicsContext::GraphicsContext(CGContextRef cgContext)
: m_common(createGraphicsContextPrivate())
, m_data(new GraphicsContextPlatformPrivate(cgContext))
{
setPaintingDisabled(!cgContext);
CGContextSetShouldAntialias(m_data->m_cgContext, true);
CGContextSetShouldAntialiasFonts(m_data->m_cgContext, true);
}
GraphicsContext::~GraphicsContext()
{
destroyGraphicsContextPrivate(m_common);
delete m_data;
}
void GraphicsContext::setFocusRingClip(const IntRect& r)
{
// This method only exists to work around bugs in Mac focus ring clipping.
m_data->m_focusRingClip = r;
}
void GraphicsContext::clearFocusRingClip()
{
// This method only exists to work around bugs in Mac focus ring clipping.
m_data->m_focusRingClip = IntRect();
}
void GraphicsContext::drawFocusRing(const Color& color)
{
}
CGContextRef GraphicsContext::platformContext() const
{
ASSERT(!paintingDisabled());
ASSERT(m_data->m_cgContext);
return m_data->m_cgContext;
}
void GraphicsContext::setCompositeOperation(CompositeOperator op)
{
}
void GraphicsContext::drawLineForMisspelling(const IntPoint& point, int width)
{
if (paintingDisabled())
return;
// Constants for pattern color
static CGPatternRef spellingPattern = NULL;
static bool usingDot = false;
int patternHeight = cMisspellingLineThickness;
int patternWidth = cMisspellingLinePatternWidth;
if (!spellingPattern) {
CGImageRef image = WKGraphicsCreateImageFromBundleWithName("SpellingDot");
assert(image); // if image is not available, we want to know
spellingPattern = WKCreatePatternFromCGImage(image);
CGImageRelease(image);
usingDot = true;
}
// Make sure to draw only complete dots.
// NOTE: Code here used to shift the underline to the left and increase the width
// to make sure everything gets underlined, but that results in drawing out of
// bounds (e.g. when at the edge of a view) and could make it appear that the
// space between adjacent misspelled words was underlined.
if (usingDot) {
// allow slightly more considering that the pattern ends with a transparent pixel
int widthMod = width % patternWidth;
if (patternWidth - widthMod > cMisspellingLinePatternGapWidth)
width -= widthMod;
}
// Draw underline
CGContextRef context = WKGetCurrentGraphicsContext();
CGContextSaveGState(context);
WKSetPattern(context, spellingPattern, YES, YES);
wkSetPatternPhaseInUserSpace(context, point);
WKRectFillUsingOperation(context, CGRectMake(point.x(), point.y(), width, patternHeight), kCGCompositeDover);
CGContextRestoreGState(context);
}
void GraphicsContext::setPenFromCGColor (CGColorRef color) {
float r, g, b, a;
GSColorGetRGBAComponents(color, &r, &g, &b, &a);
setPen(makeRGBA((int)(r * 255), (int)(g * 255), (int)(b * 255), (int)(a * 255)));
}
}