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/*
* Copyright (C) 2006, 2008 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 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
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* 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.
*/
#include "config.h"
#include "CanvasPattern.h"
#include "CachedImage.h"
#include "ExceptionCode.h"
#include "FloatRect.h"
#include "GraphicsContext.h"
#include "Image.h"
namespace WebCore {
void CanvasPattern::parseRepetitionType(const String& type, bool& repeatX, bool& repeatY, ExceptionCode& ec)
{
if (type.isEmpty() || type == "repeat") {
repeatX = true;
repeatY = true;
ec = 0;
return;
}
if (type == "no-repeat") {
repeatX = false;
repeatY = false;
ec = 0;
return;
}
if (type == "repeat-x") {
repeatX = true;
repeatY = false;
ec = 0;
return;
}
if (type == "repeat-y") {
repeatX = false;
repeatY = true;
ec = 0;
return;
}
ec = SYNTAX_ERR;
}
#if PLATFORM(CG)
CanvasPattern::CanvasPattern(CGImageRef image, bool repeatX, bool repeatY, bool originClean)
: m_platformImage(image)
, m_cachedImage(0)
, m_repeatX(repeatX)
, m_repeatY(repeatY)
, m_originClean(originClean)
{
}
#elif PLATFORM(CAIRO)
CanvasPattern::CanvasPattern(cairo_surface_t* surface, bool repeatX, bool repeatY, bool originClean)
: m_platformImage(cairo_surface_reference(surface))
, m_cachedImage(0)
, m_repeatX(repeatX)
, m_repeatY(repeatY)
, m_originClean(originClean)
{
}
#endif
CanvasPattern::CanvasPattern(CachedImage* cachedImage, bool repeatX, bool repeatY, bool originClean)
: m_cachedImage(cachedImage)
#if PLATFORM(CAIRO)
, m_platformImage(0)
#endif
, m_repeatX(repeatX)
, m_repeatY(repeatY)
, m_originClean(originClean)
{
if (cachedImage)
cachedImage->addClient(this);
}
CanvasPattern::~CanvasPattern()
{
#if PLATFORM(CAIRO)
if (m_platformImage)
cairo_surface_destroy(m_platformImage);
#endif
if (m_cachedImage)
m_cachedImage->removeClient(this);
}
#if PLATFORM(CG)
static void patternCallback(void* info, CGContextRef context)
{
CGImageRef platformImage = static_cast<CanvasPattern*>(info)->platformImage();
if (platformImage) {
CGRect rect = GraphicsContext(context).roundToDevicePixels(
FloatRect(0, 0, CGImageGetWidth(platformImage), CGImageGetHeight(platformImage)));
CGContextDrawImage(context, rect, platformImage);
return;
}
CachedImage* cachedImage = static_cast<CanvasPattern*>(info)->cachedImage();
if (!cachedImage)
return;
Image* image = cachedImage->image();
if (!image)
return;
FloatRect rect = GraphicsContext(context).roundToDevicePixels(image->rect());
if (image->getCGImageRef()) {
CGContextDrawImage(context, rect, image->getCGImageRef());
// FIXME: We should refactor this code to use the platform-independent
// drawing API in all cases. Then, this didDraw call will happen
// automatically, and we can remove it.
cachedImage->didDraw(image);
return;
}
GraphicsContext(context).drawImage(image, rect);
}
static void patternReleaseCallback(void* info)
{
static_cast<CanvasPattern*>(info)->deref();
}
CGPatternRef CanvasPattern::createPattern(const CGAffineTransform& transform)
{
CGRect rect;
rect.origin.x = 0;
rect.origin.y = 0;
if (m_platformImage) {
rect.size.width = CGImageGetWidth(m_platformImage.get());
rect.size.height = CGImageGetHeight(m_platformImage.get());
} else {
if (!m_cachedImage)
return 0;
Image* image = m_cachedImage->image();
if (!image)
return 0;
rect.size.width = image->width();
rect.size.height = image->height();
}
CGAffineTransform patternTransform =
CGAffineTransformTranslate(CGAffineTransformScale(transform, 1, -1), 0, -rect.size.height);
// If FLT_MAX should also be used for xStep or yStep, nothing is rendered. Using fractions of FLT_MAX also
// result in nothing being rendered.
// INT_MAX is almost correct, but there seems to be some number wrapping occuring making the fill
// pattern is not filled correctly.
// So, just pick a really large number that works.
float xStep = m_repeatX ? rect.size.width : (100000000.0f);
float yStep = m_repeatY ? rect.size.height : (100000000.0f);
const CGPatternCallbacks patternCallbacks = { 0, patternCallback, patternReleaseCallback };
ref();
return CGPatternCreate(this, rect, patternTransform, xStep, yStep,
kCGPatternTilingConstantSpacing, TRUE, &patternCallbacks);
}
#elif PLATFORM(CAIRO)
cairo_pattern_t* CanvasPattern::createPattern(const cairo_matrix_t& m)
{
cairo_surface_t* surface = 0;
if (m_platformImage) {
surface = m_platformImage;
} else {
if (!m_cachedImage)
return 0;
Image* image = m_cachedImage->image();
if (!image)
return 0;
surface = image->nativeImageForCurrentFrame();
}
if (!surface)
return 0;
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
cairo_pattern_set_matrix(pattern, &m);
if (m_repeatX || m_repeatY)
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
return pattern;
}
#endif
}
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