#include "config.h"
#include "Image.h"
#include "AffineTransform.h"
#include "GraphicsContext.h"
#include "IntRect.h"
#include "MIMETypeRegistry.h"
#include <math.h>
#if PLATFORM(CG)
#include <CoreFoundation/CoreFoundation.h>
#endif
namespace WebCore {
Image::Image(ImageObserver* observer)
: m_imageObserver(observer)
{
}
Image::~Image()
{
}
bool Image::supportsType(const String& type)
{
return MIMETypeRegistry::isSupportedImageResourceMIMEType(type);
}
bool Image::isNull() const
{
return size().isEmpty();
}
bool Image::setData(PassRefPtr<SharedBuffer> data, bool allDataReceived)
{
m_data = data;
if (!m_data.get())
return true;
int length = m_data->size();
if (!length)
return true;
#ifdef kImageBytesCutoff
if (length > kImageBytesCutoff) {
length = kImageBytesCutoff;
allDataReceived = false;
}
#endif
return dataChanged(allDataReceived);
}
IntRect Image::rect() const
{
return IntRect(IntPoint(), size());
}
int Image::width() const
{
return size().width();
}
int Image::height() const
{
return size().height();
}
void Image::fillWithSolidColor(GraphicsContext* ctxt, const FloatRect& dstRect, const Color& color, CompositeOperator op)
{
if (color.alpha() <= 0)
return;
ctxt->save();
ctxt->setCompositeOperation(!color.hasAlpha() && op == CompositeSourceOver ? CompositeCopy : op);
ctxt->fillRect(dstRect, color);
ctxt->restore();
}
static inline FloatSize calculatePatternScale(const FloatRect& dstRect, const FloatRect& srcRect, Image::TileRule hRule, Image::TileRule vRule)
{
float scaleX = 1.0f, scaleY = 1.0f;
if (hRule == Image::StretchTile)
scaleX = dstRect.width() / srcRect.width();
if (vRule == Image::StretchTile)
scaleY = dstRect.height() / srcRect.height();
if (hRule == Image::RepeatTile)
scaleX = scaleY;
if (vRule == Image::RepeatTile)
scaleY = scaleX;
return FloatSize(scaleX, scaleY);
}
void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const FloatPoint& srcPoint, const FloatSize& scaledTileSize, CompositeOperator op)
{
if (!nativeImageForCurrentFrame())
return;
if (mayFillWithSolidColor()) {
fillWithSolidColor(ctxt, destRect, solidColor(), op);
return;
}
FloatSize intrinsicTileSize = size();
FloatSize scale(scaledTileSize.width() / intrinsicTileSize.width(),
scaledTileSize.height() / intrinsicTileSize.height());
AffineTransform patternTransform = AffineTransform().scale(scale.width(), scale.height());
FloatRect oneTileRect;
oneTileRect.setX(destRect.x() + fmodf(fmodf(-srcPoint.x(), scaledTileSize.width()) - scaledTileSize.width(), scaledTileSize.width()));
oneTileRect.setY(destRect.y() + fmodf(fmodf(-srcPoint.y(), scaledTileSize.height()) - scaledTileSize.height(), scaledTileSize.height()));
oneTileRect.setSize(scaledTileSize);
if (oneTileRect.contains(destRect)) {
FloatRect visibleSrcRect;
visibleSrcRect.setX((destRect.x() - oneTileRect.x()) / scale.width());
visibleSrcRect.setY((destRect.y() - oneTileRect.y()) / scale.height());
visibleSrcRect.setWidth(destRect.width() / scale.width());
visibleSrcRect.setHeight(destRect.height() / scale.height());
draw(ctxt, destRect, visibleSrcRect, op);
return;
}
FloatRect tileRect(FloatPoint(), intrinsicTileSize);
drawPattern(ctxt, tileRect, patternTransform, oneTileRect.location(), op, destRect);
startAnimation();
}
void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& dstRect, const FloatRect& srcRect, TileRule hRule, TileRule vRule, CompositeOperator op)
{
if (!nativeImageForCurrentFrame())
return;
if (mayFillWithSolidColor()) {
fillWithSolidColor(ctxt, dstRect, solidColor(), op);
return;
}
if (hRule == RoundTile)
hRule = RepeatTile;
if (vRule == RoundTile)
vRule = RepeatTile;
FloatSize scale = calculatePatternScale(dstRect, srcRect, hRule, vRule);
AffineTransform patternTransform = AffineTransform().scale(scale.width(), scale.height());
float hPhase = scale.width() * srcRect.x();
float vPhase = scale.height() * srcRect.y();
if (hRule == Image::RepeatTile)
hPhase -= fmodf(dstRect.width(), scale.width() * srcRect.width()) / 2.0f;
if (vRule == Image::RepeatTile)
vPhase -= fmodf(dstRect.height(), scale.height() * srcRect.height()) / 2.0f;
FloatPoint patternPhase(dstRect.x() - hPhase, dstRect.y() - vPhase);
drawPattern(ctxt, srcRect, patternTransform, patternPhase, op, dstRect);
startAnimation();
}
}