#include "config.h"
#include "Image.h"
#include "AffineTransform.h"
#include "BitmapImage.h"
#include "GraphicsContext.h"
#include "ImageObserver.h"
#include "Length.h"
#include "MIMETypeRegistry.h"
#include "SharedBuffer.h"
#include <math.h>
#include <wtf/MainThread.h>
#include <wtf/StdLibExtras.h>
#if USE(CG)
#include <CoreFoundation/CoreFoundation.h>
#endif
namespace WebCore {
Image::Image(ImageObserver* observer)
: m_imageObserver(observer)
{
}
Image::~Image()
{
}
Image* Image::nullImage()
{
ASSERT(isMainThread());
static Image* nullImage = BitmapImage::create().leakRef();
return nullImage;
}
bool Image::supportsType(const String& type)
{
return MIMETypeRegistry::isSupportedImageResourceMIMEType(type);
}
bool Image::setData(PassRefPtr<SharedBuffer> data, bool allDataReceived)
{
m_encodedImageData = data;
if (!m_encodedImageData.get())
return true;
int length = m_encodedImageData->size();
if (!length)
return true;
return dataChanged(allDataReceived);
}
void Image::fillWithSolidColor(GraphicsContext* ctxt, const FloatRect& dstRect, const Color& color, ColorSpace styleColorSpace, CompositeOperator op)
{
if (!color.alpha())
return;
CompositeOperator previousOperator = ctxt->compositeOperation();
ctxt->setCompositeOperation(!color.hasAlpha() && op == CompositeSourceOver ? CompositeCopy : op);
ctxt->fillRect(dstRect, color, styleColorSpace);
ctxt->setCompositeOperation(previousOperator);
}
void Image::draw(GraphicsContext* ctx, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator op, BlendMode blendMode, ImageOrientationDescription description)
{
draw(ctx, dstRect, srcRect, styleColorSpace, op, blendMode, description);
}
void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const FloatPoint& srcPoint, const FloatSize& scaledTileSize, ColorSpace styleColorSpace, CompositeOperator op, BlendMode blendMode)
{
if (mayFillWithSolidColor()) {
fillWithSolidColor(ctxt, destRect, solidColor(), styleColorSpace, op);
return;
}
ASSERT(!isBitmapImage() || notSolidColor());
#if PLATFORM(IOS)
FloatSize intrinsicTileSize = originalSize();
#else
FloatSize intrinsicTileSize = size();
#endif
if (hasRelativeWidth())
intrinsicTileSize.setWidth(scaledTileSize.width());
if (hasRelativeHeight())
intrinsicTileSize.setHeight(scaledTileSize.height());
FloatSize scale(scaledTileSize.width() / intrinsicTileSize.width(),
scaledTileSize.height() / intrinsicTileSize.height());
FloatRect oneTileRect;
FloatSize actualTileSize(scaledTileSize.width() + spaceSize().width(), scaledTileSize.height() + spaceSize().height());
oneTileRect.setX(destRect.x() + fmodf(fmodf(-srcPoint.x(), actualTileSize.width()) - actualTileSize.width(), actualTileSize.width()));
oneTileRect.setY(destRect.y() + fmodf(fmodf(-srcPoint.y(), actualTileSize.height()) - actualTileSize.height(), actualTileSize.height()));
oneTileRect.setSize(scaledTileSize);
if (oneTileRect.contains(destRect) && !ctxt->drawLuminanceMask()) {
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, styleColorSpace, op, blendMode, ImageOrientationDescription());
return;
}
#if PLATFORM(IOS)
if (ctxt->isAcceleratedContext()) {
if (size().width() == 1 && intersection(oneTileRect, destRect).height() == destRect.height()) {
FloatRect visibleSrcRect;
visibleSrcRect.setX(0);
visibleSrcRect.setY((destRect.y() - oneTileRect.y()) / scale.height());
visibleSrcRect.setWidth(1);
visibleSrcRect.setHeight(destRect.height() / scale.height());
draw(ctxt, destRect, visibleSrcRect, styleColorSpace, op, BlendModeNormal, ImageOrientationDescription());
return;
}
if (size().height() == 1 && intersection(oneTileRect, destRect).width() == destRect.width()) {
FloatRect visibleSrcRect;
visibleSrcRect.setX((destRect.x() - oneTileRect.x()) / scale.width());
visibleSrcRect.setY(0);
visibleSrcRect.setWidth(destRect.width() / scale.width());
visibleSrcRect.setHeight(1);
draw(ctxt, destRect, visibleSrcRect, styleColorSpace, op, BlendModeNormal, ImageOrientationDescription());
return;
}
}
#endif
#if PLATFORM(IOS)
const float maxPatternTilePixels = 512 * 512;
#else
const float maxPatternTilePixels = 2048 * 2048;
#endif
FloatRect transformedTileSize = ctxt->getCTM().mapRect(FloatRect(FloatPoint(), scaledTileSize));
float transformedTileSizePixels = transformedTileSize.width() * transformedTileSize.height();
FloatRect currentTileRect = oneTileRect;
if (transformedTileSizePixels > maxPatternTilePixels) {
GraphicsContextStateSaver stateSaver(*ctxt);
ctxt->clip(destRect);
currentTileRect.shiftYEdgeTo(destRect.y());
float toY = currentTileRect.y();
while (toY < destRect.maxY()) {
currentTileRect.shiftXEdgeTo(destRect.x());
float toX = currentTileRect.x();
while (toX < destRect.maxX()) {
FloatRect toRect(toX, toY, currentTileRect.width(), currentTileRect.height());
FloatRect fromRect(toFloatPoint(currentTileRect.location() - oneTileRect.location()), currentTileRect.size());
fromRect.scale(1 / scale.width(), 1 / scale.height());
draw(ctxt, toRect, fromRect, styleColorSpace, op, BlendModeNormal, ImageOrientationDescription());
toX += currentTileRect.width();
currentTileRect.shiftXEdgeTo(oneTileRect.x());
}
toY += currentTileRect.height();
currentTileRect.shiftYEdgeTo(oneTileRect.y());
}
return;
}
AffineTransform patternTransform = AffineTransform().scaleNonUniform(scale.width(), scale.height());
FloatRect tileRect(FloatPoint(), intrinsicTileSize);
drawPattern(ctxt, tileRect, patternTransform, oneTileRect.location(), styleColorSpace, op, destRect, blendMode);
#if PLATFORM(IOS)
startAnimation(DoNotCatchUp);
#else
startAnimation();
#endif
}
void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& dstRect, const FloatRect& srcRect,
const FloatSize& tileScaleFactor, TileRule hRule, TileRule vRule, ColorSpace styleColorSpace, CompositeOperator op)
{
if (mayFillWithSolidColor()) {
fillWithSolidColor(ctxt, dstRect, solidColor(), styleColorSpace, op);
return;
}
if (hRule == RoundTile || hRule == SpaceTile)
hRule = RepeatTile;
if (vRule == RoundTile || vRule == SpaceTile)
vRule = RepeatTile;
AffineTransform patternTransform = AffineTransform().scaleNonUniform(tileScaleFactor.width(), tileScaleFactor.height());
float hPhase = tileScaleFactor.width() * srcRect.x();
float vPhase = tileScaleFactor.height() * srcRect.y();
float scaledTileWidth = tileScaleFactor.width() * srcRect.width();
float scaledTileHeight = tileScaleFactor.height() * srcRect.height();
if (hRule == Image::RepeatTile)
hPhase -= (dstRect.width() - scaledTileWidth) / 2;
if (vRule == Image::RepeatTile)
vPhase -= (dstRect.height() - scaledTileHeight) / 2;
FloatPoint patternPhase(dstRect.x() - hPhase, dstRect.y() - vPhase);
drawPattern(ctxt, srcRect, patternTransform, patternPhase, styleColorSpace, op, dstRect);
#if PLATFORM(IOS)
startAnimation(DoNotCatchUp);
#else
startAnimation();
#endif
}
#if ENABLE(IMAGE_DECODER_DOWN_SAMPLING)
FloatRect Image::adjustSourceRectForDownSampling(const FloatRect& srcRect, const IntSize& scaledSize) const
{
const FloatSize unscaledSize = size();
if (unscaledSize == scaledSize)
return srcRect;
float xscale = static_cast<float>(scaledSize.width()) / unscaledSize.width();
float yscale = static_cast<float>(scaledSize.height()) / unscaledSize.height();
FloatRect scaledSrcRect = srcRect;
scaledSrcRect.scale(xscale, yscale);
return scaledSrcRect;
}
#endif
void Image::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
{
#if PLATFORM(IOS)
intrinsicRatio = originalSize();
#else
intrinsicRatio = size();
#endif
intrinsicWidth = Length(intrinsicRatio.width(), Fixed);
intrinsicHeight = Length(intrinsicRatio.height(), Fixed);
}
}