void CanvasRenderingContext2D::fill()
{
GraphicsContext* c = drawingContext();
if (!c)
return;
// FIXME: Do this through platform-independent GraphicsContext API.
#if PLATFORM(CG)
CGContextBeginPath(c->platformContext());
CGContextAddPath(c->platformContext(), state().m_path.platformPath());
if (!state().m_path.isEmpty())
willDraw(CGContextGetPathBoundingBox(c->platformContext()));
if (state().m_fillStyle->gradient()) {
// Shading works on the entire clip region, so convert the current path to a clip.
c->save();
CGContextClip(c->platformContext());
CGContextDrawShading(c->platformContext(), state().m_fillStyle->gradient()->platformShading());
c->restore();
} else {
if (state().m_fillStyle->pattern())
applyFillPattern();
CGContextFillPath(c->platformContext());
}
#elif PLATFORM(QT)
QPainterPath* path = state().m_path.platformPath();
QPainter* p = static_cast<QPainter*>(c->platformContext());
willDraw(path->controlPointRect());
if (state().m_fillStyle->gradient()) {
p->fillPath(*path, QBrush(*(state().m_fillStyle->gradient()->platformShading())));
} else {
if (state().m_fillStyle->pattern())
applyFillPattern();
p->fillPath(*path, p->brush());
}
#endif
clearPathForDashboardBackwardCompatibilityMode();
}
void CanvasRenderingContext2D::applyStrokePattern()
{
GraphicsContext* c = drawingContext();
if (!c)
return;
#if PLATFORM(CG)
// Check for case where the pattern is already set.
CGAffineTransform m = CGContextGetCTM(c->platformContext());
if (state().m_appliedStrokePattern
&& CGAffineTransformEqualToTransform(m, state().m_strokeStylePatternTransform))
return;
CanvasPattern* pattern = state().m_strokeStyle->pattern();
if (!pattern)
return;
CGPatternRef platformPattern = pattern->createPattern(m);
if (!platformPattern)
return;
CGColorSpaceRef patternSpace = CGColorSpaceCreatePattern(0);
CGContextSetStrokeColorSpace(c->platformContext(), patternSpace);
CGColorSpaceRelease(patternSpace);
const CGFloat patternAlpha = 1;
CGContextSetStrokePattern(c->platformContext(), platformPattern, &patternAlpha);
CGPatternRelease(platformPattern);
state().m_strokeStylePatternTransform = m;
#elif PLATFORM(QT)
fprintf(stderr, "FIXME: CanvasRenderingContext2D::applyStrokePattern\n");
#elif PLATFORM(CAIRO)
notImplemented();
#endif
state().m_appliedStrokePattern = true;
}
// FIXME: Why isn't this just another overload of drawImage? Why have a different name?
void CanvasRenderingContext2D::drawImageFromRect(HTMLImageElement* image,
float sx, float sy, float sw, float sh,
float dx, float dy, float dw, float dh,
const String& compositeOperation)
{
if (!image)
return;
CachedImage* cachedImage = image->cachedImage();
if (!cachedImage)
return;
GraphicsContext* c = drawingContext();
if (!c)
return;
CompositeOperator op;
if (!parseCompositeOperator(compositeOperation, op))
op = CompositeSourceOver;
FloatRect destRect = FloatRect(dx, dy, dw, dh);
willDraw(destRect);
c->drawImage(cachedImage->image(), destRect, FloatRect(sx, sy, sw, sh), op);
}
void CanvasRenderingContext2D::applyShadow()
{
GraphicsContext* c = drawingContext();
if (!c)
return;
// FIXME: Do this through platform-independent GraphicsContext API.
#if PLATFORM(CG)
RGBA32 rgba = 0; // default is transparent black
if (!state().m_shadowColor.isEmpty())
CSSParser::parseColor(rgba, state().m_shadowColor);
const CGFloat components[4] = {
((rgba >> 16) & 0xFF) / 255.0f,
((rgba >> 8) & 0xFF) / 255.0f,
(rgba & 0xFF) / 255.0f,
((rgba >> 24) & 0xFF) / 255.0f
};
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGColorRef color = CGColorCreate(colorSpace, components);
CGColorSpaceRelease(colorSpace);
CGContextSetShadowWithColor(c->platformContext(), adjustedShadowSize(state().m_shadowOffset.width(), -state().m_shadowOffset.height()), state().m_shadowBlur, color);
CGColorRelease(color);
#endif
}
void CanvasRenderingContext2D::strokeRect(float x, float y, float width, float height, float lineWidth)
{
if (!validateRectForCanvas(x, y, width, height))
return;
if (!(lineWidth >= 0))
return;
GraphicsContext* c = drawingContext();
if (!c)
return;
FloatRect rect(x, y, width, height);
FloatRect boundingRect = rect;
boundingRect.inflate(lineWidth / 2);
willDraw(boundingRect);
// FIXME: No support for gradients!
if (state().m_strokeStyle->pattern())
applyStrokePattern();
c->strokeRect(rect, lineWidth);
}
void CanvasRenderingContext2D::setFillStyle(PassRefPtr<CanvasStyle> style)
{
if (!style)
return;
if (m_canvas->originClean()) {
if (CanvasPattern* pattern = style->pattern()) {
if (!pattern->originClean())
m_canvas->setOriginTainted();
}
}
state().m_fillStyle = style;
GraphicsContext* c = drawingContext();
if (!c)
return;
#if PLATFORM(CAIRO)
// FIXME: hack to reduce code duplication in CanvasStyle.cpp
state().m_fillStyle->applyStrokeColor(c);
#else
state().m_fillStyle->applyFillColor(c);
#endif
state().m_appliedFillPattern = false;
}
void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, const FloatRect& srcRect,
const FloatRect& dstRect, ExceptionCode& ec)
{
ASSERT(canvas);
ec = 0;
FloatRect srcCanvasRect = FloatRect(FloatPoint(), canvas->size());
if (!(srcCanvasRect.contains(srcRect) && srcRect.width() >= 0 && srcRect.height() >= 0
&& dstRect.width() >= 0 && dstRect.height() >= 0)) {
ec = INDEX_SIZE_ERR;
return;
}
if (srcRect.isEmpty() || dstRect.isEmpty())
return;
GraphicsContext* c = drawingContext();
if (!c)
return;
FloatRect sourceRect = c->roundToDevicePixels(srcRect);
FloatRect destRect = c->roundToDevicePixels(dstRect);
// FIXME: Do this through platform-independent GraphicsContext API.
ImageBuffer* buffer = canvas->buffer();
if (!buffer)
return;
if (!canvas->originClean())
m_canvas->setOriginTainted();
c->drawImage(buffer->image(), destRect, sourceRect);
willDraw(destRect); // This call comes after drawImage, since the buffer we draw into may be our own, and we need to make sure it is dirty.
// FIXME: Arguably willDraw should become didDraw and occur after drawing calls and not before them to avoid problems like this.
}
void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, const FloatRect& srcRect,
const FloatRect& dstRect, ExceptionCode& ec)
{
ASSERT(canvas);
ec = 0;
FloatRect srcCanvasRect = FloatRect(FloatPoint(), canvas->size());
if (!(srcCanvasRect.contains(srcRect) && srcRect.width() >= 0 && srcRect.height() >= 0
&& dstRect.width() >= 0 && dstRect.height() >= 0)) {
ec = INDEX_SIZE_ERR;
return;
}
if (srcRect.isEmpty() || dstRect.isEmpty())
return;
GraphicsContext* c = drawingContext();
if (!c)
return;
FloatRect sourceRect = c->roundToDevicePixels(srcRect);
FloatRect destRect = c->roundToDevicePixels(dstRect);
// FIXME: Do this through platform-independent GraphicsContext API.
#if PLATFORM(CG)
CGImageRef platformImage = canvas->createPlatformImage();
if (!platformImage)
return;
willDraw(destRect);
float iw = CGImageGetWidth(platformImage);
float ih = CGImageGetHeight(platformImage);
if (sourceRect.x() == 0 && sourceRect.y() == 0 && iw == sourceRect.width() && ih == sourceRect.height()) {
// Fast path, yay!
CGContextDrawImage(c->platformContext(), destRect, platformImage);
} else {
// Slow path, boo!
// Create a new bitmap of the appropriate size and then draw that into our context.
size_t csw = static_cast<size_t>(ceilf(sourceRect.width()));
size_t csh = static_cast<size_t>(ceilf(sourceRect.height()));
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
size_t bytesPerRow = csw * 4;
void* buffer = fastMalloc(csh * bytesPerRow);
CGContextRef clippedSourceContext = CGBitmapContextCreate(buffer, csw, csh,
8, bytesPerRow, colorSpace, kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(colorSpace);
CGContextTranslateCTM(clippedSourceContext, -sourceRect.x(), -sourceRect.y());
CGContextDrawImage(clippedSourceContext, CGRectMake(0, 0, iw, ih), platformImage);
CGImageRef clippedSourceImage = CGBitmapContextCreateImage(clippedSourceContext);
CGContextRelease(clippedSourceContext);
CGContextDrawImage(c->platformContext(), destRect, clippedSourceImage);
CGImageRelease(clippedSourceImage);
fastFree(buffer);
}
CGImageRelease(platformImage);
#elif PLATFORM(QT)
QPixmap px = canvas->createPlatformImage();
if (px.isNull())
return;
willDraw(dstRect);
QPainter* painter = static_cast<QPainter*>(c->platformContext());
painter->drawPixmap(dstRect, px, srcRect);
#endif
}
void CanvasRenderingContext2D::stroke()
{
GraphicsContext* c = drawingContext();
if (!c)
return;
// FIXME: Do this through platform-independent GraphicsContext API.
#if PLATFORM(CG)
CGContextBeginPath(c->platformContext());
CGContextAddPath(c->platformContext(), state().m_path.platformPath());
if (!state().m_path.isEmpty()) {
float lineWidth = state().m_lineWidth;
float inset = -lineWidth / 2;
CGRect boundingRect = CGRectInset(CGContextGetPathBoundingBox(c->platformContext()), inset, inset);
willDraw(boundingRect);
}
if (state().m_strokeStyle->gradient()) {
// Shading works on the entire clip region, so convert the current path to a clip.
c->save();
CGContextReplacePathWithStrokedPath(c->platformContext());
CGContextClip(c->platformContext());
CGContextDrawShading(c->platformContext(), state().m_strokeStyle->gradient()->platformShading());
c->restore();
} else {
if (state().m_strokeStyle->pattern())
applyStrokePattern();
CGContextStrokePath(c->platformContext());
}
#elif PLATFORM(QT)
QPainterPath* path = state().m_path.platformPath();
QPainter* p = static_cast<QPainter*>(c->platformContext());
willDraw(path->controlPointRect());
if (state().m_strokeStyle->gradient()) {
p->save();
p->setBrush(*(state().m_strokeStyle->gradient()->platformShading()));
p->strokePath(*path, p->pen());
p->restore();
} else {
if (state().m_strokeStyle->pattern())
applyStrokePattern();
p->strokePath(*path, p->pen());
}
#elif PLATFORM(CAIRO)
cairo_t* pathCr = state().m_path.platformPath()->m_cr;
cairo_t* cr = c->platformContext();
cairo_save(cr);
// FIXME: consider inset, as in CG
willDraw(state().m_path.boundingRect());
if (state().m_strokeStyle->gradient()) {
cairo_set_source(cr, state().m_strokeStyle->gradient()->platformShading());
c->addPath(state().m_path);
cairo_stroke(cr);
} else {
if (state().m_strokeStyle->pattern())
applyStrokePattern();
c->addPath(state().m_path);
cairo_stroke(cr);
}
cairo_restore(cr);
#endif
clearPathForDashboardBackwardCompatibilityMode();
}
void CanvasRenderingContext2D::stroke()
{
GraphicsContext* c = drawingContext();
if (!c)
return;
c->beginPath();
c->addPath(m_path);
if (!m_path.isEmpty()) {
// FIXME: This is insufficient, need to use CGContextReplacePathWithStrokedPath to expand to required bounds
float lineWidth = state().m_lineWidth;
float inset = lineWidth / 2;
FloatRect boundingRect = m_path.boundingRect();
boundingRect.inflate(inset);
willDraw(boundingRect);
}
// FIXME: Do this through platform-independent GraphicsContext API.
#if PLATFORM(CG)
if (state().m_strokeStyle->canvasGradient()) {
// Shading works on the entire clip region, so convert the current path to a clip.
c->save();
CGContextReplacePathWithStrokedPath(c->platformContext());
CGContextClip(c->platformContext());
CGContextDrawShading(c->platformContext(), state().m_strokeStyle->canvasGradient()->gradient().platformGradient());
c->restore();
} else {
if (state().m_strokeStyle->pattern())
applyStrokePattern();
CGContextStrokePath(c->platformContext());
}
#elif PLATFORM(QT)
QPainterPath* path = m_path.platformPath();
QPainter* p = static_cast<QPainter*>(c->platformContext());
if (state().m_strokeStyle->canvasGradient()) {
p->save();
p->setBrush(*(state().m_strokeStyle->canvasGradient()->gradient().platformGradient()));
p->strokePath(*path, p->pen());
p->restore();
} else {
if (state().m_strokeStyle->pattern())
applyStrokePattern();
p->strokePath(*path, p->pen());
}
#elif PLATFORM(CAIRO) && !PLATFORM(BAL)
cairo_t* cr = c->platformContext();
cairo_save(cr);
if (state().m_strokeStyle->canvasGradient()) {
cairo_set_source(cr, state().m_strokeStyle->canvasGradient()->gradient().platformGradient());
c->addPath(m_path);
cairo_stroke(cr);
} else {
if (state().m_strokeStyle->pattern())
applyStrokePattern();
c->addPath(m_path);
cairo_stroke(cr);
}
cairo_restore(cr);
#elif PLATFORM(BAL)
//FIXME
notImplemented();
#endif
#if ENABLE(DASHBOARD_SUPPORT)
clearPathForDashboardBackwardCompatibilityMode();
#endif
}
