static inline bool createMaskAndSwapContextForTextGradient(
GraphicsContext*& context, GraphicsContext*& savedContext,
OwnPtr<ImageBuffer>& imageBuffer, const RenderObject* object)
{
FloatRect maskBBox = const_cast<RenderObject*>(findTextRootObject(object))->relativeBBox(false);
IntRect maskRect = enclosingIntRect(object->absoluteTransform().mapRect(maskBBox));
IntSize maskSize(maskRect.width(), maskRect.height());
clampImageBufferSizeToViewport(object->document()->renderer(), maskSize);
auto_ptr<ImageBuffer> maskImage = ImageBuffer::create(maskSize, false);
if (!maskImage.get())
return false;
GraphicsContext* maskImageContext = maskImage->context();
maskImageContext->save();
maskImageContext->translate(-maskRect.x(), -maskRect.y());
maskImageContext->concatCTM(object->absoluteTransform());
imageBuffer.set(maskImage.release());
savedContext = context;
context = maskImageContext;
return true;
}
static inline void clipToTextMask(GraphicsContext* context,
OwnPtr<ImageBuffer>& imageBuffer, const RenderObject* object,
const SVGPaintServerGradient* gradientServer)
{
FloatRect maskBBox = const_cast<RenderObject*>(findTextRootObject(object))->relativeBBox(false);
// Fixup transformations to be able to clip to mask
TransformationMatrix transform = object->absoluteTransform();
FloatRect textBoundary = transform.mapRect(maskBBox);
IntSize maskSize(lroundf(textBoundary.width()), lroundf(textBoundary.height()));
clampImageBufferSizeToViewport(object->document()->renderer(), maskSize);
textBoundary.setSize(textBoundary.size().shrunkTo(maskSize));
// Clip current context to mask image (gradient)
context->concatCTM(transform.inverse());
context->clipToImageBuffer(textBoundary, imageBuffer.get());
context->concatCTM(transform);
if (gradientServer->boundingBoxMode()) {
context->translate(maskBBox.x(), maskBBox.y());
context->scale(FloatSize(maskBBox.width(), maskBBox.height()));
}
context->concatCTM(gradientServer->gradientTransform());
}
void CGdiBlitMasked::BaseTest(const TRect &aRect, TInt)
{
// needs re-writing to emulate tiling of the source rect
if (!aRect.Intersects(TRect(BaseWin->Size())))
return;
TSize size(aRect.Size());
TSize bitSize=iBitmap->SizeInPixels();
if (size.iWidth>bitSize.iWidth)
size.iWidth=bitSize.iWidth;
if (size.iHeight>bitSize.iHeight)
size.iHeight=bitSize.iHeight;
//
// Set up the scratch mask as a black and white bitmap containing the mask to blit
// The mask pattern is replicated all over the scratchmask bitmap
//
iScratchMaskGc->SetBrushStyle(CGraphicsContext::ESolidBrush);
iScratchMaskGc->SetPenStyle(CGraphicsContext::ENullPen);
iScratchMaskGc->SetBrushColor(TRgb(0,0,0));
iScratchMaskGc->DrawRect(TRect(iScratchMask->SizeInPixels()));
iScratchMaskGc->SetPenColor(TRgb(255,255,255));
iScratchMaskGc->SetPenStyle(CGraphicsContext::ESolidPen);
TSize maskSize(iCurrMask->SizeInPixels());
TPoint pos;
TRgb *rgbBuf=(TRgb *)User::AllocL(maskSize.iWidth*sizeof(TRgb)); //Doesn't do any harm if it leaves
for(pos.iY=0;pos.iY<maskSize.iHeight;pos.iY++)
{
TPtr8 ptr((TUint8 *)rgbBuf,maskSize.iWidth*sizeof(TRgb));
iCurrMask->GetScanLine(ptr, pos, maskSize.iWidth, ERgb);
for(TInt index=0;index<maskSize.iWidth;index++)
{
iScratchMaskGc->SetPenColor(rgbBuf[index]);
// if ((isLow && !iLowCutOff) || (!isLow && iLowCutOff))
iScratchMaskGc->Plot(TPoint(index,pos.iY));
}
}
User::Free(rgbBuf);
for(pos.iY=0;pos.iY<size.iHeight;pos.iY+=maskSize.iHeight)
for(pos.iX=0;pos.iX<size.iWidth;pos.iX+=maskSize.iWidth)
iScratchMaskGc->CopyRect(pos, TRect(maskSize));
//
// Blit this to the screen in ANDNOT mode to clear all the pixels we want the mask blit to draw to
//
iGdi->SetDrawMode(CGraphicsContext::EDrawModeANDNOT);
iGdi->BitBlt(aRect.iTl, iScratchMask, TRect(size));
//
// Copy the test bitmap to the scratch bitmap then use the scratch mask to clear all the bits
// that should masked out of the draw to the screen
//
iScratchGc->SetDrawMode(CGraphicsContext::EDrawModePEN);
iScratchGc->BitBlt(TPoint(0,0), iBitmap);
iScratchGc->SetDrawMode(CGraphicsContext::EDrawModeAND);
iScratchGc->BitBlt(TPoint(0,0), iScratchMask);
//
// Now copy the scratch bitmap to the screen in OR mode to get the final result
//
iGdi->SetDrawMode(CGraphicsContext::EDrawModeOR);
iGdi->BitBlt(aRect.iTl, iScratch, TRect(size));
}