void
nsDisplayCanvasBackground::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx)
{
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
nsPoint offset = ToReferenceFrame();
nsRect bgClipRect = frame->CanvasArea() + offset;
if (mIsBottommostLayer && NS_GET_A(mExtraBackgroundColor) > 0) {
aCtx->SetColor(mExtraBackgroundColor);
aCtx->FillRect(bgClipRect);
}
bool snap;
nsRect bounds = GetBounds(aBuilder, &snap);
nsRenderingContext context;
nsRefPtr<gfxContext> dest = aCtx->ThebesContext();
nsRefPtr<gfxASurface> surf;
nsRefPtr<gfxContext> ctx;
#ifndef MOZ_GFX_OPTIMIZE_MOBILE
if (IsSingleFixedPositionImage(aBuilder, bgClipRect) && aBuilder->IsPaintingToWindow() && !aBuilder->IsCompositingCheap()) {
surf = static_cast<gfxASurface*>(GetUnderlyingFrame()->Properties().Get(nsIFrame::CachedBackgroundImage()));
nsRefPtr<gfxASurface> destSurf = dest->CurrentSurface();
if (surf && surf->GetType() == destSurf->GetType()) {
BlitSurface(dest, mDestRect, surf);
return;
}
surf = destSurf->CreateSimilarSurface(gfxASurface::CONTENT_COLOR_ALPHA, gfxIntSize(ceil(mDestRect.width), ceil(mDestRect.height)));
if (surf) {
ctx = new gfxContext(surf);
ctx->Translate(-gfxPoint(mDestRect.x, mDestRect.y));
context.Init(aCtx->DeviceContext(), ctx);
}
}
#endif
nsCSSRendering::PaintBackground(mFrame->PresContext(), surf ? context : *aCtx, mFrame,
surf ? bounds : mVisibleRect,
nsRect(offset, mFrame->GetSize()),
aBuilder->GetBackgroundPaintFlags(),
&bgClipRect, mLayer);
if (surf) {
BlitSurface(dest, mDestRect, surf);
GetUnderlyingFrame()->Properties().Set(nsIFrame::CachedBackgroundImage(), surf.forget().get());
GetUnderlyingFrame()->AddStateBits(NS_FRAME_HAS_CACHED_BACKGROUND);
}
}
void
nsDisplayCanvasBackgroundImage::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx)
{
nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
nsPoint offset = ToReferenceFrame();
nsRect bgClipRect = frame->CanvasArea() + offset;
nsRenderingContext context;
nsRefPtr<gfxContext> dest = aCtx->ThebesContext();
nsRefPtr<gfxASurface> surf;
nsRefPtr<gfxContext> ctx;
gfxRect destRect;
#ifndef MOZ_GFX_OPTIMIZE_MOBILE
if (IsSingleFixedPositionImage(aBuilder, bgClipRect, &destRect) &&
aBuilder->IsPaintingToWindow() && !aBuilder->IsCompositingCheap() &&
!dest->CurrentMatrix().HasNonIntegerTranslation()) {
// Snap image rectangle to nearest pixel boundaries. This is the right way
// to snap for this context, because we checked HasNonIntegerTranslation above.
destRect.Round();
surf = static_cast<gfxASurface*>(GetUnderlyingFrame()->Properties().Get(nsIFrame::CachedBackgroundImage()));
nsRefPtr<gfxASurface> destSurf = dest->CurrentSurface();
if (surf && surf->GetType() == destSurf->GetType()) {
BlitSurface(dest, destRect, surf);
return;
}
surf = destSurf->CreateSimilarSurface(gfxASurface::CONTENT_COLOR_ALPHA,
gfxIntSize(destRect.width, destRect.height));
if (surf) {
ctx = new gfxContext(surf);
ctx->Translate(-gfxPoint(destRect.x, destRect.y));
context.Init(aCtx->DeviceContext(), ctx);
}
}
#endif
PaintInternal(aBuilder,
surf ? &context : aCtx,
surf ? bgClipRect: mVisibleRect,
&bgClipRect);
if (surf) {
BlitSurface(dest, destRect, surf);
frame->Properties().Set(nsIFrame::CachedBackgroundImage(), surf.forget().get());
}
}
