342523 - mask element does not work under thebes

Status: RESOLVED DUPLICATE of bug 331130

(Core :: SVG, defect)

Description

[Robert Longson [:longsonr]]

nsSVGCairoCanvas::Init goes into the ifdef MOZ_ENABLE_CAIRO_GFX and which does not initialise mHeight or mWidth. When the mask element c

Unfortunately nsThebesRenderingContext::GetDrawingSurface returns NS_ERROR_NOT_IMPLEMENTED so we can't use that to get the dimensions and I'm not sure we could get the dimensions from a thebes drawing surface anyway.

Perhaps we can do something similar to patterns.

Comment 1

[Robert Longson [:longsonr]]

Even if I fix nsSVGMaskFrame::MaskPaint to create its own surface there are still 3 other calls to nsSVGUtils::GetSurface in nsSVGUtils. I think I need to replace the call to aCanvas->GetSurfaceSize with something that gets the size of the outerSVGFrame in appropriate units.

Any hints on this would be gratefully accepted.

Comment 2

[tor]

There is some thought to using the group push/pop functionality recently added to cairo for opacity.  It could be used for mask as well, though there is the complication that the svg definition of mask uses all four channels of the image rather than just one.

Comment 3

[tor]

*** This bug has been marked as a duplicate of 331130 ***