I'm extending my MozMFC example to handle rendering into a Win32 bitmap.
I start with the following ...
nsCOMPtr<nsICanvasRenderingContextInternal> context;
context =
do_CreateInstance("@mozilla.org/content/canvas-rendering-context;1?id=2d",
&rv);
if (!(NS_SUCCEEDED(rv) && context))
{
return 0;
}
context->SetDimensions(clientRect.Width(),clientRect.Height());
setDimensions() internally calls InitializeWithSurface(NULL, surface,
width, height);
Sadly InitializeWithSurface() triggers the following assertion:
NS_ASSERTION(!docShell ^ !mCanvasElement, "Cannot set both docshell and
canvas element");
Where am I going wrong here? Should there be some additional prior
initialization of the context? both docShell and mCanvasElement are null.
Thx++
Jerry
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