Bug 45504 – [chromium] Don't call deleteTexture on a texture attached to an FBO that is not currently bound

• Component: New Bugs
• Status: RESOLVED FIXED

[James Robinson]

[chromium] Don't call deleteTexture on a texture attached to an FBO that is not currently bound

[James Robinson]

Created attachment 67123 [details]
Patch

[James Robinson]

Note that in addition to this not quite doing what we want, ANGLE currently crashes if you delete a texture attached to the non-current FBO.  The ANGLE crash will be fixed as well.

[Kenneth Russell]

Comment on attachment 67123 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=67123&action=prettypatch

Basically looks fine. One comment.

> WebCore/platform/graphics/chromium/DrawingBufferChromium.cpp:121
> +    m_context->deleteTexture(m_internal->offscreenColorTexture);
You don't really need to delete the texture and create a new one in this case. All you need is to call texImage2D against the texture object again to reallocate its storage to the new size. You might consider doing that instead.

[James Robinson]

(In reply to comment #3)
> (From update of attachment 67123 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=67123&action=prettypatch
> 
> Basically looks fine. One comment.
> 
> > WebCore/platform/graphics/chromium/DrawingBufferChromium.cpp:121
> > +    m_context->deleteTexture(m_internal->offscreenColorTexture);
> You don't really need to delete the texture and create a new one in this case. All you need is to call texImage2D against the texture object again to reallocate its storage to the new size. You might consider doing that instead.

That's a very good point.  I'll update the patch to do it that way instead.  Do I have to respecify the texParameters()s after doing that?

[James Robinson]

Created attachment 67138 [details]
Patch

[James Robinson]

Patch assumes I don't have to specify the texParameters again (which from basic testing appears to be the case).

[Kenneth Russell]

Comment on attachment 67138 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=67138&action=prettypatch

Looks good to me. To answer your question above, no, you don't need to respecify the texture parameters -- they are associated with the texture object, and you are not deleting that, only reallocating its associated texel storage.

[James Robinson]

Committed r67156: <http://trac.webkit.org/changeset/67156>