| Summary: | [FBO]IsFramebufferEXT should return true for names created by GenFramebuffersEXT | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | Shuang He <shuang.he> |
| Component: | Mesa core | Assignee: | Eric Anholt <eric> |
| Status: | VERIFIED INVALID | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | CC: | eric, mesa-dev |
| Version: | unspecified | ||
| Hardware: | Other | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | test case | ||
Created attachment 13260 [details]
test case
I believe Mesa is correct as-is. The GL_EXT_framebuffer_object spec says:
"""
The command
void GenFramebuffersEXT(sizei n, uint *ids);
returns <n> previously unused framebuffer object names in <ids>.
These names are marked as used, for the purposes of
GenFramebuffersEXT only, but they acquire state and type only when
they are first bound, just as if they were unused.
"""
So the ID doesn't really name an FBO until the ID has been bound.
This is consistant with NVIDIA's GL. It works the same way for texture objects too.
(In reply to comment #2) > I believe Mesa is correct as-is. The GL_EXT_framebuffer_object spec says: > > """ > The command > > void GenFramebuffersEXT(sizei n, uint *ids); > > returns <n> previously unused framebuffer object names in <ids>. > These names are marked as used, for the purposes of > GenFramebuffersEXT only, but they acquire state and type only when > they are first bound, just as if they were unused. > """ > > So the ID doesn't really name an FBO until the ID has been bound. > This is consistant with NVIDIA's GL. It works the same way for texture objects > too. > OK, you're right verified |
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System Environment: -------------------------- --Mesa:e54329233522591bbe8aad8a3fd6bcdc1e430f03 Bug detailed description: -------------------------- IsFramebufferEXT return false for names created by GenFramebuffersEXT, before these names are bound According to OpenGL spec, The command boolean IsFramebufferEXT( uint framebuffer ); returns TRUE if <framebuffer> is the name of an framebuffer object. If <framebuffer> is zero, or if <framebuffer> is a non-zero value that is not the name of an framebuffer object, IsFramebufferEXT return FALSE. IsFramebufferEXT should return TRUE for names created by GenFramebuffersEXT but the Mesa implementation is now depend this on whether this framebuffer name is bound. Reproduce steps: ---------------- start X compile and run the attached test case Current result: ---------------- IsFramebufferEXT return false for names created by GenFramebuffersEXT, before these names are bound Expected result: ---------------- IsFramebufferEXT should return true for names created by GenFramebuffersEXT, before these names are bound