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[cogl-fbo] Disable mipmap filters before calling glCheckFramebufferStatusEXT

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The framebuffer_object spec isn't clear in defining whether attaching a
texture as a renderbuffer with mipmap filtering enabled while the mipmaps
have not been uploaded should result in an incomplete framebuffer object.
(different drivers make different decisions)

To avoid an error with drivers that do consider this a problem we explicitly
set non mipmapped filters before calling glCheckFramebufferStatusEXT.  The
filters will later be reset when the texture is actually used for rendering
according to the filters set on the corresponding CoglMaterial.
This commit is contained in:
Robert Bragg 2009-09-15 16:27:45 +01:00
parent 561f5868e8
commit 0d08f6e070
1 changed files with 12 additions and 0 deletions
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12
clutter/cogl/gl/cogl-fbo.c
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@ -110,6 +110,18 @@ cogl_offscreen_new_to_texture (CoglHandle texhandle)
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, gl_stencil_handle) );
/* XXX: The framebuffer_object spec isn't clear in defining whether attaching
* a texture as a renderbuffer with mipmap filtering enabled while the
* mipmaps have not been uploaded should result in an incomplete framebuffer
* object. (different drivers make different decisions)
*
* To avoid an error with drivers that do consider this a problem we
* explicitly set non mipmapped filters here. These will later be reset when
* the texture is actually used for rendering according to the filters set on
* the corresponding CoglMaterial.
*/
_cogl_texture_set_filters (texhandle, GL_NEAREST, GL_NEAREST);
/* Make sure it's complete */
status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);