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Fix compilation with older libGL

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the mutlitexture and texture_rectangle extensions have recently
been incorporated into the GL core; fixes needed to work with
libGL that proceeds that:

GL_TEXTURE_RECTANGLE_ARB - use _ARB name
glActiveTextureARB() - use get_proc_address

https://bugzilla.gnome.org/show_bug.cgi?id=602870
This commit is contained in:
Owen W. Taylor 2009-11-24 15:53:32 -05:00
parent 14987f2b21
commit bdb3be7084
1 changed files with 8 additions and 6 deletions
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14
src/compositor/mutter-texture-tower.c
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@ -32,6 +32,7 @@
#endif
#if !CLUTTER_CHECK_VERSION(1,1,3)
static PFNGLACTIVETEXTUREPROC activeTexture;
static PFNGLGENFRAMEBUFFERSPROC genFramebuffers;
static PFNGLDELETEFRAMEBUFFERSPROC deleteFramebuffers;
static PFNGLBINDFRAMEBUFFERPROC bindFramebuffer;
@ -488,6 +489,7 @@ initialize_gl_functions (void)
{
initialized = TRUE;
activeTexture = (PFNGLACTIVETEXTUREPROC) cogl_get_proc_address ("glActiveTextureARB");
genFramebuffers = (PFNGLGENFRAMEBUFFERSPROC) cogl_get_proc_address ("glGenFramebuffersEXT");
deleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC) cogl_get_proc_address ("glDeleteFramebuffersEXT");
bindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC) cogl_get_proc_address ("glBindFramebufferEXT");
@ -550,9 +552,9 @@ texture_tower_revalidate_fbo (MutterTextureTower *tower,
cogl_texture_get_gl_texture (source_texture, &source_gl_tex, &source_gl_target);
glActiveTextureARB (GL_TEXTURE0_ARB);
(*activeTexture) (GL_TEXTURE0_ARB);
if (source_gl_target == GL_TEXTURE_2D)
glDisable (GL_TEXTURE_RECTANGLE);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
else
glDisable (GL_TEXTURE_2D);
glEnable (source_gl_target);
@ -568,12 +570,12 @@ texture_tower_revalidate_fbo (MutterTextureTower *tower,
* than three are used by Mutter and all GL implementations we care
* about will support at least 3.
*/
glActiveTextureARB (GL_TEXTURE1_ARB);
(*activeTexture) (GL_TEXTURE1_ARB);
glDisable (GL_TEXTURE_2D);
glDisable (GL_TEXTURE_RECTANGLE);
glActiveTextureARB (GL_TEXTURE2_ARB);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
(*activeTexture) (GL_TEXTURE2_ARB);
glDisable (GL_TEXTURE_2D);
glDisable (GL_TEXTURE_RECTANGLE);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
glViewport (0, 0, dest_texture_width, dest_texture_height);