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cogl: define GL_READ/DRAW_FRAMEBUFFER_EXT if not available
Bug 913 - cogl fails to build on OSX * clutter/cogl/gl/cogl-fbo.c: define GL_READ_FRAMEBUFFER_EXT and GL_DRAW_FRAMEBUFFER_EXT if not defined in the build system. The #ifdef can fail if they're not #defines but variables or enums. As the values are supposed to be industry standard even then it shouldn't have ill effects.
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@ -48,6 +48,13 @@
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#define glBlitFramebufferEXT ctx->pf_glBlitFramebufferEXT
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#define glRenderbufferStorageMultisampleEXT ctx->pf_glRenderbufferStorageMultisampleEXT
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#ifndef GL_READ_FRAMEBUFFER_EXT
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#define GL_READ_FRAMEBUFFER_EXT 0x8CA8
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#endif
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#ifndef GL_DRAW_FRAMEBUFFER_EXT
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#define GL_DRAW_FRAMEBUFFER_EXT 0x8CA9
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#endif
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static void _cogl_offscreen_free (CoglFbo *fbo);
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COGL_HANDLE_DEFINE (Fbo, offscreen, fbo_handles);
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