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cogl-vertex-buffer: Add support for unsigned int indices

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This adds a COGL_INDICES_TYPE_UNSIGNED_INT enum value so that unsigned
ints can be used with cogl_vertex_buffer_indices_new.  Unsigned ints
are not supported in core on GLES so a feature flag has also been
added to advertise this. GLES only sets the feature if the
GL_OES_element_index_uint extension is available. It is an error to
call indices_new() with unsigned ints unless the feature is
advertised.

http://bugzilla.openedhand.com/show_bug.cgi?id=1998
This commit is contained in:
Neil Roberts
2010-02-23 14:45:44 +00:00
parent b583083a3f
commit 82fd07c54a
5 changed files with 37 additions and 3 deletions
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17
cogl/cogl-vertex-buffer.c
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@ -171,6 +171,11 @@
#endif
/* This isn't defined in the GLES headers */
#ifndef GL_UNSIGNED_INT
#define GL_UNSIGNED_INT 0x1405
#endif
/*
* GL/GLES compatability defines for shader things:
*/
@ -1782,8 +1787,10 @@ get_indices_type_size (GLuint indices_type)
{
if (indices_type == GL_UNSIGNED_BYTE)
return sizeof (GLubyte);
if (indices_type == GL_UNSIGNED_SHORT)
else if (indices_type == GL_UNSIGNED_SHORT)
return sizeof (GLushort);
else if (indices_type == GL_UNSIGNED_INT)
return sizeof (GLuint);
else
{
g_critical ("Unknown indices type %d\n", indices_type);
@ -1809,6 +1816,14 @@ cogl_vertex_buffer_indices_new (CoglIndicesType indices_type,
indices->type = GL_UNSIGNED_BYTE;
else if (indices_type == COGL_INDICES_TYPE_UNSIGNED_SHORT)
indices->type = GL_UNSIGNED_SHORT;
else if (indices_type == COGL_INDICES_TYPE_UNSIGNED_INT)
{
g_return_val_if_fail (cogl_features_available
(COGL_FEATURE_UNSIGNED_INT_INDICES),
COGL_INVALID_HANDLE);
indices->type = GL_UNSIGNED_INT;
}
else
{
g_critical ("unknown indices type %d", indices_type);