* clutter/cogl/gl/cogl-texture.c (cogl_texture_polygon)
(_cogl_texture_quad_sw, _cogl_texture_quad_hw):
* clutter/cogl/gles/cogl-texture.c (cogl_texture_polygon)
(_cogl_texture_quad_sw, _cogl_texture_quad_hw): Enable backface
culling in GL if it is requested.
* clutter/cogl/gles/cogl-texture.c (_cogl_texture_quad_sw)
(_cogl_texture_quad_hw):
* clutter/cogl/gl/cogl-texture.c (_cogl_texture_quad_sw)
(_cogl_texture_quad_hw): Reorder the
vertices so that they are counter-clockwise.
* clutter/cogl/gles/cogl-context.h (CoglContext):
* clutter/cogl/gl/cogl-context.h (CoglContext): Added a flag to
store whether backface culling is currently enabled.
* clutter/cogl/gles/cogl.c (cogl_enable_backface_culling):
* clutter/cogl/gl/cogl.c (cogl_enable_backface_culling): New
function
* doc/reference/cogl/cogl-sections.txt: Add
cogl_enable_backface_culling
* clutter/cogl/gles/cogl.c (error_string): Rename to
_cogl_error_string and remove the static scoping so that it can be
called in cogl-texture etc.
* clutter/cogl/gl/cogl-texture.c (cogl_texture_new_from_foreign):
* clutter/cogl/gles/cogl-texture.c (cogl_texture_new_from_foreign):
GE(*) can't be used to wrap around calls that use the return
value.
* clutter/cogl/gl/cogl-texture.c (_cogl_texture_quad_sw)
(_cogl_texture_quad_hw, cogl_texture_polygon): Remove GE(*)
wrapper around calls in the middle of a glBegin/glEnd pair which
otherwise always generate an error because glGetError can only be
called outside of the pair.
* clutter/cogl/gl/cogl-internal.h: Include stdio.h when definig
COGL_DEBUG and declare a prototype for _cogl_error_string.
* clutter/cogl/gles/cogl-internal.h: Match GE(*) macro to GL
version.
(cogl_texture_download_from_gl:) Store old blending factors
and restore them when done. The lack of ability to retrieve
the alpha channel now more noticable in test-cogl-tex-getset
since the edges of the hand are not antialiased.
* clutter/cogl/gl(es)/cogl-internal.h: Declare
cogl_blend_func to avoid "implicit implementation" compile
warning.
