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authorIan Romanick <ian.d.romanick@intel.com>2009-11-25 16:31:28 -0800
committerIan Romanick <ian.d.romanick@intel.com>2009-11-25 16:31:28 -0800
commit0528f40e3b8ca3e59d3a641c4504d34cf9364578 (patch)
treed3ce521a33b87afa090e73decb34ca3de0170454
parente4c5fe52c99bdf651aafa1569d9cf901891004d8 (diff)
Improve implementation of GL_POINT_SPRITE_COORD_ORIGIN errors
This enum is only supported for OpenGL 2.0. If a driver supports OpenGL 1.4 and GL_ARB_point_sprite, using this enum should generate an error. This is important because, for example, i915 and i830 can support GL_ARB_point_sprite, but they cannot support GL_POINT_SPRITE_COORD_ORIGIN. This commit just removes the check for NV_point_sprite, which is completely wrong, and add some comments describing what the code should do. I don't see an easy way to check for version >= 2.0 from inside Mesa. Perhaps we should add an extension GL_MESA_point_sprite_20 (like Intel's old GL_EXT_packed_pixels_12) to indicate that this added bit of functionality is available. Also note that glean's pointSprite test only checks for GL_ARB_point_sprite before trying to use GL_POINT_SPRITE_COORD_ORIGIN. Naturally, that fails on non-2.0 implementations (i.e., Mac OS X on GMA 950).
-rw-r--r--src/mesa/main/points.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/mesa/main/points.c b/src/mesa/main/points.c
index 4c8fc1f72e0..b3305448904 100644
--- a/src/mesa/main/points.c
+++ b/src/mesa/main/points.c
@@ -200,7 +200,12 @@ _mesa_PointParameterfv( GLenum pname, const GLfloat *params)
}
break;
case GL_POINT_SPRITE_COORD_ORIGIN:
- if (ctx->Extensions.ARB_point_sprite || ctx->Extensions.NV_point_sprite) {
+ /* This is not completely correct. GL_POINT_SPRITE_COORD_ORIGIN was
+ * added to point sprites when the extension was merged into OpenGL
+ * 2.0. It is expected that an implementation supporting OpenGL 1.4
+ * and GL_ARB_point_sprite will generate an error here.
+ */
+ if (ctx->Extensions.ARB_point_sprite) {
GLenum value = (GLenum) params[0];
if (value != GL_LOWER_LEFT && value != GL_UPPER_LEFT) {
_mesa_error(ctx, GL_INVALID_VALUE,