+ if (ctx->Extensions.EXT_point_parameters) {
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
+ return;
+ }
+ if (ctx->Point.Threshold == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.Threshold = params[0];
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ break;
+ case GL_POINT_SPRITE_R_MODE_NV:
+ /* This is one area where ARB_point_sprite and NV_point_sprite
+ * differ. In ARB_point_sprite the POINT_SPRITE_R_MODE is
+ * always ZERO. NV_point_sprite adds the S and R modes.
+ */
+ if (ctx->Extensions.NV_point_sprite) {
+ GLenum value = (GLenum) params[0];
+ if (value != GL_ZERO && value != GL_S && value != GL_R) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)");
+ return;
+ }
+ if (ctx->Point.SpriteRMode == value)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.SpriteRMode = value;
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ break;
+ case GL_POINT_SPRITE_COORD_ORIGIN:
+ 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,
+ "glPointParameterf[v]{EXT,ARB}(param)");
+ return;
+ }
+ if (ctx->Point.SpriteOrigin == value)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.SpriteOrigin = value;
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");