Mesa (master): mesa: initial changes for GL_NV_texture_env_combine4

[Brian Paul]

Module: Mesa
Branch: master
Commit: f5d3027c0a03e26fe90efc067766c996dea05948
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f5d3027c0a03e26fe90efc067766c996dea05948

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Jan 23 17:29:26 2009 -0700

mesa: initial changes for GL_NV_texture_env_combine4

---

 src/mesa/main/extensions.c |    1 +
 src/mesa/main/mtypes.h     |   18 ++++++++----------
 2 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 43c9d4a..42de564 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -155,6 +155,7 @@ static const struct {
    { OFF, "GL_NV_fragment_program",            F(NV_fragment_program) },
    { ON,  "GL_NV_light_max_exponent",          F(NV_light_max_exponent) },
    { OFF, "GL_NV_point_sprite",                F(NV_point_sprite) },
+   { OFF, "GL_NV_texture_env_combine4",        F(NV_texture_env_combine4) },
    { OFF, "GL_NV_texture_rectangle",           F(NV_texture_rectangle) },
    { ON,  "GL_NV_texgen_reflection",           F(NV_texgen_reflection) },
    { OFF, "GL_NV_vertex_program",              F(NV_vertex_program) },
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 39c988f..b09c591 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1468,23 +1468,20 @@ struct gl_texture_object
 
 /**
  * Texture combine environment state.
- * 
- * \todo
- * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
- * structure will need to be expanded for 4 elements.
+ * Up to four combiner sources are possible with GL_NV_texture_env_combine4.
  */
 struct gl_tex_env_combine_state
 {
    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
-   GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
-   GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
-   GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
-   GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
+   GLenum SourceRGB[4];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
+   GLenum SourceA[4];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
+   GLenum OperandRGB[4]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
+   GLenum OperandA[4];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
-   GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
-   GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
+   GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
+   GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
 };
 
 
@@ -2649,6 +2646,7 @@ struct gl_extensions
    GLboolean NV_light_max_exponent;
    GLboolean NV_point_sprite;
    GLboolean NV_texgen_reflection;
+   GLboolean NV_texture_env_combine4;
    GLboolean NV_texture_rectangle;
    GLboolean NV_vertex_program;
    GLboolean NV_vertex_program1_1;