Mesa (master): mesa: Add gl_MESAFogParamsOptimized for our special pre-computed fog params.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 29e013e58be93aa6ed760393cf77ef34ca1d57c0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=29e013e58be93aa6ed760393cf77ef34ca1d57c0

Author: Eric Anholt <eric at anholt.net>
Date:   Tue Nov 23 15:55:59 2010 -0800

mesa: Add gl_MESAFogParamsOptimized for our special pre-computed fog params.

It would be nice if we handled optimized uniform math like this in
some generic way, since people often end up doing uniform expressions
in shaders, but for now keep this hard-coded like it was in the
texenvprogram code.

---

 src/glsl/builtin_variables.h |    1 +
 src/mesa/main/uniforms.c     |    5 +++++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/glsl/builtin_variables.h b/src/glsl/builtin_variables.h
index dfc93f3..9b4f5d9 100644
--- a/src/glsl/builtin_variables.h
+++ b/src/glsl/builtin_variables.h
@@ -105,5 +105,6 @@ static const builtin_variable builtin_110_deprecated_uniforms[] = {
    /* Mesa-internal ATI_envmap_bumpmap state. */
    { ir_var_uniform, -1, "vec2", "gl_MESABumpRotMatrix0"},
    { ir_var_uniform, -1, "vec2", "gl_MESABumpRotMatrix1"},
+   { ir_var_uniform, -1, "vec4", "gl_MESAFogParamsOptimized"},
 };
 
diff --git a/src/mesa/main/uniforms.c b/src/mesa/main/uniforms.c
index c31c075..1d74efa 100644
--- a/src/mesa/main/uniforms.c
+++ b/src/mesa/main/uniforms.c
@@ -217,6 +217,10 @@ static struct gl_builtin_uniform_element gl_MESABumpRotMatrix1_elements[] = {
    {NULL, {STATE_INTERNAL, STATE_ROT_MATRIX_1}, SWIZZLE_XYZW},
 };
 
+static struct gl_builtin_uniform_element gl_MESAFogParamsOptimized_elements[] = {
+   {NULL, {STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED}, SWIZZLE_XYZW},
+};
+
 #define MATRIX(name, statevar, modifier)				\
    static struct gl_builtin_uniform_element name ## _elements[] = {	\
       { NULL, { statevar, 0, 0, 0, modifier}, SWIZZLE_XYZW },		\
@@ -322,6 +326,7 @@ const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[] = {
 
    STATEVAR(gl_MESABumpRotMatrix0),
    STATEVAR(gl_MESABumpRotMatrix1),
+   STATEVAR(gl_MESAFogParamsOptimized),
 
    {NULL, NULL, 0}
 };