From b4452c3baad6e0379eeb7f22f2e51d13999e1323 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 12 Jan 2011 12:27:12 -0800
Subject: [PATCH] mesa: Track a computed _CurrentFragmentProgram for current
 gl_shader_program

This is like how we track FragmentProgram._Current for the computed
ARB fragment program for fixed function texenv, but this gives direct
access to the gl_shader_program for drivers to codegen from, skipping
ARB_fp.
---
 src/mesa/main/mtypes.h |  1 +
 src/mesa/main/state.c  | 13 +++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 4f83e2e55c2..81e281941d9 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2191,6 +2191,7 @@ struct gl_shader_state
    struct gl_shader_program *CurrentVertexProgram;
    struct gl_shader_program *CurrentGeometryProgram;
    struct gl_shader_program *CurrentFragmentProgram;
+   struct gl_shader_program *_CurrentFragmentProgram;
 
    /**
     * Program used by glUniform calls.
diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index 1b2b2f32464..cf9fe8921f3 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -43,6 +43,7 @@
 #include "pixel.h"
 #include "program/program.h"
 #include "program/prog_parameter.h"
+#include "shaderobj.h"
 #include "state.h"
 #include "stencil.h"
 #include "texenvprogram.h"
@@ -249,7 +250,7 @@ update_program(struct gl_context *ctx)
 {
    const struct gl_shader_program *vsProg = ctx->Shader.CurrentVertexProgram;
    const struct gl_shader_program *gsProg = ctx->Shader.CurrentGeometryProgram;
-   const struct gl_shader_program *fsProg = ctx->Shader.CurrentFragmentProgram;
+   struct gl_shader_program *fsProg = ctx->Shader.CurrentFragmentProgram;
    const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;
    const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current;
    const struct gl_geometry_program *prevGP = ctx->GeometryProgram._Current;
@@ -275,20 +276,22 @@ update_program(struct gl_context *ctx)
       /* Use shader programs */
       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
                                fsProg->FragmentProgram);
+      _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,
+				     fsProg);
    }
    else if (ctx->FragmentProgram._Enabled) {
       /* use user-defined fragment program */
       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
                                ctx->FragmentProgram.Current);
+      _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,
+				     NULL);
    }
    else if (ctx->FragmentProgram._MaintainTexEnvProgram) {
       /* Use fragment program generated from fixed-function state.
        */
       struct gl_shader_program *f = _mesa_get_fixed_func_fragment_program(ctx);
-#if 0
       _mesa_reference_shader_program(ctx,
-				     &ctx->Shader.CurrentFragmentProgram, f);
-#endif
+				     &ctx->Shader._CurrentFragmentProgram, f);
 
       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
                                f->FragmentProgram);
@@ -296,6 +299,8 @@ update_program(struct gl_context *ctx)
    else {
       /* no fragment program */
       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
+      _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,
+				     NULL);
    }
 
    if (gsProg && gsProg->LinkStatus && gsProg->GeometryProgram) {
-- 
2.11.0