mesa: optionally associate a gl_program to ATI_fragment_shader

the state tracker will use it

Acked-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Miklós Máté <mtmkls@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>

src/mesa/drivers/common/driverfuncs.c

@@ -117,6 +117,9 @@ _mesa_init_driver_functions(struct dd_function_table *driver)
    driver->NewProgram = _mesa_new_program;
    driver->DeleteProgram = _mesa_delete_program;
 
+   /* ATI_fragment_shader */
+   driver->NewATIfs = NULL;
+
    /* simple state commands */
    driver->AlphaFunc = NULL;
    driver->BlendColor = NULL;

src/mesa/main/atifragshader.c

@@ -30,6 +30,7 @@
 #include "main/mtypes.h"
 #include "main/dispatch.h"
 #include "main/atifragshader.h"
+#include "program/program.h"
 
 #define MESA_DEBUG_ATI_FS 0
 
@@ -63,6 +64,7 @@ _mesa_delete_ati_fragment_shader(struct gl_context *ctx, struct ati_fragment_sha
       free(s->Instructions[i]);
       free(s->SetupInst[i]);
    }
+   _mesa_reference_program(ctx, &s->Program, NULL);
    free(s);
 }
 
@@ -321,6 +323,8 @@ _mesa_BeginFragmentShaderATI(void)
          free(ctx->ATIFragmentShader.Current->SetupInst[i]);
    }
 
+   _mesa_reference_program(ctx, &ctx->ATIFragmentShader.Current->Program, NULL);
+
    /* malloc the instructions here - not sure if the best place but its
       a start */
    for (i = 0; i < MAX_NUM_PASSES_ATI; i++) {
@@ -405,7 +409,14 @@ _mesa_EndFragmentShaderATI(void)
    }
 #endif
 
-   if (!ctx->Driver.ProgramStringNotify(ctx, GL_FRAGMENT_SHADER_ATI, NULL)) {
+   if (ctx->Driver.NewATIfs) {
+      struct gl_program *prog = ctx->Driver.NewATIfs(ctx,
+                                                     ctx->ATIFragmentShader.Current);
+      _mesa_reference_program(ctx, &ctx->ATIFragmentShader.Current->Program, prog);
+   }
+
+   if (!ctx->Driver.ProgramStringNotify(ctx, GL_FRAGMENT_SHADER_ATI,
+                                        curProg->Program)) {
       ctx->ATIFragmentShader.Current->isValid = GL_FALSE;
       /* XXX is this the right error? */
       _mesa_error(ctx, GL_INVALID_OPERATION,

src/mesa/main/dd.h

@@ -476,6 +476,11 @@ struct dd_function_table {
                                      GLuint id);
    /** Delete a program */
    void (*DeleteProgram)(struct gl_context *ctx, struct gl_program *prog);   
+   /**
+    * Allocate a program to associate with the new ATI fragment shader (optional)
+    */
+   struct gl_program * (*NewATIfs)(struct gl_context *ctx,
+                                   struct ati_fragment_shader *curProg);
    /**
     * Notify driver that a program string (and GPU code) has been specified
     * or modified.  Return GL_TRUE or GL_FALSE to indicate if the program is

src/mesa/main/mtypes.h

@@ -2196,6 +2196,7 @@ struct ati_fragment_shader
    GLboolean interpinp1;
    GLboolean isValid;
    GLuint swizzlerq;
+   struct gl_program *Program;
 };
 
 /**

src/mesa/main/state.c

@@ -124,7 +124,8 @@ update_program(struct gl_context *ctx)
     * follows:
     *   1. OpenGL 2.0/ARB vertex/fragment shaders
     *   2. ARB/NV vertex/fragment programs
-    *   3. Programs derived from fixed-function state.
+    *   3. ATI fragment shader
+    *   4. Programs derived from fixed-function state.
     *
     * Note: it's possible for a vertex shader to get used with a fragment
     * program (and vice versa) here, but in practice that shouldn't ever
@@ -152,6 +153,17 @@ update_program(struct gl_context *ctx)
       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram,
 			       NULL);
    }
+   else if (ctx->ATIFragmentShader._Enabled &&
+            ctx->ATIFragmentShader.Current->Program) {
+       /* Use the enabled ATI fragment shader's associated program */
+      _mesa_reference_shader_program(ctx,
+                                     &ctx->_Shader->_CurrentFragmentProgram,
+                                     NULL);
+      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
+                               gl_fragment_program(ctx->ATIFragmentShader.Current->Program));
+      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram,
+                               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);