Mesa/i915-crossbar.diff

Index: src/mesa/drivers/dri/i915/i915_context.h
===================================================================
RCS file: /cvs/mesa/Mesa/src/mesa/drivers/dri/i915/i915_context.h,v
retrieving revision 1.7
diff -u -r1.7 i915_context.h
--- src/mesa/drivers/dri/i915/i915_context.h	18 Aug 2006 09:04:48 -0000	1.7
+++ src/mesa/drivers/dri/i915/i915_context.h	16 Sep 2006 02:07:05 -0000
@@ -170,7 +176,7 @@
 
    /* Helpers for i915_texprog.c:
     */
-   GLuint src_texture;		/* Reg containing sampled texture color,
+   GLuint src_texture[8];	/* Reg containing sampled texture color,
 				 * else UREG_BAD.
 				 */
 
Index: src/mesa/drivers/dri/i915/i915_program.c
===================================================================
RCS file: /cvs/mesa/Mesa/src/mesa/drivers/dri/i915/i915_program.c,v
retrieving revision 1.6
diff -u -r1.6 i915_program.c
--- src/mesa/drivers/dri/i915/i915_program.c	18 Aug 2006 09:04:48 -0000	1.6
+++ src/mesa/drivers/dri/i915/i915_program.c	16 Sep 2006 02:07:09 -0000
@@ -405,7 +422,7 @@
    p->depth_written = 0;
    p->nr_params = 0;
 
-   p->src_texture = UREG_BAD;
+   for (int u = 0; u < 8; u++) p->src_texture[u] = UREG_BAD;
    p->src_previous = UREG(REG_TYPE_T, T_DIFFUSE);
    p->last_tex_stage = 0;
    p->VB = &tnl->vb;
Index: src/mesa/drivers/dri/i915/i915_texprog.c
===================================================================
RCS file: /cvs/mesa/Mesa/src/mesa/drivers/dri/i915/i915_texprog.c,v
retrieving revision 1.6
diff -u -r1.6 i915_texprog.c
--- src/mesa/drivers/dri/i915/i915_texprog.c	11 Apr 2006 11:41:11 -0000	1.6
+++ src/mesa/drivers/dri/i915/i915_texprog.c	16 Sep 2006 02:07:09 -0000
@@ -55,8 +55,18 @@
 			  GLenum src, GLuint unit )
 {
    switch (src) {
+      /* Crossbar: */
+   case GL_TEXTURE0:
+   case GL_TEXTURE1:
+   case GL_TEXTURE2:
+   case GL_TEXTURE3:
+   case GL_TEXTURE4:
+   case GL_TEXTURE5:
+   case GL_TEXTURE6:
+   case GL_TEXTURE7:
+      unit = src - GL_TEXTURE0;
    case GL_TEXTURE: 
-      if (p->src_texture == UREG_BAD) {
+      if (p->src_texture[unit] == UREG_BAD) {
 
 	 /* TODO: Use D0_CHANNEL_XY where possible.
 	  */
@@ -69,23 +79,10 @@
 	 if (p->VB->TexCoordPtr[unit]->size == 4)
 	    op = T0_TEXLDP;
 
-	 p->src_texture = i915_emit_texld( p, tmp, A0_DEST_CHANNEL_ALL, 
+	 p->src_texture[unit] = i915_emit_texld( p, tmp, A0_DEST_CHANNEL_ALL, 
 					  sampler, texcoord, op );
       }
-
-      return p->src_texture;
-
-      /* Crossbar: */
-   case GL_TEXTURE0:
-   case GL_TEXTURE1:
-   case GL_TEXTURE2:
-   case GL_TEXTURE3:
-   case GL_TEXTURE4:
-   case GL_TEXTURE5:
-   case GL_TEXTURE6:
-   case GL_TEXTURE7: {
-      return UREG_BAD;
-   }
+      return p->src_texture[unit];
 
    case GL_CONSTANT:
       return i915_emit_const4fv( p, p->ctx->Texture.Unit[unit].EnvColor );
@@ -555,9 +552,12 @@
       for (unit = 0 ; unit < ctx->Const.MaxTextureUnits; unit++)
 	 if (ctx->Texture.Unit[unit]._ReallyEnabled) {
 	    p->src_previous = emit_texenv( p, unit );
-	    p->src_texture = UREG_BAD;
 	    p->temp_flag = 0xffff000;
 	    p->temp_flag |= 1 << GET_UREG_NR(p->src_previous);
+	    /* FIXME: This could be cleverer. */
+            for (int u = 0; u < 8; u++) 
+              if (p->src_texture[u] != UREG_BAD)
+                p->temp_flag |= 1 << GET_UREG_NR(p->src_texture[u]);
 	 }
    }
 
Index: src/mesa/drivers/dri/i915/intel_context.c
===================================================================
RCS file: /cvs/mesa/Mesa/src/mesa/drivers/dri/i915/intel_context.c,v
retrieving revision 1.30
diff -u -r1.30 intel_context.c
--- src/mesa/drivers/dri/i915/intel_context.c	1 Sep 2006 23:36:30 -0000	1.30
+++ src/mesa/drivers/dri/i915/intel_context.c	16 Sep 2006 02:07:10 -0000
@@ -158,10 +158,6 @@
 
 /**
  * Extension strings exported by the intel driver.
- *
- * \note
- * It appears that ARB_texture_env_crossbar has "disappeared" compared to the
- * old i830-specific driver.
  */
 const struct dri_extension card_extensions[] =
 {
@@ -173,6 +169,7 @@
     { "GL_ARB_texture_cube_map",           NULL },
     { "GL_ARB_texture_env_add",            NULL },
     { "GL_ARB_texture_env_combine",        NULL },
+    { "GL_ARB_texture_env_crossbar",       NULL },
     { "GL_ARB_texture_env_dot3",           NULL },
     { "GL_ARB_texture_mirrored_repeat",    NULL },
     { "GL_ARB_texture_rectangle",          NULL },