From 971bdc193cb4ce07f4ca20bac13276095b5f0b83 Mon Sep 17 00:00:00 2001
From: Eric Anholt <anholt@FreeBSD.org>
Date: Mon, 24 Oct 2005 09:02:07 +0000
Subject: [PATCH] Fix the GL_BLEND case (and remove the fallback associated
 with it) by converting the float values to bytes before packing them.  Tested
 with texenv.

---
 src/mesa/drivers/dri/sis/sis_texstate.c | 39 ++++++++++++---------------------
 src/mesa/drivers/dri/sis/sis_tris.c     |  4 ++--
 2 files changed, 16 insertions(+), 27 deletions(-)

diff --git a/src/mesa/drivers/dri/sis/sis_texstate.c b/src/mesa/drivers/dri/sis/sis_texstate.c
index 021919b..2a9bd56 100644
--- a/src/mesa/drivers/dri/sis/sis_texstate.c
+++ b/src/mesa/drivers/dri/sis/sis_texstate.c
@@ -34,6 +34,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include "glheader.h"
 #include "imports.h"
+#include "colormac.h"
 #include "context.h"
 #include "macros.h"
 #include "texformat.h"
@@ -52,7 +53,8 @@ sis_set_texture_env0( GLcontext *ctx, struct gl_texture_object *texObj,
    int unit )
 {
    sisContextPtr smesa = SIS_CONTEXT(ctx);
-   
+   GLubyte c[4];
+
    __GLSiSHardware *prev = &smesa->prev;
    __GLSiSHardware *current = &smesa->current;
 
@@ -63,7 +65,6 @@ sis_set_texture_env0( GLcontext *ctx, struct gl_texture_object *texObj,
    switch (texture_unit->EnvMode)
    {
    case GL_REPLACE:
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV0, 0);
       switch (t->format)
       {
       case GL_ALPHA:
@@ -85,7 +86,6 @@ sis_set_texture_env0( GLcontext *ctx, struct gl_texture_object *texObj,
       break;
 
    case GL_MODULATE:
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV0, 0);
       switch (t->format)
       {
       case GL_ALPHA:
@@ -107,7 +107,6 @@ sis_set_texture_env0( GLcontext *ctx, struct gl_texture_object *texObj,
       break;
 
    case GL_DECAL:
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV0, 0);
       switch (t->format)
       {
       case GL_RGB:
@@ -122,15 +121,11 @@ sis_set_texture_env0( GLcontext *ctx, struct gl_texture_object *texObj,
       break;
 
    case GL_BLEND:
-#if 1 /* XXX Blending broken */
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV0, 1);
-#else
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV0, 0);
-      current->hwTexEnvColor =
-         ((GLint) (texture_unit->EnvColor[3])) << 24 |
-         ((GLint) (texture_unit->EnvColor[0])) << 16 |
-         ((GLint) (texture_unit->EnvColor[1])) << 8 |
-         ((GLint) (texture_unit->EnvColor[2]));
+      UNCLAMPED_FLOAT_TO_RGBA_CHAN(c, texture_unit->EnvColor);
+      current->hwTexEnvColor = ((GLint) (c[3])) << 24 |
+			       ((GLint) (c[0])) << 16 |
+			       ((GLint) (c[1])) << 8 |
+			       ((GLint) (c[2]));
       switch (t->format)
       {
       case GL_ALPHA:
@@ -153,7 +148,6 @@ sis_set_texture_env0( GLcontext *ctx, struct gl_texture_object *texObj,
          break;
       }
       break;
-#endif
    }
 
    if ((current->hwTexBlendColor0 != prev->hwTexBlendColor0) ||
@@ -173,6 +167,7 @@ sis_set_texture_env1( GLcontext *ctx, struct gl_texture_object *texObj,
    int unit)
 {
    sisContextPtr smesa = SIS_CONTEXT(ctx);
+   GLubyte c[4];
 
    __GLSiSHardware *prev = &smesa->prev;
    __GLSiSHardware *current = &smesa->current;
@@ -184,7 +179,6 @@ sis_set_texture_env1( GLcontext *ctx, struct gl_texture_object *texObj,
    switch (texture_unit->EnvMode)
    {
    case GL_REPLACE:
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV1, 0);
       switch (t->format)
       {
       case GL_ALPHA:
@@ -206,7 +200,6 @@ sis_set_texture_env1( GLcontext *ctx, struct gl_texture_object *texObj,
       break;
 
    case GL_MODULATE:
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV1, 0);
       switch (t->format)
       {
       case GL_ALPHA:
@@ -228,7 +221,6 @@ sis_set_texture_env1( GLcontext *ctx, struct gl_texture_object *texObj,
       break;
 
    case GL_DECAL:
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV1, 0);
       switch (t->format)
       {
       case GL_RGB:
@@ -243,13 +235,11 @@ sis_set_texture_env1( GLcontext *ctx, struct gl_texture_object *texObj,
       break;
 
    case GL_BLEND:
-      FALLBACK(smesa, SIS_FALLBACK_TEXENV1, 1);
-#if 0 /* XXX Blending broken */
-      current->hwTexEnvColor =
-         ((GLint) (texture_unit->EnvColor[3])) << 24 |
-         ((GLint) (texture_unit->EnvColor[0])) << 16 |
-         ((GLint) (texture_unit->EnvColor[1])) << 8 |
-         ((GLint) (texture_unit->EnvColor[2]));
+      UNCLAMPED_FLOAT_TO_RGBA_CHAN(c, texture_unit->EnvColor);
+      current->hwTexEnvColor = ((GLint) (c[3])) << 24 |
+			       ((GLint) (c[0])) << 16 |
+			       ((GLint) (c[1])) << 8 |
+			       ((GLint) (c[2]));
       switch (t->format)
       {
       case GL_ALPHA:
@@ -272,7 +262,6 @@ sis_set_texture_env1( GLcontext *ctx, struct gl_texture_object *texObj,
          break;
       }
       break;
-#endif
    }
 
    if ((current->hwTexBlendColor1 != prev->hwTexBlendColor1) ||
diff --git a/src/mesa/drivers/dri/sis/sis_tris.c b/src/mesa/drivers/dri/sis/sis_tris.c
index 1c6d85a..de91268 100644
--- a/src/mesa/drivers/dri/sis/sis_tris.c
+++ b/src/mesa/drivers/dri/sis/sis_tris.c
@@ -966,8 +966,8 @@ static const char * const fallbackStrings[] = {
    "Texture mode",
    "Texture 0 mode",
    "Texture 1 mode",
-   "Texture 0 env",
-   "Texture 1 env",
+   "Texture 0 env",	/* Note: unused */
+   "Texture 1 env",	/* Note: unused */
    "glDrawBuffer(GL_FRONT_AND_BACK)",
    "glEnable(GL_STENCIL) without hw stencil buffer",
    "no_rast",
-- 
2.7.4