From 7676980d38cff417015bca8d23549d567d74228b Mon Sep 17 00:00:00 2001
From: Zou Nan hai <nanhai.zou@intel.com>
Date: Fri, 7 Mar 2008 15:11:28 +0800
Subject: [PATCH]   [i965] fix fd.o bug #11471 and #11478 	1. Follow
 EXT_texture_rectangle with YCbCr texture 	2. swap UV component for
 MESA_FORMAT_YCBCR

---
 src/mesa/drivers/dri/i965/brw_wm.c    |  8 ++++++--
 src/mesa/drivers/dri/i965/brw_wm.h    |  3 ++-
 src/mesa/drivers/dri/i965/brw_wm_fp.c | 20 +++++++++++++++-----
 3 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_wm.c b/src/mesa/drivers/dri/i965/brw_wm.c
index 342e7f8496b..47665692e3b 100644
--- a/src/mesa/drivers/dri/i965/brw_wm.c
+++ b/src/mesa/drivers/dri/i965/brw_wm.c
@@ -29,7 +29,7 @@
   *   Keith Whitwell <keith@tungstengraphics.com>
   */
              
-
+#include "main/texformat.h"
 #include "brw_context.h"
 #include "brw_util.h"
 #include "brw_wm.h"
@@ -288,8 +288,12 @@ static void brw_wm_populate_key( struct brw_context *brw,
 	    key->shadowtex_mask |= 1<<i;
 	 }
 
-	 if (t->Image[0][t->BaseLevel]->InternalFormat == GL_YCBCR_MESA)
+	 if (t->Image[0][t->BaseLevel]->InternalFormat == GL_YCBCR_MESA) {
 	    key->yuvtex_mask |= 1<<i;
+	    if (t->Image[0][t->BaseLevel]->TexFormat->MesaFormat == 
+		    MESA_FORMAT_YCBCR)
+		key->yuvtex_swap_mask |= 1<< i;
+	 }
       }
    }
 
diff --git a/src/mesa/drivers/dri/i965/brw_wm.h b/src/mesa/drivers/dri/i965/brw_wm.h
index 645286d4700..441fbd33fb4 100644
--- a/src/mesa/drivers/dri/i965/brw_wm.h
+++ b/src/mesa/drivers/dri/i965/brw_wm.h
@@ -69,7 +69,8 @@ struct brw_wm_prog_key {
    GLuint runtime_check_aads_emit:1;
    
    GLuint yuvtex_mask:8;
-   GLuint pad1:24;
+   GLuint yuvtex_swap_mask:8;	/* UV swaped */
+   GLuint pad1:16;
 
    GLuint program_string_id:32;
    GLuint origin_x, origin_y;
diff --git a/src/mesa/drivers/dri/i965/brw_wm_fp.c b/src/mesa/drivers/dri/i965/brw_wm_fp.c
index 55527373bcf..77cb3b27e3e 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_fp.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_fp.c
@@ -649,17 +649,21 @@ static void precalc_tex( struct brw_wm_compile *c,
 	      src_undef());
    }
    else {
+       GLboolean  swap_uv = c->key.yuvtex_swap_mask & (1<<inst->TexSrcUnit);
+
       /* 
 	 CONST C0 = { -.5, -.0625,  -.5, 1.164 }
 	 CONST C1 = { 1.596, -0.813, 2.018, -.391 }
 	 UYV     = TEX ...
 	 UYV.xyz = ADD UYV,     C0
 	 UYV.y   = MUL UYV.y,   C0.w
-	 RGB.xyz = MAD UYV.xxz, C1,   UYV.y
+ 	 if (UV swaped)
+	    RGB.xyz = MAD UYV.zzx, C1,   UYV.y
+	 else
+	    RGB.xyz = MAD UYV.xxz, C1,   UYV.y 
 	 RGB.y   = MAD UYV.z,   C1.w, RGB.y
       */
       struct prog_dst_register dst = inst->DstReg;
-      struct prog_src_register src0 = inst->SrcReg[0];
       struct prog_dst_register tmp = get_temp(c);
       struct prog_src_register tmpsrc = src_reg_from_dst(tmp);
       struct prog_src_register C0 = search_or_add_const4f( c,  -.5, -.0625, -.5, 1.164 );
@@ -673,7 +677,7 @@ static void precalc_tex( struct brw_wm_compile *c,
 	      inst->SaturateMode,
 	      inst->TexSrcUnit,
 	      inst->TexSrcTarget,
-	      src0,
+	      coord,
 	      src_undef(),
 	      src_undef());
 
@@ -689,6 +693,7 @@ static void precalc_tex( struct brw_wm_compile *c,
 
       /* YUV.y   = MUL YUV.y, C0.w
        */
+
       emit_op(c,
 	      OPCODE_MUL,
 	      dst_mask(tmp, WRITEMASK_Y),
@@ -697,13 +702,18 @@ static void precalc_tex( struct brw_wm_compile *c,
 	      src_swizzle1(C0, W),
 	      src_undef());
 
-      /* RGB.xyz = MAD YUV.xxz, C1, YUV.y
+      /* 
+       * if (UV swaped)
+       *     RGB.xyz = MAD YUV.zzx, C1, YUV.y
+       * else
+       *     RGB.xyz = MAD YUV.xxz, C1, YUV.y
        */
+
       emit_op(c,
 	      OPCODE_MAD,
 	      dst_mask(dst, WRITEMASK_XYZ),
 	      0, 0, 0,
-	      src_swizzle(tmpsrc, X,X,Z,Z),
+	      swap_uv?src_swizzle(tmpsrc, Z,Z,X,X):src_swizzle(tmpsrc, X,X,Z,Z),
 	      C1,
 	      src_swizzle1(tmpsrc, Y));
 
-- 
2.30.2