From cac5974bf9385f8c9bd46f9c90bfa8144f0c33d6 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Thu, 21 Sep 2006 10:20:15 +0000
Subject: [PATCH] Do a better job of choosing texture formats to avoid image
 conversions.

---
 src/mesa/drivers/dri/i965/brw_tex.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_tex.c b/src/mesa/drivers/dri/i965/brw_tex.c
index 47bd875bb06..8332d869e1d 100644
--- a/src/mesa/drivers/dri/i965/brw_tex.c
+++ b/src/mesa/drivers/dri/i965/brw_tex.c
@@ -49,12 +49,23 @@
 
 static const struct gl_texture_format *
 brwChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
-			 GLenum format, GLenum type )
+			 GLenum srcFormat, GLenum srcType )
 {
    switch ( internalFormat ) {
    case 4:
    case GL_RGBA:
    case GL_COMPRESSED_RGBA:
+      if (srcFormat == GL_BGRA && srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV)
+	 return &_mesa_texformat_argb4444;
+      else if (srcFormat == GL_BGRA && srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV)
+	 return &_mesa_texformat_argb1555;
+      else if ((srcFormat == GL_RGBA && srcType == GL_UNSIGNED_INT_8_8_8_8_REV) ||
+	       (srcFormat == GL_RGBA && srcType == GL_UNSIGNED_BYTE) ||
+	       (srcFormat == GL_ABGR_EXT && srcType == GL_UNSIGNED_INT_8_8_8_8)) 
+	 return &_mesa_texformat_rgba8888_rev;
+      else
+	 return &_mesa_texformat_argb8888;
+
    case GL_RGBA8:
    case GL_RGB10_A2:
    case GL_RGBA12:
@@ -73,8 +84,8 @@ brwChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
    case 3:
    case GL_COMPRESSED_RGB:
    case GL_RGB:
-      if (format == GL_RGB &&
-	  type == GL_UNSIGNED_SHORT_5_6_5)
+      if (srcFormat == GL_RGB &&
+	  srcType == GL_UNSIGNED_SHORT_5_6_5)
 	 return &_mesa_texformat_rgb565;
       else
 	 return &_mesa_texformat_argb8888;
@@ -127,8 +138,8 @@ brwChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
       return &_mesa_texformat_i8;
 
    case GL_YCBCR_MESA:
-      if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
-	  type == GL_UNSIGNED_BYTE)
+      if (srcType == GL_UNSIGNED_SHORT_8_8_MESA ||
+	  srcType == GL_UNSIGNED_BYTE)
          return &_mesa_texformat_ycbcr;
       else
          return &_mesa_texformat_ycbcr_rev;
-- 
2.30.2