From e38114a5e4492684333251eb22bc60ee1038de55 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Wed, 20 Sep 2006 14:54:49 +0000
Subject: [PATCH] Support ARB_texture_rectangle.

---
 src/mesa/drivers/dri/i965/brw_tex.c        |  4 ++-
 src/mesa/drivers/dri/i965/brw_tex_layout.c |  7 +++--
 src/mesa/drivers/dri/i965/brw_util.c       |  2 ++
 src/mesa/drivers/dri/i965/brw_wm_fp.c      | 36 +++++++++++++++++++++-
 src/mesa/drivers/dri/i965/intel_context.c  |  4 +++
 5 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_tex.c b/src/mesa/drivers/dri/i965/brw_tex.c
index d70b2ea87a5..78d351407de 100644
--- a/src/mesa/drivers/dri/i965/brw_tex.c
+++ b/src/mesa/drivers/dri/i965/brw_tex.c
@@ -75,7 +75,9 @@ brwChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
    case GL_RGB5:
    case GL_RGB4:
    case GL_R3_G3_B2:
-/*       return &_mesa_texformat_rgb888; */
+      /* Broadwater doesn't support RGB textures, so these must be
+       * stored as ARGB.
+       */
       return &_mesa_texformat_argb8888;
 
    case GL_ALPHA:
diff --git a/src/mesa/drivers/dri/i965/brw_tex_layout.c b/src/mesa/drivers/dri/i965/brw_tex_layout.c
index f8aa068241b..1353325afff 100644
--- a/src/mesa/drivers/dri/i965/brw_tex_layout.c
+++ b/src/mesa/drivers/dri/i965/brw_tex_layout.c
@@ -138,13 +138,16 @@ GLboolean brw_miptree_layout( struct intel_mipmap_tree *mt )
 	 
 	 /* Layout_below: step right after second mipmap.
 	  */
-	 if (level == mt->first_level + 1) 
+	 if (level == mt->first_level + 1) {
 	    x += mt->pitch / 2;
+	    x = (x + 3) & ~ 3;
+	 }
 	 else {
 	    y += img_height;
+	    y += align_h - 1;
+	    y &= ~(align_h - 1);
 	 }
 
-
 	 width  = minify(width);
 	 height = minify(height);
       }
diff --git a/src/mesa/drivers/dri/i965/brw_util.c b/src/mesa/drivers/dri/i965/brw_util.c
index 5957b717218..9d12c26486d 100644
--- a/src/mesa/drivers/dri/i965/brw_util.c
+++ b/src/mesa/drivers/dri/i965/brw_util.c
@@ -98,6 +98,8 @@ static GLuint brw_parameter_state_flags(const enum state_index state[])
       switch (state[1]) {
       case STATE_NORMAL_SCALE:
 	 return _NEW_MODELVIEW;
+      case STATE_TEXRECT_SCALE:
+	 return _NEW_TEXTURE;
       default:
 	 assert(0);
 	 return 0;
diff --git a/src/mesa/drivers/dri/i965/brw_wm_fp.c b/src/mesa/drivers/dri/i965/brw_wm_fp.c
index 2f596848663..8bf55790bfa 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_fp.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_fp.c
@@ -520,6 +520,35 @@ static void precalc_lit( struct brw_wm_compile *c,
 static void precalc_tex( struct brw_wm_compile *c,
 			 const struct prog_instruction *inst )
 {
+   struct prog_src_register coord;
+   struct prog_dst_register tmpcoord;
+
+   if (inst->TexSrcTarget == TEXTURE_RECT_INDEX) {
+      struct prog_src_register scale = 
+	 search_or_add_param6( c, 
+			       STATE_INTERNAL, 
+			       STATE_TEXRECT_SCALE,
+			       inst->TexSrcUnit,
+			       0,0,0 );
+
+      tmpcoord = get_temp(c);
+
+      /* coord.xy   = MUL inst->SrcReg[0], { 1/width, 1/height }
+       */
+      emit_op(c,
+	      OPCODE_MUL,
+	      tmpcoord,
+	      0, 0, 0,
+	      inst->SrcReg[0],
+	      scale,
+	      src_undef());
+
+      coord = src_reg_from_dst(tmpcoord);
+   }
+   else {
+      coord = inst->SrcReg[0];
+   }
+
    /* Need to emit YUV texture conversions by hand.  Probably need to
     * do this here - the alternative is in brw_wm_emit.c, but the
     * conversion requires allocating a temporary variable which we
@@ -532,7 +561,7 @@ static void precalc_tex( struct brw_wm_compile *c,
 	      inst->SaturateMode,
 	      inst->TexSrcUnit,
 	      inst->TexSrcTarget,
-	      inst->SrcReg[0],
+	      coord,
 	      src_undef(),
 	      src_undef());
    }
@@ -604,7 +633,12 @@ static void precalc_tex( struct brw_wm_compile *c,
 	      src_swizzle1(tmpsrc, Z),
 	      src_swizzle1(C1, W),
 	      src_swizzle1(src_reg_from_dst(dst), Y));
+
+      release_temp(c, tmp);
    }
+
+   if (inst->TexSrcTarget == GL_TEXTURE_RECTANGLE_NV) 
+      release_temp(c, tmpcoord);
 }
 
 
diff --git a/src/mesa/drivers/dri/i965/intel_context.c b/src/mesa/drivers/dri/i965/intel_context.c
index 47c8510ad39..c8ba26c425f 100644
--- a/src/mesa/drivers/dri/i965/intel_context.c
+++ b/src/mesa/drivers/dri/i965/intel_context.c
@@ -149,6 +149,10 @@ const struct dri_extension card_extensions[] =
     { "GL_ARB_texture_env_combine",        NULL },
     { "GL_ARB_texture_env_dot3",           NULL },
     { "GL_ARB_texture_mirrored_repeat",    NULL },
+    { "GL_ARB_texture_non_power_of_two",   NULL },
+    { "GL_ARB_texture_rectangle",          NULL },
+    { "GL_NV_texture_rectangle",           NULL },
+    { "GL_EXT_texture_rectangle",          NULL },
     { "GL_ARB_texture_rectangle",          NULL },
     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
-- 
2.30.2