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authorBrian Paul <brianp@vmware.com>2009-08-12 20:32:41 -0600
committerBrian Paul <brianp@vmware.com>2009-08-12 20:32:41 -0600
commitf3b215cba2bca92d6582cc0c34702b73289f909c (patch)
treeb7a534f0adae00b68641b005c0db81227cf5aa8e /src/mesa/drivers/dri
parentfdfb0d4b0e04bff2f3dbae2d1f8e3765fb4b0dce (diff)
parentf7618f4f37d42461b1a6feaa392935d1ae703873 (diff)
Merge branch 'new-frag-attribs'
This branch introduces new FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC fragment program inputs for GLSL gl_FrontFacing and gl_PointCoord. Before, these attributes were packed with the FOG attribute. That made things complicated elsewhere.
Diffstat (limited to 'src/mesa/drivers/dri')
-rw-r--r--src/mesa/drivers/dri/i965/brw_wm_fp.c61
1 files changed, 34 insertions, 27 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_fp.c b/src/mesa/drivers/dri/i965/brw_wm_fp.c
index 0eac1bf86a..5dc076a825 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_fp.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_fp.c
@@ -409,14 +409,6 @@ static void emit_interp( struct brw_wm_compile *c,
}
break;
case FRAG_ATTRIB_FOGC:
- /* The FOGC input is really special. When a program uses glFogFragCoord,
- * the results returned are supposed to be (f,0,0,1). But for Mesa GLSL,
- * the glFrontFacing and glPointCoord values are also stashed in FOGC.
- * So, write the interpolated fog value to X, then either 0, 1, or the
- * stashed values to Y, Z, W. Note that this means that
- * glFogFragCoord.yzw can be wrong in those cases!
- */
-
/* Interpolate the fog coordinate */
emit_op(c,
WM_PINTERP,
@@ -426,26 +418,40 @@ static void emit_interp( struct brw_wm_compile *c,
deltas,
get_pixel_w(c));
- /* Move the front facing value into FOGC.y if it's needed. */
- if (c->fp->program.UsesFrontFacing) {
- emit_op(c,
- WM_FRONTFACING,
- dst_mask(dst, WRITEMASK_Y),
- 0,
- src_undef(),
- src_undef(),
- src_undef());
- } else {
- emit_op(c,
- OPCODE_MOV,
- dst_mask(dst, WRITEMASK_Y),
- 0,
- src_swizzle1(interp, SWIZZLE_ZERO),
- src_undef(),
- src_undef());
- }
+ emit_op(c,
+ OPCODE_MOV,
+ dst_mask(dst, WRITEMASK_YZW),
+ 0,
+ src_swizzle(interp,
+ SWIZZLE_ZERO,
+ SWIZZLE_ZERO,
+ SWIZZLE_ZERO,
+ SWIZZLE_ONE),
+ src_undef(),
+ src_undef());
+ break;
+
+ case FRAG_ATTRIB_FACE:
+ /* XXX review/test this case */
+ emit_op(c,
+ WM_FRONTFACING,
+ dst_mask(dst, WRITEMASK_X),
+ 0,
+ src_undef(),
+ src_undef(),
+ src_undef());
+ break;
+
+ case FRAG_ATTRIB_PNTC:
+ /* XXX review/test this case */
+ emit_op(c,
+ WM_PINTERP,
+ dst_mask(dst, WRITEMASK_XY),
+ 0,
+ interp,
+ deltas,
+ get_pixel_w(c));
- /* Should do the PointCoord thing here. */
emit_op(c,
OPCODE_MOV,
dst_mask(dst, WRITEMASK_ZW),
@@ -458,6 +464,7 @@ static void emit_interp( struct brw_wm_compile *c,
src_undef(),
src_undef());
break;
+
default:
emit_op(c,
WM_PINTERP,