diff options
author | Brian Paul <brianp@vmware.com> | 2009-07-29 20:07:41 -0600 |
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committer | Brian Paul <brianp@vmware.com> | 2009-07-29 20:07:41 -0600 |
commit | 9d0b8d72d8d704ff4d8e10448b60cbb42f07eecb (patch) | |
tree | 86b13d3647665a05cd3b3237abee8565e25da5b5 /src/mesa/drivers/dri/i965 | |
parent | 0723cd1b0a8a76808844a2216d709f56fbad88e2 (diff) |
mesa: add new FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC fragment program inputs
Previously, the FOGC attribute contained the fragment fog coord, front/back-
face flag and the gl_PointCoord.xy values. Now each of those things are
separate fragment program attributes. This simplifies quite a few things in
Mesa and gallium.
Need to test i965 driver and fix up point coord handling in the gallium/draw
module...
Diffstat (limited to 'src/mesa/drivers/dri/i965')
-rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_fp.c | 61 |
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 b9e8dd2e96..606baab967 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_fp.c +++ b/src/mesa/drivers/dri/i965/brw_wm_fp.c @@ -376,14 +376,6 @@ 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, @@ -393,26 +385,40 @@ 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), @@ -425,6 +431,7 @@ static void emit_interp( struct brw_wm_compile *c, src_undef(), src_undef()); break; + default: emit_op(c, WM_PINTERP, |