Mesa (master): i915: Add support for varying inputs.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: f9f31b25740887373806cb489e5480dc9b261805
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f9f31b25740887373806cb489e5480dc9b261805

Author: Eric Anholt <eric at anholt.net>
Date:   Thu Oct  1 14:00:28 2009 -0700

i915: Add support for varying inputs.

---

 src/mesa/drivers/dri/i915/i915_context.c  |    2 +-
 src/mesa/drivers/dri/i915/i915_fragprog.c |   23 ++++++++++++++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i915/i915_context.c b/src/mesa/drivers/dri/i915/i915_context.c
index b342503..7d4c7cf 100644
--- a/src/mesa/drivers/dri/i915/i915_context.c
+++ b/src/mesa/drivers/dri/i915/i915_context.c
@@ -142,7 +142,7 @@ i915CreateContext(const __GLcontextModes * mesaVis,
    ctx->Const.MaxTextureUnits = I915_TEX_UNITS;
    ctx->Const.MaxTextureImageUnits = I915_TEX_UNITS;
    ctx->Const.MaxTextureCoordUnits = I915_TEX_UNITS;
-
+   ctx->Const.MaxVarying = I915_TEX_UNITS;
 
    /* Advertise the full hardware capabilities.  The new memory
     * manager should cope much better with overload situations:
diff --git a/src/mesa/drivers/dri/i915/i915_fragprog.c b/src/mesa/drivers/dri/i915/i915_fragprog.c
index 929a6eb..66db7e1 100644
--- a/src/mesa/drivers/dri/i915/i915_fragprog.c
+++ b/src/mesa/drivers/dri/i915/i915_fragprog.c
@@ -122,6 +122,19 @@ src_vector(struct i915_fragment_program *p,
          src = i915_emit_decl(p, REG_TYPE_T,
                               T_TEX0 + (source->Index - FRAG_ATTRIB_TEX0),
                               D0_CHANNEL_ALL);
+	 break;
+
+      case FRAG_ATTRIB_VAR0:
+      case FRAG_ATTRIB_VAR0 + 1:
+      case FRAG_ATTRIB_VAR0 + 2:
+      case FRAG_ATTRIB_VAR0 + 3:
+      case FRAG_ATTRIB_VAR0 + 4:
+      case FRAG_ATTRIB_VAR0 + 5:
+      case FRAG_ATTRIB_VAR0 + 6:
+      case FRAG_ATTRIB_VAR0 + 7:
+         src = i915_emit_decl(p, REG_TYPE_T,
+                              T_TEX0 + (source->Index - FRAG_ATTRIB_VAR0),
+                              D0_CHANNEL_ALL);
          break;
 
       default:
@@ -909,7 +922,7 @@ check_wpos(struct i915_fragment_program *p)
    p->wpos_tex = -1;
 
    for (i = 0; i < p->ctx->Const.MaxTextureCoordUnits; i++) {
-      if (inputs & FRAG_BIT_TEX(i))
+      if (inputs & (FRAG_BIT_TEX(i) | FRAG_BIT_VAR(i)))
          continue;
       else if (inputs & FRAG_BIT_WPOS) {
          p->wpos_tex = i;
@@ -1140,6 +1153,14 @@ i915ValidateFragmentProgram(struct i915_context *i915)
 
          EMIT_ATTR(_TNL_ATTRIB_TEX0 + i, EMIT_SZ(sz), 0, sz * 4);
       }
+      else if (inputsRead & FRAG_BIT_VAR(i)) {
+         int sz = VB->AttribPtr[_TNL_ATTRIB_GENERIC0 + i]->size;
+
+         s2 &= ~S2_TEXCOORD_FMT(i, S2_TEXCOORD_FMT0_MASK);
+         s2 |= S2_TEXCOORD_FMT(i, SZ_TO_HW(sz));
+
+         EMIT_ATTR(_TNL_ATTRIB_GENERIC0 + i, EMIT_SZ(sz), 0, sz * 4);
+      }
       else if (i == p->wpos_tex) {
 
          /* If WPOS is required, duplicate the XYZ position data in an