From e6df80184b0c7e83eba382b3161ba11db497c55d Mon Sep 17 00:00:00 2001
From: Ian Romanick <ian.d.romanick@intel.com>
Date: Wed, 24 Feb 2010 15:22:56 -0800
Subject: [PATCH] swrast: Remove support for rendering lines into a color-index
 buffer

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
---
 src/mesa/swrast/s_lines.c    | 48 ++++--------------------------------
 src/mesa/swrast/s_linetemp.h | 18 --------------
 2 files changed, 5 insertions(+), 61 deletions(-)

diff --git a/src/mesa/swrast/s_lines.c b/src/mesa/swrast/s_lines.c
index cff36042cbb..7db5af4ae1c 100644
--- a/src/mesa/swrast/s_lines.c
+++ b/src/mesa/swrast/s_lines.c
@@ -87,10 +87,7 @@ draw_wide_line( GLcontext *ctx, SWspan *span, GLboolean xMajor )
             for (i = 0; i < span->end; i++)
                y[i]++;
          }
-         if (ctx->Visual.rgbMode)
-            _swrast_write_rgba_span(ctx, span);
-         else
-            _swrast_write_index_span(ctx, span);
+	 _swrast_write_rgba_span(ctx, span);
       }
    }
    else {
@@ -106,10 +103,7 @@ draw_wide_line( GLcontext *ctx, SWspan *span, GLboolean xMajor )
             for (i = 0; i < span->end; i++)
                x[i]++;
          }
-         if (ctx->Visual.rgbMode)
-            _swrast_write_rgba_span(ctx, span);
-         else
-            _swrast_write_index_span(ctx, span);
+	 _swrast_write_rgba_span(ctx, span);
       }
    }
 }
@@ -120,12 +114,6 @@ draw_wide_line( GLcontext *ctx, SWspan *span, GLboolean xMajor )
 /*****                    Rasterization                           *****/
 /**********************************************************************/
 
-/* Simple color index line (no stipple, width=1, no Z, no fog, no tex)*/
-#define NAME simple_no_z_ci_line
-#define INTERP_INDEX
-#define RENDER_SPAN(span) _swrast_write_index_span(ctx, &span)
-#include "s_linetemp.h"
-
 /* Simple RGBA index line (no stipple, width=1, no Z, no fog, no tex)*/
 #define NAME simple_no_z_rgba_line
 #define INTERP_RGBA
@@ -133,25 +121,6 @@ draw_wide_line( GLcontext *ctx, SWspan *span, GLboolean xMajor )
 #include "s_linetemp.h"
 
 
-/* Z, fog, wide, stipple color index line */
-#define NAME ci_line
-#define INTERP_INDEX
-#define INTERP_Z
-#define INTERP_ATTRIBS /* for fog */
-#define RENDER_SPAN(span)					\
-   if (ctx->Line.StippleFlag) {					\
-      span.arrayMask |= SPAN_MASK;				\
-      compute_stipple_mask(ctx, span.end, span.array->mask);    \
-   }								\
-   if (ctx->Line.Width > 1.0) {					\
-      draw_wide_line(ctx, &span, (GLboolean)(dx > dy));		\
-   }								\
-   else {							\
-      _swrast_write_index_span(ctx, &span);			\
-   }
-#include "s_linetemp.h"
-
-
 /* Z, fog, wide, stipple RGBA line */
 #define NAME rgba_line
 #define INTERP_RGBA
@@ -256,7 +225,6 @@ void
 _swrast_choose_line( GLcontext *ctx )
 {
    SWcontext *swrast = SWRAST_CONTEXT(ctx);
-   const GLboolean rgbmode = ctx->Visual.rgbMode;
    GLboolean specular = (ctx->Fog.ColorSumEnabled ||
                          (ctx->Light.Enabled &&
                           ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR));
@@ -277,23 +245,17 @@ _swrast_choose_line( GLcontext *ctx )
                || ctx->Line.Width != 1.0
                || ctx->Line.StippleFlag) {
          /* no texture, but Z, fog, width>1, stipple, etc. */
-         if (rgbmode)
 #if CHAN_BITS == 32
-            USE(general_line);
+         USE(general_line);
 #else
-            USE(rgba_line);
+         USE(rgba_line);
 #endif
-         else
-            USE(ci_line);
       }
       else {
          ASSERT(!ctx->Depth.Test);
          ASSERT(ctx->Line.Width == 1.0);
          /* simple lines */
-         if (rgbmode)
-            USE(simple_no_z_rgba_line);
-         else
-            USE(simple_no_z_ci_line);
+         USE(simple_no_z_rgba_line);
       }
    }
    else if (ctx->RenderMode == GL_FEEDBACK) {
diff --git a/src/mesa/swrast/s_linetemp.h b/src/mesa/swrast/s_linetemp.h
index 1abf8d6c7f3..182f962e1eb 100644
--- a/src/mesa/swrast/s_linetemp.h
+++ b/src/mesa/swrast/s_linetemp.h
@@ -31,8 +31,6 @@
  * The following macros may be defined to indicate what auxillary information
  * must be interplated along the line:
  *    INTERP_Z        - if defined, interpolate Z values
- *    INTERP_RGBA     - if defined, interpolate RGBA values
- *    INTERP_INDEX    - if defined, interpolate color index values
  *    INTERP_ATTRIBS  - if defined, interpolate attribs (texcoords, varying, etc)
  *
  * When one can directly address pixels in the color buffer the following
@@ -223,7 +221,6 @@ NAME( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 )
    /*
     * Span setup: compute start and step values for all interpolated values.
     */
-#ifdef INTERP_RGBA
    interpFlags |= SPAN_RGBA;
    if (ctx->Light.ShadeModel == GL_SMOOTH) {
       span.red   = ChanToFixed(vert0->color[0]);
@@ -245,19 +242,6 @@ NAME( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 )
       span.blueStep  = 0;
       span.alphaStep = 0;
    }
-#endif
-#ifdef INTERP_INDEX
-   interpFlags |= SPAN_INDEX;
-   if (ctx->Light.ShadeModel == GL_SMOOTH) {
-      span.index = FloatToFixed(vert0->attrib[FRAG_ATTRIB_CI][0]);
-      span.indexStep = FloatToFixed(  vert1->attrib[FRAG_ATTRIB_CI][0]
-                                    - vert0->attrib[FRAG_ATTRIB_CI][0]) / numPixels;
-   }
-   else {
-      span.index = FloatToFixed(vert1->attrib[FRAG_ATTRIB_CI][0]);
-      span.indexStep = 0;
-   }
-#endif
 #if defined(INTERP_Z) || defined(DEPTH_TYPE)
    interpFlags |= SPAN_Z;
    {
@@ -407,9 +391,7 @@ NAME( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 )
 
 #undef NAME
 #undef INTERP_Z
-#undef INTERP_RGBA
 #undef INTERP_ATTRIBS
-#undef INTERP_INDEX
 #undef PIXEL_ADDRESS
 #undef PIXEL_TYPE
 #undef DEPTH_TYPE
-- 
2.30.2