swrast: Remove _swrast_write_index_span and associated code

After all the recent color-index rendering removal,
_swrast_write_index_span is no longer used anywhere.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>

diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c
index dd67f63..f1f37df 100644 (file)
--- a/src/mesa/swrast/s_span.c
+++ b/src/mesa/swrast/s_span.c
@@ -367,38 +367,6 @@ interpolate_float_colors(SWspan *span)
 
 
 
-/* Fill in the span.color.index array from the interpolation values */
-static INLINE void
-interpolate_indexes(GLcontext *ctx, SWspan *span)
-{
-   GLfixed index = span->index;
-   const GLint indexStep = span->indexStep;
-   const GLuint n = span->end;
-   GLuint *indexes = span->array->index;
-   GLuint i;
-   (void) ctx;
-
-   ASSERT(!(span->arrayMask & SPAN_INDEX));
-
-   if ((span->interpMask & SPAN_FLAT) || (indexStep == 0)) {
-      /* constant color */
-      index = FixedToInt(index);
-      for (i = 0; i < n; i++) {
-         indexes[i] = index;
-      }
-   }
-   else {
-      /* interpolate */
-      for (i = 0; i < n; i++) {
-         indexes[i] = FixedToInt(index);
-         index += indexStep;
-      }
-   }
-   span->arrayMask |= SPAN_INDEX;
-   span->interpMask &= ~SPAN_INDEX;
-}
-
-
 /**
  * Fill in the span.zArray array from the span->z, zStep values.
  */
@@ -835,249 +803,6 @@ clip_span( GLcontext *ctx, SWspan *span )
 
 
 /**
- * Apply all the per-fragment opertions to a span of color index fragments
- * and write them to the enabled color drawbuffers.
- * The 'span' parameter can be considered to be const.  Note that
- * span->interpMask and span->arrayMask may be changed but will be restored
- * to their original values before returning.
- */
-void
-_swrast_write_index_span( GLcontext *ctx, SWspan *span)
-{
-   const SWcontext *swrast = SWRAST_CONTEXT(ctx);
-   const GLbitfield origInterpMask = span->interpMask;
-   const GLbitfield origArrayMask = span->arrayMask;
-   struct gl_framebuffer *fb = ctx->DrawBuffer;
-
-   ASSERT(span->end <= MAX_WIDTH);
-   ASSERT(span->primitive == GL_POINT  ||  span->primitive == GL_LINE ||
-         span->primitive == GL_POLYGON  ||  span->primitive == GL_BITMAP);
-   ASSERT((span->interpMask | span->arrayMask) & SPAN_INDEX);
-   /*
-   ASSERT((span->interpMask & span->arrayMask) == 0);
-   */
-
-   if (span->arrayMask & SPAN_MASK) {
-      /* mask was initialized by caller, probably glBitmap */
-      span->writeAll = GL_FALSE;
-   }
-   else {
-      memset(span->array->mask, 1, span->end);
-      span->writeAll = GL_TRUE;
-   }
-
-   /* Clipping */
-   if ((swrast->_RasterMask & CLIP_BIT) || (span->primitive != GL_POLYGON)) {
-      if (!clip_span(ctx, span)) {
-         return;
-      }
-   }
-
-   if (!(span->arrayMask & SPAN_MASK)) {
-      /* post-clip sanity check */
-      assert(span->x >= 0);
-      assert(span->y >= 0);
-   }
-
-   /* Depth bounds test */
-   if (ctx->Depth.BoundsTest && fb->Visual.depthBits > 0) {
-      if (!_swrast_depth_bounds_test(ctx, span)) {
-         return;
-      }
-   }
-
-#ifdef DEBUG
-   /* Make sure all fragments are within window bounds */
-   if (span->arrayMask & SPAN_XY) {
-      GLuint i;
-      for (i = 0; i < span->end; i++) {
-         if (span->array->mask[i]) {
-            assert(span->array->x[i] >= fb->_Xmin);
-            assert(span->array->x[i] < fb->_Xmax);
-            assert(span->array->y[i] >= fb->_Ymin);
-            assert(span->array->y[i] < fb->_Ymax);
-         }
-      }
-   }
-#endif
-
-   /* Polygon Stippling */
-   if (ctx->Polygon.StippleFlag && span->primitive == GL_POLYGON) {
-      stipple_polygon_span(ctx, span);
-   }
-
-   /* Stencil and Z testing */
-   if (ctx->Stencil._Enabled || ctx->Depth.Test) {
-      if (!(span->arrayMask & SPAN_Z))
-         _swrast_span_interpolate_z(ctx, span);
-
-      if (ctx->Transform.DepthClamp)
-        _swrast_depth_clamp_span(ctx, span);
-
-      if (ctx->Stencil._Enabled) {
-         if (!_swrast_stencil_and_ztest_span(ctx, span)) {
-            span->arrayMask = origArrayMask;
-            return;
-         }
-      }
-      else {
-         ASSERT(ctx->Depth.Test);
-         if (!_swrast_depth_test_span(ctx, span)) {
-            span->interpMask = origInterpMask;
-            span->arrayMask = origArrayMask;
-            return;
-         }
-      }
-   }
-
-   if (ctx->Query.CurrentOcclusionObject) {
-      /* update count of 'passed' fragments */
-      struct gl_query_object *q = ctx->Query.CurrentOcclusionObject;
-      GLuint i;
-      for (i = 0; i < span->end; i++)
-         q->Result += span->array->mask[i];
-   }
-
-   /* we have to wait until after occlusion to do this test */
-   if (ctx->Color.IndexMask == 0) {
-      /* write no pixels */
-      span->arrayMask = origArrayMask;
-      return;
-   }
-
-   /* Interpolate the color indexes if needed */
-   if (swrast->_FogEnabled ||
-       ctx->Color.IndexLogicOpEnabled ||
-       ctx->Color.IndexMask != 0xffffffff ||
-       (span->arrayMask & SPAN_COVERAGE)) {
-      if (!(span->arrayMask & SPAN_INDEX) /*span->interpMask & SPAN_INDEX*/) {
-         interpolate_indexes(ctx, span);
-      }
-   }
-
-   /* Fog */
-   if (swrast->_FogEnabled) {
-      _swrast_fog_ci_span(ctx, span);
-   }
-
-   /* Antialias coverage application */
-   if (span->arrayMask & SPAN_COVERAGE) {
-      const GLfloat *coverage = span->array->coverage;
-      GLuint *index = span->array->index;
-      GLuint i;
-      for (i = 0; i < span->end; i++) {
-         ASSERT(coverage[i] < 16);
-         index[i] = (index[i] & ~0xf) | ((GLuint) coverage[i]);
-      }
-   }
-
-   /*
-    * Write to renderbuffers
-    */
-   {
-      const GLuint numBuffers = fb->_NumColorDrawBuffers;
-      GLuint buf;
-
-      for (buf = 0; buf < numBuffers; buf++) {
-         struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buf];
-         GLuint indexSave[MAX_WIDTH];
-
-         ASSERT(rb->_BaseFormat == GL_COLOR_INDEX);
-
-         if (numBuffers > 1) {
-            /* save indexes for second, third renderbuffer writes */
-            memcpy(indexSave, span->array->index,
-                   span->end * sizeof(indexSave[0]));
-         }
-
-         if (ctx->Color.IndexLogicOpEnabled) {
-            _swrast_logicop_ci_span(ctx, rb, span);
-         }
-
-         if (ctx->Color.IndexMask != 0xffffffff) {
-            _swrast_mask_ci_span(ctx, rb, span);
-         }
-
-         if (!(span->arrayMask & SPAN_INDEX) && span->indexStep == 0) {
-            /* all fragments have same color index */
-            GLubyte index8;
-            GLushort index16;
-            GLuint index32;
-            void *value;
-
-            if (rb->DataType == GL_UNSIGNED_BYTE) {
-               index8 = FixedToInt(span->index);
-               value = &index8;
-            }
-            else if (rb->DataType == GL_UNSIGNED_SHORT) {
-               index16 = FixedToInt(span->index);
-               value = &index16;
-            }
-            else {
-               ASSERT(rb->DataType == GL_UNSIGNED_INT);
-               index32 = FixedToInt(span->index);
-               value = &index32;
-            }
-
-            if (span->arrayMask & SPAN_XY) {
-               rb->PutMonoValues(ctx, rb, span->end, span->array->x, 
-                                 span->array->y, value, span->array->mask);
-            }
-            else {
-               rb->PutMonoRow(ctx, rb, span->end, span->x, span->y,
-                              value, span->array->mask);
-            }
-         }
-         else {
-            /* each fragment is a different color */
-            GLubyte index8[MAX_WIDTH];
-            GLushort index16[MAX_WIDTH];
-            void *values;
-
-            if (rb->DataType == GL_UNSIGNED_BYTE) {
-               GLuint k;
-               for (k = 0; k < span->end; k++) {
-                  index8[k] = (GLubyte) span->array->index[k];
-               }
-               values = index8;
-            }
-            else if (rb->DataType == GL_UNSIGNED_SHORT) {
-               GLuint k;
-               for (k = 0; k < span->end; k++) {
-                  index16[k] = (GLushort) span->array->index[k];
-               }
-               values = index16;
-            }
-            else {
-               ASSERT(rb->DataType == GL_UNSIGNED_INT);
-               values = span->array->index;
-            }
-
-            if (span->arrayMask & SPAN_XY) {
-               rb->PutValues(ctx, rb, span->end,
-                             span->array->x, span->array->y,
-                             values, span->array->mask);
-            }
-            else {
-               rb->PutRow(ctx, rb, span->end, span->x, span->y,
-                          values, span->array->mask);
-            }
-         }
-
-         if (buf + 1 < numBuffers) {
-            /* restore original span values */
-            memcpy(span->array->index, indexSave,
-                   span->end * sizeof(indexSave[0]));
-         }
-      } /* for buf */
-   }
-
-   span->interpMask = origInterpMask;
-   span->arrayMask = origArrayMask;
-}
-
-
-/**
  * Add specular colors to primary colors.
  * Only called during fixed-function operation.
  * Result is float color array (FRAG_ATTRIB_COL0).

diff --git a/src/mesa/swrast/s_span.h b/src/mesa/swrast/s_span.h
index 0eabae2..9f6be5a 100644 (file)
--- a/src/mesa/swrast/s_span.h
+++ b/src/mesa/swrast/s_span.h
@@ -187,9 +187,6 @@ _swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
                        GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
                        GLfloat s, GLfloat t, GLfloat q, GLfloat invQ);
 
-extern void
-_swrast_write_index_span( GLcontext *ctx, SWspan *span);
-
 
 extern void
 _swrast_write_rgba_span( GLcontext *ctx, SWspan *span);