X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fswrast%2Fs_fog.c;h=ea59de1602007515d1c46da98df88967e3308b6e;hb=2b0aa3fb21386051976bf3c45e6455fc45d69bb3;hp=b9ba265db6d45f92f7679578d6c1d6a512f291b7;hpb=101d1a658a614d1e2ec02b1e697f6161291af653;p=mesa.git

diff --git a/src/mesa/swrast/s_fog.c b/src/mesa/swrast/s_fog.c
index b9ba265db6d..ea59de16020 100644
--- a/src/mesa/swrast/s_fog.c
+++ b/src/mesa/swrast/s_fog.c
@@ -25,7 +25,6 @@
 
 #include "main/glheader.h"
 #include "main/colormac.h"
-#include "main/context.h"
 #include "main/macros.h"
 
 #include "s_context.h"
@@ -36,7 +35,7 @@
  * Used to convert current raster distance to a fog factor in [0,1].
  */
 GLfloat
-_swrast_z_to_fogfactor(GLcontext *ctx, GLfloat z)
+_swrast_z_to_fogfactor(struct gl_context *ctx, GLfloat z)
 {
    GLfloat d, f;
 
@@ -122,38 +121,6 @@ else {										\
    }										\
 }
 
-/* As above, but CI mode (XXX try to merge someday) */
-#define FOG_LOOP_CI(FOG_FUNC)							\
-if (span->arrayAttribs & FRAG_BIT_FOGC) {					\
-   GLuint i;									\
-   for (i = 0; i < span->end; i++) {						\
-      const GLfloat fogCoord = span->array->attribs[FRAG_ATTRIB_FOGC][i][0];	\
-      const GLfloat c = FABSF(fogCoord);					\
-      GLfloat f;								\
-      FOG_FUNC(f, c);								\
-      f = CLAMP(f, 0.0F, 1.0F);							\
-      index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);		\
-   }										\
-}										\
-else {										\
-   const GLfloat fogStep = span->attrStepX[FRAG_ATTRIB_FOGC][0];		\
-   GLfloat fogCoord = span->attrStart[FRAG_ATTRIB_FOGC][0];			\
-   const GLfloat wStep = span->attrStepX[FRAG_ATTRIB_WPOS][3];  		\
-   GLfloat w = span->attrStart[FRAG_ATTRIB_WPOS][3];				\
-   GLuint i;									\
-   for (i = 0; i < span->end; i++) {						\
-      const GLfloat c = FABSF(fogCoord) / w;					\
-      GLfloat f;								\
-      FOG_FUNC(f, c);								\
-      f = CLAMP(f, 0.0F, 1.0F);							\
-      index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);		\
-      fogCoord += fogStep;							\
-      w += wStep;								\
-   }										\
-}
-
-
-
 /**
  * Apply fog to a span of RGBA pixels.
  * The fog value are either in the span->array->fog array or interpolated from
@@ -162,9 +129,9 @@ else {										\
  * _PreferPixelFog should be in sync with that state!
  */
 void
-_swrast_fog_rgba_span( const GLcontext *ctx, SWspan *span )
+_swrast_fog_rgba_span( const struct gl_context *ctx, SWspan *span )
 {
-   const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   const SWcontext *swrast = CONST_SWRAST_CONTEXT(ctx);
    GLfloat rFog, gFog, bFog;
 
    ASSERT(swrast->_FogEnabled);
@@ -172,14 +139,14 @@ _swrast_fog_rgba_span( const GLcontext *ctx, SWspan *span )
 
    /* compute (scaled) fog color */
    if (span->array->ChanType == GL_UNSIGNED_BYTE) {
-      rFog = ctx->Fog.Color[RCOMP] * 255.0;
-      gFog = ctx->Fog.Color[GCOMP] * 255.0;
-      bFog = ctx->Fog.Color[BCOMP] * 255.0;
+      rFog = ctx->Fog.Color[RCOMP] * 255.0F;
+      gFog = ctx->Fog.Color[GCOMP] * 255.0F;
+      bFog = ctx->Fog.Color[BCOMP] * 255.0F;
    }
    else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
-      rFog = ctx->Fog.Color[RCOMP] * 65535.0;
-      gFog = ctx->Fog.Color[GCOMP] * 65535.0;
-      bFog = ctx->Fog.Color[BCOMP] * 65535.0;
+      rFog = ctx->Fog.Color[RCOMP] * 65535.0F;
+      gFog = ctx->Fog.Color[GCOMP] * 65535.0F;
+      bFog = ctx->Fog.Color[BCOMP] * 65535.0F;
    }
    else {
       rFog = ctx->Fog.Color[RCOMP];
@@ -191,7 +158,7 @@ _swrast_fog_rgba_span( const GLcontext *ctx, SWspan *span )
       /* The span's fog values are fog coordinates, now compute blend factors
        * and blend the fragment colors with the fog color.
        */
-      switch (swrast->_FogMode) {
+      switch (ctx->Fog.Mode) {
       case GL_LINEAR:
          {
             const GLfloat fogEnd = ctx->Fog.End;
@@ -275,56 +242,3 @@ _swrast_fog_rgba_span( const GLcontext *ctx, SWspan *span )
       }
    }
 }
-
-
-/**
- * As above, but color index mode.
- */
-void
-_swrast_fog_ci_span( const GLcontext *ctx, SWspan *span )
-{
-   const SWcontext *swrast = SWRAST_CONTEXT(ctx);
-   const GLuint fogIndex = (GLuint) ctx->Fog.Index;
-   GLuint *index = span->array->index;
-
-   ASSERT(swrast->_FogEnabled);
-   ASSERT(span->arrayMask & SPAN_INDEX);
-
-   /* we need to compute fog blend factors */
-   if (swrast->_PreferPixelFog) {
-      /* The span's fog values are fog coordinates, now compute blend factors
-       * and blend the fragment colors with the fog color.
-       */
-      switch (ctx->Fog.Mode) {
-      case GL_LINEAR:
-         {
-            const GLfloat fogEnd = ctx->Fog.End;
-            const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)
-               ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
-            FOG_LOOP_CI(LINEAR_FOG);
-         }
-         break;
-      case GL_EXP:
-         {
-            const GLfloat density = -ctx->Fog.Density;
-            FOG_LOOP_CI(EXP_FOG);
-         }
-         break;
-      case GL_EXP2:
-         {
-            const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
-            FOG_LOOP_CI(EXP2_FOG);
-         }
-         break;
-      default:
-         _mesa_problem(ctx, "Bad fog mode in _swrast_fog_ci_span");
-         return;
-      }
-   }
-   else {
-      /* The span's fog start/step/array values are blend factors in [0,1].
-       * They were previously computed per-vertex.
-       */
-      FOG_LOOP_CI(BLEND_FOG);
-   }
-}