From acc722d4b890da7ed0ede24751e2bcaf28cc1468 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Tue, 26 Jun 2001 21:15:35 +0000
Subject: More raster fog coord fixes. New truncate vs. floor comments in
 drawpixels.c Added current raster secondary color state, not used yet.

---
 src/mesa/swrast/s_bitmap.c  | 20 +++++++++-----------
 src/mesa/swrast/s_copypix.c | 34 +++++++++++++---------------------
 src/mesa/swrast/s_drawpix.c | 18 +++++++-----------
 3 files changed, 29 insertions(+), 43 deletions(-)

(limited to 'src/mesa/swrast')

diff --git a/src/mesa/swrast/s_bitmap.c b/src/mesa/swrast/s_bitmap.c
index 17387ba0af..5f12993314 100644
--- a/src/mesa/swrast/s_bitmap.c
+++ b/src/mesa/swrast/s_bitmap.c
@@ -1,4 +1,4 @@
-/* $Id: s_bitmap.c,v 1.11 2001/06/18 23:55:18 brianp Exp $ */
+/* $Id: s_bitmap.c,v 1.12 2001/06/26 21:15:36 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -49,7 +49,7 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
    struct pixel_buffer *PB = swrast->PB;
    GLint row, col;
    GLdepth fragZ;
-   GLfloat fogCoord;
+   GLfloat fog;
 
    ASSERT(ctx->RenderMode == GL_RENDER);
    ASSERT(bitmap);
@@ -75,15 +75,13 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
    fragZ = (GLdepth) ( ctx->Current.RasterPos[2] * ctx->DepthMaxF);
 
    if (ctx->Fog.Enabled) {
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
-         fogCoord = ctx->Current.FogCoord;
-      }
-      else {
-         fogCoord = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
-      }
+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.FogCoord);
+      else
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
    }
    else {
-      fogCoord = 0.0;
+      fog = 0.0;
    }
 
    for (row=0; row<height; row++) {
@@ -95,7 +93,7 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
          GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
          for (col=0; col<width; col++) {
             if (*src & mask) {
-               PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord );
+               PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fog );
             }
             if (mask == 128U) {
                src++;
@@ -117,7 +115,7 @@ _swrast_Bitmap( GLcontext *ctx, GLint px, GLint py,
          GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
          for (col=0; col<width; col++) {
             if (*src & mask) {
-               PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fogCoord );
+               PB_WRITE_PIXEL( PB, px+col, py+row, fragZ, fog );
             }
             if (mask == 1U) {
                src++;
diff --git a/src/mesa/swrast/s_copypix.c b/src/mesa/swrast/s_copypix.c
index 3c7ee260d9..ab8198945c 100644
--- a/src/mesa/swrast/s_copypix.c
+++ b/src/mesa/swrast/s_copypix.c
@@ -1,4 +1,4 @@
-/* $Id: s_copypix.c,v 1.20 2001/06/18 23:55:18 brianp Exp $ */
+/* $Id: s_copypix.c,v 1.21 2001/06/26 21:15:36 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -114,12 +114,10 @@ copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
       GLfloat fog;
       GLint i;
 
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
-         fog = ctx->Current.RasterFogCoord;
-      }
-      else {
+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterFogCoord);
+      else
          fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
-      }
 
       for (i = 0; i < width; i++) {
          zspan[i] = z;
@@ -354,12 +352,10 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
       GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * ctx->DepthMax);
       GLfloat fog;
 
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
-         fog = ctx->Current.RasterFogCoord;
-      }
-      else {
+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterFogCoord);
+      else
          fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
-      }
 
       for (i=0;i<width;i++) {
          zspan[i] = z;
@@ -620,12 +616,10 @@ static void copy_ci_pixels( GLcontext *ctx,
       GLdepth z = (GLdepth) (ctx->Current.RasterPos[2] * ctx->DepthMax);
       GLfloat fog;
 
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
-         fog = ctx->Current.RasterFogCoord;
-      }
-      else {
+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterFogCoord);
+      else
          fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
-      }
 
       for (i=0;i<width;i++) {
          zspan[i] = z;
@@ -769,12 +763,10 @@ static void copy_depth_pixels( GLcontext *ctx, GLint srcx, GLint srcy,
    if (ctx->Fog.Enabled) {
       GLfloat fog;
 
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
-         fog = ctx->Current.RasterFogCoord;
-      }
-      else {
+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterFogCoord);
+      else
          fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
-      }
 
       for (i = 0; i < width; i++) {
          fogSpan[i] = fog;
diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c
index fb11af5e44..e618dc0a23 100644
--- a/src/mesa/swrast/s_drawpix.c
+++ b/src/mesa/swrast/s_drawpix.c
@@ -1,4 +1,4 @@
-/* $Id: s_drawpix.c,v 1.21 2001/06/18 23:55:18 brianp Exp $ */
+/* $Id: s_drawpix.c,v 1.22 2001/06/26 21:15:36 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -501,12 +501,10 @@ draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
       GLfloat fog;
       GLint i;
 
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
-         fog = ctx->Current.RasterFogCoord;
-      }
-      else {
+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterFogCoord);
+      else
          fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
-      }
 
       for (i = 0; i < drawWidth; i++) {
 	 zspan[i] = zval;
@@ -747,12 +745,10 @@ draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
       GLfloat fog;
       GLint i;
 
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) {
-         fog = ctx->Current.RasterFogCoord;
-      }
-      else {
+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
+         fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterFogCoord);
+      else
          fog = _mesa_z_to_fogfactor(ctx, ctx->Current.RasterDistance);
-      }
 
       for (i=0;i<width;i++) {
 	 zspan[i] = z;
-- 
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