From ba3da6154c324cc916845bc5de3de077d0b59ffc Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Sat, 12 Nov 2005 18:44:29 +0000
Subject: Added OSMesaColorClamp(), bug 4917

---
 src/mesa/main/blend.c   | 3 +++
 src/mesa/main/context.c | 6 ------
 src/mesa/main/image.c   | 2 +-
 src/mesa/main/mtypes.h  | 9 +++------
 4 files changed, 7 insertions(+), 13 deletions(-)

(limited to 'src/mesa/main')

diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
index 61b2b17c0c..aebc70421a 100644
--- a/src/mesa/main/blend.c
+++ b/src/mesa/main/blend.c
@@ -574,6 +574,9 @@ void _mesa_init_color( GLcontext * ctx )
    else {
       ctx->Color.DrawBuffer[0] = GL_FRONT;
    }
+
+   ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB;
+   ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;
 }
 
 /*@}*/
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 698dbd33bf..b25300a0b0 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -1090,12 +1090,6 @@ init_attrib_groups( GLcontext *ctx )
    ctx->NewState = _NEW_ALL;
    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
    ctx->_Facing = 0;
-#if CHAN_TYPE == GL_FLOAT
-   ctx->ClampFragmentColors = GL_FALSE; /* XXX temporary */
-#else
-   ctx->ClampFragmentColors = GL_TRUE;
-#endif
-   ctx->ClampVertexColors = GL_TRUE;
 
    return GL_TRUE;
 }
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index b9a032307c..0a117a967b 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1079,7 +1079,7 @@ _mesa_pack_rgba_span_float( GLcontext *ctx,
 
    if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) {
       /* compute luminance values */
-      if (ctx->ClampFragmentColors) {
+      if (ctx->Color.ClampReadColor == GL_TRUE) {
          for (i = 0; i < n; i++) {
             GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
             luminance[i] = CLAMP(sum, 0.0F, 1.0F);
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 1a90583295..17978e7135 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -536,6 +536,9 @@ struct gl_colorbuffer_attrib
    /*@}*/
 
    GLboolean DitherFlag;		/**< Dither enable flag */
+
+   GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
+   GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 };
 
 
@@ -2896,12 +2899,6 @@ struct __GLcontextRec
 		    * We don't have a better way to communicate this value from
 		    * swrast_setup to swrast. */
 
-   /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
-   /*@{*/
-   GLboolean ClampFragmentColors;
-   GLboolean ClampVertexColors;
-   /*@}*/
-
    /** \name For debugging/development only */
    /*@{*/
    GLboolean FirstTimeCurrent;
-- 
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