1 files changed, 21 insertions, 16 deletions

diff --git a/mesalib/src/mesa/main/blend.c b/mesalib/src/mesa/main/blend.c
index 774fc888e..d869fa2aa 100644
--- a/mesalib/src/mesa/main/blend.c
+++ b/mesalib/src/mesa/main/blend.c
@@ -769,7 +769,7 @@ _mesa_ClampColor(GLenum target, GLenum clamp)
       }
       FLUSH_VERTICES(ctx, _NEW_LIGHT);
       ctx->Light.ClampVertexColor = clamp;
-      _mesa_update_clamp_vertex_color(ctx);
+      _mesa_update_clamp_vertex_color(ctx, ctx->DrawBuffer);
       break;
    case GL_CLAMP_FRAGMENT_COLOR_ARB:
       if (ctx->API == API_OPENGL_CORE &&
@@ -778,7 +778,7 @@ _mesa_ClampColor(GLenum target, GLenum clamp)
       }
       FLUSH_VERTICES(ctx, _NEW_FRAG_CLAMP);
       ctx->Color.ClampFragmentColor = clamp;
-      _mesa_update_clamp_fragment_color(ctx);
+      _mesa_update_clamp_fragment_color(ctx, ctx->DrawBuffer);
       break;
    case GL_CLAMP_READ_COLOR_ARB:
       ctx->Color.ClampReadColor = clamp;
@@ -807,50 +807,55 @@ get_clamp_color(const struct gl_framebuffer *fb, GLenum clamp)
 }
 
 GLboolean
-_mesa_get_clamp_fragment_color(const struct gl_context *ctx)
+_mesa_get_clamp_fragment_color(const struct gl_context *ctx,
+                               const struct gl_framebuffer *drawFb)
 {
-   return get_clamp_color(ctx->DrawBuffer,
-                                ctx->Color.ClampFragmentColor);
+   return get_clamp_color(drawFb, ctx->Color.ClampFragmentColor);
 }
 
 GLboolean
-_mesa_get_clamp_vertex_color(const struct gl_context *ctx)
+_mesa_get_clamp_vertex_color(const struct gl_context *ctx,
+                             const struct gl_framebuffer *drawFb)
 {
-   return get_clamp_color(ctx->DrawBuffer, ctx->Light.ClampVertexColor);
+   return get_clamp_color(drawFb, ctx->Light.ClampVertexColor);
 }
 
 GLboolean
-_mesa_get_clamp_read_color(const struct gl_context *ctx)
+_mesa_get_clamp_read_color(const struct gl_context *ctx,
+                           const struct gl_framebuffer *readFb)
 {
-   return get_clamp_color(ctx->ReadBuffer, ctx->Color.ClampReadColor);
+   return get_clamp_color(readFb, ctx->Color.ClampReadColor);
 }
 
 /**
  * Update the ctx->Color._ClampFragmentColor field
  */
 void
-_mesa_update_clamp_fragment_color(struct gl_context *ctx)
+_mesa_update_clamp_fragment_color(struct gl_context *ctx,
+                                  const struct gl_framebuffer *drawFb)
 {
-   struct gl_framebuffer *fb = ctx->DrawBuffer;
-
    /* Don't clamp if:
     * - there is no colorbuffer
     * - all colorbuffers are unsigned normalized, so clamping has no effect
     * - there is an integer colorbuffer
     */
-   if (!fb || !fb->_HasSNormOrFloatColorBuffer || fb->_IntegerColor)
+   if (!drawFb || !drawFb->_HasSNormOrFloatColorBuffer ||
+       drawFb->_IntegerColor)
       ctx->Color._ClampFragmentColor = GL_FALSE;
    else
-      ctx->Color._ClampFragmentColor = _mesa_get_clamp_fragment_color(ctx);
+      ctx->Color._ClampFragmentColor =
+         _mesa_get_clamp_fragment_color(ctx, drawFb);
 }
 
 /**
  * Update the ctx->Color._ClampVertexColor field
  */
 void
-_mesa_update_clamp_vertex_color(struct gl_context *ctx)
+_mesa_update_clamp_vertex_color(struct gl_context *ctx,
+                                const struct gl_framebuffer *drawFb)
 {
-   ctx->Light._ClampVertexColor = _mesa_get_clamp_vertex_color(ctx);
+   ctx->Light._ClampVertexColor =
+         _mesa_get_clamp_vertex_color(ctx, drawFb);
 }
 
 /**