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-rw-r--r--src/mesa/main/light.c37
1 files changed, 35 insertions, 2 deletions
diff --git a/src/mesa/main/light.c b/src/mesa/main/light.c
index 7479fe8fc4a..10c89f43688 100644
--- a/src/mesa/main/light.c
+++ b/src/mesa/main/light.c
@@ -1,8 +1,9 @@
/*
* Mesa 3-D graphics library
- * Version: 7.0
+ * Version: 7.5
*
- * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -64,6 +65,37 @@ _mesa_ShadeModel( GLenum mode )
/**
+ * Set the provoking vertex (the vertex which specifies the prim's
+ * color when flat shading) to either the first or last vertex of the
+ * triangle or line.
+ */
+void GLAPIENTRY
+_mesa_ProvokingVertexEXT(GLenum mode)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (MESA_VERBOSE&VERBOSE_API)
+ _mesa_debug(ctx, "glProvokingVertexEXT 0x%x\n", mode);
+
+ switch (mode) {
+ case GL_FIRST_VERTEX_CONVENTION_EXT:
+ case GL_LAST_VERTEX_CONVENTION_EXT:
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glProvokingVertexEXT(0x%x)", mode);
+ return;
+ }
+
+ if (ctx->Light.ProvokingVertex == mode)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_LIGHT);
+ ctx->Light.ProvokingVertex = mode;
+}
+
+
+/**
* Helper function called by _mesa_Lightfv and _mesa_PopAttrib to set
* per-light state.
* For GL_POSITION and GL_SPOT_DIRECTION the params position/direction
@@ -1348,6 +1380,7 @@ _mesa_init_lighting( GLcontext *ctx )
init_lightmodel( &ctx->Light.Model );
init_material( &ctx->Light.Material );
ctx->Light.ShadeModel = GL_SMOOTH;
+ ctx->Light.ProvokingVertex = GL_LAST_VERTEX_CONVENTION_EXT;
ctx->Light.Enabled = GL_FALSE;
ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;