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-rw-r--r--src/mesa/main/enable.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index 4bc54771e97..d066153fc2c 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -37,6 +37,7 @@
#include "mtypes.h"
#include "enums.h"
#include "math/m_matrix.h"
+#include "math/m_xform.h"
#include "api_arrayelt.h"
@@ -947,6 +948,20 @@ _mesa_set_enable(GLcontext *ctx, GLenum cap, GLboolean state)
ctx->Depth.BoundsTest = state;
break;
+ case GL_DEPTH_CLAMP:
+ if (ctx->Transform.DepthClamp == state)
+ return;
+ /* Neither the x86 nor sparc asm cliptest functions have been updated
+ * for ARB_depth_clamp, so force the C paths.
+ */
+ if (state)
+ init_c_cliptest();
+
+ CHECK_EXTENSION(ARB_depth_clamp, cap);
+ FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
+ ctx->Transform.DepthClamp = state;
+ break;
+
#if FEATURE_ATI_fragment_shader
case GL_FRAGMENT_SHADER_ATI:
CHECK_EXTENSION(ATI_fragment_shader, cap);
@@ -1395,6 +1410,11 @@ _mesa_IsEnabled( GLenum cap )
CHECK_EXTENSION(EXT_depth_bounds_test);
return ctx->Depth.BoundsTest;
+ /* GL_ARB_depth_clamp */
+ case GL_DEPTH_CLAMP:
+ CHECK_EXTENSION(ARB_depth_clamp);
+ return ctx->Transform.DepthClamp;
+
#if FEATURE_ATI_fragment_shader
case GL_FRAGMENT_SHADER_ATI:
CHECK_EXTENSION(ATI_fragment_shader);