wined3d: Add support for ARB_depth_clamp.

dlls/wined3d/directx.c

@@ -56,6 +56,7 @@ static const struct {
     /* ARB */
     {"GL_ARB_color_buffer_float",           ARB_COLOR_BUFFER_FLOAT,         0                           },
     {"GL_ARB_depth_buffer_float",           ARB_DEPTH_BUFFER_FLOAT,         0                           },
+    {"GL_ARB_depth_clamp",                  ARB_DEPTH_CLAMP,                0                           },
     {"GL_ARB_depth_texture",                ARB_DEPTH_TEXTURE,              0                           },
     {"GL_ARB_draw_buffers",                 ARB_DRAW_BUFFERS,               0                           },
     {"GL_ARB_fragment_program",             ARB_FRAGMENT_PROGRAM,           0                           },
@@ -1662,6 +1663,11 @@ static BOOL IWineD3DImpl_FillGLCaps(struct wined3d_gl_info *gl_info)
         TRACE_(d3d_caps)(" IMPLIED: NVIDIA (NV) Texture Gen Reflection support.\n");
         gl_info->supported[NV_TEXGEN_REFLECTION] = TRUE;
     }
+    if (!gl_info->supported[ARB_DEPTH_CLAMP] && gl_info->supported[NV_DEPTH_CLAMP])
+    {
+        TRACE_(d3d_caps)(" IMPLIED: ARB_depth_clamp support (by NV_depth_clamp).\n");
+        gl_info->supported[ARB_DEPTH_CLAMP] = TRUE;
+    }
     if (gl_info->supported[NV_TEXTURE_SHADER2])
     {
         if (gl_info->supported[NV_REGISTER_COMBINERS])

dlls/wined3d/state.c

@@ -564,16 +564,18 @@ static void state_clipping(DWORD state, IWineD3DStateBlockImpl *stateblock, stru
     if (stateblock->renderState[WINED3DRS_CLIPPING]) {
         enable  = stateblock->renderState[WINED3DRS_CLIPPLANEENABLE];
         disable = ~stateblock->renderState[WINED3DRS_CLIPPLANEENABLE];
-        if(GL_SUPPORT(NV_DEPTH_CLAMP)) {
-            glDisable(GL_DEPTH_CLAMP_NV);
-            checkGLcall("glDisable(GL_DEPTH_CLAMP_NV)");
+        if (GL_SUPPORT(ARB_DEPTH_CLAMP))
+        {
+            glDisable(GL_DEPTH_CLAMP);
+            checkGLcall("glDisable(GL_DEPTH_CLAMP)");
         }
     } else {
         disable = 0xffffffff;
         enable  = 0x00;
-        if(GL_SUPPORT(NV_DEPTH_CLAMP)) {
-            glEnable(GL_DEPTH_CLAMP_NV);
-            checkGLcall("glEnable(GL_DEPTH_CLAMP_NV)");
+        if (GL_SUPPORT(ARB_DEPTH_CLAMP))
+        {
+            glEnable(GL_DEPTH_CLAMP);
+            checkGLcall("glEnable(GL_DEPTH_CLAMP)");
         }
     }
 

dlls/wined3d/wined3d_gl.h

@@ -1528,6 +1528,12 @@ typedef void (WINE_GLAPI *PGLFNCLAMPCOLORARBPROC) (GLenum target, GLenum clamp);
 #define GL_FLOAT_32_UNSIGNED_INT_24_8_REV 0x8dad
 #endif
 
+/* GL_ARB_depth_clamp */
+#ifndef GL_ARB_depth_clamp
+#define GL_ARB_depth_clamp 1
+#define GL_DEPTH_CLAMP                    0x864f
+#endif
+
 /* GL_ARB_depth_texture */
 #ifndef GL_ARB_depth_texture
 #define GL_ARB_depth_texture 1
@@ -3405,6 +3411,7 @@ typedef enum _GL_SupportedExt {
   /* ARB */
   ARB_COLOR_BUFFER_FLOAT,
   ARB_DEPTH_BUFFER_FLOAT,
+  ARB_DEPTH_CLAMP,
   ARB_DEPTH_TEXTURE,
   ARB_DRAW_BUFFERS,
   ARB_FRAGMENT_PROGRAM,