wined3d: Add support for the ARB_depth_buffer_float extension.

dlls/wined3d/directx.c

@@ -63,6 +63,7 @@ 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_texture",                ARB_DEPTH_TEXTURE,              0                           },
     {"GL_ARB_draw_buffers",                 ARB_DRAW_BUFFERS,               0                           },
     {"GL_ARB_fragment_program",             ARB_FRAGMENT_PROGRAM,           0                           },

dlls/wined3d/wined3d_gl.h

@@ -1517,6 +1517,14 @@ BOOL    (WINAPI *pwglShareLists)(HGLRC,HGLRC);
 #endif
 typedef void (WINE_GLAPI *PGLFNCLAMPCOLORARBPROC) (GLenum target, GLenum clamp);
 
+/* GL_ARB_depth_buffer_float */
+#ifndef GL_ARB_depth_buffer_float
+#define GL_ARB_depth_buffer_float 1
+#define GL_DEPTH_COMPONENT32F             0x8cac
+#define GL_DEPTH32F_STENCIL8              0x8cad
+#define GL_FLOAT_32_UNSIGNED_INT_24_8_REV 0x8dad
+#endif
+
 /* GL_ARB_depth_texture */
 #ifndef GL_ARB_depth_texture
 #define GL_ARB_depth_texture 1
@@ -3393,6 +3401,7 @@ typedef enum _GL_SupportedExt {
   WINED3D_GL_EXT_NONE,
   /* ARB */
   ARB_COLOR_BUFFER_FLOAT,
+  ARB_DEPTH_BUFFER_FLOAT,
   ARB_DEPTH_TEXTURE,
   ARB_DRAW_BUFFERS,
   ARB_FRAGMENT_PROGRAM,