big changes here:

- Eliminate the useless check for cpu modifications option from efb to ram as it must be enabled always
- use constant names in dx11 for buffer length calculation instead to simplify code reading
- implemented scaled efb copy in opengl, still bugy in some games, the option is not in the gui but will add it when it works perfect
- Change the depth calculation behavior:
if the game use z textures is exactly the same as before.
if the game do not use z texture calculate z values in the vertex shader. the advantage id this approach is that early z culling is applied,
improving fill rate. this mus speed up things, even with ssaa and msaa enabled.
please test for regression and enjoy.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5896 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/VideoCommon/Src/VertexShaderGen.h

@@ -35,7 +35,7 @@
 #define I_TRANSFORMMATRICES     "ctrmtx"
 #define I_NORMALMATRICES        "cnmtx"
 #define I_POSTTRANSFORMMATRICES "cpostmtx"
-#define I_FOGPARAMS             "cfog"
+#define I_DEPTHPARAMS           "cDepth"
 
 #define C_POSNORMALMATRIX        0
 #define C_PROJECTION            (C_POSNORMALMATRIX + 6)
@@ -45,8 +45,8 @@
 #define C_TRANSFORMMATRICES     (C_TEXMATRICES + 24)
 #define C_NORMALMATRICES        (C_TRANSFORMMATRICES + 64)
 #define C_POSTTRANSFORMMATRICES (C_NORMALMATRICES + 32)
-#define C_FOGPARAMS             (C_POSTTRANSFORMMATRICES + 64)
-
+#define C_DEPTHPARAMS           (C_POSTTRANSFORMMATRICES + 64)
+#define C_VENVCONST_END			(C_DEPTHPARAMS + 4)
 
 class VERTEXSHADERUID
 {