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/Plugins/Plugin_VideoOGL/Src/VertexShaderCache.cpp

@@ -44,7 +44,7 @@ bool VertexShaderCache::ShaderEnabled;
 
 static VERTEXSHADER *pShaderLast = NULL;
 static int s_nMaxVertexInstructions;
-static float GC_ALIGNED16(lastVSconstants[C_FOGPARAMS+8][4]);
+static float GC_ALIGNED16(lastVSconstants[C_VENVCONST_END][4]);
 
 void SetVSConstant4f(unsigned int const_number, float f1, float f2, float f3, float f4)
 {
@@ -105,7 +105,7 @@ void VertexShaderCache::Init()
 	glEnable(GL_VERTEX_PROGRAM_ARB);
 	ShaderEnabled = true;
 	CurrentShader = 0;
-	for (int i = 0; i < (C_FOGPARAMS + 8) * 4; i++)
+	for (int i = 0; i < (C_VENVCONST_END * 4); i++)
 		lastVSconstants[i / 4][i % 4] = -100000000.0f;
 	memset(&last_vertex_shader_uid, 0xFF, sizeof(last_vertex_shader_uid));