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

1 files changed, 4 insertions, 6 deletions

diff --git a/Source/Core/VideoCommon/Src/VertexShaderGen.cpp b/Source/Core/VideoCommon/Src/VertexShaderGen.cpp
index 582cae9d64..02a482229b 100644
--- a/Source/Core/VideoCommon/Src/VertexShaderGen.cpp
+++ b/Source/Core/VideoCommon/Src/VertexShaderGen.cpp
@@ -135,6 +135,7 @@ const char *GenerateVertexShaderCode(u32 components, API_TYPE api_type)
 	WRITE(p, "uniform s_"I_LIGHTS" "I_LIGHTS" : register(c%d);\n", C_LIGHTS);
 	WRITE(p, "uniform s_"I_MATERIALS" "I_MATERIALS" : register(c%d);\n", C_MATERIALS);
 	WRITE(p, "uniform s_"I_PROJECTION" "I_PROJECTION" : register(c%d);\n", C_PROJECTION);
+	WRITE(p, "uniform float4 "I_DEPTHPARAMS" : register(c%d);\n", C_DEPTHPARAMS);
 
 	WRITE(p, "VS_OUTPUT main(\n");
 	
@@ -462,14 +463,11 @@ const char *GenerateVertexShaderCode(u32 components, API_TYPE api_type)
 		WRITE(p, "o.tex3.w = o.pos.w;\n");
 	}
 
+	//write the true depth value, if the game uses depth textures pixel shaders will override with the correct values
+	//if not early z culling will improve speed
 	if (is_d3d)
 	{
-		WRITE(p, "o.pos.z = o.pos.z + o.pos.w;\n");
-	}
-	else
-	{
-		// scale to gl clip space - which is -o.pos.w to o.pos.w, hence the addition.
-		WRITE(p, "o.pos.z = (o.pos.z * 2.0f) + o.pos.w;\n");
+		WRITE(p, "o.pos.z = "I_DEPTHPARAMS".x * o.pos.w + o.pos.z * "I_DEPTHPARAMS".y;\n");
 	}
 
 	WRITE(p, "return o;\n}\n");