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PixelShaderGen: apply zfreeze before ztextures 

The zfreeze option freezes the depth plane of the rasterization.
So this is done before the TEV stages, where the z-textures are applied.
This commit is contained in:
degasus 2015-05-07 22:48:49 +02:00
parent bdeb067597
commit 3d98f6ab9f
1 changed files with 25 additions and 34 deletions
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59
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -144,7 +144,6 @@ template<class T> static inline void WriteTevRegular(T& out, const char* compone
template<class T> static inline void SampleTexture(T& out, const char *texcoords, const char *texswap, int texmap, API_TYPE ApiType);
template<class T> static inline void WriteAlphaTest(T& out, pixel_shader_uid_data* uid_data, API_TYPE ApiType,DSTALPHA_MODE dstAlphaMode, bool per_pixel_depth);
template<class T> static inline void WriteFog(T& out, pixel_shader_uid_data* uid_data);
template<class T> static inline void WritePerPixelDepth(T& out, pixel_shader_uid_data* uid_data, API_TYPE ApiType);
template<class T>
static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components)
@ -557,19 +556,34 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
if (Pretest == AlphaTest::UNDETERMINED || (Pretest == AlphaTest::FAIL && bpmem.UseLateDepthTest()))
WriteAlphaTest<T>(out, uid_data, ApiType, dstAlphaMode, per_pixel_depth);
// FastDepth means to trust the depth generated in perspective division.
// It should be correct, but it seems not to be as accurate as required. TODO: Find out why!
// For disabled FastDepth we just calculate the depth value again.
// The performance impact of this additional calculation doesn't matter, but it prevents
// the host GPU driver from performing any early depth test optimizations.
if (g_ActiveConfig.bFastDepthCalc)
out.Write("\tint zCoord = int(rawpos.z * 16777216.0);\n");
else
if (bpmem.genMode.zfreeze)
{
out.SetConstantsUsed(C_ZSLOPE, C_ZSLOPE);
out.SetConstantsUsed(C_EFBSCALE, C_EFBSCALE);
out.Write("\tfloat2 screenpos = rawpos.xy * " I_EFBSCALE".xy;\n");
// Opengl has reversed vertical screenspace coordiantes
if (ApiType == API_OPENGL)
out.Write("\tscreenpos.y = %i - screenpos.y;\n", EFB_HEIGHT);
out.Write("\tint zCoord = int(" I_ZSLOPE".z + " I_ZSLOPE".x * screenpos.x + " I_ZSLOPE".y * screenpos.y);\n");
}
else if (!g_ActiveConfig.bFastDepthCalc)
{
// FastDepth means to trust the depth generated in perspective division.
// It should be correct, but it seems not to be as accurate as required. TODO: Find out why!
// For disabled FastDepth we just calculate the depth value again.
// The performance impact of this additional calculation doesn't matter, but it prevents
// the host GPU driver from performing any early depth test optimizations.
out.SetConstantsUsed(C_ZBIAS+1, C_ZBIAS+1);
// the screen space depth value = far z + (clip z / clip w) * z range
out.Write("\tint zCoord = " I_ZBIAS"[1].x + int((clipPos.z / clipPos.w) * float(" I_ZBIAS"[1].y));\n");
}
else
{
out.Write("\tint zCoord = int(rawpos.z * 16777216.0);\n");
}
out.Write("\tzCoord = clamp(zCoord, " I_ZBIAS"[1].x - " I_ZBIAS"[1].y, " I_ZBIAS"[1].x);\n");
// depth texture can safely be ignored if the result won't be written to the depth buffer (early_ztest) and isn't used for fog either
@ -586,7 +600,7 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
// Note: z-textures are not written to depth buffer if early depth test is used
if (per_pixel_depth && bpmem.UseEarlyDepthTest())
{
WritePerPixelDepth<T>(out, uid_data, ApiType);
out.Write("\tdepth = float(zCoord) / 16777216.0;\n");
}
// Note: depth texture output is only written to depth buffer if late depth test is used
@ -602,7 +616,7 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
if (per_pixel_depth && bpmem.UseLateDepthTest())
{
WritePerPixelDepth<T>(out, uid_data, ApiType);
out.Write("\tdepth = float(zCoord) / 16777216.0;\n");
}
if (dstAlphaMode == DSTALPHA_ALPHA_PASS)
@ -1211,29 +1225,6 @@ static inline void WriteFog(T& out, pixel_shader_uid_data* uid_data)
out.Write("\tprev.rgb = (prev.rgb * (256 - ifog) + " I_FOGCOLOR".rgb * ifog) >> 8;\n");
}
template<class T>
static inline void WritePerPixelDepth(T& out, pixel_shader_uid_data* uid_data, API_TYPE ApiType)
{
if (bpmem.genMode.zfreeze)
{
out.SetConstantsUsed(C_ZSLOPE, C_ZSLOPE);
out.SetConstantsUsed(C_EFBSCALE, C_EFBSCALE);
out.Write("\tfloat2 screenpos = rawpos.xy * " I_EFBSCALE".xy;\n");
// Opengl has reversed vertical screenspace coordiantes
if (ApiType == API_OPENGL)
out.Write("\tscreenpos.y = %i - screenpos.y;\n", EFB_HEIGHT);
out.Write("\tdepth = float(" I_ZSLOPE".z + " I_ZSLOPE".x * screenpos.x + " I_ZSLOPE".y * screenpos.y) / 16777216.0;\n");
}
else
{
out.Write("\tdepth = float(zCoord) / 16777216.0;\n");
}
}
void GetPixelShaderUid(PixelShaderUid& object, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components)
{
GeneratePixelShader<PixelShaderUid>(object, dstAlphaMode, ApiType, components);