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PixelShaderGen: Slightly reduce the number of redundant shader compilations.

This commit is contained in:
NeoBrainX 2013-03-29 14:51:54 +01:00
parent a171525df6
commit f2a8fbb314
2 changed files with 9 additions and 8 deletions
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12
Source/Core/VideoCommon/Src/PixelShaderGen.cpp
View File

@ -289,7 +289,7 @@ void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u
out.Write("//%i TEV stages, %i texgens, XXX IND stages\n",
numStages, numTexgen/*, bpmem.genMode.numindstages*/);
SetUidField(components, components);
// SetUidField(components, components); // TODO: Enable once per pixel lighting is implemented again
SetUidField(dstAlphaMode, dstAlphaMode);
SetUidField(genMode.numindstages, bpmem.genMode.numindstages);
@ -620,8 +620,8 @@ void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u
// Note: depth textures are disabled if early depth test is enabled
SetUidField(ztex.op, bpmem.ztex2.op);
SetUidField(early_z, bpmem.zcontrol.early_ztest); // TODO: Should be per_pixel_depth instead...
SetUidField(ztestenable, bpmem.zmode.testenable); // TODO: Should be fog instead...
SetUidField(per_pixel_depth, per_pixel_depth);
SetUidField(fog.fsel, bpmem.fog.c_proj_fsel.fsel);
// 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
bool skip_ztexture = !per_pixel_depth && !bpmem.fog.c_proj_fsel.fsel;
@ -632,12 +632,13 @@ void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u
out.Write("zCoord = dot(" I_ZBIAS"[0].xyzw, textemp.xyzw) + " I_ZBIAS"[1].w %s;\n",
(bpmem.ztex2.op == ZTEXTURE_ADD) ? "+ zCoord" : "");
// scale to make result from frac correct
// U24 overflow emulation
out.Write("zCoord = zCoord * (16777215.0f/16777216.0f);\n");
out.Write("zCoord = frac(zCoord);\n");
out.Write("zCoord = zCoord * (16777216.0f/16777215.0f);\n");
// Note: depth texture output is only written to depth buffer if late depth test is used
// TODO: Should this be outside the ztex if-block?
// final depth value is used for fog calculation, though
if (per_pixel_depth)
out.Write("depth = zCoord;\n");
}
@ -1167,6 +1168,7 @@ static void WriteAlphaTest(T& out, API_TYPE ApiType, DSTALPHA_MODE dstAlphaMode,
// when the alpha test fail. This is not a correct implementation because
// even if the depth test fails the fragment could be alpha blended, but
// we don't have a choice.
SetUidField(alpha_test.use_zcomploc_hack, bpmem.zcontrol.early_ztest && bpmem.zmode.updateenable);
if (!(bpmem.zcontrol.early_ztest && bpmem.zmode.updateenable))
{
out.Write("\t\tdiscard;\n");

5
Source/Core/VideoCommon/Src/PixelShaderGen.h
View File

@ -163,6 +163,7 @@ struct pixel_shader_uid_data
u32 comp1 : 3;
u32 logic : 2;
// TODO: ref???
u32 use_zcomploc_hack : 1;
} alpha_test;
union {
@ -182,9 +183,7 @@ struct pixel_shader_uid_data
u32 hex : 2;
} ztex;
u32 early_z : 1;
u32 ztestenable : 1;
u32 per_pixel_depth : 1;
u32 bHasIndStage : 16;
u32 xfregs_numTexGen_numTexGens : 4;