dolphin/Source/Core/VideoCommon/Src/PixelShaderGen.h

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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#ifndef GCOGL_PIXELSHADER_H
#define GCOGL_PIXELSHADER_H
#include "VideoCommon.h"
#define I_COLORS "color"
#define I_KCOLORS "k"
#define I_ALPHA "alphaRef"
#define I_TEXDIMS "texdim"
#define I_ZBIAS "czbias"
#define I_INDTEXSCALE "cindscale"
#define I_INDTEXMTX "cindmtx"
#define I_FOG "cfog"
#define I_PLIGHTS "cPLights"
#define I_PMATERIALS "cPmtrl"
#define C_COLORMATRIX 0 // 0
#define C_COLORS 0 // 0
#define C_KCOLORS (C_COLORS + 4) // 4
#define C_ALPHA (C_KCOLORS + 4) // 8
#define C_TEXDIMS (C_ALPHA + 1) // 9
#define C_ZBIAS (C_TEXDIMS + 8) //17
#define C_INDTEXSCALE (C_ZBIAS + 2) //19
#define C_INDTEXMTX (C_INDTEXSCALE + 2) //21
#define C_FOG (C_INDTEXMTX + 6) //27
#define C_PLIGHTS (C_FOG + 3)
#define C_PMATERIALS (C_PLIGHTS + 40)
#define C_PENVCONST_END (C_PMATERIALS + 4)
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#define PIXELSHADERUID_MAX_VALUES 70
#define PIXELSHADERUID_MAX_VALUES_SAFE 115
// Annoying sure, can be removed once we get up to GLSL ~1.3
const s_svar PSVar_Loc[] = { {I_COLORS, C_COLORS, 4 },
{I_KCOLORS, C_KCOLORS, 4 },
{I_ALPHA, C_ALPHA, 1 },
{I_TEXDIMS, C_TEXDIMS, 8 },
{I_ZBIAS , C_ZBIAS, 2 },
{I_INDTEXSCALE , C_INDTEXSCALE, 2 },
{I_INDTEXMTX, C_INDTEXMTX, 6 },
{I_FOG, C_FOG, 3 },
{I_PLIGHTS, C_PLIGHTS, 40 },
{I_PMATERIALS, C_PMATERIALS, 4 },
};
// DO NOT make anything in this class virtual.
template<bool safe>
class _PIXELSHADERUID
{
public:
u32 values[safe ? PIXELSHADERUID_MAX_VALUES_SAFE : PIXELSHADERUID_MAX_VALUES];
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int num_values;
_PIXELSHADERUID()
{
}
_PIXELSHADERUID(const _PIXELSHADERUID& r)
{
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num_values = r.num_values;
if (safe) memcpy(values, r.values, PIXELSHADERUID_MAX_VALUES_SAFE);
else memcpy(values, r.values, r.GetNumValues() * sizeof(values[0]));
}
int GetNumValues() const
{
if (safe) return (sizeof(values) / sizeof(u32));
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else return num_values;
}
bool operator <(const _PIXELSHADERUID& _Right) const
{
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int N = GetNumValues();
if (N < _Right.GetNumValues())
return true;
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else if (N > _Right.GetNumValues())
return false;
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for (int i = 0; i < N; ++i)
{
if (values[i] < _Right.values[i])
return true;
else if (values[i] > _Right.values[i])
return false;
}
return false;
}
bool operator ==(const _PIXELSHADERUID& _Right) const
{
int N = GetNumValues();
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if (N != _Right.GetNumValues())
return false;
for (int i = 0; i < N; ++i)
{
if (values[i] != _Right.values[i])
return false;
}
return true;
}
};
typedef _PIXELSHADERUID<false> PIXELSHADERUID;
typedef _PIXELSHADERUID<true> PIXELSHADERUIDSAFE;
// Different ways to achieve rendering with destination alpha
enum DSTALPHA_MODE
{
DSTALPHA_NONE, // Render normally, without destination alpha
DSTALPHA_ALPHA_PASS, // Render normally first, then render again for alpha
DSTALPHA_DUAL_SOURCE_BLEND // Use dual-source blending
};
const char *GeneratePixelShaderCode(DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components);
void GetPixelShaderId(PIXELSHADERUID *uid, DSTALPHA_MODE dstAlphaMode, u32 components);
void GetSafePixelShaderId(PIXELSHADERUIDSAFE *uid, DSTALPHA_MODE dstAlphaMode, u32 components);
// Used to make sure that our optimized pixel shader IDs don't lose any possible shader code changes
void ValidatePixelShaderIDs(API_TYPE api, PIXELSHADERUIDSAFE old_id, const std::string& old_code, DSTALPHA_MODE dstAlphaMode, u32 components);
#endif // GCOGL_PIXELSHADER_H