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Adding software rendering plugin. This is aimed at accurate emulation, not fast. Its more like a debugging tool than actually useful.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4407 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
donkopunchstania
2009-10-12 00:48:24 +00:00
parent ab8d182c37
commit 9b16c36014
58 changed files with 10272 additions and 0 deletions
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150
Source/Plugins/Plugin_VideoSoftware/Src/TextureSampler.cpp Normal file
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// Copyright (C) 2003-2009 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/
#include "TextureSampler.h"
#include "Main.h"
#include "BPMemLoader.h"
#include "../../../Core/VideoCommon/Src/TextureDecoder.h"
#include <cmath>
namespace TextureSampler
{
inline int iround(float x)
{
int t;
__asm
{
fld x
fistp t
}
return t;
}
inline void WrapCoord(int &coord, int wrapMode, int imageSize)
{
switch (wrapMode)
{
case 0: // clamp
coord = (coord>imageSize)?imageSize:(coord<0)?0:coord;
break;
case 1: // wrap
coord = coord % (imageSize + 1);
coord = (coord<0)?imageSize+coord:coord;
break;
case 2: // mirror
{
int sizePlus1 = imageSize + 1;
int div = coord / sizePlus1;
coord = coord - (div * sizePlus1);
coord = (coord<0)?-coord:coord;
coord = (div&1)?imageSize - coord:coord;
}
break;
}
}
inline void SetTexel(u8 *inTexel, u32 *outTexel, u32 fract)
{
outTexel[0] = inTexel[0] * fract;
outTexel[1] = inTexel[1] * fract;
outTexel[2] = inTexel[2] * fract;
outTexel[3] = inTexel[3] * fract;
}
inline void AddTexel(u8 *inTexel, u32 *outTexel, u32 fract)
{
outTexel[0] += inTexel[0] * fract;
outTexel[1] += inTexel[1] * fract;
outTexel[2] += inTexel[2] * fract;
outTexel[3] += inTexel[3] * fract;
}
void Sample(float s, float t, float lod, u8 texmap, u8 *sample)
{
FourTexUnits& texUnit = bpmem.tex[(texmap >> 2) & 1];
u8 subTexmap = texmap & 3;
TexMode0& tm0 = texUnit.texMode0[subTexmap];
TexImage0& ti0 = texUnit.texImage0[subTexmap];
TexTLUT& texTlut = texUnit.texTlut[subTexmap];
u32 imageBase = texUnit.texImage3[subTexmap].image_base << 5;
u8 *imageSrc = g_VideoInitialize.pGetMemoryPointer(imageBase);
bool linear = false;
if (lod > 0 && tm0.min_filter > 4 || lod <= 0 && tm0.mag_filter)
linear = true;
if (linear)
{
s32 s256 = s32((s - 0.5f) * 256);
s32 t256 = s32((t- 0.5f) * 256);
int imageS = s256 >> 8;
int imageSPlus1 = imageS + 1;
u32 fractS = s256 & 0xff;
fractS += fractS >> 7;
int imageT = t256 >> 8;
int imageTPlus1 = imageT + 1;
u32 fractT = t256 & 0xff;
fractT += fractT >> 7;
u8 sampledTex[4];
u32 texel[4];
WrapCoord(imageS, tm0.wrap_s, ti0.width);
WrapCoord(imageT, tm0.wrap_t, ti0.height);
WrapCoord(imageSPlus1, tm0.wrap_s, ti0.width);
WrapCoord(imageTPlus1, tm0.wrap_t, ti0.height);
TexDecoder_DecodeTexel(sampledTex, imageSrc, imageS, imageT, ti0.width, ti0.format, texTlut.tmem_offset << 9, texTlut.tlut_format);
SetTexel(sampledTex, texel, (256 - fractS) * (256 - fractT));
TexDecoder_DecodeTexel(sampledTex, imageSrc, imageSPlus1, imageT, ti0.width, ti0.format, texTlut.tmem_offset << 9, texTlut.tlut_format);
AddTexel(sampledTex, texel, (fractS) * (256 - fractT));
TexDecoder_DecodeTexel(sampledTex, imageSrc, imageS, imageTPlus1, ti0.width, ti0.format, texTlut.tmem_offset << 9, texTlut.tlut_format);
AddTexel(sampledTex, texel, (256 - fractS) * (fractT));
TexDecoder_DecodeTexel(sampledTex, imageSrc, imageSPlus1, imageTPlus1, ti0.width, ti0.format, texTlut.tmem_offset << 9, texTlut.tlut_format);
AddTexel(sampledTex, texel, (fractS) * (fractT));
sample[0] = (u8)(texel[0] >> 16);
sample[1] = (u8)(texel[1] >> 16);
sample[2] = (u8)(texel[2] >> 16);
sample[3] = (u8)(texel[3] >> 16);
}
else
{
int imageS = int(s);
int imageT = int(t);
WrapCoord(imageS, tm0.wrap_s, ti0.width);
WrapCoord(imageT, tm0.wrap_t, ti0.height);
TexDecoder_DecodeTexel(sample, imageSrc, imageS, imageT, ti0.width, ti0.format, texTlut.tmem_offset << 9, texTlut.tlut_format);
}
}
}