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alexbevi
GitHub Repository: alexbevi/BizHawk
 Path: blob/master/libmupen64plus/mupen64plus-video-rice/src/OGLCombinerTNT2.cpp
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/*

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Copyright (C) 2003 Rice1964

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This program is free software; you can redistribute it and/or

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modify it under the terms of the GNU General Public License

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as published by the Free Software Foundation; either version 2

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of the License, or (at your option) any later version.

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This program is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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GNU General Public License for more details.

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You should have received a copy of the GNU General Public License

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along with this program; if not, write to the Free Software

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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

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*/

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#include "OGLExtensions.h"

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#include "OGLCombinerTNT2.h"

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#include "OGLRender.h"

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#include "OGLGraphicsContext.h"

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#include "OGLTexture.h"

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//========================================================================

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COGLColorCombinerTNT2::COGLColorCombinerTNT2(CRender *pRender)

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:COGLColorCombiner4(pRender)

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{

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    m_bTNT2Supported=false;

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    delete m_pDecodedMux;

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    m_pDecodedMux = new COGLDecodedMux;

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    m_ppDecodedMux = &m_pDecodedMux;

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}

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bool COGLColorCombinerTNT2::Initialize(void)

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{

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    m_bTNT2Supported = false;

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    if( COGLColorCombiner4::Initialize() )

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    {

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        m_bSupportMultiTexture = true;

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        COGLGraphicsContext *pcontext = (COGLGraphicsContext *)(CGraphicsContext::g_pGraphicsContext);

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        if( pcontext->IsExtensionSupported("GL_NV_texture_env_combine4") )

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        {

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            m_bTNT2Supported = true;

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        }

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        else

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        {

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            DebugMessage(M64MSG_ERROR, "Your video card does not support OpenGL TNT2 extension combiner, you can only use the OpenGL Ext combiner functions");

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        }

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        return true;

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    }

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    return false;

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}

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//========================================================================

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void COGLColorCombinerTNT2::InitCombinerCycle12(void)

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{

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    if( !m_bOGLExtCombinerSupported )   { COGLColorCombiner4::InitCombinerCycle12(); return;}

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#ifdef DEBUGGER

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    if( debuggerDropCombiners )

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    {

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        m_vCompiledTNTSettings.clear();

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        m_dwLastMux0 = m_dwLastMux1 = 0;

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        debuggerDropCombiners = false;

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    }

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#endif

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    m_pOGLRender->EnableMultiTexture();

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    bool combinerIsChanged = false;

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    if( m_pDecodedMux->m_dwMux0 != m_dwLastMux0 || m_pDecodedMux->m_dwMux1 != m_dwLastMux1 || m_lastIndex < 0 )

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    {

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        combinerIsChanged = true;

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        m_lastIndex = CNvTNTCombiner::FindCompiledMux();

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        if( m_lastIndex < 0 )       // Can not found

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        {

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            m_lastIndex = CNvTNTCombiner::ParseDecodedMux();

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        }

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        m_dwLastMux0 = m_pDecodedMux->m_dwMux0;

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        m_dwLastMux1 = m_pDecodedMux->m_dwMux1;

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    }

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    m_pOGLRender->SetAllTexelRepeatFlag();

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    if( m_bCycleChanged || combinerIsChanged || gRDP.texturesAreReloaded || gRDP.colorsAreReloaded )

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    {

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        gRDP.texturesAreReloaded = false;

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        if( m_bCycleChanged || combinerIsChanged )

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        {

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            GenerateCombinerSettingConstants(m_lastIndex);

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            GenerateCombinerSetting(m_lastIndex);

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        }

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        else if( gRDP.colorsAreReloaded )

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        {

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            GenerateCombinerSettingConstants(m_lastIndex);

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        }

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        gRDP.colorsAreReloaded = false;

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    }

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}

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const char* COGLColorCombinerTNT2::GetOpStr(GLenum op)

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{

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    switch( op )

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    {

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    case GL_ADD:

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        return "MOD";

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    default:

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        return "ADD_SIGNED";

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    }

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}

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#ifdef DEBUGGER

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void COGLColorCombinerTNT2::DisplaySimpleMuxString(void)

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{

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    COGLColorCombiner::DisplaySimpleMuxString();

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    CNvTNTCombiner::DisplaySimpleMuxString();

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}

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#endif

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//========================================================================

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GLint COGLColorCombinerTNT2::RGBArgsMap[] =

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{

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    GL_ZERO,                        //MUX_0

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    GL_ZERO,                        //MUX_1

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    GL_PREVIOUS_EXT,                //MUX_COMBINED,

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    GL_TEXTURE0_ARB,                //MUX_TEXEL0,

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    GL_TEXTURE1_ARB,                //MUX_TEXEL1,

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    GL_CONSTANT_EXT,                //MUX_PRIM,

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    GL_PRIMARY_COLOR_EXT,           //MUX_SHADE,

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    GL_CONSTANT_EXT,                //MUX_ENV,

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    GL_PREVIOUS_EXT,                //MUX_COMBALPHA,

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    GL_TEXTURE0_ARB,                //MUX_T0_ALPHA,

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    GL_TEXTURE1_ARB,                //MUX_T1_ALPHA,

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    GL_CONSTANT_EXT,                //MUX_PRIM_ALPHA,

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    GL_PRIMARY_COLOR_EXT,           //MUX_SHADE_ALPHA,

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    GL_CONSTANT_EXT,                //MUX_ENV_ALPHA,

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    GL_CONSTANT_EXT,                //MUX_LODFRAC,

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    GL_CONSTANT_EXT,                //MUX_PRIMLODFRAC,

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    GL_ZERO,                        //MUX_K5

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    GL_ZERO                     //MUX_UNK

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};

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//========================================================================

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GLint COGLColorCombinerTNT2::MapRGBArgs(uint8 arg)

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{

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    return RGBArgsMap[arg&MUX_MASK];

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}

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GLint COGLColorCombinerTNT2::MapRGBArgFlags(uint8 arg)

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{

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    if( (arg & MUX_ALPHAREPLICATE) && (arg & MUX_COMPLEMENT) )

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    {

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        return GL_ONE_MINUS_SRC_ALPHA;

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    }

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    else if( (arg & MUX_ALPHAREPLICATE) )

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    {

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        if( arg == MUX_1 )

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            return GL_ONE_MINUS_SRC_ALPHA;

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        else

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            return GL_SRC_ALPHA;

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    }

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    else if(arg & MUX_COMPLEMENT || arg == MUX_1) 

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    {

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        return GL_ONE_MINUS_SRC_COLOR;

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    }

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    else

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        return GL_SRC_COLOR;

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}

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GLint COGLColorCombinerTNT2::MapAlphaArgs(uint8 arg)

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{

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    return RGBArgsMap[arg&MUX_MASK];

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}

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GLint COGLColorCombinerTNT2::MapAlphaArgFlags(uint8 arg)

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{

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    if(arg & MUX_COMPLEMENT || arg == MUX_1) 

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    {

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        return GL_ONE_MINUS_SRC_ALPHA;

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    }

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    else

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        return GL_SRC_ALPHA;

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}

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//========================================================================

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void COGLColorCombinerTNT2::GenerateCombinerSetting(int index)

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{

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    TNT2CombinerSaveType &res = m_vCompiledTNTSettings[index];

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    // Texture unit 0

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    COGLTexture* pTexture = g_textures[gRSP.curTile].m_pCOGLTexture;

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    COGLTexture* pTexture1 = g_textures[(gRSP.curTile+1)&7].m_pCOGLTexture;

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    if( pTexture )  m_pOGLRender->BindTexture(pTexture->m_dwTextureName, 0);

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    if( pTexture1 ) m_pOGLRender->BindTexture(pTexture1->m_dwTextureName, 1);

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    // Texture unit 0

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    pglActiveTexture(GL_TEXTURE0_ARB);

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    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE4_NV);

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    m_pOGLRender->EnableTexUnit(0,TRUE);

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    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, res.unit1.rgbOp);

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    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, res.unit1.alphaOp);

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    if( res.unit1.rgbOp == GL_SUBTRACT_ARB )

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    {

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, MapRGBArgs(res.unit1.rgbArg0^MUX_COMPLEMENT));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, MapRGBArgFlags(res.unit1.rgbArg0^MUX_COMPLEMENT));

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    }

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    else

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    {

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, MapRGBArgs(res.unit1.rgbArg0));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, MapRGBArgFlags(res.unit1.rgbArg0));

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    }

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    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, MapRGBArgs(res.unit1.rgbArg1));

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    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, MapRGBArgFlags(res.unit1.rgbArg1));

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    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, MapRGBArgs(res.unit1.rgbArg2));

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    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, MapRGBArgFlags(res.unit1.rgbArg2));

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    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE3_RGB_EXT, MapRGBArgs(res.unit1.rgbArg3));

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    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND3_RGB_EXT, MapRGBArgFlags(res.unit1.rgbArg3));

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    if( res.unit1.alphaOp == GL_SUBTRACT_ARB )

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    {

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, MapRGBArgs(res.unit1.alphaArg0^MUX_COMPLEMENT));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, MapAlphaArgFlags(res.unit1.alphaArg0^MUX_COMPLEMENT));

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    }

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    else

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    {

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, MapRGBArgs(res.unit1.alphaArg0));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, MapAlphaArgFlags(res.unit1.alphaArg0));

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    }

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    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, MapRGBArgs(res.unit1.alphaArg1));

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    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, MapAlphaArgFlags(res.unit1.alphaArg1));

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    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, MapRGBArgs(res.unit1.alphaArg2));

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    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, MapAlphaArgFlags(res.unit1.alphaArg2));

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    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE3_ALPHA_EXT, MapRGBArgs(res.unit1.rgbArg3));

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    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND3_ALPHA_EXT, MapAlphaArgFlags(res.unit1.rgbArg3));

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    pglActiveTexture(GL_TEXTURE1_ARB);

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    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE4_NV);

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    if( m_maxTexUnits > 1 && res.numOfUnits > 1 )

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    {

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        glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, res.unit2.rgbOp);

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        glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, res.unit2.alphaOp);

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, MapRGBArgs(res.unit2.rgbArg0));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, MapRGBArgFlags(res.unit2.rgbArg0));

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, MapRGBArgs(res.unit2.rgbArg1));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, MapRGBArgFlags(res.unit2.rgbArg1));

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, MapRGBArgs(res.unit2.rgbArg2));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, MapRGBArgFlags(res.unit2.rgbArg2));

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE3_RGB_EXT, MapRGBArgs(res.unit2.rgbArg3));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND3_RGB_EXT, MapRGBArgFlags(res.unit2.rgbArg3));

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, MapRGBArgs(res.unit2.alphaArg0));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, MapAlphaArgFlags(res.unit2.alphaArg0));

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, MapRGBArgs(res.unit2.alphaArg1));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, MapAlphaArgFlags(res.unit2.alphaArg1));

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, MapRGBArgs(res.unit2.alphaArg2));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, MapAlphaArgFlags(res.unit2.alphaArg2));

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        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE3_ALPHA_EXT, MapRGBArgs(res.unit2.alphaArg3));

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        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND3_ALPHA_EXT, MapAlphaArgFlags(res.unit2.alphaArg3));

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        m_pOGLRender->EnableTexUnit(1,TRUE);

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    }

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    else

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    {

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        //m_pOGLRender->EnableTexUnit(1,FALSE);

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    }

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}

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void COGLColorCombinerTNT2::GenerateCombinerSettingConstants(int index)

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{

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    TNT2CombinerSaveType &res = m_vCompiledTNTSettings[index];

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    for( int i=0; i<2; i++ )

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    {

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        float *fv;

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        pglActiveTextureARB(GL_TEXTURE0_ARB+i);

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        switch( res.units[i].constant & MUX_MASK )

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        {

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        case MUX_PRIM:

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            fv = GetPrimitiveColorfv();

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            glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,fv);

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            break;

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        case MUX_ENV:

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            fv = GetEnvColorfv();

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            glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,fv);

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            break;

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        case MUX_LODFRAC:

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            {

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                float frac = gRDP.LODFrac / 255.0f;

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                float tempf[4] = {frac,frac,frac,frac};

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                glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,tempf);

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                break;

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            }

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        case MUX_PRIMLODFRAC:

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            {

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                float frac = gRDP.primLODFrac / 255.0f;

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                float tempf[4] = {frac,frac,frac,frac};

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                glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,tempf);

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                break;

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            }

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        }

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    }

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}

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