--- /dev/null
+/******************************************************************************
+ * Arachnoid Graphics Plugin for Mupen64Plus
+ * http://bitbucket.org/wahrhaft/mupen64plus-video-arachnoid/
+ *
+ * Copyright (C) 2007 Kristofer Karlsson, Rickard Niklasson
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *****************************************************************************/
+
+#include "SimpleTexEnvCombiner.h"
+#include "CombinerStructs.h"
+#include "MultiTexturingExt.h"
+#include "ExtensionChecker.h"
+#include "m64p.h"
+#include "OpenGL.h"
+
+//-----------------------------------------------------------------------------
+//! Constructor
+//-----------------------------------------------------------------------------
+SimpleTexEnvCombiner::SimpleTexEnvCombiner()
+{
+}
+
+//-----------------------------------------------------------------------------
+//! Destructor
+//-----------------------------------------------------------------------------
+SimpleTexEnvCombiner::~SimpleTexEnvCombiner()
+{
+}
+
+//-----------------------------------------------------------------------------
+//* Initialize
+//! Checks if multitexturing is supported
+//-----------------------------------------------------------------------------
+void SimpleTexEnvCombiner::initialize()
+{
+ ARB_multitexture = isExtensionSupported("GL_ARB_multitexture");
+}
+
+//-----------------------------------------------------------------------------
+//* Begin Texture Update
+//! Called before texture channels are updated on the RDP
+//-----------------------------------------------------------------------------
+void SimpleTexEnvCombiner::beginTextureUpdate()
+{
+ //Ignore?
+}
+
+//-----------------------------------------------------------------------------
+//* End Texture Update
+//! Called after texture channels are updated on the RDP
+//! @param[in] texEnv Texture Environment
+//-----------------------------------------------------------------------------
+void SimpleTexEnvCombiner::endTextureUpdate(TexEnvCombiner* texEnv)
+{
+ //Ignore
+}
+
+//-----------------------------------------------------------------------------
+//! Set Texture Envirorment Colors
+//! @param[in] texEnv Texture Environment
+//-----------------------------------------------------------------------------
+void SimpleTexEnvCombiner::setTextureEnviromentColors(TexEnvCombiner* texEnv)
+{
+ //Ignore
+}
+
+//-----------------------------------------------------------------------------
+//* Set Texture Environment
+//! Enables texturing and sets texture environment in OpenGL
+//! @param[in] texEnv Texture Environment
+//-----------------------------------------------------------------------------
+void SimpleTexEnvCombiner::setTextureEnviroment(TexEnvCombiner* texEnv)
+{
+ if ( ARB_multitexture )
+ glActiveTextureARB( GL_TEXTURE0_ARB );
+
+ if (texEnv->usesT0 || texEnv->usesT1)
+ glEnable( GL_TEXTURE_2D );
+ else
+ glDisable( GL_TEXTURE_2D );
+
+ //Set Mode
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, texEnv->mode);
+}
+
+//-----------------------------------------------------------------------------
+//* Create New Texture Enviornment
+//! Allocates a new texture enviroment
+//! @param[in] colorCombiner How to combine and get a color
+//! @param[in] alphaCombiner How to combine and get an alpha value
+//! @return The texture enviroment that was created
+//-----------------------------------------------------------------------------
+TexEnvCombiner* SimpleTexEnvCombiner::createNewTextureEnviroment(Combiner* colorCombiner, Combiner *alphaCombiner)
+{
+ TexEnvCombiner* texEnv = new TexEnvCombiner();
+
+ bool m_usesTexture0 = false;
+ bool m_usesTexture1 = false;
+ int mode = GL_REPLACE;
+ unsigned short m_color = COMBINED;
+ unsigned short m_alpha = COMBINED;
+
+ //For each stage in alpha combiner
+ for (int i = 0; i < alphaCombiner->numStages; i++)
+ {
+ //For each operation in stage
+ for (int j = 0; j < alphaCombiner->stage[i].numOps; j++)
+ {
+ CombinerOp* op = &alphaCombiner->stage[i].op[j];
+
+ //Apply operation
+ switch ( alphaCombiner->stage[i].op[j].op )
+ {
+ case LOAD:
+ if ( op->param1 != TEXEL0_ALPHA && op->param1 != TEXEL1_ALPHA )
+ {
+ m_alpha = op->param1;
+ m_usesTexture0 = false;
+ m_usesTexture1 = false;
+ }
+ else
+ {
+ mode = GL_REPLACE;
+ m_usesTexture0 = op->param1 == TEXEL0_ALPHA;
+ m_usesTexture1 = op->param1 == TEXEL1_ALPHA;
+ }
+ break;
+ case MUL: {
+ CombinerOp* prevOp = &alphaCombiner->stage[i].op[j-1];
+
+ if (((op->param1 == TEXEL0_ALPHA) || (op->param1 == TEXEL1_ALPHA)) &&
+ ((prevOp->param1 != TEXEL0_ALPHA) || (prevOp->param1 != TEXEL1_ALPHA)))
+ {
+ mode = GL_MODULATE;
+ }
+ else if ( ( op->param1 != TEXEL0_ALPHA || op->param1 != TEXEL1_ALPHA) &&
+ (prevOp->param1 == TEXEL0_ALPHA || prevOp->param1 == TEXEL1_ALPHA) )
+ {
+ m_alpha = op->param1;
+ mode = GL_MODULATE;
+ }
+ }
+ break;
+ }
+ }
+ }
+
+
+ //For each stage in colorCombiner
+ for (int i = 0; i < colorCombiner->numStages; i++)
+ {
+ for (int j = 0; j < colorCombiner->stage[i].numOps; j++)
+ {
+ CombinerOp* op = &colorCombiner->stage[i].op[j];
+
+ switch ( colorCombiner->stage[i].op[j].op )
+ {
+ case LOAD:
+ if (op->param1 == TEXEL0 || op->param1 == TEXEL0_ALPHA)
+ {
+ if ( mode == GL_MODULATE )
+ m_color = ONE;
+
+ m_usesTexture0 = true;
+ m_usesTexture1 = false;
+ }
+ else if ( op->param1 == TEXEL1 || op->param1 == TEXEL1_ALPHA )
+ {
+ if ( mode == GL_MODULATE )
+ m_color = ONE;
+
+ m_usesTexture0 = false;
+ m_usesTexture1 = true;
+ }
+ else
+ {
+ m_color = op->param1;
+ m_usesTexture0 = m_usesTexture1 = false;
+ }
+ break;
+ case MUL:
+ if ( op->param1 == TEXEL0 || op->param1 == TEXEL0_ALPHA )
+ {
+ if (!m_usesTexture0 && !m_usesTexture1)
+ {
+ mode = GL_MODULATE;
+ m_usesTexture0 = true;
+ m_usesTexture1 = false;
+ }
+ }
+ else if ( op->param1 == TEXEL1 || op->param1 == TEXEL1_ALPHA )
+ {
+ if (!m_usesTexture0 && !m_usesTexture1)
+ {
+ mode = GL_MODULATE;
+ m_usesTexture0 = false;
+ m_usesTexture1 = true;
+ }
+ }
+ else if ( m_usesTexture0 || m_usesTexture1 )
+ {
+ mode = GL_MODULATE;
+ m_color = op->param1;
+ }
+ break;
+ case INTERPOLATE:
+ if ((op->param1 == TEXEL0) &&
+ ((op->param2 != TEXEL0) && (op->param2 != TEXEL0_ALPHA) &&
+ (op->param2 != TEXEL1) && (op->param2 != TEXEL1_ALPHA)) &&
+ (op->param3 == TEXEL0_ALPHA))
+ {
+ mode = GL_DECAL;
+ m_color = op->param2;
+ m_usesTexture0 = true;
+ m_usesTexture1 = false;
+ }
+ else if ((op->param1 == TEXEL0) &&
+ ((op->param2 != TEXEL0) && (op->param2 != TEXEL0_ALPHA) &&
+ (op->param2 != TEXEL1) && (op->param2 != TEXEL1_ALPHA)) &&
+ (op->param3 == TEXEL0_ALPHA))
+ {
+ mode = GL_DECAL;
+ m_color = op->param2;
+ m_usesTexture0 = false;
+ m_usesTexture1 = true;
+ }
+ break;
+ }
+ }
+ }
+
+ texEnv->usesT0 = m_usesTexture0;
+ texEnv->usesT1 = m_usesTexture1;
+ texEnv->mode = mode;
+ texEnv->vertex.color = m_color;
+ texEnv->vertex.alpha = m_alpha;
+ return texEnv;
+}
notaz.gp2x.de / mupen64plus-pandora.git / blobdiff