147 lines
3.8 KiB
C
147 lines
3.8 KiB
C
/*
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* PVVMUD a 3D MUD
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* Copyright (C) 1998-1999 Programvareverkstedet (pvv@pvv.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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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*/
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#include "pvvmud.H"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "gltexture.H"
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#ifdef HAVE_GL_GLUT_H
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#include <GL/glut.h>
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#endif /* HAVE_GL_GLUT_H */
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static GLboolean HaveTexObj = GL_FALSE;
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#if defined(GL_VERSION_1_1)
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# define TEXTURE_OBJECT 1
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#elif defined(GL_EXT_texture_object)
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# define TEXTURE_OBJECT 1
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# define glBindTexture(A,B) glBindTextureEXT(A,B)
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# define glGenTextures(A,B) glGenTexturesEXT(A,B)
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# define glDeleteTextures(A,B) glDeleteTexturesEXT(A,B)
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#endif
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void GLTexture_Init(){
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/* check that renderer has the GL_EXT_texture_object extension
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* or supports OpenGL 1.1
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*/
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#ifdef TEXTURE_OBJECT
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char *exten = (char *) glGetString( GL_EXTENSIONS );
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char *version = (char *) glGetString( GL_VERSION );
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if ( strstr( exten, "GL_EXT_texture_object" )
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|| strncmp( version, "1.1", 3 )==0 ) {
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HaveTexObj = GL_TRUE;
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}
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#endif
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}
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/******************************************************************************
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*
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* Construct texture with given id
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*
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*****************************************************************************/
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CGLTexture::CGLTexture(int textureId):CTexture(textureId){
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}
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/******************************************************************************
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*
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* Destruct texture
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*
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*****************************************************************************/
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CGLTexture::~CGLTexture(){
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#ifdef TEXTURE_OBJECT
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if (loaded())
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glDeleteTextures( 1, &texObj );
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#endif
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}
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/******************************************************************************
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*
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* Set texturemap to use with texture
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*
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*****************************************************************************/
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void CGLTexture::setTextureMap(CTextureMap * textureMap){
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/* generate texture object IDs */
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if (HaveTexObj) {
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#ifdef TEXTURE_OBJECT
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glGenTextures( 1, &texObj );
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#endif
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}
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else {
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texObj = glGenLists(1);
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}
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/* setup texture object */
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if (HaveTexObj) {
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#ifdef TEXTURE_OBJECT
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glBindTexture( GL_TEXTURE_2D, texObj );
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#endif
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}
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else {
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glNewList( texObj, GL_COMPILE );
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}
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
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glTexImage2D( GL_TEXTURE_2D, 0, 4, textureMap->getWidth(),
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textureMap->getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE,
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textureMap->getData() );
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if (!HaveTexObj) {
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glEndList();
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}
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/* end of texture object */
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CTexture::setTextureMap(textureMap);
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}
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/******************************************************************************
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*
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* Exec texture
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*
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*****************************************************************************/
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int CGLTexture::exec(){
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if (!loaded()) return FALSE;
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if (HaveTexObj) {
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#ifdef TEXTURE_OBJECT
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glBindTexture( GL_TEXTURE_2D, texObj );
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#endif
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}
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else {
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glCallList( texObj );
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}
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return TRUE;
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}
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