GUITexturesHelper.cpp

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/****************************************************************************/
// Global storage for textures; manages and draws them
/****************************************************************************/
// SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
// Copyright (C) 2001-2011 DLR (http://www.dlr.de/) and contributors
/****************************************************************************/
//
//   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.
//
/****************************************************************************/


// ===========================================================================
// included modules
// ===========================================================================
#ifdef _MSC_VER
#include <windows_config.h>
#else
#include <config.h>
#endif

#include <cassert>
#include <iostream>
#include <fx.h>
#include <fx3d.h>
#include "GUITexturesHelper.h"
#include <utils/gui/globjects/GUIGlObject.h>

#ifdef _WIN32
#include <windows.h>
#endif

#include <GL/gl.h>

#ifdef CHECK_MEMORY_LEAKS
#include <foreign/nvwa/debug_new.h>
#endif // CHECK_MEMORY_LEAKS


// ===========================================================================
// definition of static variables
// ===========================================================================
bool gAllowTextures;


// ===========================================================================
// method definitions
// ===========================================================================
GUIGlID
GUITexturesHelper::add(FXImage* i) {
    GUIGlID id;
    glGenTextures(1, &id);
    glBindTexture(GL_TEXTURE_2D, id);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
                 i->getWidth(), i->getHeight(), 0,
                 GL_RGBA, GL_UNSIGNED_BYTE, i->getData());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
    glBindTexture(GL_TEXTURE_2D, 0);
    return id;
}


void
GUITexturesHelper::drawTexturedBox(unsigned int which, SUMOReal size) {
    drawTexturedBox(which, size, size, -size, -size);
}


void
GUITexturesHelper::drawTexturedBox(unsigned int which,
                                   SUMOReal sizeX1, SUMOReal sizeY1,
                                   SUMOReal sizeX2, SUMOReal sizeY2) {
    if (!gAllowTextures) {
        return;
    }
    glEnable(GL_TEXTURE_2D);
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    glDisable(GL_CULL_FACE);
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_LIGHTING);
    glDisable(GL_COLOR_MATERIAL);
    glDisable(GL_TEXTURE_GEN_S);
    glDisable(GL_TEXTURE_GEN_T);
    glDisable(GL_ALPHA_TEST);
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
    glBindTexture(GL_TEXTURE_2D, which);
    glBegin(GL_TRIANGLE_STRIP);
    glTexCoord2f(0, 1);
    glVertex2d(sizeX1, sizeY1);
    glTexCoord2f(0, 0);
    glVertex2d(sizeX1, sizeY2);
    glTexCoord2f(1, 1);
    glVertex2d(sizeX2, sizeY1);
    glTexCoord2f(1, 0);
    glVertex2d(sizeX2, sizeY2);
    glEnd();
    glBindTexture(GL_TEXTURE_2D, 0);
    glEnable(GL_DEPTH_TEST);
}


/****************************************************************************/