tibia-client/src/graphics.cpp

/* The MIT License
 *
 * Copyright (c) 2010 OTClient, https://github.com/edubart/otclient
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */


#include "graphics.h"
#include "logger.h"

#include <GL/gl.h>
#include <GL/glu.h>
#include "texture.h"

Graphics g_graphics;

Graphics::Graphics()
{

}

Graphics::~Graphics()
{

}

void Graphics::init()
{
    // setup opengl
    glEnable(GL_ALPHA_TEST); // enable alpha by default
    glAlphaFunc(GL_GREATER, 0.0f); // default alpha mode
    glDisable(GL_DEPTH_TEST); // we are rendering 2D only, we don't need it
    glEnable(GL_TEXTURE_2D); // enable textures by default

    notice("GPU %s", (const char*)glGetString(GL_RENDERER));
    notice("OpenGL %s", (const char*)glGetString(GL_VERSION));
}

void Graphics::terminate()
{

}

void Graphics::resize(int width, int height)
{
    m_width = width;
    m_height = height;
    restoreViewport();
}

void Graphics::restoreViewport()
{
    // resize gl viewport
    glViewport(0, 0, m_width, m_height);

    /*
     0,0---------0,w
     |           |
     |           |
     |           |
     h,0---------h,w
     */
    // setup view region like above
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0.0f, m_width, m_height, 0.0f);

    // back to model view
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}

void Graphics::beginRender()
{
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    glLoadIdentity();
}

void Graphics::endRender()
{

}