utils.c

#include "config.h"

#include "utils.h"

#include "vmath.h"

#include "glew.h"
#include "SDL.h"
#include "SDL_image.h"

public void glVertexf(Vec4f p)
{
    glVertex3fv(&p[0]);
}

public void glVertexi(Vec4i p)
{
    glVertex3iv(&p[0]);
}

public void glTexCoordf(Vec2f p)
{
    glTexCoord2fv(&p[0]);
}

public void glTranslatev(Vec4f p)
{
    glTranslatef(p[0],p[1],p[2]);
}

public GLuint emptyTexture(int width, int height)
{

    int data[width*height];

    GLuint texture;
    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    glTexImage2D(GL_TEXTURE_2D,
         0,
         GL_RGBA,
         width,height,
         0,
         GL_RGBA,
         GL_UNSIGNED_BYTE,
         data);

    return texture;

}

public GLuint loadTexture(const char* filename)
{

    SDL_Surface *surface=IMG_Load(filename);

    if ( surface == NULL ) {
        return 0;
    }

    GLuint texture;
    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    glTexImage2D(GL_TEXTURE_2D,
             0,
             GL_RGBA,
             surface->w, surface->h,
             0,
             GL_RGBA,
             GL_UNSIGNED_BYTE,
             surface->pixels);

    SDL_FreeSurface(surface);

    return texture;

}