OpenGL Texture using SDL and FreeImage

#include <SDL2/SDL.h>
#include <SDL2/SDL_opengl.h>
#include <FreeImage.h>

#include <stdio.h>

int main( int argc, char *argv[] )
{
    SDL_Init( SDL_INIT_EVERYTHING );
    FreeImage_Initialise();

    SDL_Window *window = NULL;
    unsigned int windowWidth = 640;
    unsigned int windowHeight = 480;
    SDL_GLContext context = NULL;

    window = SDL_CreateWindow( "Test",
                   SDL_WINDOWPOS_UNDEFINED,
                   SDL_WINDOWPOS_UNDEFINED,
                   windowWidth,
                   windowHeight,
                   SDL_WINDOW_OPENGL );
    context = SDL_GL_CreateContext( window );

    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    glOrtho( 0, windowWidth, windowHeight, 0, -1, 1 );
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();

    glEnable( GL_TEXTURE_2D );
    glEnable( GL_DEPTH_TEST );

    const char *filename = "rockstar.jpg";
    FREE_IMAGE_FORMAT fif = FIF_UNKNOWN;
    fif = FreeImage_GetFileType( filename, 0 );
    if ( fif == FIF_UNKNOWN )
        fprintf( stderr, "Couldn't get the file type!" );
    FIBITMAP *bitmap = FreeImage_Load( fif, filename );
    if ( !bitmap )
        fprintf( stderr, "Couldn't load the image!" );

    unsigned int imageWidth = 0;
    unsigned int imageHeight = 0;
    BYTE *imageBits = 0;

    imageWidth = FreeImage_GetWidth(bitmap);
    imageHeight = FreeImage_GetHeight(bitmap);
    imageBits = FreeImage_GetBits(bitmap);
    fprintf( stdout, "%u %u %p\n", imageWidth, imageHeight, imageBits );

    GLuint texId;
    glGenTextures( 1, &texId );
    glBindTexture( GL_TEXTURE_2D, texId );
    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, imageWidth,
                imageHeight, 0, GL_RGB,
                GL_UNSIGNED_BYTE, imageBits );

    if ( bitmap )
        FreeImage_Unload( bitmap );

    bool running = true;
    while ( running ) {
        SDL_Event event;
        while ( SDL_PollEvent(&event) )
            if ( event.type == SDL_QUIT )
                running = false;
        glBindTexture( GL_TEXTURE_2D, texId );
        glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
        glBegin( GL_QUADS );
        glTexCoord2f( 0.0f, 1.0f ); glVertex2f( 0.0f, 0.0f );
        glTexCoord2f( 1.0f, 1.0f ); glVertex2f( imageWidth, 0.0f );
        glTexCoord2f( 1.0f, 0.0f ); glVertex2f( imageWidth, imageHeight );
        glTexCoord2f( 0.0f, 0.0f ); glVertex2f( 0.0f, imageHeight );
        glEnd();

        SDL_GL_SwapWindow( window );
        SDL_Delay( 16 );
    }

    SDL_GL_DeleteContext( context );
    SDL_DestroyWindow( window );

    FreeImage_DeInitialise();
    SDL_Quit();
}