/*
  bufferedfont.c

  A basic test for buffered font rendering. Buffered font
  rendering allows the developer to pre-render a string of 
  text or character set into bitmaps which can then be 
  drawn into the scene through various methods. (texture
  maps, direct writes, extrusion, etc.)
*/

#define CPWDLL_EXTERN
#include <cpw.h>

/* handy window characteristics holder */

static CpwWindowInfo windowInfo = { 0,100,100,400,200 }; /* id,posx,posy,w,h */
static char * testString = "AbcJji!@#$%^*;[1]{1}|";

static CpwFontFace font1;
static CpwFontFace font2;
static CpwFontFace font3;

static CpwFontBuffer cpwbuffer;

/****************************************************/
/*  OpenGL 2D Matrix Setup                          */
/****************************************************/

void set2DMatrix( void ) 
{
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    gluOrtho2D( 0, windowInfo.width, 0, windowInfo.height );
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();
}

/****************************************************/
/*  OpenGL 3D Matrix Setup                          */
/****************************************************/

void set3DMatrix( void ) 
{
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    gluPerspective( 60, windowInfo.width / windowInfo.height, 1, 100 );
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();
}

/****************************************************/
/*  Draw Window One                                 */
/****************************************************/

void drawWindowOne( pCpw cpw ) 
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    set2DMatrix();

    /* draw something in the window with OpenGL */

    glPushMatrix();

    glRasterPos2d( 1, 1 );

    /* draw the bufferd font into the frame buffer */

    glDrawPixels( cpwbuffer.w, cpwbuffer.h, cpwbuffer.glformat, GL_UNSIGNED_BYTE, cpwbuffer.data );

    glRasterPos2d( 1, 40 );

    /* draw the same string using cpwDrawFont */

    cpwDrawFont( cpw, font1, testString, 1 );

    glRasterPos2d( 1, 80 );

    /* draw the same string using cpwDrawFont */

    cpwDrawFont( cpw, font2, testString, 1 );

    glRasterPos2d( 1, 120 );

    /* draw the same string using cpwDrawFont */

    cpwDrawFont( cpw, font3, testString, 1 );

    glPopMatrix();
}

/****************************************************/
/*  Window Draw Event callback                      */
/****************************************************/

void draw( pCpw cpw, uint_32 winid )
{
    drawWindowOne( cpw );
    cpwSwapWindowBuffers( cpw, winid );
}

/****************************************************/
/*  Window Create / Destroy Event callback          */
/****************************************************/

void window( pCpw cpw, uint_32 winid, bool flag )
{
    /* creation event */

    if ( flag == true ) {

        glShadeModel( GL_SMOOTH );
        glDepthFunc( GL_LEQUAL );
        glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
        glEnable( GL_LINE_SMOOTH );
        glEnable( GL_POLYGON_SMOOTH );
        glClearColor( 0.0, 0.0, 0.0, 1.0 );
        return;
    }

    /* window close event */

    if ( flag == false ) {
        cpwDestroyWindow( cpw, winid );
        return;
    }
}

/****************************************************/
/*  Window Resize Event callback                    */
/****************************************************/

void reshape( pCpw cpw, uint_32 winid, uint_32 width, uint_32 height )
{
    if ( height == 0 ) { height = 1; }
    if ( width == 0 )  { width = 1; }

    windowInfo.width = width;
    windowInfo.height = height;

    set2DMatrix();

    glViewport( 0, 0, width, height );
}


/****************************************************/
/*  Main                                            */
/****************************************************/

int main(int argc, char* argv[])
{
    pCpw cpw = null;

    /****************************************************/
    /*  Init                                            */
    /****************************************************/

    cpwInitContext( &cpw );

    /****************************************************/
    /*  Creaing Windows                                 */
    /****************************************************/
    
    windowInfo.id = 
    cpwCreateWindowEx( cpw, "Buffered Font", windowInfo.x, windowInfo.y, 
                             windowInfo.width, windowInfo.height );

    /****************************************************/
    /*  Event Callbacks                                 */
    /****************************************************/

    cpwCreateCallback( cpw, window );
    cpwDisplayCallback( cpw, draw );
    cpwReshapeCallback( cpw, reshape );

    /****************************************************/
    /*  Fonts                                           */
    /****************************************************/

    glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
    glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );

    cpwFontMode( cpw, CPW_FONTOPT_PIXELMAP, 0 );
    cpwFontMode( cpw, CPW_FONTOPT_ALIGNLEFT, 0 );
    cpwFontMode( cpw, CPW_FONTOPT_SIZE, 30 );
    cpwFontMode( cpw, CPW_FONTOPT_KERN, 1 );
    cpwFontMode( cpw, CPW_FONTOPT_PIXELMAP_GLFORMAT, GL_RGB );
    //cpwFontMode( cpw, CPW_FONTOPT_PIXELMAP_GLFORMAT, GL_RGBA );
    //cpwFontMode( cpw, CPW_FONTOPT_PIXELMAP_GLFORMAT, GL_LUMINANCE );
    cpwFontMode( cpw, CPW_FONTOPT_LAYOUTDEBUG, 0 );
    cpwFontMode( cpw, CPW_FONTOPT_SPACING, 1 );

    glColor3f( 0.0, 1.0, 0.0 );

    font1 = cpwLoadFont( cpw, "times.ttf", CPW_FONTLOC_HOST, "", "" );
    font2 = cpwLoadFont( cpw, "arial.ttf", CPW_FONTLOC_HOST, "", "" );
    font3 = cpwLoadFont( cpw, "cour.ttf", CPW_FONTLOC_HOST, "", "" );

    /* pre-render our font string into a buffer */

    cpwDrawBufferedFont( cpw, font1, testString, &cpwbuffer );

    /****************************************************/
    /*  MainLoop                                        */
    /****************************************************/

    cpwMainLoop( cpw );

    /****************************************************/
    /*  Exit and Free                                   */
    /****************************************************/

    /* free the font buffer */

    cpwFreeBufferedFont( cpw, &cpwbuffer );

    cpwFreeContext( &cpw );

    return 0;
}