#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <string.h>

#include <SDL.h>
#include <SDL_opengl.h>

#include <pango/pango.h>
#include <pango/pangoft2.h>

static PangoContext *context;
static PangoFontMap *fontmap;

MODULE = Crossfire::Client	PACKAGE = Crossfire::Client

BOOT:
{
	fontmap = pango_ft2_font_map_new ();
	context = pango_context_new ();
	pango_context_set_font_map (context, fontmap);
}

char *
gl_version ()
	CODE:
        RETVAL = (char *)glGetString (GL_VERSION);
	OUTPUT:
        RETVAL

char *
gl_extensions ()
	CODE:
        RETVAL = (char *)glGetString (GL_EXTENSIONS);
	OUTPUT:
        RETVAL

void
font_render (SV *text_, int height = 10)
	PPCODE:
{
	STRLEN textlen;
        char *text = SvPVutf8 (text_, textlen);
        SV *retval;
        int w, h;
        FT_Bitmap bitmap;
	PangoLayout *layout;
	PangoFontDescription *font = pango_context_get_font_description (context);
        pango_font_description_set_absolute_size (font, height * PANGO_SCALE);

        layout = pango_layout_new (context);
        pango_layout_set_markup (layout, text, textlen);
        pango_layout_get_pixel_size (layout, &w, &h);

        w = (w + 3) & ~3;
        if (!w) w = 1;
        if (!h) h = 1;

        retval = newSV (w * h);
        SvPOK_only (retval);
        SvCUR_set (retval, w * h);

        bitmap.rows       = h;
        bitmap.width      = w;
        bitmap.pitch      = w;
        bitmap.buffer     = (unsigned char*)SvPVX (retval);
        bitmap.num_grays  = 256;
        bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;

        memset (bitmap.buffer, 0, w * h);
            
        pango_ft2_render_layout (&bitmap, layout, 0 * PANGO_SCALE, 0 * PANGO_SCALE);
        g_object_unref (layout);

        EXTEND (SP, 3);
        PUSHs (sv_2mortal (newSViv (w)));
        PUSHs (sv_2mortal (newSViv (h)));
        PUSHs (sv_2mortal (retval));
}