/***************************************************************************

  GLpixelOperations.c

  The Gambas openGL component

  (c) 2005-2007 Laurent Carlier <lordheavy@users.sourceforge.net>
                Benoît Minisini <gambas@users.sourceforge.net>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 1, or (at your option)
  any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

***************************************************************************/

#define __GLPIXELOPERATIONS_C

#include "gambas.h"
#include "gb_common.h"
#include "main.h"

#include <GL/gl.h>

BEGIN_METHOD(GLCOPYPIXELS, GB_INTEGER x; GB_INTEGER y; GB_INTEGER width; GB_INTEGER height; GB_INTEGER type)

	glCopyPixels(VARG(x), VARG(y), VARG(width), VARG(height), VARG(type));

END_METHOD

BEGIN_METHOD(GLPIXELSTOREF, GB_INTEGER pname; GB_FLOAT param)

	glPixelStoref(VARG(pname), VARG(param));

END_METHOD

BEGIN_METHOD(GLPIXELSTOREI, GB_INTEGER pname; GB_INTEGER param)

	glPixelStorei(VARG(pname), VARG(param));

END_METHOD

BEGIN_METHOD(GLPIXELTRANSFERF, GB_INTEGER pname; GB_FLOAT param)

	glPixelTransferf(VARG(pname), VARG(param));

END_METHOD

BEGIN_METHOD(GLPIXELTRANSFERI, GB_INTEGER pname; GB_INTEGER param)

	glPixelTransferi(VARG(pname), VARG(param));

END_METHOD

BEGIN_METHOD(GLREADBUFFER, GB_INTEGER mode)

	glReadBuffer(VARG(mode));

END_METHOD

BEGIN_METHOD(GLDRAWPIXELS, GB_OBJECT Image)

	GB_IMAGE *image = VARG(Image);
	GB_IMAGE_INFO info;
	GLint format = 0;

	GB.Image.Info(image, &info);

	if ((info.format == GB_IMAGE_RGBA) || (info.format == GB_IMAGE_RGBX))
		format = GL_RGBA;

	// is it good ?
	if ((info.format == GB_IMAGE_BGRA) || (info.format == GB_IMAGE_BGRX))
		format = GL_BGRA;

	glDrawPixels(info.width, info.height, format, GL_UNSIGNED_BYTE, info.data);

END_METHOD