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/*
* pdp system module - texture packet type
* Copyright (c) by Tom Schouten <tom@zwizwa.be>
*
* 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 2 of the License, 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.
*
*/
#ifndef PDP_TEXTURE_H
#define PDP_TEXTURE_H
//#include <GL/gl.h>
//#include <GL/glu.h>
//#include <GL/glx.h>
//#include <GL/glut.h>
#include "pdp.h"
/* TEXTURE PACKET */
typedef struct
{
u32 tex_obj; /* gl texture object */
s32 format; /* texture format */
u32 width; /* dims */
u32 height;
u32 sub_width; /* portion of texture used */
u32 sub_height;
} t_texture;
#define PDP_TEXTURE 4 /* opengl texture object */
/* all symbols are C-style */
#ifdef __cplusplus
extern "C"
{
#endif
/* check if valid texture packet. all other methods assume packet is valid */
int pdp_packet_texture_isvalid(int packet);
/* returns a pointer to the packet subheader whem the packet contains a texture */
/* try not to use the header directly, use clone and copy methods instead */
t_texture *pdp_packet_texture_info(int packet);
/* texture constructors */
int pdp_packet_new_texture(u32 width, u32 height, s32 format); /* create a texture packet */
/* texture operators */
void pdp_packet_texture_make_current(int packet); /* make a texture the current texture context */
u32 pdp_packet_texture_total_width(int packet); /* width of texture */
u32 pdp_packet_texture_total_height(int packet); /* get heigth of texture */
u32 pdp_packet_texture_sub_width(int packet); /* width of subtexture */
u32 pdp_packet_texture_sub_height(int packet); /* heigth of subtexture */
float pdp_packet_texture_fracx(int packet); /* x fraction */
float pdp_packet_texture_fracy(int packet); /* y fraction */
float pdp_packet_texture_sub_aspect(int packet);
/* some utility methods */
void pdp_packet_texture_make_current_enable(int packet); /* make current & enable with default texture settings (for the lazy)*/
void pdp_packet_texture_setup_2d_context(int packet); /* set up 2d context (viewport, projection, modelview) from texture dims */
#ifdef __cplusplus
}
#endif
#endif //PDP_TEXTURE_H
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