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/*
* glshape.h - Paint 2D shapes in OpenGL
*
* Written: 7/16/02 - JSF
*
* Copyright (C) 2002 The Exult Team
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef GLSHAPE_H
#define GLSHAPE_H 1
#ifdef HAVE_OPENGL
class Xform_palette;
class Shape_frame;
class GL_texshape;
class Image_buffer8;
/*
* A 2D shape is rendered by painting a quad with the shape as a texture.
*/
class GL_texshape
{
Shape_frame *frame; // Source for this (or null if it came
// from someplace else).
unsigned int texture; // Texture ID.
unsigned int texsize; // Width/ht of texture (power of 2).
// Least-recently used chain:
GL_texshape *lru_next, *lru_prev;
// Create from this source.
void create(Image_buffer8 *src, unsigned char *pal,
Xform_palette *xforms = 0, int xfcnt = 0);
public:
friend class GL_manager;
GL_texshape(Shape_frame *f, unsigned char *pal,
Xform_palette *xforms = 0, int xfcnt = 0);
GL_texshape(Image_buffer8 *src, unsigned char *pal);
~GL_texshape();
void paint(int px, int py); // Render at given position.
};
/*
* Handle OpenGL rendering.
*/
class GL_manager
{
static GL_manager *instance; // One one of these.
int scale; // Scale for drawing.
int max_texsize; // Largest size allowed.
GL_texshape *shapes; // Shapes in LRU chain.
int num_shapes;
unsigned char *palette; // 3*256 bytes (rgb).
public:
friend class GL_texshape;
GL_manager();
~GL_manager();
static GL_manager *get_instance()
{ return instance; }
void set_palette(unsigned char *pal)
{ delete palette; palette = pal; }
// Create from src (but don't add to
// chain).
GL_texshape *create(Image_buffer8 *src)
{ return new GL_texshape(src, palette); }
// Window was resized.
void resized(int new_width, int new_height, int new_scale);
// Paint a shape & create GL_shape
// for it if necessary.
void paint(Shape_frame *frame, int px, int py,
Xform_palette *xforms = 0, int xfcnt = 0);
};
#else
class GL_manager
{
public:
static GL_manager *get_instance()
{ return 0; }
};
#endif /* HAVE_OPENGL */
#endif /* GLSHAPE_H */
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