nkeynes@635: /**
nkeynes@635:  * $Id$
nkeynes@635:  *
nkeynes@662:  * Common GL code that doesn't depend on a specific implementation
nkeynes@635:  *
nkeynes@635:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@635:  *
nkeynes@635:  * This program is free software; you can redistribute it and/or modify
nkeynes@635:  * it under the terms of the GNU General Public License as published by
nkeynes@635:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@635:  * (at your option) any later version.
nkeynes@635:  *
nkeynes@635:  * This program is distributed in the hope that it will be useful,
nkeynes@635:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@635:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@635:  * GNU General Public License for more details.
nkeynes@635:  */
nkeynes@635: 
nkeynes@736: #ifndef lxdream_video_gl_H
nkeynes@736: #define lxdream_video_gl_H 1
nkeynes@736: 
nkeynes@736: #ifdef __cplusplus
nkeynes@736: extern "C" {
nkeynes@736: #endif
nkeynes@635: 
nkeynes@1236: extern uint32_t video_width, video_height;
nkeynes@1236: 
nkeynes@1236: /**
nkeynes@1236:  * Set the video size used by the frame blits
nkeynes@1236:  */
nkeynes@1236: void gl_set_video_size( uint32_t width, uint32_t height );
nkeynes@1236: 
nkeynes@635: /**
nkeynes@635:  * Generic GL routine to draw the given frame buffer into a texture
nkeynes@635:  */
nkeynes@635: gboolean gl_load_frame_buffer( frame_buffer_t frame, int tex_id );
nkeynes@635: 
nkeynes@635: /**
nkeynes@669:  * Reset the GL state to its initial values
nkeynes@669:  */
nkeynes@669: void gl_reset_state();
nkeynes@669: 
nkeynes@669: /**
nkeynes@635:  * Generic GL routine to blank the display view with the specified colour.
nkeynes@635:  */
nkeynes@669: void gl_display_blank( uint32_t colour );
nkeynes@635: 
nkeynes@635: /**
nkeynes@1222:  * Write a rectangular texture (GL_TEXTURE_2D) to the display frame
nkeynes@635:  */
nkeynes@635: void gl_display_render_buffer( render_buffer_t buffer );
nkeynes@635: 
nkeynes@635: /**
nkeynes@1222:  * Write a rectangular texture (GL_TEXTURE_2D) to the display frame
nkeynes@635:  */
nkeynes@635: void gl_texture_window( int width, int height, int tex_id, gboolean inverted );
nkeynes@635: 
nkeynes@635: /**
nkeynes@854:  * Convert window coordinates to dreamcast device coords (640x480) using the 
nkeynes@854:  * same viewable area as gl_texture_window.
nkeynes@854:  * If the coordinates are outside the viewable area, the result is -1,-1.
nkeynes@854:  */ 
nkeynes@854: void gl_window_to_system_coords( int *x, int *y );
nkeynes@854: 
nkeynes@854: /**
nkeynes@635:  * Generic GL read_render_buffer. This function assumes that the caller
nkeynes@635:  * has already set the appropriate glReadBuffer(); in other words, unless
nkeynes@635:  * there's only one buffer this needs to be wrapped.
nkeynes@635:  */
nkeynes@635: gboolean gl_read_render_buffer( unsigned char *target, render_buffer_t buffer, 
nkeynes@736:                                 int rowstride, int colour_format );
nkeynes@635: 
nkeynes@635: 
nkeynes@635: /****** FBO handling (gl_fbo.c) ******/
nkeynes@635: gboolean gl_fbo_is_supported();
nkeynes@635: void gl_fbo_shutdown();
nkeynes@635: void gl_fbo_init( display_driver_t driver );
nkeynes@635: void gl_fbo_detach();
nkeynes@635: 
nkeynes@1159: /** VBO/VAR handling (gl_vbo.c) ******/
nkeynes@1159: void gl_vbo_init( display_driver_t driver );
nkeynes@1159: 
nkeynes@1159: /* Set the fallback vertex buffer handling, for drivers with no GL */
nkeynes@1159: void gl_vbo_fallback_init( display_driver_t driver );
nkeynes@1159: 
nkeynes@736: #ifdef __cplusplus
nkeynes@736: }
nkeynes@736: #endif
nkeynes@736: 
nkeynes@736: #endif /* !lxdream_video_gl_H */