src/video/dga/SDL_dgavideo.h
author Sam Lantinga <slouken@lokigames.com>
Thu, 12 Jul 2001 20:42:22 +0000
changeset 101 825b2fa28e2e
parent 0 74212992fb08
child 105 2136ea8953f9
permissions -rw-r--r--
DGA video driver is now thread-safe
Improved DGA hardware acceleration code
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Library General Public
     7     License as published by the Free Software Foundation; either
     8     version 2 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Library General Public License for more details.
    14 
    15     You should have received a copy of the GNU Library General Public
    16     License along with this library; if not, write to the Free
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    18 
    19     Sam Lantinga
    20     slouken@devolution.com
    21 */
    22 
    23 #ifdef SAVE_RCSID
    24 static char rcsid =
    25  "@(#) $Id$";
    26 #endif
    27 
    28 #ifndef _SDL_dgavideo_h
    29 #define _SDL_dgavideo_h
    30 
    31 #include <X11/Xlib.h>
    32 
    33 #include "SDL_mouse.h"
    34 #include "SDL_mutex.h"
    35 #include "SDL_sysvideo.h"
    36 
    37 /* Hidden "this" pointer for the video functions */
    38 #define _THIS	SDL_VideoDevice *this
    39 
    40 /* Define this if you need the DGA driver to be thread-safe */
    41 #define LOCK_DGA_DISPLAY
    42 #ifdef LOCK_DGA_DISPLAY
    43 #define LOCK_DISPLAY()		SDL_mutexP(event_lock)
    44 #define UNLOCK_DISPLAY()	SDL_mutexV(event_lock)
    45 #else
    46 #define LOCK_DISPLAY()
    47 #define UNLOCK_DISPLAY()
    48 #endif
    49 
    50 
    51 /* This is the structure we use to keep track of video memory */
    52 typedef struct vidmem_bucket {
    53 	struct vidmem_bucket *prev;
    54 	int used;
    55 	int dirty;
    56 	Uint8 *base;
    57 	unsigned int size;
    58 	struct vidmem_bucket *next;
    59 } vidmem_bucket;
    60 
    61 /* Information about the location of the surface in hardware memory */
    62 struct private_hwdata {
    63 	int x;
    64 	int y;
    65 };
    66 
    67 /* Private display data */
    68 struct SDL_PrivateVideoData {
    69 	Display *DGA_Display;
    70 	Colormap DGA_colormap;
    71 	int visualClass;
    72 
    73 #define NUM_MODELISTS	4		/* 8, 16, 24, and 32 bits-per-pixel */
    74 	int SDL_nummodes[NUM_MODELISTS];
    75 	SDL_Rect **SDL_modelist[NUM_MODELISTS];
    76 
    77 	/* Information for the video surface */
    78 	Uint8 *memory_base;
    79 	int memory_pitch;
    80 	SDL_mutex *hw_lock;
    81 	int sync_needed;
    82 	int was_flipped;
    83 
    84 	/* Information for hardware surfaces */
    85 	vidmem_bucket surfaces;
    86 	int surfaces_memtotal;
    87 	int surfaces_memleft;
    88 
    89 	/* Information for double-buffering */
    90 	int flip_page;
    91 	int flip_yoffset[2];
    92 	Uint8 *flip_address[2];
    93 
    94 	/* Used to handle DGA events */
    95 	int event_base;
    96 #ifdef LOCK_DGA_DISPLAY
    97 	SDL_mutex *event_lock;
    98 #endif
    99 };
   100 /* Old variable names */
   101 #define DGA_Display		(this->hidden->DGA_Display)
   102 #define DGA_Screen		DefaultScreen(DGA_Display)
   103 #define DGA_colormap		(this->hidden->DGA_colormap)
   104 #define DGA_visualClass		(this->hidden->visualClass)
   105 #define memory_base		(this->hidden->memory_base)
   106 #define memory_pitch		(this->hidden->memory_pitch)
   107 #define flip_page		(this->hidden->flip_page)
   108 #define flip_yoffset		(this->hidden->flip_yoffset)
   109 #define flip_address		(this->hidden->flip_address)
   110 #define sync_needed		(this->hidden->sync_needed)
   111 #define was_flipped		(this->hidden->was_flipped)
   112 #define SDL_nummodes		(this->hidden->SDL_nummodes)
   113 #define SDL_modelist		(this->hidden->SDL_modelist)
   114 #define surfaces		(this->hidden->surfaces)
   115 #define surfaces_memtotal	(this->hidden->surfaces_memtotal)
   116 #define surfaces_memleft	(this->hidden->surfaces_memleft)
   117 #define hw_lock			(this->hidden->hw_lock)
   118 #define DGA_event_base		(this->hidden->event_base)
   119 #define event_lock		(this->hidden->event_lock)
   120 
   121 #endif /* _SDL_dgavideo_h */