1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #ifndef _SDL_fbvideo_h
25 #define _SDL_fbvideo_h
26
27 #include <sys/types.h>
28 #include <termios.h>
29 #include <linux/fb.h>
30
31 #include "SDL_mouse.h"
32 #include "SDL_mutex.h"
33 #include "../SDL_sysvideo.h"
34 #if SDL_INPUT_TSLIB
35 #include "tslib.h"
36 #endif
37
38 /* Hidden "this" pointer for the video functions */
39 #define _THIS SDL_VideoDevice *this
40
41 typedef void FB_bitBlit(
42 Uint8 *src_pos,
43 int src_right_delta, /* pixels, not bytes */
44 int src_down_delta, /* pixels, not bytes */
45 Uint8 *dst_pos,
46 int dst_linebytes,
47 int width,
48 int height);
49
50 /* This is the structure we use to keep track of video memory */
51 typedef struct vidmem_bucket {
52 struct vidmem_bucket *prev;
53 int used;
54 int dirty;
55 char *base;
56 unsigned int size;
57 struct vidmem_bucket *next;
58 } vidmem_bucket;
59
60 /* Private display data */
61 struct SDL_PrivateVideoData {
62 int console_fd;
63 struct fb_var_screeninfo cache_vinfo;
64 struct fb_var_screeninfo saved_vinfo;
65 int saved_cmaplen;
66 __u16 *saved_cmap;
67
68 int current_vt;
69 int saved_vt;
70 int keyboard_fd;
71 int saved_kbd_mode;
72 struct termios saved_kbd_termios;
73
74 int mouse_fd;
75 #if SDL_INPUT_TSLIB
76 struct tsdev *ts_dev;
77 #endif
78
79 char *mapped_mem;
80 char *shadow_mem;
81 int mapped_memlen;
82 int mapped_offset;
83 char *mapped_io;
84 long mapped_iolen;
85 int flip_page;
86 char *flip_address[2];
87 int rotate;
88 int shadow_fb; /* Tells whether a shadow is being used. */
89 FB_bitBlit *blitFunc;
90 int physlinebytes; /* Length of a line in bytes in physical fb */
91
92 #define NUM_MODELISTS 4 /* 8, 16, 24, and 32 bits-per-pixel */
93 int SDL_nummodes[NUM_MODELISTS];
94 SDL_Rect **SDL_modelist[NUM_MODELISTS];
95
96 vidmem_bucket surfaces;
97 int surfaces_memtotal;
98 int surfaces_memleft;
99
100 SDL_mutex *hw_lock;
101 int switched_away;
102 struct fb_var_screeninfo screen_vinfo;
103 Uint32 screen_arealen;
104 Uint8 *screen_contents;
105 __u16 screen_palette[3*256];
106
107 void (*wait_vbl)(_THIS);
108 void (*wait_idle)(_THIS);
109 };
110 /* Old variable names */
111 #define console_fd (this->hidden->console_fd)
112 #define current_vt (this->hidden->current_vt)
113 #define saved_vt (this->hidden->saved_vt)
114 #define keyboard_fd (this->hidden->keyboard_fd)
115 #define saved_kbd_mode (this->hidden->saved_kbd_mode)
116 #define saved_kbd_termios (this->hidden->saved_kbd_termios)
117 #define mouse_fd (this->hidden->mouse_fd)
118 #if SDL_INPUT_TSLIB
119 #define ts_dev (this->hidden->ts_dev)
120 #endif
121 #define cache_vinfo (this->hidden->cache_vinfo)
122 #define saved_vinfo (this->hidden->saved_vinfo)
123 #define saved_cmaplen (this->hidden->saved_cmaplen)
124 #define saved_cmap (this->hidden->saved_cmap)
125 #define mapped_mem (this->hidden->mapped_mem)
126 #define shadow_mem (this->hidden->shadow_mem)
127 #define mapped_memlen (this->hidden->mapped_memlen)
128 #define mapped_offset (this->hidden->mapped_offset)
129 #define mapped_io (this->hidden->mapped_io)
130 #define mapped_iolen (this->hidden->mapped_iolen)
131 #define flip_page (this->hidden->flip_page)
132 #define flip_address (this->hidden->flip_address)
133 #define rotate (this->hidden->rotate)
134 #define shadow_fb (this->hidden->shadow_fb)
135 #define blitFunc (this->hidden->blitFunc)
136 #define physlinebytes (this->hidden->physlinebytes)
137 #define SDL_nummodes (this->hidden->SDL_nummodes)
138 #define SDL_modelist (this->hidden->SDL_modelist)
139 #define surfaces (this->hidden->surfaces)
140 #define surfaces_memtotal (this->hidden->surfaces_memtotal)
141 #define surfaces_memleft (this->hidden->surfaces_memleft)
142 #define hw_lock (this->hidden->hw_lock)
143 #define switched_away (this->hidden->switched_away)
144 #define screen_vinfo (this->hidden->screen_vinfo)
145 #define screen_arealen (this->hidden->screen_arealen)
146 #define screen_contents (this->hidden->screen_contents)
147 #define screen_palette (this->hidden->screen_palette)
148 #define wait_vbl (this->hidden->wait_vbl)
149 #define wait_idle (this->hidden->wait_idle)
150
151 /* Accelerator types that are supported by the driver, but are not
152 necessarily in the kernel headers on the system we compile on.
153 */
154 #ifndef FB_ACCEL_MATROX_MGAG400
155 #define FB_ACCEL_MATROX_MGAG400 26 /* Matrox G400 */
156 #endif
157 #ifndef FB_ACCEL_3DFX_BANSHEE
158 #define FB_ACCEL_3DFX_BANSHEE 31 /* 3Dfx Banshee */
159 #endif
160
161 /* These functions are defined in SDL_fbvideo.c */
162 extern void FB_SavePaletteTo(_THIS, int palette_len, __u16 *area);
163 extern void FB_RestorePaletteFrom(_THIS, int palette_len, __u16 *area);
164
165 /* These are utility functions for working with video surfaces */
166
FB_AddBusySurface(SDL_Surface * surface)167 static __inline__ void FB_AddBusySurface(SDL_Surface *surface)
168 {
169 ((vidmem_bucket *)surface->hwdata)->dirty = 1;
170 }
171
FB_IsSurfaceBusy(SDL_Surface * surface)172 static __inline__ int FB_IsSurfaceBusy(SDL_Surface *surface)
173 {
174 return ((vidmem_bucket *)surface->hwdata)->dirty;
175 }
176
FB_WaitBusySurfaces(_THIS)177 static __inline__ void FB_WaitBusySurfaces(_THIS)
178 {
179 vidmem_bucket *bucket;
180
181 /* Wait for graphic operations to complete */
182 wait_idle(this);
183
184 /* Clear all surface dirty bits */
185 for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
186 bucket->dirty = 0;
187 }
188 }
189
FB_dst_to_xy(_THIS,SDL_Surface * dst,int * x,int * y)190 static __inline__ void FB_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y)
191 {
192 *x = (long)((char *)dst->pixels - mapped_mem)%this->screen->pitch;
193 *y = (long)((char *)dst->pixels - mapped_mem)/this->screen->pitch;
194 if ( dst == this->screen ) {
195 *x += this->offset_x;
196 *y += this->offset_y;
197 }
198 }
199
200 #endif /* _SDL_fbvideo_h */
201