Mercurial > sdl-ios-xcode
annotate src/video/dga/SDL_dgavideo.h @ 1555:780fd5b61df1
Fixed bug #89
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 19 Mar 2006 12:05:16 +0000 |
| parents | d910939febfa |
| children | 14717b52abc0 45669d4efd02 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
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parents:
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|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
252
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20 slouken@libsdl.org |
| 0 | 21 */ |
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Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_dgavideo_h | |
| 25 #define _SDL_dgavideo_h | |
| 26 | |
| 27 #include <X11/Xlib.h> | |
| 28 | |
| 29 #include "SDL_mouse.h" | |
| 30 #include "SDL_mutex.h" | |
|
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New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
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31 #include "../SDL_sysvideo.h" |
| 0 | 32 |
| 33 /* Hidden "this" pointer for the video functions */ | |
| 34 #define _THIS SDL_VideoDevice *this | |
| 35 | |
|
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DGA video driver is now thread-safe
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36 /* Define this if you need the DGA driver to be thread-safe */ |
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37 #define LOCK_DGA_DISPLAY |
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38 #ifdef LOCK_DGA_DISPLAY |
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39 #define LOCK_DISPLAY() SDL_mutexP(event_lock) |
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825b2fa28e2e
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40 #define UNLOCK_DISPLAY() SDL_mutexV(event_lock) |
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825b2fa28e2e
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41 #else |
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825b2fa28e2e
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Sam Lantinga <slouken@lokigames.com>
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42 #define LOCK_DISPLAY() |
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825b2fa28e2e
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Sam Lantinga <slouken@lokigames.com>
parents:
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43 #define UNLOCK_DISPLAY() |
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825b2fa28e2e
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Sam Lantinga <slouken@lokigames.com>
parents:
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44 #endif |
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825b2fa28e2e
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Sam Lantinga <slouken@lokigames.com>
parents:
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45 |
| 0 | 46 |
| 47 /* This is the structure we use to keep track of video memory */ | |
| 48 typedef struct vidmem_bucket { | |
| 49 struct vidmem_bucket *prev; | |
|
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50 int used; |
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825b2fa28e2e
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parents:
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diff
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51 int dirty; |
| 0 | 52 Uint8 *base; |
| 53 unsigned int size; | |
| 54 struct vidmem_bucket *next; | |
| 55 } vidmem_bucket; | |
| 56 | |
| 57 /* Private display data */ | |
| 58 struct SDL_PrivateVideoData { | |
| 59 Display *DGA_Display; | |
| 60 Colormap DGA_colormap; | |
| 61 int visualClass; | |
| 62 | |
| 63 #define NUM_MODELISTS 4 /* 8, 16, 24, and 32 bits-per-pixel */ | |
| 64 int SDL_nummodes[NUM_MODELISTS]; | |
| 65 SDL_Rect **SDL_modelist[NUM_MODELISTS]; | |
| 66 | |
| 67 /* Information for the video surface */ | |
| 68 Uint8 *memory_base; | |
| 69 int memory_pitch; | |
| 70 SDL_mutex *hw_lock; | |
| 71 int sync_needed; | |
| 72 int was_flipped; | |
| 73 | |
| 74 /* Information for hardware surfaces */ | |
| 75 vidmem_bucket surfaces; | |
| 76 int surfaces_memtotal; | |
| 77 int surfaces_memleft; | |
| 78 | |
| 79 /* Information for double-buffering */ | |
| 80 int flip_page; | |
| 81 int flip_yoffset[2]; | |
| 82 Uint8 *flip_address[2]; | |
| 83 | |
| 84 /* Used to handle DGA events */ | |
| 85 int event_base; | |
|
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825b2fa28e2e
DGA video driver is now thread-safe
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
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86 #ifdef LOCK_DGA_DISPLAY |
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825b2fa28e2e
DGA video driver is now thread-safe
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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87 SDL_mutex *event_lock; |
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825b2fa28e2e
DGA video driver is now thread-safe
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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88 #endif |
| 0 | 89 }; |
| 90 /* Old variable names */ | |
| 91 #define DGA_Display (this->hidden->DGA_Display) | |
| 92 #define DGA_Screen DefaultScreen(DGA_Display) | |
| 93 #define DGA_colormap (this->hidden->DGA_colormap) | |
| 94 #define DGA_visualClass (this->hidden->visualClass) | |
| 95 #define memory_base (this->hidden->memory_base) | |
| 96 #define memory_pitch (this->hidden->memory_pitch) | |
| 97 #define flip_page (this->hidden->flip_page) | |
| 98 #define flip_yoffset (this->hidden->flip_yoffset) | |
| 99 #define flip_address (this->hidden->flip_address) | |
| 100 #define sync_needed (this->hidden->sync_needed) | |
| 101 #define was_flipped (this->hidden->was_flipped) | |
| 102 #define SDL_nummodes (this->hidden->SDL_nummodes) | |
| 103 #define SDL_modelist (this->hidden->SDL_modelist) | |
| 104 #define surfaces (this->hidden->surfaces) | |
| 105 #define surfaces_memtotal (this->hidden->surfaces_memtotal) | |
| 106 #define surfaces_memleft (this->hidden->surfaces_memleft) | |
| 107 #define hw_lock (this->hidden->hw_lock) | |
| 108 #define DGA_event_base (this->hidden->event_base) | |
|
101
825b2fa28e2e
DGA video driver is now thread-safe
Sam Lantinga <slouken@lokigames.com>
parents:
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109 #define event_lock (this->hidden->event_lock) |
| 0 | 110 |
| 111 #endif /* _SDL_dgavideo_h */ |