Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11dga.c @ 1554:0ca607a5d173
Fixed bug #84
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 12:04:40 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb cbad710a6509 |
| 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)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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changeset
|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
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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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 | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
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
diff
changeset
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
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Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
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20 slouken@libsdl.org |
| 0 | 21 */ |
|
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d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* This is currently only used to enable DGA mouse. | |
| 25 The new fullscreen code makes it very difficult to handle DGA dynamically. | |
| 26 There will be a completely separate DGA driver that is fullscreen-only. | |
| 27 */ | |
| 28 | |
| 29 #include "SDL_video.h" | |
|
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New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
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30 #include "../SDL_cursor_c.h" |
| 0 | 31 #include "SDL_x11dga_c.h" |
| 32 | |
| 33 /* Global for the error handler */ | |
| 34 int dga_event, dga_error = -1; | |
| 35 | |
| 36 void X11_EnableDGAMouse(_THIS) | |
| 37 { | |
|
1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
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38 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
| 0 | 39 int dga_major, dga_minor; |
| 40 int use_dgamouse; | |
| 41 const char *env_use_dgamouse; | |
| 42 | |
| 43 /* Check configuration to see if we should use DGA mouse */ | |
| 44 use_dgamouse = 1; | |
|
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Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
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45 env_use_dgamouse = SDL_getenv("SDL_VIDEO_X11_DGAMOUSE"); |
| 0 | 46 if ( env_use_dgamouse ) { |
| 47 use_dgamouse = atoi(env_use_dgamouse); | |
| 48 } | |
| 49 /* Check for buggy X servers */ | |
| 50 if ( use_dgamouse && BUGGY_XFREE86(==, 4000) ) { | |
| 51 use_dgamouse = 0; | |
| 52 } | |
| 53 /* Only use DGA mouse if the cursor is not showing (in relative mode) */ | |
| 54 if ( use_dgamouse && local_X11 && !(using_dga & DGA_MOUSE) && | |
|
292
eadc0746dfaf
Added SDL_LockRect() and SDL_UnlockRect()
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
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55 SDL_NAME(XF86DGAQueryExtension)(SDL_Display, &dga_event, &dga_error) && |
|
eadc0746dfaf
Added SDL_LockRect() and SDL_UnlockRect()
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
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56 SDL_NAME(XF86DGAQueryVersion)(SDL_Display, &dga_major, &dga_minor) ) { |
|
eadc0746dfaf
Added SDL_LockRect() and SDL_UnlockRect()
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
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57 if ( SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, XF86DGADirectMouse) ) { |
| 0 | 58 using_dga |= DGA_MOUSE; |
| 59 } | |
| 60 } | |
|
1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
|
61 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */ |
| 0 | 62 } |
| 63 | |
| 64 /* Argh. Glide resets DGA mouse mode when it makes the context current! */ | |
| 65 void X11_CheckDGAMouse(_THIS) | |
| 66 { | |
|
1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
|
67 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
| 0 | 68 int flags; |
| 69 | |
| 70 if ( using_dga & DGA_MOUSE ) { | |
|
292
eadc0746dfaf
Added SDL_LockRect() and SDL_UnlockRect()
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
71 SDL_NAME(XF86DGAQueryDirectVideo)(SDL_Display, SDL_Screen, &flags); |
| 0 | 72 if ( ! (flags & XF86DGADirectMouse) ) { |
|
292
eadc0746dfaf
Added SDL_LockRect() and SDL_UnlockRect()
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
73 SDL_NAME(XF86DGADirectVideo)(SDL_Display,SDL_Screen,XF86DGADirectMouse); |
| 0 | 74 } |
| 75 } | |
| 76 #endif | |
| 77 } | |
| 78 | |
| 79 void X11_DisableDGAMouse(_THIS) | |
| 80 { | |
|
1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
|
81 #if SDL_VIDEO_DRIVER_X11_DGAMOUSE |
| 0 | 82 if ( using_dga & DGA_MOUSE ) { |
|
292
eadc0746dfaf
Added SDL_LockRect() and SDL_UnlockRect()
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
83 SDL_NAME(XF86DGADirectVideo)(SDL_Display, SDL_Screen, 0); |
| 0 | 84 using_dga &= ~DGA_MOUSE; |
| 85 } | |
|
1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
|
86 #endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */ |
| 0 | 87 } |