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annotate src/loadso/win32/SDL_sysloadso.c @ 1554:0ca607a5d173

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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 bb6839704ed6
children 92947e3a18db
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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25 /* System dependent library loading routines */
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26
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27 #define WIN32_LEAN_AND_MEAN
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28 #include <windows.h>
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29
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30 #include "SDL_loadso.h"
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31
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32 void *SDL_LoadObject(const char *sofile)
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33 {
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34 void *handle = NULL;
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35 const char *loaderror = "Unknown error";
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36
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37 #if defined(_WIN32_WCE)
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38 char errbuf[512];
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39
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40 wchar_t *errbuf_t = SDL_malloc(512 * sizeof(wchar_t));
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41 wchar_t *sofile_t = SDL_malloc((MAX_PATH+1) * sizeof(wchar_t));
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42
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43 MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, sofile, -1, sofile_t, MAX_PATH);
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44 handle = (void *)LoadLibrary(sofile_t);
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45
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46 /* Generate an error message if all loads failed */
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47 if ( handle == NULL ) {
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48 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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49 FORMAT_MESSAGE_FROM_SYSTEM),
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50 NULL, GetLastError(),
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51 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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52 errbuf_t, SDL_arraysize(errbuf), NULL);
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53 WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
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54 loaderror = errbuf;
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55 }
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56
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57 SDL_free(sofile_t);
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58 SDL_free(errbuf_t);
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59
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60 #else /*if defined(__WIN32__)*/
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61 char errbuf[512];
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62
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63 handle = (void *)LoadLibrary(sofile);
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64
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65 /* Generate an error message if all loads failed */
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66 if ( handle == NULL ) {
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67 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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68 FORMAT_MESSAGE_FROM_SYSTEM),
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69 NULL, GetLastError(),
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70 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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71 errbuf, SDL_arraysize(errbuf), NULL);
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72 loaderror = errbuf;
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73 }
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74 #endif
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75
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76 if ( handle == NULL ) {
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77 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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78 }
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79 return(handle);
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80 }
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81
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82 void *SDL_LoadFunction(void *handle, const char *name)
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83 {
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84 void *symbol = NULL;
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85 const char *loaderror = "Unknown error";
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86
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87 #if defined(_WIN32_WCE)
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88 char errbuf[512];
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89 int length = SDL_strlen(name);
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90
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91 wchar_t *name_t = SDL_malloc((length + 1) * sizeof(wchar_t));
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92 wchar_t *errbuf_t = SDL_malloc(512 * sizeof(wchar_t));
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93
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94 MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, name_t, length);
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95
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96 symbol = (void *)GetProcAddress((HMODULE)handle, name_t);
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97 if ( symbol == NULL ) {
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98 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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99 FORMAT_MESSAGE_FROM_SYSTEM),
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100 NULL, GetLastError(),
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101 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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102 errbuf_t, SDL_arraysize(errbuf), NULL);
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103 WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
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104 loaderror = errbuf;
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105 }
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106
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107 SDL_free(name_t);
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108 SDL_free(errbuf_t);
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109
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110 #else /*if defined(WIN32)*/
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111 char errbuf[512];
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112
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113 symbol = (void *)GetProcAddress((HMODULE)handle, name);
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114 if ( symbol == NULL ) {
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115 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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116 FORMAT_MESSAGE_FROM_SYSTEM),
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117 NULL, GetLastError(),
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118 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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119 errbuf, SDL_arraysize(errbuf), NULL);
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120 loaderror = errbuf;
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121 }
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122 #endif
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123
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124 if ( symbol == NULL ) {
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125 SDL_SetError("Failed loading %s: %s", name, loaderror);
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126 }
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127 return(symbol);
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128 }
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129
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130 void SDL_UnloadObject(void *handle)
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131 {
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
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132 if ( handle != NULL ) {
19418e4422cb New configure-based build system. Still work in progress, but much improved
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133 FreeLibrary((HMODULE)handle);
19418e4422cb New configure-based build system. Still work in progress, but much improved
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134 }
19418e4422cb New configure-based build system. Still work in progress, but much improved
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135 }
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
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136