Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11dyn.c @ 1240:3b8a43c428bb
From Bug #36:
There are a couple of issues with the selection of Altivec alpha-blitting
routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c.
1) There's no check for the presence of Altivec when checking if the
Blit32to565PixelAlphaAltivec() routine can be selected.
2) Altivec cannot be used in video memory, and there's no check if the
destination surface is a hardware surface. (Alpha-blitting to a hardware
surface with GPU support is a bad idea, but somebody's bound to do it anyway.)
Patch to fix these attached.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Sun, 08 Jan 2006 21:18:15 +0000 |
parents | ed252764287a |
children | fe7d081a4955 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2004 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 Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 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 Library 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 Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 |
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23 #if 0 |
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24 #define DEBUG_DYNAMIC_X11 1 |
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25 #endif |
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26 |
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More dynamic X11 fixes...catches some code in Xlib headers that caused
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27 #define __SDL_NO_REDEFINE_X11_HEADER_SYMS 1 |
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28 #include "SDL_x11dyn.h" |
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29 |
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30 #ifdef DEBUG_DYNAMIC_X11 |
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31 #include <stdio.h> |
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32 #endif |
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33 |
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34 #ifdef X11_DYNAMIC |
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35 #include <dlfcn.h> |
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36 #include "SDL_name.h" |
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37 #include "SDL_loadso.h" |
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38 static const char *x11_library = X11_DYNAMIC; |
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39 static void *x11_handle = NULL; |
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40 static const char *x11ext_library = X11EXT_DYNAMIC; |
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41 static void *x11ext_handle = NULL; |
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42 |
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43 static void *X11_GetSym(int required, const char *fnname, int *rc) |
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44 { |
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45 void *fn = NULL; |
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46 if (*rc) { /* haven't already failed on a previous lookup? */ |
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47 fn = SDL_LoadFunction(x11_handle, fnname); |
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48 #if DEBUG_DYNAMIC_X11 |
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49 if (fn != NULL) |
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50 printf("X11: Found '%s' in libX11 (%p)\n", fnname, fn); |
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51 #endif |
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52 |
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53 if (fn == NULL) { /* not found? Check libX11ext ... */ |
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54 fn = SDL_LoadFunction(x11ext_handle, fnname); |
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55 #if DEBUG_DYNAMIC_X11 |
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56 if (fn != NULL) |
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57 printf("X11: Found '%s' in libXext (%p)\n", fnname, fn); |
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58 else |
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59 printf("X11: Symbol '%s' NOT FOUND!%s\n", fnname |
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60 required ? "" : " (...but not required!)"); |
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61 #endif |
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62 } |
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63 *rc = ((fn != NULL) || (!required)); |
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64 } |
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65 |
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66 return fn; |
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67 } |
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68 #endif /* defined X11_DYNAMIC */ |
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69 |
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70 /* Define all the function pointers... */ |
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71 #define SDL_X11_SYM(req,ret,fn,params) ret (*p##fn) params = NULL; |
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72 #include "SDL_x11sym.h" |
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73 #undef SDL_X11_SYM |
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74 |
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75 static int x11_load_refcount = 0; |
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76 |
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77 void SDL_X11_UnloadSymbols(void) |
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78 { |
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79 /* Don't actually unload if more than one module is using the libs... */ |
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80 if (x11_load_refcount > 0) { |
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81 if (--x11_load_refcount == 0) { |
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82 /* set all the function pointers to NULL. */ |
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83 #define SDL_X11_SYM(req,ret,fn,params) p##fn = NULL; |
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84 #include "SDL_x11sym.h" |
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85 #undef SDL_X11_SYM |
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86 |
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87 #ifdef X11_DYNAMIC |
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88 if (x11_handle != NULL) { |
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89 SDL_UnloadObject(x11_handle); |
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90 x11_handle = NULL; |
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91 } |
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92 if (x11ext_handle != NULL) { |
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93 SDL_UnloadObject(x11ext_handle); |
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94 x11ext_handle = NULL; |
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95 } |
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96 #endif |
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97 } |
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98 } |
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99 } |
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100 |
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101 /* returns non-zero if all needed symbols were loaded. */ |
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102 int SDL_X11_LoadSymbols(void) |
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103 { |
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104 int rc = 1; |
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105 |
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106 /* deal with multiple modules (dga, x11, etc) needing these symbols... */ |
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107 if (x11_load_refcount++ == 0) { |
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108 #ifdef X11_DYNAMIC |
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109 x11_handle = SDL_LoadObject(x11_library); |
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110 x11ext_handle = SDL_LoadObject(x11ext_library); |
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111 rc = ((x11_handle != NULL) && (x11ext_handle != NULL)); |
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112 #define SDL_X11_SYM(req,r,fn,arg) p##fn = X11_GetSym(req,#fn, &rc); |
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113 #include "SDL_x11sym.h" |
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114 #undef SDL_X11_SYM |
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115 |
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116 if (!rc) |
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117 SDL_X11_UnloadSymbols(); /* in case one of these loaded... */ |
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118 |
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119 #else |
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120 #define SDL_X11_SYM(req,r,fn,arg) p##fn = fn; |
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121 #include "SDL_x11sym.h" |
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122 #undef SDL_X11_SYM |
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123 #endif |
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124 } |
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125 |
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126 return rc; |
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127 } |
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128 |
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129 /* end of SDL_x11dyn.c ... */ |
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130 |