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annotate src/video/Xext/extensions/extutil.h @ 1944:91f41fc124a7

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The AAlib driver is fun, but not worth rewriting for SDL 1.3
author Sam Lantinga <slouken@libsdl.org>
date Wed, 26 Jul 2006 03:24:27 +0000
parents c121d94672cb
children
rev   line source
292
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1 /*
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2 * $Xorg: extutil.h,v 1.4 2001/02/09 02:03:24 xorgcvs Exp $
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3 *
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4 Copyright 1989, 1998 The Open Group
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5
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6 Permission to use, copy, modify, distribute, and sell this software and its
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7 documentation for any purpose is hereby granted without fee, provided that
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8 the above copyright notice appear in all copies and that both that
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9 copyright notice and this permission notice appear in supporting
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10 documentation.
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11
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12 The above copyright notice and this permission notice shall be included in
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13 all copies or substantial portions of the Software.
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14
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15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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18 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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19 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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21
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22 Except as contained in this notice, the name of The Open Group shall not be
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23 used in advertising or otherwise to promote the sale, use or other dealings
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24 in this Software without prior written authorization from The Open Group.
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25 *
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26 * Author: Jim Fulton, MIT The Open Group
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27 *
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28 * Xlib Extension-Writing Utilities
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29 *
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30 * This package contains utilities for writing the client API for various
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31 * protocol extensions. THESE INTERFACES ARE NOT PART OF THE X STANDARD AND
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32 * ARE SUBJECT TO CHANGE!
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33 */
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34 /* $XFree86: xc/include/extensions/extutil.h,v 1.9 2001/12/14 19:53:28 dawes Exp $ */
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35
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36 #ifndef _EXTUTIL_H_
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37 #define _EXTUTIL_H_
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38
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39 #include "SDL_stdinc.h" /* For portable string functions */
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40
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41 #include "./Xext.h"
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42
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43 /*
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44 * We need to keep a list of open displays since the Xlib display list isn't
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45 * public. We also have to per-display info in a separate block since it isn't
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46 * stored directly in the Display structure.
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47 */
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48 typedef struct _XExtDisplayInfo
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49 {
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50 struct _XExtDisplayInfo *next; /* keep a linked list */
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51 Display *display; /* which display this is */
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52 XExtCodes *codes; /* the extension protocol codes */
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53 XPointer data; /* extra data for extension to use */
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54 } XExtDisplayInfo;
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55
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56 typedef struct _XExtensionInfo
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57 {
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58 XExtDisplayInfo *head; /* start of list */
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59 XExtDisplayInfo *cur; /* most recently used */
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60 int ndisplays; /* number of displays */
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61 } XExtensionInfo;
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62
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63 typedef struct _XExtensionHooks
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64 {
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65 int (*create_gc) (
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66 #if NeedNestedPrototypes
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67 Display * /* display */ ,
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68 GC /* gc */ ,
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69 XExtCodes * /* codes */
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70 #endif
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71 );
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72 int (*copy_gc) (
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73 #if NeedNestedPrototypes
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74 Display * /* display */ ,
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75 GC /* gc */ ,
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76 XExtCodes * /* codes */
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77 #endif
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78 );
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79 int (*flush_gc) (
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80 #if NeedNestedPrototypes
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81 Display * /* display */ ,
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82 GC /* gc */ ,
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83 XExtCodes * /* codes */
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84 #endif
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85 );
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86 int (*free_gc) (
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87 #if NeedNestedPrototypes
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88 Display * /* display */ ,
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89 GC /* gc */ ,
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90 XExtCodes * /* codes */
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91 #endif
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92 );
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93 int (*create_font) (
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94 #if NeedNestedPrototypes
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95 Display * /* display */ ,
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96 XFontStruct * /* fs */ ,
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97 XExtCodes * /* codes */
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98 #endif
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99 );
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100 int (*free_font) (
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101 #if NeedNestedPrototypes
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102 Display * /* display */ ,
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103 XFontStruct * /* fs */ ,
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104 XExtCodes * /* codes */
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105 #endif
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106 );
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107 int (*close_display) (
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108 #if NeedNestedPrototypes
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109 Display * /* display */ ,
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110 XExtCodes * /* codes */
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111 #endif
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112 );
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113 Bool(*wire_to_event) (
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114 #if NeedNestedPrototypes
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115 Display * /* display */ ,
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116 XEvent * /* re */ ,
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117 xEvent * /* event */
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118 #endif
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119 );
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120 Status(*event_to_wire) (
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121 #if NeedNestedPrototypes
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122 Display * /* display */ ,
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123 XEvent * /* re */ ,
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124 xEvent * /* event */
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125 #endif
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126 );
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127 int (*error) (
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128 #if NeedNestedPrototypes
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129 Display * /* display */ ,
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130 xError * /* err */ ,
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131 XExtCodes * /* codes */ ,
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132 int * /* ret_code */
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133 #endif
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134 );
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135 char *(*error_string) (
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136 #if NeedNestedPrototypes
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137 Display * /* display */ ,
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138 int /* code */ ,
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139 XExtCodes * /* codes */ ,
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140 char * /* buffer */ ,
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141 int /* nbytes */
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142 #endif
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143 );
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144 } XExtensionHooks;
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145
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146 extern XExtensionInfo *XextCreateExtension(
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147 #if NeedFunctionPrototypes
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148 void
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149 #endif
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150 );
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151 extern void XextDestroyExtension(
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152 #if NeedFunctionPrototypes
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153 XExtensionInfo * /* info */
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154 #endif
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155 );
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156 extern XExtDisplayInfo *XextAddDisplay(
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157 #if NeedFunctionPrototypes
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158 XExtensionInfo * /* extinfo */ ,
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159 Display * /* dpy */ ,
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160 char * /* ext_name */ ,
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161 XExtensionHooks * /* hooks */ ,
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162 int /* nevents */ ,
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163 XPointer /* data */
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164 #endif
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165 );
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166 extern int XextRemoveDisplay(
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167 #if NeedFunctionPrototypes
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168 XExtensionInfo * /* extinfo */ ,
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169 Display * /* dpy */
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170 #endif
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171 );
292
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172 extern XExtDisplayInfo *XextFindDisplay(
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173 #if NeedFunctionPrototypes
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174 XExtensionInfo * /* extinfo */ ,
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175 Display * /* dpy */
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176 #endif
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177 );
292
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178
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179 #define XextHasExtension(i) ((i) && ((i)->codes))
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180 #define XextCheckExtension(dpy,i,name,val) \
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181 if (!XextHasExtension(i)) { XMissingExtension (dpy, name); return val; }
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182 #define XextSimpleCheckExtension(dpy,i,name) \
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183 if (!XextHasExtension(i)) { XMissingExtension (dpy, name); return; }
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184
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185
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186 /*
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187 * helper macros to generate code that is common to all extensions; caller
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188 * should prefix it with static if extension source is in one file; this
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189 * could be a utility function, but have to stack 6 unused arguments for
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190 * something that is called many, many times would be bad.
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191 */
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192 #define XEXT_GENERATE_FIND_DISPLAY(proc,extinfo,extname,hooks,nev,data) \
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193 XExtDisplayInfo *proc (Display *dpy) \
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194 { \
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195 XExtDisplayInfo *dpyinfo; \
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196 if (!extinfo) { if (!(extinfo = XextCreateExtension())) return NULL; } \
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197 if (!(dpyinfo = XextFindDisplay (extinfo, dpy))) \
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198 dpyinfo = XextAddDisplay (extinfo,dpy,extname,hooks,nev,data); \
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199 return dpyinfo; \
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200 }
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201
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202 #define XEXT_FIND_DISPLAY_PROTO(proc) \
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203 XExtDisplayInfo *proc(Display *dpy)
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204
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205 #define XEXT_GENERATE_CLOSE_DISPLAY(proc,extinfo) \
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206 int proc (Display *dpy, XExtCodes *codes) \
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207 { \
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208 return XextRemoveDisplay (extinfo, dpy); \
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209 }
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210
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211 #define XEXT_CLOSE_DISPLAY_PROTO(proc) \
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212 int proc(Display *dpy, XExtCodes *codes)
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213
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214 #define XEXT_GENERATE_ERROR_STRING(proc,extname,nerr,errl) \
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215 char *proc (Display *dpy, int code, XExtCodes *codes, char *buf, int n) \
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216 { \
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217 code -= codes->first_error; \
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218 if (code >= 0 && code < nerr) { \
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219 char tmp[256]; \
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220 SDL_snprintf (tmp, SDL_arraysize(tmp), "%s.%d", extname, code); \
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221 XGetErrorDatabaseText (dpy, "XProtoError", tmp, errl[code], buf, n); \
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222 return buf; \
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223 } \
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224 return (char *)0; \
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225 }
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226
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227 #define XEXT_ERROR_STRING_PROTO(proc) \
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228 char *proc(Display *dpy, int code, XExtCodes *codes, char *buf, int n)
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229 #endif
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230 /* vi: set ts=4 sw=4 expandtab: */