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annotate src/video/wincommon/SDL_sysmouse.c @ 1895:c121d94672cb

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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 10 Jul 2006 21:04:37 +0000
parents 4aac8563c296
children
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 #define WIN32_LEAN_AND_MEAN
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25 #include <windows.h>
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26
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27 #include "SDL_mouse.h"
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28 #include "../../events/SDL_events_c.h"
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29 #include "../SDL_cursor_c.h"
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30 #include "SDL_sysmouse_c.h"
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31 #include "SDL_lowvideo.h"
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32
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33 #ifdef _WIN32_WCE
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34 #define USE_STATIC_CURSOR
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35 #endif
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36
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37 HCURSOR SDL_hcursor = NULL; /* Exported for SDL_eventloop.c */
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38
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39 /* The implementation dependent data for the window manager cursor */
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40 /* For some reason when creating a windows cursor, the ands and xors memory
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41 is not copied, so we need to keep track of it and free it when we are done
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42 with the cursor. If we free the memory prematurely, the app crashes. :-}
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43 */
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44 struct WMcursor
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45 {
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46 HCURSOR curs;
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47 #ifndef USE_STATIC_CURSOR
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48 Uint8 *ands;
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49 Uint8 *xors;
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50 #endif
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51 };
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52
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53 /* Convert bits to padded bytes */
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54 #define PAD_BITS(bits) ((bits+7)/8)
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55
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56 #ifdef CURSOR_DEBUG
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57 static void
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58 PrintBITMAP(FILE * out, char *bits, int w, int h)
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59 {
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60 int i;
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61 unsigned char ch;
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62
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63 while (h-- > 0) {
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64 for (i = 0; i < w; ++i) {
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65 if ((i % 8) == 0)
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66 ch = *bits++;
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67 if (ch & 0x80)
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68 fprintf(out, "X");
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69 else
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70 fprintf(out, " ");
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71 ch <<= 1;
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72 }
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73 fprintf(out, "\n");
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74 }
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75 }
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76 #endif
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77
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78 #ifndef USE_STATIC_CURSOR
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79 /* Local functions to convert the SDL cursor mask into Windows format */
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80 static void
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81 memnot(Uint8 * dst, Uint8 * src, int len)
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82 {
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83 while (len-- > 0)
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84 *dst++ = ~*src++;
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85 }
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86 static void
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87 memxor(Uint8 * dst, Uint8 * src1, Uint8 * src2, int len)
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88 {
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89 while (len-- > 0)
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90 *dst++ = (*src1++) ^ (*src2++);
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91 }
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92 #endif /* !USE_STATIC_CURSOR */
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93
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94 void
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95 WIN_FreeWMCursor(_THIS, WMcursor * cursor)
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96 {
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97 #ifndef USE_STATIC_CURSOR
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98 if (cursor->curs == GetCursor())
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99 SetCursor(NULL);
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100 if (cursor->curs != NULL)
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101 DestroyCursor(cursor->curs);
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102 if (cursor->ands != NULL)
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103 SDL_free(cursor->ands);
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104 if (cursor->xors != NULL)
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105 SDL_free(cursor->xors);
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106 #endif /* !USE_STATIC_CURSOR */
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107 SDL_free(cursor);
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108 }
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109
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110 WMcursor *
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111 WIN_CreateWMCursor(_THIS,
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112 Uint8 * data, Uint8 * mask, int w, int h, int hot_x,
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113 int hot_y)
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114 {
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115 #ifdef USE_STATIC_CURSOR
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116 WMcursor *cursor;
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117
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118 /* Allocate the cursor */
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119 cursor = (WMcursor *) SDL_malloc(sizeof(*cursor));
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120 if (cursor) {
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121 cursor->curs = LoadCursor(NULL, IDC_ARROW);
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122 }
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123 return (cursor);
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124 #else
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125 WMcursor *cursor;
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126 int allowed_x;
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127 int allowed_y;
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128 int run, pad, i;
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129 Uint8 *aptr, *xptr;
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130
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131 /* Check to make sure the cursor size is okay */
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132 allowed_x = GetSystemMetrics(SM_CXCURSOR);
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133 allowed_y = GetSystemMetrics(SM_CYCURSOR);
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134 if ((w > allowed_x) || (h > allowed_y)) {
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135 SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
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136 allowed_x, allowed_y);
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137 return (NULL);
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138 }
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139
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140 /* Allocate the cursor */
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141 cursor = (WMcursor *) SDL_malloc(sizeof(*cursor));
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142 if (cursor == NULL) {
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143 SDL_SetError("Out of memory");
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144 return (NULL);
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145 }
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146 cursor->curs = NULL;
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147 cursor->ands = NULL;
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148 cursor->xors = NULL;
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149
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150 /* Pad out to the normal cursor size */
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151 run = PAD_BITS(w);
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152 pad = PAD_BITS(allowed_x) - run;
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153 aptr = cursor->ands = (Uint8 *) SDL_malloc((run + pad) * allowed_y);
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154 xptr = cursor->xors = (Uint8 *) SDL_malloc((run + pad) * allowed_y);
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155 if ((aptr == NULL) || (xptr == NULL)) {
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156 WIN_FreeWMCursor(NULL, cursor);
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157 SDL_OutOfMemory();
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158 return (NULL);
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159 }
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160 for (i = 0; i < h; ++i) {
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161 memxor(xptr, data, mask, run);
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162 xptr += run;
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163 data += run;
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164 memnot(aptr, mask, run);
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165 mask += run;
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166 aptr += run;
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167 SDL_memset(xptr, 0, pad);
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168 xptr += pad;
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169 SDL_memset(aptr, ~0, pad);
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170 aptr += pad;
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171 }
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172 pad += run;
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173 for (; i < allowed_y; ++i) {
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174 SDL_memset(xptr, 0, pad);
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175 xptr += pad;
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176 SDL_memset(aptr, ~0, pad);
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177 aptr += pad;
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178 }
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179
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180 /* Create the cursor */
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181 cursor->curs = CreateCursor((HINSTANCE)
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182 GetWindowLongPtr(SDL_Window,
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183 GWLP_HINSTANCE), hot_x,
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184 hot_y, allowed_x, allowed_y, cursor->ands,
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185 cursor->xors);
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186 if (cursor->curs == NULL) {
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187 WIN_FreeWMCursor(NULL, cursor);
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188 SDL_SetError("Windows couldn't create the requested cursor");
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189 return (NULL);
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190 }
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191 return (cursor);
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192 #endif /* USE_STATIC_CURSOR */
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193 }
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194
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195 int
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196 WIN_ShowWMCursor(_THIS, WMcursor * cursor)
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197 {
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198 POINT mouse_pos;
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199
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200 /* The fullscreen cursor must be done in software with DirectInput */
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201 if (!this->screen || DDRAW_FULLSCREEN()) {
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202 return (0);
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203 }
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204
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205 /* Set the window cursor to our cursor, if applicable */
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206 if (cursor != NULL) {
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207 SDL_hcursor = cursor->curs;
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208 } else {
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209 SDL_hcursor = NULL;
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210 }
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211 GetCursorPos(&mouse_pos);
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212 if (PtInRect(&SDL_bounds, mouse_pos)) {
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213 SetCursor(SDL_hcursor);
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214 }
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215 return (1);
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216 }
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217
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218 void
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219 WIN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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220 {
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221 if (DDRAW_FULLSCREEN()) {
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222 SDL_PrivateMouseMotion(0, 0, x, y);
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223 } else if (mouse_relative) {
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224 /* RJR: March 28, 2000
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225 leave physical cursor at center of screen if
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226 mouse hidden and grabbed */
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227 SDL_PrivateMouseMotion(0, 0, x, y);
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228 } else {
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229 POINT pt;
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230 pt.x = x;
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231 pt.y = y;
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232 ClientToScreen(SDL_Window, &pt);
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233 SetCursorPos(pt.x, pt.y);
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234 }
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235 }
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236
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237 /* Update the current mouse state and position */
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238 void
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239 WIN_UpdateMouse(_THIS)
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240 {
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241 RECT rect;
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242 POINT pt;
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243
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244 if (!DDRAW_FULLSCREEN()) {
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245 GetClientRect(SDL_Window, &rect);
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246 GetCursorPos(&pt);
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247 MapWindowPoints(NULL, SDL_Window, &pt, 1);
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248 if (PtInRect(&rect, pt) && (WindowFromPoint(pt) == SDL_Window)) {
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249 SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
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250 SDL_PrivateMouseMotion(0, 0, (Sint16) pt.x, (Sint16) pt.y);
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251 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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252 SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);
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253 }
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254 }
0
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255 }
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256
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257 /* Check to see if we need to enter or leave mouse relative mode */
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258 void
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259 WIN_CheckMouseMode(_THIS)
0
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260 {
1895
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261 #ifndef _WIN32_WCE
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262 /* If the mouse is hidden and input is grabbed, we use relative mode */
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263 if (!(SDL_cursorstate & CURSOR_VISIBLE) &&
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264 (this->input_grab != SDL_GRAB_OFF)) {
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265 mouse_relative = 1;
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266 } else {
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267 mouse_relative = 0;
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268 }
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269 #else
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270 mouse_relative = 0;
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271 #endif
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272 }
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273
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274 /* vi: set ts=4 sw=4 expandtab: */