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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999 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@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #include <stdlib.h>
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29 #include <windows.h>
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30
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31 #include "SDL_error.h"
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32 #include "SDL_mouse.h"
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33 #include "SDL_sysmouse_c.h"
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34 #include "SDL_events_c.h"
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35 #include "SDL_cursor_c.h"
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36 #include "SDL_lowvideo.h"
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37
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38 #ifdef _WIN32_WCE
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39 #define USE_STATIC_CURSOR
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40 #endif
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41
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42 HCURSOR SDL_hcursor = NULL; /* Exported for SDL_eventloop.c */
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43
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44 /* The implementation dependent data for the window manager cursor */
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45 /* For some reason when creating a windows cursor, the ands and xors memory
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46 is not copied, so we need to keep track of it and free it when we are done
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47 with the cursor. If we free the memory prematurely, the app crashes. :-}
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48 */
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49 struct WMcursor {
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50 HCURSOR curs;
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51 #ifndef USE_STATIC_CURSOR
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52 Uint8 *ands;
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53 Uint8 *xors;
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54 #endif
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55 };
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56
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57 /* Convert bits to padded bytes */
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58 #define PAD_BITS(bits) ((bits+7)/8)
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59
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60 #ifdef CURSOR_DEBUG
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61 static void PrintBITMAP(FILE *out, char *bits, int w, int h)
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62 {
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63 int i;
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64 unsigned char ch;
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65
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66 while ( h-- > 0 ) {
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67 for ( i=0; i<w; ++i ) {
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68 if ( (i%8) == 0 )
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69 ch = *bits++;
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70 if ( ch&0x80 )
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71 fprintf(out, "X");
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72 else
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73 fprintf(out, " ");
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74 ch <<= 1;
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75 }
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76 fprintf(out, "\n");
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77 }
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78 }
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79 #endif
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80
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81 #ifndef USE_STATIC_CURSOR
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82 /* Local functions to convert the SDL cursor mask into Windows format */
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83 static void memnot(Uint8 *dst, Uint8 *src, int len)
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84 {
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85 while ( len-- > 0 )
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86 *dst++ = ~*src++;
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87 }
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88 static void memxor(Uint8 *dst, Uint8 *src1, Uint8 *src2, int len)
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89 {
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90 while ( len-- > 0 )
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91 *dst++ = (*src1++)^(*src2++);
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92 }
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93 #endif /* !USE_STATIC_CURSOR */
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94
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95 void 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 != NULL )
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99 DestroyCursor(cursor->curs);
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100 if ( cursor->ands != NULL )
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101 free(cursor->ands);
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102 if ( cursor->xors != NULL )
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103 free(cursor->xors);
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104 #endif /* !USE_STATIC_CURSOR */
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105 free(cursor);
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106 }
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107
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108 WMcursor *WIN_CreateWMCursor(_THIS,
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109 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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110 {
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111 #ifdef USE_STATIC_CURSOR
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112 WMcursor *cursor;
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113
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114 /* Allocate the cursor */
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115 cursor = (WMcursor *)malloc(sizeof(*cursor));
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116 if ( cursor ) {
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117 cursor->curs = LoadCursor(NULL, IDC_ARROW);
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118 }
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119 return(cursor);
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120 #else
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121 WMcursor *cursor;
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122 int allowed_x;
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123 int allowed_y;
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124 int run, pad, i;
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125 Uint8 *aptr, *xptr;
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126
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127 /* Check to make sure the cursor size is okay */
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128 allowed_x = GetSystemMetrics(SM_CXCURSOR);
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129 allowed_y = GetSystemMetrics(SM_CYCURSOR);
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130 if ( (w > allowed_x) || (h > allowed_y) ) {
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131 SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
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132 allowed_x, allowed_y);
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133 return(NULL);
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134 }
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135
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136 /* Allocate the cursor */
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137 cursor = (WMcursor *)malloc(sizeof(*cursor));
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138 if ( cursor == NULL ) {
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139 SDL_SetError("Out of memory");
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140 return(NULL);
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141 }
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142 cursor->curs = NULL;
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143 cursor->ands = NULL;
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144 cursor->xors = NULL;
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145
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146 /* Pad out to the normal cursor size */
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147 run = PAD_BITS(w);
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148 pad = PAD_BITS(allowed_x)-run;
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149 aptr = cursor->ands = (Uint8 *)malloc((run+pad)*allowed_y);
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150 xptr = cursor->xors = (Uint8 *)malloc((run+pad)*allowed_y);
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151 if ( (aptr == NULL) || (xptr == NULL) ) {
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152 WIN_FreeWMCursor(NULL, cursor);
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153 SDL_OutOfMemory();
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154 return(NULL);
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155 }
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156 for ( i=0; i<h; ++i ) {
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157 memxor(xptr, data, mask, run);
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158 xptr += run;
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159 data += run;
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160 memnot(aptr, mask, run);
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161 mask += run;
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162 aptr += run;
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163 memset(xptr, 0, pad);
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164 xptr += pad;
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165 memset(aptr, ~0, pad);
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166 aptr += pad;
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167 }
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168 pad += run;
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169 for ( ; i<allowed_y; ++i ) {
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170 memset(xptr, 0, pad);
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171 xptr += pad;
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172 memset(aptr, ~0, pad);
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173 aptr += pad;
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174 }
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175
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176 /* Create the cursor */
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177 cursor->curs = CreateCursor(
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178 (HINSTANCE)GetWindowLong(SDL_Window, GWL_HINSTANCE),
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179 hot_x, hot_y, allowed_x, allowed_y,
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180 cursor->ands, cursor->xors);
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181 if ( cursor->curs == NULL ) {
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182 WIN_FreeWMCursor(NULL, cursor);
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183 SDL_SetError("Windows couldn't create the requested cursor");
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184 return(NULL);
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185 }
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186 return(cursor);
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187 #endif /* USE_STATIC_CURSOR */
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188 }
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189
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190 int WIN_ShowWMCursor(_THIS, WMcursor *cursor)
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191 {
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192 POINT mouse_pos;
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193
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194 /* The fullscreen cursor must be done in software with DirectInput */
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195 if ( !this->screen || DIRECTX_FULLSCREEN() ) {
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196 return(0);
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197 }
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198
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199 /* Set the window cursor to our cursor, if applicable */
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200 if ( cursor != NULL ) {
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201 SDL_hcursor = cursor->curs;
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202 } else {
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203 SDL_hcursor = NULL;
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204 }
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205 GetCursorPos(&mouse_pos);
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206 if ( PtInRect(&SDL_bounds, mouse_pos) ) {
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207 SetCursor(SDL_hcursor);
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208 }
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209 return(1);
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210 }
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211
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212 void WIN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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213 {
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214 POINT pt;
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215
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216 if ( DIRECTX_FULLSCREEN() ) {
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217 x += (this->screen->offset % this->screen->pitch) /
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218 this->screen->format->BytesPerPixel;
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219 y += (this->screen->offset / this->screen->pitch);
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220 SDL_PrivateMouseMotion(0, 0, x, y);
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221 } else if ( mouse_relative) {
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222 /* RJR: March 28, 2000
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223 leave physical cursor at center of screen if
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224 mouse hidden and grabbed */
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225 SDL_PrivateMouseMotion(0, 0, x, y);
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226 } else {
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227 pt.x = x;
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228 pt.y = y;
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229 ClientToScreen(SDL_Window, &pt);
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230 SetCursorPos(pt.x, pt.y);
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231 }
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232 }
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233
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234 /* Update the current mouse state and position */
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235 void WIN_UpdateMouse(_THIS)
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236 {
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237 RECT rect;
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238 POINT pt;
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239
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240 if ( ! DIRECTX_FULLSCREEN() ) {
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241 GetClientRect(SDL_Window, &rect);
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242 GetCursorPos(&pt);
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243 MapWindowPoints(NULL, SDL_Window, &pt, 1);
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244 if (PtInRect(&rect, pt) && (WindowFromPoint(pt) == SDL_Window)){
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245 SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
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246 SDL_PrivateMouseMotion(0,0, (Sint16)pt.x, (Sint16)pt.y);
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247 } else {
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248 SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);
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249 }
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250 }
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251 }
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252
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253 /* Check to see if we need to enter or leave mouse relative mode */
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254 void WIN_CheckMouseMode(_THIS)
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255 {
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256 /* If the mouse is hidden and input is grabbed, we use relative mode */
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257 if ( !(SDL_cursorstate & CURSOR_VISIBLE) &&
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258 (this->input_grab != SDL_GRAB_OFF) ) {
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259 mouse_relative = 1;
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260 } else {
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261 mouse_relative = 0;
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262 }
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263 }
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