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