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annotate src/video/bwindow/SDL_sysmouse.cc @ 3169:f294338ca6eb

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author Sam Lantinga <slouken@libsdl.org>
date Sun, 07 Jun 2009 02:45:55 +0000
parents 99210400e8b9
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 #include <AppKit.h>
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25 #include <GameKit.h>
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26
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27 #include "SDL_BWin.h"
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28
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29 extern "C"
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30 {
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31
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32 #include "SDL_sysmouse_c.h"
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33
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34 /* Convert bits to padded bytes */
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35 #define PADDED_BITS(bits) ((bits+7)/8)
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36
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37 /* The implementation dependent data for the window manager cursor */
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38 struct WMcursor
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39 {
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40 char *bits;
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41 };
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42
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43 /* Can this be done in the BeOS? */
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44 WMcursor *BE_CreateWMCursor(_THIS,
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45 Uint8 * data, Uint8 * mask, int w, int h,
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46 int hot_x, int hot_y)
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47 {
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48 WMcursor *cursor;
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49 int allowed_x;
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50 int allowed_y;
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51 int run, pad, i;
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52 char *cptr;
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53
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54 allowed_x = 16; /* BeOS limitation */
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55 allowed_y = 16; /* BeOS limitation */
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56 if ((w > allowed_x) || (h > allowed_y))
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57 {
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58 SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
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59 allowed_x, allowed_y);
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60 return (NULL);
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61 }
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62
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63 /* Allocate the cursor */
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64 cursor = (WMcursor *) SDL_malloc(sizeof(WMcursor));
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65 if (cursor == NULL) {
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66 SDL_OutOfMemory();
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67 return (NULL);
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68 }
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69 cursor->bits =
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70 (char *) SDL_malloc(4 + 2 * ((allowed_x / 8) * allowed_y));
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71 if (cursor->bits == NULL) {
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72 SDL_free(cursor);
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73 SDL_OutOfMemory();
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74 return (NULL);
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75 }
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76 cursor->bits[0] = allowed_y; /* Size of the cursor */
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77 cursor->bits[1] = 1; /* Bit depth of cursor */
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78 cursor->bits[2] = hot_y;
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79 cursor->bits[3] = hot_x;
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80 cptr = &cursor->bits[4];
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81
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82 /* Pad out to the normal cursor size */
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83 run = PADDED_BITS(w);
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84 pad = PADDED_BITS(allowed_x) - run;
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85 for (i = 0; i < h; ++i) {
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86 SDL_memcpy(cptr, data, run);
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87 SDL_memset(cptr + run, 0, pad);
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88 data += run;
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89 cptr += (run + pad);
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90 }
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91 for (; i < allowed_y; ++i) {
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92 SDL_memset(cptr, 0, run + pad);
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93 cptr += (run + pad);
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94 }
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95 for (i = 0; i < h; ++i) {
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96 /* FIXME: The mask should be OR'd with the data to turn
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97 inverted color pixels black, since inverted color pixels
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98 aren't supported under BeOS.
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99 */
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100 SDL_memcpy(cptr, mask, run);
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101 SDL_memset(cptr + run, 0, pad);
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102 mask += run;
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103 cptr += (run + pad);
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104 }
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105 for (; i < allowed_y; ++i) {
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106 SDL_memset(cptr, 0, run + pad);
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107 cptr += (run + pad);
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108 }
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109 return (cursor);
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110 }
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111
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112 int BE_ShowWMCursor(_THIS, WMcursor * cursor)
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113 {
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114 if (be_app->Lock()) {
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115 if (cursor == NULL) {
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116 if (SDL_BlankCursor != NULL) {
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117 be_app->SetCursor(SDL_BlankCursor->bits);
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118 }
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119 } else {
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120 be_app->SetCursor(cursor->bits);
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121 }
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122 be_app->Unlock();
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123 }
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124 return (1);
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125 }
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126
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127 void BE_FreeWMCursor(_THIS, WMcursor * cursor)
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128 {
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129 SDL_free(cursor->bits);
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130 SDL_free(cursor);
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131 }
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132
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133 /* Implementation by Christian Bauer <cbauer@student.physik.uni-mainz.de> */
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134 void BE_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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135 {
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136 BPoint pt(x, y);
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137 SDL_Win->Lock();
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138 SDL_Win->ConvertToScreen(&pt);
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139 SDL_Win->Unlock();
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140 set_mouse_position((int32) pt.x, (int32) pt.y);
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141 }
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142
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143 }; /* Extern C */
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144
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145 /* vi: set ts=4 sw=4 expandtab: */