annotate src/video/bwindow/SDL_sysmouse.cc @ 1642:f1211a4b7380

Fixed bug #189 Clip the overlay destination rectangle to the screen area on X11
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 Apr 2006 05:38:33 +0000
parents 376665398b25
children 782fd950bd46 c121d94672cb 678576473849
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 #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 #include "SDL_sysmouse_c.h"
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32
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33 /* Convert bits to padded bytes */
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34 #define PADDED_BITS(bits) ((bits+7)/8)
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35
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36 /* The implementation dependent data for the window manager cursor */
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37 struct WMcursor {
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38 char *bits;
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39 };
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40
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41 /* Can this be done in the BeOS? */
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42 WMcursor *BE_CreateWMCursor(_THIS,
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43 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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44 {
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45 WMcursor *cursor;
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46 int allowed_x;
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47 int allowed_y;
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48 int run, pad, i;
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49 char *cptr;
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50
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51 allowed_x = 16; /* BeOS limitation */
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52 allowed_y = 16; /* BeOS limitation */
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53 if ( (w > allowed_x) || (h > allowed_y) ) {
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54 SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
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55 allowed_x, allowed_y);
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56 return(NULL);
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57 }
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58
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59 /* Allocate the cursor */
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60 cursor = (WMcursor *)SDL_malloc(sizeof(WMcursor));
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61 if ( cursor == NULL ) {
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62 SDL_OutOfMemory();
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63 return(NULL);
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64 }
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65 cursor->bits = (char *)SDL_malloc(4+2*((allowed_x/8)*allowed_y));
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66 if ( cursor->bits == NULL ) {
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67 SDL_free(cursor);
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68 SDL_OutOfMemory();
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69 return(NULL);
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70 }
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71 cursor->bits[0] = allowed_y; /* Size of the cursor */
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72 cursor->bits[1] = 1; /* Bit depth of cursor */
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73 cursor->bits[2] = hot_y;
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74 cursor->bits[3] = hot_x;
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75 cptr = &cursor->bits[4];
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76
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77 /* Pad out to the normal cursor size */
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78 run = PADDED_BITS(w);
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79 pad = PADDED_BITS(allowed_x)-run;
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80 for ( i=0; i<h; ++i ) {
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81 SDL_memcpy(cptr, data, run);
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82 SDL_memset(cptr+run, 0, pad);
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83 data += run;
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84 cptr += (run+pad);
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85 }
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86 for ( ; i<allowed_y; ++i ) {
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87 SDL_memset(cptr, 0, run+pad);
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88 cptr += (run+pad);
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89 }
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90 for ( i=0; i<h; ++i ) {
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91 /* FIXME: The mask should be OR'd with the data to turn
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92 inverted color pixels black, since inverted color pixels
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93 aren't supported under BeOS.
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94 */
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95 SDL_memcpy(cptr, mask, run);
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96 SDL_memset(cptr+run, 0, pad);
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97 mask += run;
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98 cptr += (run+pad);
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99 }
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100 for ( ; i<allowed_y; ++i ) {
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101 SDL_memset(cptr, 0, run+pad);
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102 cptr += (run+pad);
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103 }
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104 return(cursor);
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105 }
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106
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107 int BE_ShowWMCursor(_THIS, WMcursor *cursor)
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108 {
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109 if ( be_app->Lock() ) {
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110 if ( cursor == NULL ) {
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111 if ( SDL_BlankCursor != NULL ) {
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112 be_app->SetCursor(SDL_BlankCursor->bits);
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113 }
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114 } else {
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115 be_app->SetCursor(cursor->bits);
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116 }
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117 be_app->Unlock();
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118 }
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119 return(1);
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120 }
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121
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122 void BE_FreeWMCursor(_THIS, WMcursor *cursor)
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123 {
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124 SDL_free(cursor->bits);
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125 SDL_free(cursor);
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126 }
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127
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128 /* Implementation by Christian Bauer <cbauer@student.physik.uni-mainz.de> */
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129 void BE_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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130 {
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131 BPoint pt(x, y);
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132 SDL_Win->Lock();
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133 SDL_Win->ConvertToScreen(&pt);
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134 SDL_Win->Unlock();
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135 set_mouse_position((int32)pt.x, (int32)pt.y);
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136 }
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137
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138 }; /* Extern C */