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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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 <string.h>
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30
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31 #include <AppKit.h>
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32 #include <GameKit.h>
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33
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34 #include "SDL_error.h"
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35 #include "SDL_BWin.h"
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36
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37 extern "C" {
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38
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39 #include "SDL_sysmouse_c.h"
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40
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41 /* Convert bits to padded bytes */
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42 #define PADDED_BITS(bits) ((bits+7)/8)
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43
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44 /* The implementation dependent data for the window manager cursor */
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45 struct WMcursor {
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46 char *bits;
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47 };
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48
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49 /* Can this be done in the BeOS? */
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50 WMcursor *BE_CreateWMCursor(_THIS,
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51 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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52 {
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53 WMcursor *cursor;
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54 int allowed_x;
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55 int allowed_y;
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56 int run, pad, i;
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57 char *cptr;
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58
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59 allowed_x = 16; /* BeOS limitation */
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60 allowed_y = 16; /* BeOS limitation */
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61 if ( (w > allowed_x) || (h > allowed_y) ) {
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62 SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
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63 allowed_x, allowed_y);
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64 return(NULL);
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65 }
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66
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67 /* Allocate the cursor */
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68 cursor = (WMcursor *)malloc(sizeof(WMcursor));
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69 if ( cursor == NULL ) {
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70 SDL_OutOfMemory();
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71 return(NULL);
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72 }
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73 cursor->bits = (char *)malloc(4+2*((allowed_x/8)*allowed_y));
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74 if ( cursor->bits == NULL ) {
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75 free(cursor);
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76 SDL_OutOfMemory();
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77 return(NULL);
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78 }
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79 cursor->bits[0] = allowed_y; /* Size of the cursor */
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80 cursor->bits[1] = 1; /* Bit depth of cursor */
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81 cursor->bits[2] = hot_y;
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82 cursor->bits[3] = hot_x;
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83 cptr = &cursor->bits[4];
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84
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85 /* Pad out to the normal cursor size */
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86 run = PADDED_BITS(w);
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87 pad = PADDED_BITS(allowed_x)-run;
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88 for ( i=0; i<h; ++i ) {
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89 memcpy(cptr, data, run);
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90 memset(cptr+run, 0, pad);
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91 data += run;
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92 cptr += (run+pad);
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93 }
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94 for ( ; i<allowed_y; ++i ) {
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95 memset(cptr, 0, run+pad);
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96 cptr += (run+pad);
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97 }
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98 for ( i=0; i<h; ++i ) {
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99 /* FIXME: The mask should be OR'd with the data to turn
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100 inverted color pixels black, since inverted color pixels
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101 aren't supported under BeOS.
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102 */
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103 memcpy(cptr, mask, run);
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104 memset(cptr+run, 0, pad);
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105 mask += run;
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106 cptr += (run+pad);
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107 }
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108 for ( ; i<allowed_y; ++i ) {
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109 memset(cptr, 0, run+pad);
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110 cptr += (run+pad);
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111 }
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112 return(cursor);
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113 }
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114
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115 int BE_ShowWMCursor(_THIS, WMcursor *cursor)
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116 {
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117 if ( be_app->Lock() ) {
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118 if ( cursor == NULL ) {
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119 if ( SDL_BlankCursor != NULL ) {
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120 be_app->SetCursor(SDL_BlankCursor->bits);
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121 }
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122 } else {
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123 be_app->SetCursor(cursor->bits);
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124 }
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125 be_app->Unlock();
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126 }
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127 return(1);
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128 }
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129
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130 void BE_FreeWMCursor(_THIS, WMcursor *cursor)
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131 {
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132 free(cursor->bits);
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133 free(cursor);
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134 }
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135
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136 /* Implementation by Christian Bauer <cbauer@student.physik.uni-mainz.de> */
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137 void BE_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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138 {
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139 BPoint pt(x, y);
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140 SDL_Win->Lock();
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141 SDL_Win->ConvertToScreen(&pt);
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142 SDL_Win->Unlock();
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143 set_mouse_position((int32)pt.x, (int32)pt.y);
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144 }
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145
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146 }; /* Extern C */
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