annotate src/video/riscos/SDL_riscosmouse.c @ 4070:b8f2db95145e SDL-1.2

Patch from Christian Walther Yes, the idea to use a cursor rectangle instead of [NSCursor set] has occurred to me too, and it does seem to be the most elegant way. Here's my attempt at an implementation
author Sam Lantinga <slouken@libsdl.org>
date Sun, 15 Jul 2007 15:58:00 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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@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 /*
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25 File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability
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26 27 March 2003
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27
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28 Implements mouse cursor shape definitions and positioning
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29 */
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30
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31 #include "SDL_mouse.h"
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32 #include "../../events/SDL_events_c.h"
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33
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34 #include "SDL_riscosmouse_c.h"
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35
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36 #include "kernel.h"
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37 #include "swis.h"
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38
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39 static WMcursor *current_cursor = NULL;
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40 static WMcursor *defined_cursor = NULL;
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41
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42 extern int mouseInWindow;
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43
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44 /* Area to save cursor palette colours changed by SDL.
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45 Actual values will be read before we change to the SDL cursor */
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46 static Uint8 wimp_cursor_palette[2][5] = {
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47 {1, 25, 255, 255, 255},
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48 {3, 25, 255, 255, 255}
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49 };
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50
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51 static int cursor_palette_saved = 0;
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52
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53 void WIMP_SaveCursorPalette();
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54 void WIMP_RestoreWimpCursor();
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55 void WIMP_SetSDLCursorPalette();
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56
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57
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58 void RISCOS_FreeWMCursor(_THIS, WMcursor *cursor)
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59 {
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60 SDL_free(cursor->data);
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61 SDL_free(cursor);
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62 }
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63
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64 WMcursor *RISCOS_CreateWMCursor(_THIS,
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65 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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66 {
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67 WMcursor *cursor;
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68 Uint8 *cursor_data;
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69 Uint8 *ptr;
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70 int i,j,k;
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71 int data_byte, mask_byte;
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72
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73 /* Check to make sure the cursor size is okay */
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74 if ( (w > 32) || (h > 32) ) {
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75 SDL_SetError("Only with width and height <= 32 pixels are allowed");
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76 return(NULL);
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77 }
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78
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79 /* Allocate the cursor */
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80 cursor = (WMcursor *)SDL_malloc(sizeof(*cursor));
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81 if ( cursor == NULL ) {
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82 SDL_SetError("Out of memory");
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83 return(NULL);
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84 }
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85
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86 /* Note: SDL says width must be a multiple of 8 */
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87 cursor_data = SDL_malloc(w/4 * h);
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88 if (cursor_data == NULL)
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89 {
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90 SDL_free(cursor);
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91 SDL_SetError("Out of memory");
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92 return(NULL);
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93 }
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94
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95 cursor->w = w;
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96 cursor->h = h;
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97 cursor->hot_x = hot_x;
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98 cursor->hot_y = hot_y;
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99 cursor->data = cursor_data;
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100
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101
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102 /* Data / Mask Resulting pixel on screen
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103 0 / 1 White
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104 1 / 1 Black
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105 0 / 0 Transparent
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106 1 / 0 Inverted color if possible, black if not.
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107 */
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108 ptr = cursor_data;
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109
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110 for ( i=0; i<h; ++i )
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111 {
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112 for (j = 0; j < w/8; ++j)
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113 {
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114 data_byte = *data;
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115 mask_byte = *mask;
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116 *ptr++ = 0; /* Sets whole byte transparent */
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117 *ptr = 0;
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118 for (k = 0; k < 8; k++)
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119 {
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120 (*ptr) <<= 2;
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121 if (data_byte & 1) *ptr |= 3; /* Black or inverted */
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122 else if(mask_byte & 1) *ptr |= 1; /* White */
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123 if ((k&3) == 3) ptr--;
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124 data_byte >>= 1;
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125 mask_byte >>= 1;
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126 }
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127
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128 ptr+=3;
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129 data++;
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130 mask++;
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131 }
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132 }
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133
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134 return(cursor);
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135 }
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136
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137 int RISCOS_ShowWMCursor(_THIS, WMcursor *cursor)
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138 {
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139 current_cursor = cursor;
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140
630
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141 if (cursor == NULL)
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142 {
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143 _kernel_osbyte(106,0,0);
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144 defined_cursor = NULL;
630
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145 } else
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146 {
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147 WMcursor *old_cursor = defined_cursor;
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148
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149 if (cursor != defined_cursor)
630
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150 {
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151 Uint8 cursor_def[10];
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152
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153 cursor_def[0] = 0;
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154 cursor_def[1] = 2; /* Use shape number 2 */
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155 cursor_def[2] = cursor->w/4; /* Width in bytes */
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156 cursor_def[3] = cursor->h; /* Height (h) in pixels */
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157 cursor_def[4] = cursor->hot_x; /* ActiveX in pixels from left */
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158 cursor_def[5] = cursor->hot_y; /* ActiveY in pixels from top */
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159 cursor_def[6] = ((int)(cursor->data) & 0xFF); /* Least significant byte of pointer to data */
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160 cursor_def[7] = ((int)(cursor->data) >> 8) & 0xFF; /* ... */
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161 cursor_def[8] = ((int)(cursor->data) >> 16) & 0xFF; /* ... */
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162 cursor_def[9] = ((int)(cursor->data) >> 24) & 0xFF; /* Most significant byte of pointer to data */
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163
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164 if (_kernel_osword(21, (int *)cursor_def) != 0)
630
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165 {
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166 SDL_SetError("RISCOS couldn't create the cursor to show");
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167 return(0);
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168 }
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169 defined_cursor = cursor;
630
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170 }
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171
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172 if (old_cursor == NULL)
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173 {
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174 /* First time or reshow in window, so save/setup palette */
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175 if (!cursor_palette_saved)
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176 {
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177 WIMP_SaveCursorPalette();
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178 }
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179 WIMP_SetSDLCursorPalette();
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180 }
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181
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182 _kernel_osbyte(106, 2, 0);
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183 }
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184
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185 return(1);
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186 }
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187
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Sam Lantinga <slouken@libsdl.org>
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188 void FULLSCREEN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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189 {
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190 Uint8 move_block[5];
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191 int eig_block[3];
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192 _kernel_swi_regs regs;
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193 int os_x, os_y;
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194
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195 eig_block[0] = 4; /* X eig factor */
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196 eig_block[1] = 5; /* Y eig factor */
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197 eig_block[2] = -1; /* End of list of variables to request */
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198
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199 regs.r[0] = (int)eig_block;
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200 regs.r[1] = (int)eig_block;
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201 _kernel_swi(OS_ReadVduVariables, &regs, &regs);
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202
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203 os_x = x << eig_block[0];
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204 os_y = y << eig_block[1];
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205
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206 move_block[0] = 3; /* Move cursor */
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207 move_block[1] = os_x & 0xFF;
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208 move_block[2] = (os_x >> 8) & 0xFF;
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209 move_block[3] = os_y & 0xFF;
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210 move_block[4] = (os_y >> 8) & 0xFF;
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211
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212 _kernel_osword(21, (int *)move_block);
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213 SDL_PrivateMouseMotion(0, 0, x, y);
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214 }
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parents:
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215
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diff changeset
216
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diff changeset
217 /* Reshow cursor when mouse re-enters the window */
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218 void WIMP_ReshowCursor(_THIS)
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diff changeset
219 {
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220 defined_cursor = NULL;
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221 cursor_palette_saved = 0;
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222 RISCOS_ShowWMCursor(this, current_cursor);
630
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223 }
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
224
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diff changeset
225 void WIMP_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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diff changeset
226 {
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diff changeset
227 _kernel_swi_regs regs;
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Sam Lantinga <slouken@libsdl.org>
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228 int window_state[9];
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
229 char block[5];
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
230 int osX, osY;
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diff changeset
231
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diff changeset
232 window_state[0] = this->hidden->window_handle;
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diff changeset
233 regs.r[1] = (unsigned int)window_state;
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parents:
diff changeset
234 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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235
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
236 osX = (x << this->hidden->xeig) + window_state[1];
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diff changeset
237 osY = window_state[4] - (y << this->hidden->yeig);
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diff changeset
238
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239 block[0] = 3;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
240 block[1] = osX & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
241 block[2] = (osX >> 8) & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
242 block[3] = osY & 0xFF;
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diff changeset
243 block[4] = (osY >> 8) & 0xFF;
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diff changeset
244
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
245 regs.r[0] = 21;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
246 regs.r[1] = (int)block;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
247 _kernel_swi(OS_Word, &regs, &regs);
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diff changeset
248 SDL_PrivateMouseMotion(0, 0, x, y);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
250
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
251 int WIMP_ShowWMCursor(_THIS, WMcursor *cursor)
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diff changeset
252 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
253 if (mouseInWindow) return RISCOS_ShowWMCursor(this, cursor);
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254 else current_cursor = cursor;
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255
630
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diff changeset
256 return 1;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
257 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
258
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
259 SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode)
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parents:
diff changeset
260 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
261 /* In fullscreen mode we don't need to do anything */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
262 if (mode < SDL_GRAB_FULLSCREEN)
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
263 {
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
264 _kernel_swi_regs regs;
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
265 unsigned char block[9];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
266 block[0] = 1; /* Define mouse cursor bounding block */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
267
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
268 if ( mode == SDL_GRAB_OFF )
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
269 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
270 /* Clip to whole screen */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
271
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
272 int r = (this->hidden->screen_width << this->hidden->xeig) - 1;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
273 int t = (this->hidden->screen_height << this->hidden->yeig) - 1;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
274
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
275 block[1] = 0; block[2] = 0; /* Left*/
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
276 block[3] = 0; block[4] = 0; /* Bottom */
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Sam Lantinga <slouken@libsdl.org>
parents:
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277 block[5] = r & 0xFF; block[6] = (r >> 8) & 0xFF; /* Right */
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278 block[7] = t & 0xFF; block[8] = (t >> 8) & 0xFF; /* Top */
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279 } else
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280 {
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281 /* Clip to window */
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282 unsigned char window_state[36];
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283
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284 *((int *)window_state) = this->hidden->window_handle;
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285 regs.r[1] = (unsigned int)window_state;
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286 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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287
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288 block[1] = window_state[4];
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289 block[2] = window_state[5];
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290 block[3] = window_state[8];
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291 block[4] = window_state[9];
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292 block[5] = window_state[12];
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293 block[6] = window_state[13];
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294 block[7] = window_state[16];
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295 block[8] = window_state[17];
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296
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297 }
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298
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299 regs.r[0] = 21; /* OS word code */
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300 regs.r[1] = (int)block;
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301 _kernel_swi(OS_Word, &regs, &regs);
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302 }
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303
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304 return mode;
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305 }
1208
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306
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307 /* Save mouse cursor palette to be restore when we are no longer
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308 defining a cursor */
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309
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310 void WIMP_SaveCursorPalette()
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311 {
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312 _kernel_swi_regs regs;
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313 int colour;
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314
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315 for (colour = 0; colour < 2; colour++)
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316 {
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317 regs.r[0] = (int)wimp_cursor_palette[colour][0];
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318 regs.r[1] = 25;
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319 /* Read settings with OS_ReadPalette */
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320 if (_kernel_swi(0x2f, &regs, &regs) == NULL)
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321 {
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322 wimp_cursor_palette[colour][2] = (unsigned char)((regs.r[2] >> 8) & 0xFF);
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323 wimp_cursor_palette[colour][3] = (unsigned char)((regs.r[2] >> 16) & 0xFF);
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324 wimp_cursor_palette[colour][4] = (unsigned char)((regs.r[2] >> 24) & 0xFF);
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325 }
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326 }
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327
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328 cursor_palette_saved = 1;
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329 }
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330
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331 /* Restore the WIMP's cursor when we leave the SDL window */
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332 void WIMP_RestoreWimpCursor()
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333 {
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334 int colour;
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335
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336 /* Reset to pointer shape 1 */
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337 _kernel_osbyte(106, 1, 0);
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338
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339 /* Reset pointer colours */
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340 if (cursor_palette_saved)
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341 {
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342 for (colour = 0; colour < 2; colour++)
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343 {
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344 _kernel_osword(12, (int *)wimp_cursor_palette[colour]);
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345 }
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346 }
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347 cursor_palette_saved = 0;
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348 }
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349
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350 /* Set palette used for SDL mouse cursors */
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351 void WIMP_SetSDLCursorPalette()
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352 {
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353 /* First time set up the mouse colours */
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354 Uint8 block[5];
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355
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356 /* Set up colour 1 as white */
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357 block[0] = 1; /* Colour to change 1 - 3 */
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358 block[1] = 25; /* Set pointer colour */
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359 block[2] = 255; /* red component*/
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360 block[3] = 255; /* green component */
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361 block[4] = 255; /* blue component*/
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362 _kernel_osword(12, (int *)block);
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363
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364 /* Set colour 3 to back */
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365 block[0] = 3; /* Colour to change 1 - 3 */
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366 block[1] = 25; /* Set pointer colour*/
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367 block[2] = 0; /* red component*/
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368 block[3] = 0; /* green component */
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369 block[4] = 0; /* blue component*/
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370 _kernel_osword(12, (int *)block);
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371 }