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annotate src/video/riscos/SDL_riscosmouse.c @ 1668:4da1ee79c9af SDL-1.3

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more tweaking indent options
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 04:04:35 +0000
parents 782fd950bd46
children
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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
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59 RISCOS_FreeWMCursor(_THIS, WMcursor * cursor)
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60 {
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61 SDL_free(cursor->data);
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62 SDL_free(cursor);
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63 }
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64
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65 WMcursor *
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66 RISCOS_CreateWMCursor(_THIS,
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67 Uint8 * data, Uint8 * mask, int w, int h, int hot_x,
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68 int hot_y)
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69 {
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70 WMcursor *cursor;
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71 Uint8 *cursor_data;
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72 Uint8 *ptr;
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73 int i, j, k;
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74 int data_byte, mask_byte;
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75
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76 /* Check to make sure the cursor size is okay */
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77 if ((w > 32) || (h > 32)) {
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78 SDL_SetError("Only with width and height <= 32 pixels are allowed");
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79 return (NULL);
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80 }
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81
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82 /* Allocate the cursor */
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83 cursor = (WMcursor *) SDL_malloc(sizeof(*cursor));
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84 if (cursor == NULL) {
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85 SDL_SetError("Out of memory");
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86 return (NULL);
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87 }
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88
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89 /* Note: SDL says width must be a multiple of 8 */
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90 cursor_data = SDL_malloc(w / 4 * h);
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91 if (cursor_data == NULL) {
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92 SDL_free(cursor);
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93 SDL_SetError("Out of memory");
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94 return (NULL);
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95 }
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96
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97 cursor->w = w;
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98 cursor->h = h;
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99 cursor->hot_x = hot_x;
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100 cursor->hot_y = hot_y;
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101 cursor->data = cursor_data;
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102
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103
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104 /* Data / Mask Resulting pixel on screen
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105 0 / 1 White
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106 1 / 1 Black
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107 0 / 0 Transparent
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108 1 / 0 Inverted color if possible, black if not.
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109 */
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110 ptr = cursor_data;
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111
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112 for (i = 0; i < h; ++i) {
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113 for (j = 0; j < w / 8; ++j) {
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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 (*ptr) <<= 2;
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120 if (data_byte & 1)
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121 *ptr |= 3; /* Black or inverted */
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122 else if (mask_byte & 1)
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123 *ptr |= 1; /* White */
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124 if ((k & 3) == 3)
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125 ptr--;
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126 data_byte >>= 1;
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127 mask_byte >>= 1;
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128 }
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129
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130 ptr += 3;
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131 data++;
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132 mask++;
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133 }
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134 }
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135
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136 return (cursor);
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137 }
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138
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139 int
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140 RISCOS_ShowWMCursor(_THIS, WMcursor * cursor)
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141 {
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142 current_cursor = cursor;
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143
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144 if (cursor == NULL) {
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145 _kernel_osbyte(106, 0, 0);
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146 defined_cursor = NULL;
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147 } else {
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148 WMcursor *old_cursor = defined_cursor;
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149
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150 if (cursor != defined_cursor) {
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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) {
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165 SDL_SetError("RISCOS couldn't create the cursor to show");
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166 return (0);
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167 }
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168 defined_cursor = cursor;
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169 }
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170
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171 if (old_cursor == NULL) {
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172 /* First time or reshow in window, so save/setup palette */
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173 if (!cursor_palette_saved) {
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174 WIMP_SaveCursorPalette();
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175 }
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176 WIMP_SetSDLCursorPalette();
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177 }
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178
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179 _kernel_osbyte(106, 2, 0);
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180 }
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181
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182 return (1);
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183 }
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184
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185 void
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186 FULLSCREEN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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187 {
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188 Uint8 move_block[5];
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189 int eig_block[3];
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190 _kernel_swi_regs regs;
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191 int os_x, os_y;
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192
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193 eig_block[0] = 4; /* X eig factor */
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194 eig_block[1] = 5; /* Y eig factor */
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195 eig_block[2] = -1; /* End of list of variables to request */
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196
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197 regs.r[0] = (int) eig_block;
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198 regs.r[1] = (int) eig_block;
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199 _kernel_swi(OS_ReadVduVariables, &regs, &regs);
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200
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201 os_x = x << eig_block[0];
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202 os_y = y << eig_block[1];
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203
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204 move_block[0] = 3; /* Move cursor */
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205 move_block[1] = os_x & 0xFF;
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206 move_block[2] = (os_x >> 8) & 0xFF;
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207 move_block[3] = os_y & 0xFF;
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208 move_block[4] = (os_y >> 8) & 0xFF;
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209
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210 _kernel_osword(21, (int *) move_block);
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211 SDL_PrivateMouseMotion(0, 0, x, y);
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212 }
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213
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214
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215 /* Reshow cursor when mouse re-enters the window */
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216 void
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217 WIMP_ReshowCursor(_THIS)
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218 {
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219 defined_cursor = NULL;
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220 cursor_palette_saved = 0;
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221 RISCOS_ShowWMCursor(this, current_cursor);
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222 }
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223
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224 void
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225 WIMP_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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226 {
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227 _kernel_swi_regs regs;
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228 int window_state[9];
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229 char block[5];
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230 int osX, osY;
630
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231
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232 window_state[0] = this->hidden->window_handle;
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233 regs.r[1] = (unsigned int) window_state;
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234 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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235
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236 osX = (x << this->hidden->xeig) + window_state[1];
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237 osY = window_state[4] - (y << this->hidden->yeig);
630
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238
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239 block[0] = 3;
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240 block[1] = osX & 0xFF;
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241 block[2] = (osX >> 8) & 0xFF;
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242 block[3] = osY & 0xFF;
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243 block[4] = (osY >> 8) & 0xFF;
630
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diff changeset
244
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245 regs.r[0] = 21;
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246 regs.r[1] = (int) block;
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247 _kernel_swi(OS_Word, &regs, &regs);
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248 SDL_PrivateMouseMotion(0, 0, x, y);
630
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249 }
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250
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251 int
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252 WIMP_ShowWMCursor(_THIS, WMcursor * cursor)
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253 {
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254 if (mouseInWindow)
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255 return RISCOS_ShowWMCursor(this, cursor);
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256 else
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257 current_cursor = cursor;
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258
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259 return 1;
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260 }
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261
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262 SDL_GrabMode
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263 RISCOS_GrabInput(_THIS, SDL_GrabMode mode)
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264 {
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265 /* In fullscreen mode we don't need to do anything */
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266 if (mode < SDL_GRAB_FULLSCREEN) {
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267 _kernel_swi_regs regs;
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268 unsigned char block[9];
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269 block[0] = 1; /* Define mouse cursor bounding block */
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270
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271 if (mode == SDL_GRAB_OFF) {
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272 /* Clip to whole screen */
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273
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274 int r = (this->hidden->screen_width << this->hidden->xeig) - 1;
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275 int t = (this->hidden->screen_height << this->hidden->yeig) - 1;
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276
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277 block[1] = 0;
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278 block[2] = 0; /* Left */
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279 block[3] = 0;
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280 block[4] = 0; /* Bottom */
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281 block[5] = r & 0xFF;
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282 block[6] = (r >> 8) & 0xFF; /* Right */
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283 block[7] = t & 0xFF;
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284 block[8] = (t >> 8) & 0xFF; /* Top */
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285 } else {
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286 /* Clip to window */
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287 unsigned char window_state[36];
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288
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289 *((int *) window_state) = this->hidden->window_handle;
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290 regs.r[1] = (unsigned int) window_state;
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291 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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292
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293 block[1] = window_state[4];
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294 block[2] = window_state[5];
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295 block[3] = window_state[8];
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296 block[4] = window_state[9];
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297 block[5] = window_state[12];
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298 block[6] = window_state[13];
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299 block[7] = window_state[16];
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300 block[8] = window_state[17];
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301
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302 }
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303
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304 regs.r[0] = 21; /* OS word code */
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305 regs.r[1] = (int) block;
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306 _kernel_swi(OS_Word, &regs, &regs);
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307 }
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308
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309 return mode;
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310 }
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311
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312 /* Save mouse cursor palette to be restore when we are no longer
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313 defining a cursor */
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314
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315 void
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316 WIMP_SaveCursorPalette()
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317 {
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318 _kernel_swi_regs regs;
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319 int colour;
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diff changeset
320
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321 for (colour = 0; colour < 2; colour++) {
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322 regs.r[0] = (int) wimp_cursor_palette[colour][0];
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323 regs.r[1] = 25;
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324 /* Read settings with OS_ReadPalette */
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325 if (_kernel_swi(0x2f, &regs, &regs) == NULL) {
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326 wimp_cursor_palette[colour][2] =
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327 (unsigned char) ((regs.r[2] >> 8) & 0xFF);
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328 wimp_cursor_palette[colour][3] =
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329 (unsigned char) ((regs.r[2] >> 16) & 0xFF);
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330 wimp_cursor_palette[colour][4] =
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331 (unsigned char) ((regs.r[2] >> 24) & 0xFF);
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332 }
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diff changeset
333 }
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diff changeset
334
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335 cursor_palette_saved = 1;
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336 }
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diff changeset
337
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338 /* Restore the WIMP's cursor when we leave the SDL window */
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339 void
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diff changeset
340 WIMP_RestoreWimpCursor()
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341 {
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342 int colour;
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diff changeset
343
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344 /* Reset to pointer shape 1 */
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345 _kernel_osbyte(106, 1, 0);
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346
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347 /* Reset pointer colours */
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348 if (cursor_palette_saved) {
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349 for (colour = 0; colour < 2; colour++) {
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diff changeset
350 _kernel_osword(12, (int *) wimp_cursor_palette[colour]);
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351 }
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352 }
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diff changeset
353 cursor_palette_saved = 0;
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diff changeset
354 }
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diff changeset
355
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diff changeset
356 /* Set palette used for SDL mouse cursors */
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357 void
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diff changeset
358 WIMP_SetSDLCursorPalette()
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diff changeset
359 {
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360 /* First time set up the mouse colours */
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361 Uint8 block[5];
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diff changeset
362
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363 /* Set up colour 1 as white */
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364 block[0] = 1; /* Colour to change 1 - 3 */
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365 block[1] = 25; /* Set pointer colour */
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366 block[2] = 255; /* red component */
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367 block[3] = 255; /* green component */
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368 block[4] = 255; /* blue component */
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diff changeset
369 _kernel_osword(12, (int *) block);
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diff changeset
370
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
371 /* Set colour 3 to back */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
372 block[0] = 3; /* Colour to change 1 - 3 */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
373 block[1] = 25; /* Set pointer colour */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
374 block[2] = 0; /* red component */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
375 block[3] = 0; /* green component */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
376 block[4] = 0; /* blue component */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
377 _kernel_osword(12, (int *) block);
1208
d90b362628ea From: "alan buckley" <alan_baa@hotmail.com>
Sam Lantinga <slouken@libsdl.org>
parents: 1035
diff changeset
378 }
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
379
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
380 /* vi: set ts=4 sw=4 expandtab: */