annotate src/video/riscos/SDL_riscosmouse.c @ 1312:c9b51268668f

Updated copyright information and removed rcs id lines (problematic in branch merges) I batch edited these files, so please let me know if I've accidentally removed anybody's credit here.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 01 Feb 2006 06:32:25 +0000
parents d90b362628ea
children 3692456e7b0f
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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
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23 /*
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24 File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability
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25 27 March 2003
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26
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27 Implements mouse cursor shape definitions and positioning
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28 */
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29
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30 #include <stdio.h>
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31 #include <stdlib.h>
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32
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33 #include "SDL_error.h"
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34 #include "SDL_mouse.h"
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35 #include "SDL_events_c.h"
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36
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37 #include "SDL_riscosmouse_c.h"
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38
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39 #include "kernel.h"
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40 #include "swis.h"
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41
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42 static WMcursor *current_cursor = NULL;
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43 static WMcursor *defined_cursor = NULL;
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44
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45 extern int mouseInWindow;
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46
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47 /* Area to save cursor palette colours changed by SDL.
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48 Actual values will be read before we change to the SDL cursor */
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49 static Uint8 wimp_cursor_palette[2][5] = {
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50 {1, 25, 255, 255, 255},
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51 {3, 25, 255, 255, 255}
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52 };
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53
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54 static int cursor_palette_saved = 0;
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55
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56 void WIMP_SaveCursorPalette();
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57 void WIMP_RestoreWimpCursor();
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58 void WIMP_SetSDLCursorPalette();
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59
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60
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61 void RISCOS_FreeWMCursor(_THIS, WMcursor *cursor)
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62 {
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63 free(cursor->data);
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64 free(cursor);
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65 }
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66
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67 WMcursor *RISCOS_CreateWMCursor(_THIS,
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68 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, 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 *)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 = malloc(w/4 * h);
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91 if (cursor_data == NULL)
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92 {
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93 free(cursor);
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94 SDL_SetError("Out of memory");
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95 return(NULL);
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96 }
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97
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98 cursor->w = w;
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99 cursor->h = h;
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100 cursor->hot_x = hot_x;
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101 cursor->hot_y = hot_y;
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102 cursor->data = cursor_data;
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103
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104
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105 /* Data / Mask Resulting pixel on screen
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106 0 / 1 White
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107 1 / 1 Black
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108 0 / 0 Transparent
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109 1 / 0 Inverted color if possible, black if not.
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110 */
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111 ptr = cursor_data;
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112
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113 for ( i=0; i<h; ++i )
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114 {
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115 for (j = 0; j < w/8; ++j)
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116 {
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117 data_byte = *data;
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118 mask_byte = *mask;
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119 *ptr++ = 0; /* Sets whole byte transparent */
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120 *ptr = 0;
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121 for (k = 0; k < 8; k++)
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122 {
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123 (*ptr) <<= 2;
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124 if (data_byte & 1) *ptr |= 3; /* Black or inverted */
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125 else if(mask_byte & 1) *ptr |= 1; /* White */
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126 if ((k&3) == 3) ptr--;
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127 data_byte >>= 1;
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128 mask_byte >>= 1;
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129 }
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130
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131 ptr+=3;
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132 data++;
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133 mask++;
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134 }
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135 }
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136
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137 return(cursor);
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138 }
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139
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140 int 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 {
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146 _kernel_osbyte(106,0,0);
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147 defined_cursor = NULL;
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148 } else
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149 {
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150 WMcursor *old_cursor = defined_cursor;
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151
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152 if (cursor != defined_cursor)
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153 {
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154 Uint8 cursor_def[10];
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155
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156 cursor_def[0] = 0;
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157 cursor_def[1] = 2; /* Use shape number 2 */
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158 cursor_def[2] = cursor->w/4; /* Width in bytes */
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159 cursor_def[3] = cursor->h; /* Height (h) in pixels */
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160 cursor_def[4] = cursor->hot_x; /* ActiveX in pixels from left */
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161 cursor_def[5] = cursor->hot_y; /* ActiveY in pixels from top */
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162 cursor_def[6] = ((int)(cursor->data) & 0xFF); /* Least significant byte of pointer to data */
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163 cursor_def[7] = ((int)(cursor->data) >> 8) & 0xFF; /* ... */
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164 cursor_def[8] = ((int)(cursor->data) >> 16) & 0xFF; /* ... */
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165 cursor_def[9] = ((int)(cursor->data) >> 24) & 0xFF; /* Most significant byte of pointer to data */
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166
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167 if (_kernel_osword(21, (int *)cursor_def) != 0)
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168 {
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169 SDL_SetError("RISCOS couldn't create the cursor to show");
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170 return(0);
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171 }
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172 defined_cursor = cursor;
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173 }
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174
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175 if (old_cursor == NULL)
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176 {
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177 /* First time or reshow in window, so save/setup palette */
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178 if (!cursor_palette_saved)
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179 {
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180 WIMP_SaveCursorPalette();
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181 }
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182 WIMP_SetSDLCursorPalette();
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183 }
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184
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185 _kernel_osbyte(106, 2, 0);
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186 }
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187
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188 return(1);
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189 }
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190
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191 void FULLSCREEN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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192 {
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193 Uint8 move_block[5];
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194 int eig_block[3];
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195 _kernel_swi_regs regs;
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196 int os_x, os_y;
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197
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198 eig_block[0] = 4; /* X eig factor */
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199 eig_block[1] = 5; /* Y eig factor */
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200 eig_block[2] = -1; /* End of list of variables to request */
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201
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202 regs.r[0] = (int)eig_block;
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203 regs.r[1] = (int)eig_block;
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204 _kernel_swi(OS_ReadVduVariables, &regs, &regs);
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205
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206 os_x = x << eig_block[0];
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207 os_y = y << eig_block[1];
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208
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209 move_block[0] = 3; /* Move cursor */
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210 move_block[1] = os_x & 0xFF;
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211 move_block[2] = (os_x >> 8) & 0xFF;
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212 move_block[3] = os_y & 0xFF;
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213 move_block[4] = (os_y >> 8) & 0xFF;
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214
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215 _kernel_osword(21, (int *)move_block);
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216 SDL_PrivateMouseMotion(0, 0, x, y);
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217 }
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218
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219
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220 /* Reshow cursor when mouse re-enters the window */
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221 void WIMP_ReshowCursor(_THIS)
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222 {
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223 defined_cursor = NULL;
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224 cursor_palette_saved = 0;
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225 RISCOS_ShowWMCursor(this, current_cursor);
630
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226 }
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227
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228 void WIMP_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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229 {
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230 _kernel_swi_regs regs;
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231 int window_state[9];
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232 char block[5];
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233 int osX, osY;
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234
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235 window_state[0] = this->hidden->window_handle;
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236 regs.r[1] = (unsigned int)window_state;
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237 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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238
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239 osX = (x << this->hidden->xeig) + window_state[1];
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240 osY = window_state[4] - (y << this->hidden->yeig);
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241
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242 block[0] = 3;
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243 block[1] = osX & 0xFF;
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244 block[2] = (osX >> 8) & 0xFF;
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245 block[3] = osY & 0xFF;
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246 block[4] = (osY >> 8) & 0xFF;
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247
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248 regs.r[0] = 21;
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249 regs.r[1] = (int)block;
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250 _kernel_swi(OS_Word, &regs, &regs);
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251 SDL_PrivateMouseMotion(0, 0, x, y);
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252 }
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253
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254 int WIMP_ShowWMCursor(_THIS, WMcursor *cursor)
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diff changeset
255 {
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diff changeset
256 if (mouseInWindow) return RISCOS_ShowWMCursor(this, cursor);
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257 else current_cursor = cursor;
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258
630
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259 return 1;
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diff changeset
260 }
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261
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diff changeset
262 SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode)
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diff changeset
263 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
264 /* In fullscreen mode we don't need to do anything */
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
265 if (mode < SDL_GRAB_FULLSCREEN)
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parents:
diff changeset
266 {
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diff changeset
267 _kernel_swi_regs regs;
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diff changeset
268 unsigned char block[9];
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diff changeset
269 block[0] = 1; /* Define mouse cursor bounding block */
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270
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
271 if ( mode == SDL_GRAB_OFF )
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parents:
diff changeset
272 {
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diff changeset
273 /* Clip to whole screen */
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diff changeset
274
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diff changeset
275 int r = (this->hidden->screen_width << this->hidden->xeig) - 1;
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diff changeset
276 int t = (this->hidden->screen_height << this->hidden->yeig) - 1;
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diff changeset
277
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diff changeset
278 block[1] = 0; block[2] = 0; /* Left*/
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279 block[3] = 0; block[4] = 0; /* Bottom */
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280 block[5] = r & 0xFF; block[6] = (r >> 8) & 0xFF; /* Right */
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281 block[7] = t & 0xFF; block[8] = (t >> 8) & 0xFF; /* Top */
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282 } else
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283 {
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284 /* Clip to window */
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285 unsigned char window_state[36];
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286
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287 *((int *)window_state) = this->hidden->window_handle;
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288 regs.r[1] = (unsigned int)window_state;
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289 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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290
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291 block[1] = window_state[4];
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292 block[2] = window_state[5];
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293 block[3] = window_state[8];
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294 block[4] = window_state[9];
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295 block[5] = window_state[12];
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296 block[6] = window_state[13];
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297 block[7] = window_state[16];
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298 block[8] = window_state[17];
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299
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300 }
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301
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302 regs.r[0] = 21; /* OS word code */
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303 regs.r[1] = (int)block;
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304 _kernel_swi(OS_Word, &regs, &regs);
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305 }
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306
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307 return mode;
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308 }
1208
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309
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310 /* Save mouse cursor palette to be restore when we are no longer
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311 defining a cursor */
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312
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313 void WIMP_SaveCursorPalette()
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314 {
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315 _kernel_swi_regs regs;
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316 int colour;
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317
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318 for (colour = 0; colour < 2; colour++)
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319 {
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320 regs.r[0] = (int)wimp_cursor_palette[colour][0];
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321 regs.r[1] = 25;
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322 /* Read settings with OS_ReadPalette */
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323 if (_kernel_swi(0x2f, &regs, &regs) == NULL)
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324 {
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325 wimp_cursor_palette[colour][2] = (unsigned char)((regs.r[2] >> 8) & 0xFF);
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326 wimp_cursor_palette[colour][3] = (unsigned char)((regs.r[2] >> 16) & 0xFF);
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327 wimp_cursor_palette[colour][4] = (unsigned char)((regs.r[2] >> 24) & 0xFF);
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328 }
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329 }
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330
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331 cursor_palette_saved = 1;
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332 }
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333
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334 /* Restore the WIMP's cursor when we leave the SDL window */
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335 void WIMP_RestoreWimpCursor()
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336 {
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337 int colour;
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338
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339 /* Reset to pointer shape 1 */
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340 _kernel_osbyte(106, 1, 0);
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341
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342 /* Reset pointer colours */
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343 if (cursor_palette_saved)
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344 {
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345 for (colour = 0; colour < 2; colour++)
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346 {
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347 _kernel_osword(12, (int *)wimp_cursor_palette[colour]);
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348 }
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349 }
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350 cursor_palette_saved = 0;
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351 }
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352
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353 /* Set palette used for SDL mouse cursors */
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354 void WIMP_SetSDLCursorPalette()
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355 {
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356 /* First time set up the mouse colours */
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357 Uint8 block[5];
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358
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359 /* Set up colour 1 as white */
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360 block[0] = 1; /* Colour to change 1 - 3 */
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361 block[1] = 25; /* Set pointer colour */
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362 block[2] = 255; /* red component*/
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363 block[3] = 255; /* green component */
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364 block[4] = 255; /* blue component*/
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365 _kernel_osword(12, (int *)block);
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366
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367 /* Set colour 3 to back */
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368 block[0] = 3; /* Colour to change 1 - 3 */
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369 block[1] = 25; /* Set pointer colour*/
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370 block[2] = 0; /* red component*/
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371 block[3] = 0; /* green component */
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372 block[4] = 0; /* blue component*/
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373 _kernel_osword(12, (int *)block);
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374 }