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annotate src/video/riscos/SDL_riscosmouse.c @ 630:550bccdf04bd

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Added initial support for RISC OS (thanks Peter Naulls!)
author Sam Lantinga <slouken@libsdl.org>
date Thu, 29 May 2003 04:44:13 +0000
parents
children b8d311d90021
rev   line source
630
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 /*
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24 File added by Alan Buckley (alan_baa@hotmail.com) for RISCOS 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
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44 extern int mouseInWindow;
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45
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46 void RISCOS_FreeWMCursor(_THIS, WMcursor *cursor)
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47 {
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48 free(cursor->data);
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49 free(cursor);
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50 }
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51
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52 WMcursor *RISCOS_CreateWMCursor(_THIS,
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53 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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54 {
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55 WMcursor *cursor;
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56 Uint8 *cursor_data;
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57 Uint8 *ptr;
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58 int i,j,k;
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59 int data_byte, mask_byte;
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60
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61 /* Check to make sure the cursor size is okay */
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62 if ( (w > 32) || (h > 32) ) {
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63 SDL_SetError("Only with width and height <= 32 pixels are allowed");
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64 return(NULL);
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65 }
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66
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67 /* Allocate the cursor */
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68 cursor = (WMcursor *)malloc(sizeof(*cursor));
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69 if ( cursor == NULL ) {
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70 SDL_SetError("Out of memory");
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71 return(NULL);
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72 }
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73
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74 /* Note: SDL says width must be a multiple of 8 */
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75 cursor_data = malloc(w/4 * h);
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76 if (cursor_data == NULL)
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77 {
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78 free(cursor);
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79 SDL_SetError("Out of memory");
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80 return(NULL);
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81 }
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82
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83 cursor->w = w;
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84 cursor->h = h;
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85 cursor->hot_x = hot_x;
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86 cursor->hot_y = hot_y;
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87 cursor->data = cursor_data;
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88
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89
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90 /* Data / Mask Resulting pixel on screen
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91 0 / 1 White
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92 1 / 1 Black
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93 0 / 0 Transparent
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94 1 / 0 Inverted color if possible, black if not.
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95 */
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96 ptr = cursor_data;
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97
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98 for ( i=0; i<h; ++i )
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99 {
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100 for (j = 0; j < w/8; ++j)
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101 {
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102 data_byte = *data;
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103 mask_byte = *mask;
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104 *ptr++ = 0; /* Sets whole byte transparent */
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105 *ptr = 0;
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106 for (k = 0; k < 8; k++)
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107 {
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108 (*ptr) <<= 2;
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109 if (data_byte & 1) *ptr |= 3; /* Black or inverted */
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110 else if(mask_byte & 1) *ptr |= 1; /* White */
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111 if ((k&3) == 3) ptr--;
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112 data_byte >>= 1;
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113 mask_byte >>= 1;
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114 }
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115
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116 ptr+=3;
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117 data++;
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118 mask++;
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119 }
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120 }
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121
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122 return(cursor);
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123 }
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124
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125 int RISCOS_ShowWMCursor(_THIS, WMcursor *cursor)
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126 {
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127 if (cursor == NULL)
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128 {
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129 _kernel_osbyte(106,0,0);
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130 current_cursor = NULL;
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131 } else
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132 {
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133 if (current_cursor == NULL)
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134 {
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135 /* First time set up the mouse colours */
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136 Uint8 block[5];
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137
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138 /* Set up colour 1 as white */
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139 block[0] = 1; /* Colour to change 1 - 3 */
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140 block[1] = 25; /* Set pointer colour */
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141 block[2] = 255; /* red component*/
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142 block[3] = 255; /* green component */
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143 block[4] = 255; /* blue component*/
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144 _kernel_osword(12, (int *)block);
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145
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
146 /* Set colour 3 to back */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
147 block[0] = 3; /* Colour to change 1 - 3 */
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parents:
diff changeset
148 block[1] = 25; /* Set pointer colour*/
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
149 block[2] = 0; /* red component*/
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
150 block[3] = 0; /* green component */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
151 block[4] = 0; /* blue component*/
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
152 _kernel_osword(12, (int *)block);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
153 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
154
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
155 if (cursor != current_cursor)
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
156 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
157 Uint8 cursor_def[10];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
158
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
159 cursor_def[0] = 0;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
160 cursor_def[1] = 2; /* Use shape number 2 */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161 cursor_def[2] = cursor->w/4; /* Width in bytes */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
162 cursor_def[3] = cursor->h; /* Height (h) in pixels */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
163 cursor_def[4] = cursor->hot_x; /* ActiveX in pixels from left */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
164 cursor_def[5] = cursor->hot_y; /* ActiveY in pixels from top */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
165 cursor_def[6] = ((int)(cursor->data) & 0xFF); /* Least significant byte of pointer to data */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
166 cursor_def[7] = ((int)(cursor->data) >> 8) & 0xFF; /* ... */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
167 cursor_def[8] = ((int)(cursor->data) >> 16) & 0xFF; /* ... */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
168 cursor_def[9] = ((int)(cursor->data) >> 24) & 0xFF; /* Most significant byte of pointer to data */
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parents:
diff changeset
169
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
170 if (_kernel_osword(21, (int *)cursor_def) == 0)
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parents:
diff changeset
171 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
172 SDL_SetError("RISCOS couldn't create the cursor to show");
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parents:
diff changeset
173 return(0);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
174 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
175 current_cursor = cursor;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
176 }
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Sam Lantinga <slouken@libsdl.org>
parents:
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177
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
178 if ((this->screen->flags & SDL_FULLSCREEN) || mouseInWindow) _kernel_osbyte(106, 2, 0);
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parents:
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179 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
180
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
181 return(1);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
182 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
183
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
184 void FULLSCREEN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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Sam Lantinga <slouken@libsdl.org>
parents:
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185 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
186 Uint8 move_block[5];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
187 int eig_block[3];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
188 _kernel_swi_regs regs;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
189 int os_x, os_y;
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parents:
diff changeset
190
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
191 eig_block[0] = 4; /* X eig factor */
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parents:
diff changeset
192 eig_block[1] = 5; /* Y eig factor */
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parents:
diff changeset
193 eig_block[2] = -1; /* End of list of variables to request */
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194
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
195 regs.r[0] = (int)eig_block;
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parents:
diff changeset
196 regs.r[1] = (int)eig_block;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
197 _kernel_swi(OS_ReadVduVariables, &regs, &regs);
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198
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
199 os_x = x << eig_block[0];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
200 os_y = y << eig_block[1];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
201
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
202 move_block[0] = 3; /* Move cursor */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
203 move_block[1] = os_x & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
204 move_block[2] = (os_x >> 8) & 0xFF;
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parents:
diff changeset
205 move_block[3] = os_y & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
206 move_block[4] = (os_y >> 8) & 0xFF;
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parents:
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207
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
208 _kernel_osword(21, (int *)move_block);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
209 SDL_PrivateMouseMotion(0, 0, x, y);
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Sam Lantinga <slouken@libsdl.org>
parents:
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210 }
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parents:
diff changeset
211
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parents:
diff changeset
212
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
213 /* Reshow cursor when mouse re-enters the window */
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
214 void WIMP_ReshowCursor(_THIS)
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215 {
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216 WMcursor *cursor = current_cursor;
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diff changeset
217 current_cursor = NULL;
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Sam Lantinga <slouken@libsdl.org>
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218 RISCOS_ShowWMCursor(this, cursor);
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Sam Lantinga <slouken@libsdl.org>
parents:
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219 }
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220
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
221 extern int mouseInWindow;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
222
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
223 void WIMP_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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parents:
diff changeset
224 {
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parents:
diff changeset
225 _kernel_swi_regs regs;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
226 int window_state[9];
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
227 char block[5];
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
228 int osX, osY;
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diff changeset
229
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
230 window_state[0] = this->hidden->window_handle;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
231 regs.r[1] = (unsigned int)window_state;
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diff changeset
232 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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diff changeset
233
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
234 osX = (x << this->hidden->xeig) + window_state[1];
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parents:
diff changeset
235 osY = window_state[4] - (y << this->hidden->yeig);
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parents:
diff changeset
236
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
237 block[0] = 3;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
238 block[1] = osX & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239 block[2] = (osX >> 8) & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
240 block[3] = osY & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
241 block[4] = (osY >> 8) & 0xFF;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
242
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243 regs.r[0] = 21;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 regs.r[1] = (int)block;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245 _kernel_swi(OS_Word, &regs, &regs);
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
246 SDL_PrivateMouseMotion(0, 0, x, y);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
248
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 int WIMP_ShowWMCursor(_THIS, WMcursor *cursor)
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parents:
diff changeset
250 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
251 if (mouseInWindow) return RISCOS_ShowWMCursor(this, cursor);
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parents:
diff changeset
252 return 1;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
253 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
255 SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode)
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
256 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
257 /* In fullscreen mode we don't need to do anything */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
258 if (mode < SDL_GRAB_FULLSCREEN)
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
259 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
260 _kernel_swi_regs regs;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
261 unsigned char block[9];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
262 block[0] = 1; /* Define mouse cursor bounding block */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
263
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
264 if ( mode == SDL_GRAB_OFF )
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
265 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
266 /* Clip to whole screen */
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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 int r = (this->hidden->screen_width << this->hidden->xeig) - 1;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
269 int t = (this->hidden->screen_height << this->hidden->yeig) - 1;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
270
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
271 block[1] = 0; block[2] = 0; /* Left*/
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
272 block[3] = 0; block[4] = 0; /* Bottom */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
273 block[5] = r & 0xFF; block[6] = (r >> 8) & 0xFF; /* Right */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
274 block[7] = t & 0xFF; block[8] = (t >> 8) & 0xFF; /* Top */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
275 } else
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
276 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
277 /* Clip to window */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
278 unsigned char window_state[36];
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
279
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
280 *((int *)window_state) = this->hidden->window_handle;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
281 regs.r[1] = (unsigned int)window_state;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
282 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
283
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
284 block[1] = window_state[4];
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285 block[2] = window_state[5];
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286 block[3] = window_state[8];
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287 block[4] = window_state[9];
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288 block[5] = window_state[12];
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289 block[6] = window_state[13];
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290 block[7] = window_state[16];
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291 block[8] = window_state[17];
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292
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293 }
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294
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295 regs.r[0] = 21; /* OS word code */
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296 regs.r[1] = (int)block;
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297 _kernel_swi(OS_Word, &regs, &regs);
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298 }
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299
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300 return mode;
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301 }