Mercurial > sdl-ios-xcode
annotate src/video/riscos/SDL_riscosmouse.c @ 1192:54aa9aa32327
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Fri, 18 Nov 2005 23:39:02 +0100
Subject: [SDL] Mouse position bugs on Mac OS X
The attached patch fixes a few bugs in SDL related to the mouse position
in windowed mode on Mac OS X, reproduced using the attached minimal test
program - at least here on 10.3.9, with SDL CVS from today. Could anyone
test whether the bugs exist and are fixed by the patch on 10.2 and 10.4?
1. When using OpenGL, the vertical mouse positions obtained through
events or SDL_GetMouseState() are off by one.
2. When using OpenGL, SDL_WarpMouse() inverts the y coordinate.
3. Clicks on the topmost pixel row of the window are not recognized.
1 and 2 do not occur in non-OpenGL mode, while 3 does. All three only
occur in windowed mode, not in fullscreen.
The cause for 1 and 3 is that in Cocoa, "the location of the mouse"
seems to be defined as "the location of the top left corner of the mouse
pointer's hot pixel" (this is not documented, it's just what I found out
here), which together with the fact that Cocoa's usual y coordinates
start at the bottom and increase upwards means that the y coordinate of
the mouse runs from 1 to h, not from 0 to h-1, in a window of height h.
If it does work on 10.2 and 10.4 (I'll try to test it as soon as I can,
but at the moment all I have at hand is 10.3.9), can this be applied to
the CVS?
-Christian
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Mon, 28 Nov 2005 10:41:51 +0100
Subject: [SDL] Re: Mouse position bugs on Mac OS X
I wrote:
> I'll try to test it as soon as I can, but at the moment all I have at hand is 10.3.9
So, here are the results of my tests (with patched and unpatched
frameworks compiled with Xcode 1.5 (gcc 3.3) on 10.3.9):
On 10.1.5, my test program doesn't run because of "Undefined symbols:
SDL undefined reference to _CGMainDisplayID expected to be defined in
Carbon". I guess not supporting 10.1 was a deliberate decision then and
that's OK with me.
On 10.2.8, 10.3.9, and 10.4.0, the bugs exist as described in my
original post and are fixed by my patch. That is, there is no difference
between pre/post 10.3 and the patched version works correctly in all
combinations of GL/non-GL and windowed/fullscreen.
I therefore recommend the patch for inclusion.
-Christian
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Mon, 28 Nov 2005 13:58:26 +0000 |
parents | 974ba6ae0fa3 |
children | d90b362628ea |
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 |
630
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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 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 |
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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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146 /* Set colour 3 to back */ |
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147 block[0] = 3; /* Colour to change 1 - 3 */ |
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148 block[1] = 25; /* Set pointer colour*/ |
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149 block[2] = 0; /* red component*/ |
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150 block[3] = 0; /* green component */ |
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151 block[4] = 0; /* blue component*/ |
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152 _kernel_osword(12, (int *)block); |
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153 } |
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154 |
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155 if (cursor != current_cursor) |
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156 { |
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157 Uint8 cursor_def[10]; |
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158 |
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159 cursor_def[0] = 0; |
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160 cursor_def[1] = 2; /* Use shape number 2 */ |
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161 cursor_def[2] = cursor->w/4; /* Width in bytes */ |
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162 cursor_def[3] = cursor->h; /* Height (h) in pixels */ |
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163 cursor_def[4] = cursor->hot_x; /* ActiveX in pixels from left */ |
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164 cursor_def[5] = cursor->hot_y; /* ActiveY in pixels from top */ |
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165 cursor_def[6] = ((int)(cursor->data) & 0xFF); /* Least significant byte of pointer to data */ |
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166 cursor_def[7] = ((int)(cursor->data) >> 8) & 0xFF; /* ... */ |
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167 cursor_def[8] = ((int)(cursor->data) >> 16) & 0xFF; /* ... */ |
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168 cursor_def[9] = ((int)(cursor->data) >> 24) & 0xFF; /* Most significant byte of pointer to data */ |
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169 |
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170 if (_kernel_osword(21, (int *)cursor_def) == 0) |
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171 { |
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172 SDL_SetError("RISCOS couldn't create the cursor to show"); |
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173 return(0); |
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174 } |
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175 current_cursor = cursor; |
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176 } |
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177 |
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178 if ((this->screen->flags & SDL_FULLSCREEN) || mouseInWindow) _kernel_osbyte(106, 2, 0); |
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179 } |
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180 |
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181 return(1); |
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182 } |
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183 |
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184 void FULLSCREEN_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
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185 { |
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186 Uint8 move_block[5]; |
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187 int eig_block[3]; |
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188 _kernel_swi_regs regs; |
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189 int os_x, os_y; |
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190 |
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191 eig_block[0] = 4; /* X eig factor */ |
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192 eig_block[1] = 5; /* Y eig factor */ |
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193 eig_block[2] = -1; /* End of list of variables to request */ |
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194 |
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195 regs.r[0] = (int)eig_block; |
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196 regs.r[1] = (int)eig_block; |
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197 _kernel_swi(OS_ReadVduVariables, ®s, ®s); |
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198 |
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199 os_x = x << eig_block[0]; |
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200 os_y = y << eig_block[1]; |
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201 |
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202 move_block[0] = 3; /* Move cursor */ |
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203 move_block[1] = os_x & 0xFF; |
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204 move_block[2] = (os_x >> 8) & 0xFF; |
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205 move_block[3] = os_y & 0xFF; |
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206 move_block[4] = (os_y >> 8) & 0xFF; |
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207 |
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208 _kernel_osword(21, (int *)move_block); |
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209 SDL_PrivateMouseMotion(0, 0, x, y); |
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210 } |
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211 |
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212 |
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213 /* Reshow cursor when mouse re-enters the window */ |
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214 void WIMP_ReshowCursor(_THIS) |
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215 { |
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216 WMcursor *cursor = current_cursor; |
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217 current_cursor = NULL; |
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218 RISCOS_ShowWMCursor(this, cursor); |
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219 } |
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220 |
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221 extern int mouseInWindow; |
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222 |
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223 void WIMP_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
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224 { |
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225 _kernel_swi_regs regs; |
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226 int window_state[9]; |
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227 char block[5]; |
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228 int osX, osY; |
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229 |
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230 window_state[0] = this->hidden->window_handle; |
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231 regs.r[1] = (unsigned int)window_state; |
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232 _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
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233 |
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234 osX = (x << this->hidden->xeig) + window_state[1]; |
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235 osY = window_state[4] - (y << this->hidden->yeig); |
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236 |
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237 block[0] = 3; |
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238 block[1] = osX & 0xFF; |
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239 block[2] = (osX >> 8) & 0xFF; |
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240 block[3] = osY & 0xFF; |
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241 block[4] = (osY >> 8) & 0xFF; |
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242 |
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243 regs.r[0] = 21; |
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244 regs.r[1] = (int)block; |
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245 _kernel_swi(OS_Word, ®s, ®s); |
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246 SDL_PrivateMouseMotion(0, 0, x, y); |
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247 } |
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248 |
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249 int WIMP_ShowWMCursor(_THIS, WMcursor *cursor) |
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250 { |
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251 if (mouseInWindow) return RISCOS_ShowWMCursor(this, cursor); |
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252 return 1; |
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253 } |
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254 |
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255 SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode) |
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256 { |
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257 /* In fullscreen mode we don't need to do anything */ |
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258 if (mode < SDL_GRAB_FULLSCREEN) |
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259 { |
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260 _kernel_swi_regs regs; |
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261 unsigned char block[9]; |
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262 block[0] = 1; /* Define mouse cursor bounding block */ |
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263 |
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264 if ( mode == SDL_GRAB_OFF ) |
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265 { |
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266 /* Clip to whole screen */ |
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267 |
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268 int r = (this->hidden->screen_width << this->hidden->xeig) - 1; |
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269 int t = (this->hidden->screen_height << this->hidden->yeig) - 1; |
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270 |
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271 block[1] = 0; block[2] = 0; /* Left*/ |
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272 block[3] = 0; block[4] = 0; /* Bottom */ |
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273 block[5] = r & 0xFF; block[6] = (r >> 8) & 0xFF; /* Right */ |
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274 block[7] = t & 0xFF; block[8] = (t >> 8) & 0xFF; /* Top */ |
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275 } else |
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276 { |
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277 /* Clip to window */ |
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278 unsigned char window_state[36]; |
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279 |
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280 *((int *)window_state) = this->hidden->window_handle; |
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281 regs.r[1] = (unsigned int)window_state; |
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282 _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
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283 |
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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, ®s, ®s); |
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298 } |
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299 |
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300 return mode; |
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301 } |