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annotate src/video/ataricommon/SDL_xbiosinterrupt.S @ 4392:2b8c1aea633b SDL-1.2

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Fixed bug #898 Jeremiah Morris 2009-12-09 16:07:17 PST No-op GlobalToLocal translations in fullscreen mode On my MacBook Pro running 10.6, I noticed a small upward bias on mouse movement in a fullscreen SDL application. The app uses WarpCursor and GetMouseState in a loop to measure relative movement. I tracked it down to NSWindow's convertBaseToScreen: routine, which added a 2-pixel offset on the Y coordinate instead of the expected (+0,+0) translation. In fullscreen mode, QZ_PrivateWarpCursor() does not translate the desired position through QZ_PrivateGlobalToLocal() before passing it to the Core Graphics system. However, QZ_GetMouseLocation() does call the reverse QZ_PrivateLocalToGlobal() even in fullscreen mode. This asymmetry caused problems each time the mouse was moved.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Dec 2009 15:31:37 +0000
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 * XBIOS mouse & joystick vectors
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25 *
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26 * Patrice Mandin
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27 */
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28
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29 .text
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30
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31 .globl _SDL_AtariXbios_Install
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32 .globl _SDL_AtariXbios_Restore
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33 .globl _SDL_AtariXbios_MouseVector
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34 .globl _SDL_AtariXbios_JoystickVector
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35
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36 .globl _SDL_AtariXbios_mouselock
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37 .globl _SDL_AtariXbios_mouseb
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38 .globl _SDL_AtariXbios_mousex
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39 .globl _SDL_AtariXbios_mousey
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40 .globl _SDL_AtariXbios_joystick
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41
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42 /*--- Vector installer ---*/
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43
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44 _SDL_AtariXbios_Install:
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45 movel sp@(4),a0
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46
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47 /* Stop interrupts */
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48
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49 movew #0x2700,sr
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50
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51 /* Save old mouse vector, set our routine */
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52
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53 clrl oldmousevector
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54 movel sp@(8),d0
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55 beqs no_new_mouse_vector
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56 #if defined(__mcoldfire__)
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57 movel a0@(16),d1
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58 movel d1,oldmousevector
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59 #else
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60 movel a0@(16),oldmousevector
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61 #endif
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62 movel d0,a0@(16)
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63 no_new_mouse_vector:
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64
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65 /* Save old joystick vector, set our routine */
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66
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67 clrl oldjoystickvector
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68 movel sp@(12),d0
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69 beqs no_new_joystick_vector
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70 #if defined(__mcoldfire__)
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71 movel a0@(24),d1
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72 movel d1,oldjoystickvector
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73 #else
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74 movel a0@(24),oldjoystickvector
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75 #endif
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76 movel d0,a0@(24)
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77 no_new_joystick_vector:
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78
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79 /* Restart interrupts */
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80
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81 movew #0x2300,sr
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82
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83 rts
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84
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85 /*--- Vector restorer ---*/
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86
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87 _SDL_AtariXbios_Restore:
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88 movel sp@(4),a0
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89
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90 /* Stop interrupts */
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91
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92 movew #0x2700,sr
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93
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94 /* Restore mouse vector */
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95
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96 movel oldmousevector,d0
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97 beqs no_restore_mouse
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98 movel d0,a0@(16)
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99 no_restore_mouse:
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100
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101 /* Restore joystick vector */
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102
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103 movel oldjoystickvector,d0
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104 beqs no_restore_joystick
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105 movel d0,a0@(24)
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106 no_restore_joystick:
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107
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108 /* Restart interrupts */
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109
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110 movew #0x2300,sr
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112 rts
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113
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114 /*--- Our mouse vector ---*/
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115
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116 .text
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117 .even
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118 .ascii "XBRA"
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119 .ascii "LSDL"
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120 .comm oldmousevector,4*1
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121 _SDL_AtariXbios_MouseVector:
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122 #if defined(__mcoldfire__)
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123 lea sp@(-8),sp
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124 moveml d0-d1,sp@
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125 #else
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126 movel d0,sp@-
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127 #endif
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128
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129 /* Mouse buttons */
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130 moveb (a0),d0
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131 #if defined(__mcoldfire__)
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132 andl #3,d0
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133 #else
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134 andw #3,d0
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135 #endif
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136 movew d0,_SDL_AtariXbios_mouseb
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137
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138 /* X movement */
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139 moveb a0@(1),d0
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140 extw d0
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141 #if defined(__mcoldfire__)
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142 movew _SDL_AtariXbios_mousex,d1
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143 addl d1,d0
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144 movew d0,_SDL_AtariXbios_mousex
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145 #else
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146 addw d0,_SDL_AtariXbios_mousex
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147 #endif
305
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148
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149 /* Y movement */
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150 moveb a0@(2),d0
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151 extw d0
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152 #if defined(__mcoldfire__)
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153 movew _SDL_AtariXbios_mousey,d1
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154 addl d1,d0
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155 movew d0,_SDL_AtariXbios_mousey
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156 #else
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157 addw d0,_SDL_AtariXbios_mousey
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158 #endif
305
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159
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160 /* Lock mouse position ? */
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161 tstw _SDL_AtariXbios_mouselock
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162 beq.s no_mouse_lock
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163 clrb a0@(1)
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164 clrb a0@(2)
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165 no_mouse_lock:
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166
305
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167 /* Jump through old vector */
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168 #if defined(__mcoldfire__)
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169 moveml sp@,d0-d1
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170 lea sp@(8),sp
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171 #else
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172 movel sp@+,d0
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173 #endif
305
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174
987
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175 movel oldmousevector,sp@-
305
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176 rts
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177
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178 .data
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179 .even
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180 .comm _SDL_AtariXbios_mouselock,2*1
305
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181 .comm _SDL_AtariXbios_mousex,2*1
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182 .comm _SDL_AtariXbios_mousey,2*1
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183 .comm _SDL_AtariXbios_mouseb,2*1
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184
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185 /*--- Our joystick vector ---*/
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186
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187 .text
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188 .even
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189 .ascii "XBRA"
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190 .ascii "LSDL"
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191 .comm oldjoystickvector,4*1
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192 _SDL_AtariXbios_JoystickVector:
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193 movel d0,sp@-
305
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194
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195 /* New joystick state */
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196 moveb a0@(2),d0
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197 #if defined(__mcoldfire__)
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198 andl #0x8f,d0
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199 #else
305
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200 andw #0x8f,d0
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201 #endif
305
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202 movew d0,_SDL_AtariXbios_joystick
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203
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204 /* Jump through old vector */
987
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205 movel sp@+,d0
305
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206
987
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207 movel oldjoystickvector,sp@-
305
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208 rts
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209
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210 .data
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211 .even
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212 .comm _SDL_AtariXbios_joystick,2*1