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annotate src/video/ps2gs/SDL_gsmouse.c @ 3954:649fba69eccd SDL-1.2

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Set supervisor as volatile as it is modified from an interrupt
author Patrice Mandin <patmandin@gmail.com>
date Fri, 08 Jun 2007 21:44:40 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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24 #include <sys/ioctl.h>
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25
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26 #include "SDL_mouse.h"
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27 #include "../../events/SDL_events_c.h"
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28 #include "../SDL_cursor_c.h"
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29 #include "SDL_gsvideo.h"
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30 #include "SDL_gsmouse_c.h"
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33 /* The implementation dependent data for the window manager cursor */
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34 struct WMcursor {
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35 int unused;
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36 };
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37
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38 /* There isn't any implementation dependent data */
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39 void GS_FreeWMCursor(_THIS, WMcursor *cursor)
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40 {
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41 return;
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42 }
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43
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44 /* There isn't any implementation dependent data */
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45 WMcursor *GS_CreateWMCursor(_THIS,
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46 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
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47 {
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48 return((WMcursor *)0x01);
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49 }
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50
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51 static void GS_MoveCursor(_THIS, SDL_Cursor *cursor, int x, int y)
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52 {
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53 SDL_Surface *screen;
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54 struct ps2_image image;
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55 SDL_Rect area;
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56 int mouse_y1, mouse_y2;
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57 void *saved_pixels;
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58 int screen_updated;
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59
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60 /* Lock so we don't interrupt an update with mouse motion */
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61 SDL_LockCursor();
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62
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63 /* Make sure any pending DMA has completed */
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64 if ( dma_pending ) {
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65 ioctl(console_fd, PS2IOC_SENDQCT, 1);
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66 dma_pending = 0;
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67 }
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68
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69 /* Remove the cursor image from the DMA area */
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70 screen = this->screen;
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71 saved_pixels = screen->pixels;
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72 screen->pixels = mapped_mem + screen->offset;
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73 screen_updated = 0;
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74 if ( cursor_drawn ) {
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75 SDL_EraseCursorNoLock(screen);
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76 cursor_drawn = 0;
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77 screen_updated = 1;
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78 }
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79
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80 /* Save the current mouse area */
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81 SDL_MouseRect(&area);
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82 mouse_y1 = area.y;
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83 mouse_y2 = area.y+area.h;
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84
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85 /* Only draw the new cursor if there was one passed in */
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86 if ( cursor ) {
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87 /* Set the new location */
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88 cursor->area.x = (x - cursor->hot_x);
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89 cursor->area.y = (y - cursor->hot_y);
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90
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91 /* Draw the cursor at the new location */
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92 if ( (SDL_cursorstate & CURSOR_VISIBLE) && screen->pixels ) {
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93 SDL_DrawCursorNoLock(screen);
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94 cursor_drawn = 1;
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95 screen_updated = 1;
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96 }
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97 }
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98 screen->pixels = saved_pixels;
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99
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100 /* Update the affected area of the screen */
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101 if ( screen_updated ) {
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102 SDL_MouseRect(&area);
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103 if ( area.y < mouse_y1 ) {
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104 mouse_y1 = area.y;
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105 }
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106 if ( (area.y+area.h) > mouse_y2 ) {
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107 mouse_y2 = area.y+area.h;
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108 }
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109 image = screen_image;
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110 image.y += screen->offset / screen->pitch + mouse_y1;
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111 image.h = mouse_y2 - mouse_y1;
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112 image.ptr = mapped_mem +
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113 (image.y - screen_image.y) * screen->pitch;
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114 ioctl(console_fd, PS2IOC_LOADIMAGE, &image);
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115
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116 /* Need to scale offscreen image to TV output */
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117 if ( image.y > 0 ) {
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118 scaleimage_nonblock(console_fd,
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119 tex_tags_mem, scale_tags_mem);
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120 }
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121 }
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122
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123 /* We're finished */
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124 SDL_UnlockCursor();
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125 }
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126
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127 void GS_MoveWMCursor(_THIS, int x, int y)
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128 {
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129 GS_MoveCursor(this, SDL_cursor, x, y);
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130 }
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131
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132 int GS_ShowWMCursor(_THIS, WMcursor *wmcursor)
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133 {
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134 SDL_Cursor *cursor;
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135 int x, y;
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136
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137 /* Draw the cursor at the appropriate location */
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138 SDL_GetMouseState(&x, &y);
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139 if ( wmcursor ) {
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140 cursor = SDL_cursor;
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141 } else {
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142 cursor = NULL;
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143 }
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144 GS_MoveCursor(this, cursor, x, y);
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145 return(1);
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146 }