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annotate src/video/ps2gs/SDL_gsmouse.c @ 1555:780fd5b61df1

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Fixed bug #89 Date: Sun, 23 Oct 2005 16:39:03 +0200 From: "A. Schmid" <sahib@phreaker.net> Subject: [SDL] no software surfaces with svgalib driver? Hi, I noticed that the SDL (1.2.9) svgalib driver only makes use of linear addressable (framebuffer) video modes. On older systems (like one of mine), linear addressable modes are often not available. Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is unusable, since VESA only supports framebuffering for VBE 2.0 and later. The changes necessary to add support for software surfaces seem to be relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see attached patch). The code worked fine for me, but it is no more than a proof of concept and should be reviewed (probably has a memory leak when switching modes). It also uses the vgagl library (included in the svgalib package) and needs to be linked against it. -Alex
author Sam Lantinga <slouken@libsdl.org>
date Sun, 19 Mar 2006 12:05:16 +0000
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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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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32
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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 }