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annotate src/video/cybergfx/SDL_cgxyuv.c @ 1076:8d3b95ece376

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[PATCH] SDL_GetVideoMode() do not find the best video mode The current GetVideoMode() function stops at the first mode which has any dimensions smaller than the one asked, and gives the previous in the list. If I ask 336x224 with this list: 768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200 SDL will give me 640x400, because 640x200 as height smaller than what I asked. However the best mode is the smaller which has both dimensions bigger than the one asked (384x240 in my example). This patch fixes this, plus it does not rely on a sorted video mode list.
author Patrice Mandin <patmandin@gmail.com>
date Sun, 12 Jun 2005 16:12:55 +0000
parents b8d311d90021
children c9b51268668f
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
21
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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@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* This is the XFree86 Xv extension implementation of YUV video overlays */
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29
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30 #ifdef XFREE86_XV
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31
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32 #include <stdlib.h>
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33 #include <string.h>
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34 #include <X11/Xlib.h>
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35 #include <sys/ipc.h>
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36 #include <sys/shm.h>
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37 #include <X11/extensions/XShm.h>
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38 #include <X11/extensions/Xvlib.h>
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39
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40 #include "SDL_error.h"
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41 #include "SDL_video.h"
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42 #include "SDL_x11yuv_c.h"
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43 #include "SDL_yuvfuncs.h"
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44
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45 /* The functions used to manipulate software video overlays */
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46 static struct private_yuvhwfuncs x11_yuvfuncs = {
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47 X11_LockYUVOverlay,
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48 X11_UnlockYUVOverlay,
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49 X11_DisplayYUVOverlay,
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50 X11_FreeYUVOverlay
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51 };
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52
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53 struct private_yuvhwdata {
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54 int port;
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55 XShmSegmentInfo yuvshm;
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56 XvImage *image;
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57 };
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58
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59
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60 SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
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61 {
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62 SDL_Overlay *overlay;
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63 struct private_yuvhwdata *hwdata;
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64 int xv_port;
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65 int i, j;
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66 int adaptors;
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67 XvAdaptorInfo *ainfo;
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68 XShmSegmentInfo *yuvshm;
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69
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70 xv_port = -1;
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71 if ( (Success == XvQueryExtension(GFX_Display, &j, &j, &j, &j, &j)) &&
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72 (Success == XvQueryAdaptors(GFX_Display,
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73 RootWindow(GFX_Display, SDL_Screen),
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74 &adaptors, &ainfo)) ) {
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75 for ( i=0; (i<adaptors) && (xv_port == -1); ++i ) {
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76 if ( (ainfo[i].type & XvInputMask) &&
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77 (ainfo[i].type & XvImageMask) ) {
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78 int num_formats;
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79 XvImageFormatValues *formats;
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80 formats = XvListImageFormats(GFX_Display,
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81 ainfo[i].base_id, &num_formats);
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82 for ( j=0; j<num_formats; ++j ) {
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83 if ( (Uint32)formats[j].id == format ) {
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84 xv_port = ainfo[i].base_id;
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85 break;
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86 }
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87 }
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88 }
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89 }
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90 }
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91 if ( xv_port == -1 ) {
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92 SDL_SetError("No available video ports for requested format");
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93 return(NULL);
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94 }
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95
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96 /* Create the overlay structure */
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97 overlay = (SDL_Overlay *)malloc(sizeof *overlay);
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98 if ( overlay == NULL ) {
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99 SDL_OutOfMemory();
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100 return(NULL);
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101 }
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102 memset(overlay, 0, (sizeof *overlay));
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103
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104 /* Fill in the basic members */
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105 overlay->format = format;
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106 overlay->w = width;
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107 overlay->h = height;
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108
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109 /* Set up the YUV surface function structure */
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110 overlay->hwfuncs = &x11_yuvfuncs;
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111
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112 /* Create the pixel data and lookup tables */
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113 hwdata = (struct private_yuvhwdata *)malloc(sizeof *hwdata);
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114 overlay->hwdata = hwdata;
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115 if ( hwdata == NULL ) {
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116 SDL_OutOfMemory();
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117 SDL_FreeYUVOverlay(overlay);
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118 return(NULL);
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119 }
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120 yuvshm = &hwdata->yuvshm;
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121 memset(yuvshm, 0, sizeof(*yuvshm));
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122 hwdata->port = xv_port;
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123 hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
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124 0, width, height, yuvshm);
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125 if ( hwdata->image == NULL ) {
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126 SDL_OutOfMemory();
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127 SDL_FreeYUVOverlay(overlay);
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128 return(NULL);
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129 }
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130 yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
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131 IPC_CREAT | 0777);
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132 if ( yuvshm->shmid < 0 ) {
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133 SDL_SetError("Unable to get %d bytes shared memory",
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134 hwdata->image->data_size);
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135 SDL_FreeYUVOverlay(overlay);
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136 return(NULL);
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137 }
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138 yuvshm->shmaddr = (caddr_t) shmat(yuvshm->shmid, 0, 0);
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139 yuvshm->readOnly = False;
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140 hwdata->image->data = yuvshm->shmaddr;
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141
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142 XShmAttach(GFX_Display, yuvshm);
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143 XSync(GFX_Display, False);
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144 shmctl(yuvshm->shmid, IPC_RMID, 0);
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145
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146 /* We're all done.. */
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147 return(overlay);
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148 }
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149
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150 int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
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151 {
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152 overlay->pixels = overlay->hwdata->image->data;
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153 /* What should the pitch be set to? */
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154 return(0);
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155 }
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156
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157 void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
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158 {
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159 overlay->pixels = NULL;
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160 }
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161
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162 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
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163 {
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164 struct private_yuvhwdata *hwdata;
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165
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166 hwdata = overlay->hwdata;
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167 XvShmPutImage(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
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168 hwdata->image, 0, 0, overlay->w, overlay->h,
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169 dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
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170 XSync(GFX_Display, False);
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171 return(0);
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172 }
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173
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174 void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
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175 {
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176 struct private_yuvhwdata *hwdata;
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177
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178 hwdata = overlay->hwdata;
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179 if ( hwdata ) {
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180 if ( hwdata->yuvshm.shmaddr ) {
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181 XShmDetach(GFX_Display, &hwdata->yuvshm);
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182 shmdt(hwdata->yuvshm.shmaddr);
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183 }
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184 if ( hwdata->image ) {
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185 XFree(hwdata->image);
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186 }
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187 free(hwdata);
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188 }
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189 }
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190
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191 #endif /* XFREE86_XV */