Mercurial > sdl-ios-xcode

annotate src/video/cybergfx/SDL_cgxyuv.c @ 1319:66f6c64c2c69

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Logic bug in X11 Unicode input shutdown...was checking for == NULL when it should be != NULL.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 01 Feb 2006 19:59:02 +0000
parents c9b51268668f
children 3692456e7b0f
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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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 /* This is the XFree86 Xv extension implementation of YUV video overlays */
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24
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25 #ifdef XFREE86_XV
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26
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27 #include <stdlib.h>
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28 #include <string.h>
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29 #include <X11/Xlib.h>
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30 #include <sys/ipc.h>
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31 #include <sys/shm.h>
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32 #include <X11/extensions/XShm.h>
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33 #include <X11/extensions/Xvlib.h>
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34
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35 #include "SDL_error.h"
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36 #include "SDL_video.h"
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37 #include "SDL_x11yuv_c.h"
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38 #include "SDL_yuvfuncs.h"
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39
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40 /* The functions used to manipulate software video overlays */
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41 static struct private_yuvhwfuncs x11_yuvfuncs = {
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42 X11_LockYUVOverlay,
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43 X11_UnlockYUVOverlay,
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44 X11_DisplayYUVOverlay,
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45 X11_FreeYUVOverlay
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46 };
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47
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48 struct private_yuvhwdata {
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49 int port;
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50 XShmSegmentInfo yuvshm;
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51 XvImage *image;
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52 };
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53
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54
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55 SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
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56 {
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57 SDL_Overlay *overlay;
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58 struct private_yuvhwdata *hwdata;
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59 int xv_port;
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60 int i, j;
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61 int adaptors;
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62 XvAdaptorInfo *ainfo;
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63 XShmSegmentInfo *yuvshm;
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64
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65 xv_port = -1;
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66 if ( (Success == XvQueryExtension(GFX_Display, &j, &j, &j, &j, &j)) &&
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67 (Success == XvQueryAdaptors(GFX_Display,
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68 RootWindow(GFX_Display, SDL_Screen),
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69 &adaptors, &ainfo)) ) {
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70 for ( i=0; (i<adaptors) && (xv_port == -1); ++i ) {
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71 if ( (ainfo[i].type & XvInputMask) &&
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72 (ainfo[i].type & XvImageMask) ) {
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73 int num_formats;
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74 XvImageFormatValues *formats;
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75 formats = XvListImageFormats(GFX_Display,
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76 ainfo[i].base_id, &num_formats);
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77 for ( j=0; j<num_formats; ++j ) {
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78 if ( (Uint32)formats[j].id == format ) {
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79 xv_port = ainfo[i].base_id;
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80 break;
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81 }
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82 }
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83 }
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84 }
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85 }
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86 if ( xv_port == -1 ) {
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87 SDL_SetError("No available video ports for requested format");
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88 return(NULL);
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89 }
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90
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91 /* Create the overlay structure */
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92 overlay = (SDL_Overlay *)malloc(sizeof *overlay);
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93 if ( overlay == NULL ) {
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94 SDL_OutOfMemory();
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95 return(NULL);
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96 }
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97 memset(overlay, 0, (sizeof *overlay));
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98
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99 /* Fill in the basic members */
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100 overlay->format = format;
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101 overlay->w = width;
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102 overlay->h = height;
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103
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104 /* Set up the YUV surface function structure */
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105 overlay->hwfuncs = &x11_yuvfuncs;
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106
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107 /* Create the pixel data and lookup tables */
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108 hwdata = (struct private_yuvhwdata *)malloc(sizeof *hwdata);
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109 overlay->hwdata = hwdata;
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110 if ( hwdata == NULL ) {
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111 SDL_OutOfMemory();
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112 SDL_FreeYUVOverlay(overlay);
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113 return(NULL);
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114 }
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115 yuvshm = &hwdata->yuvshm;
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116 memset(yuvshm, 0, sizeof(*yuvshm));
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117 hwdata->port = xv_port;
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118 hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
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119 0, width, height, yuvshm);
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120 if ( hwdata->image == NULL ) {
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121 SDL_OutOfMemory();
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122 SDL_FreeYUVOverlay(overlay);
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123 return(NULL);
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124 }
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125 yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
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126 IPC_CREAT | 0777);
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127 if ( yuvshm->shmid < 0 ) {
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128 SDL_SetError("Unable to get %d bytes shared memory",
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129 hwdata->image->data_size);
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130 SDL_FreeYUVOverlay(overlay);
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131 return(NULL);
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132 }
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133 yuvshm->shmaddr = (caddr_t) shmat(yuvshm->shmid, 0, 0);
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134 yuvshm->readOnly = False;
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135 hwdata->image->data = yuvshm->shmaddr;
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136
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137 XShmAttach(GFX_Display, yuvshm);
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138 XSync(GFX_Display, False);
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139 shmctl(yuvshm->shmid, IPC_RMID, 0);
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140
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141 /* We're all done.. */
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142 return(overlay);
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143 }
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144
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145 int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
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146 {
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147 overlay->pixels = overlay->hwdata->image->data;
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148 /* What should the pitch be set to? */
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149 return(0);
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150 }
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151
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152 void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
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153 {
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154 overlay->pixels = NULL;
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155 }
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156
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157 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
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158 {
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159 struct private_yuvhwdata *hwdata;
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160
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161 hwdata = overlay->hwdata;
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162 XvShmPutImage(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
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163 hwdata->image, 0, 0, overlay->w, overlay->h,
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164 dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
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165 XSync(GFX_Display, False);
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166 return(0);
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167 }
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168
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169 void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
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170 {
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171 struct private_yuvhwdata *hwdata;
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172
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173 hwdata = overlay->hwdata;
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174 if ( hwdata ) {
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175 if ( hwdata->yuvshm.shmaddr ) {
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176 XShmDetach(GFX_Display, &hwdata->yuvshm);
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177 shmdt(hwdata->yuvshm.shmaddr);
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178 }
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179 if ( hwdata->image ) {
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180 XFree(hwdata->image);
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181 }
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182 free(hwdata);
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183 }
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184 }
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185
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186 #endif /* XFREE86_XV */