Mercurial > sdl-ios-xcode

comparison src/video/cybergfx/SDL_cgxyuv.c @ 21:75a95f82bc1f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Updated the Amiga OS port of SDL (thanks Gabriele)
author Sam Lantinga <slouken@lokigames.com>
date Thu, 10 May 2001 20:13:29 +0000
parents
children e8157fcb3114
comparison
equal deleted inserted replaced
20:3dc008dc229d 21:75a95f82bc1f
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* This is the XFree86 Xv extension implementation of YUV video overlays */
29
30 #ifdef XFREE86_XV
31
32 #include <stdlib.h>
33 #include <string.h>
34 #include <X11/Xlib.h>
35 #include <sys/ipc.h>
36 #include <sys/shm.h>
37 #include <X11/extensions/XShm.h>
38 #include <X11/extensions/Xvlib.h>
39
40 #include "SDL_error.h"
41 #include "SDL_video.h"
42 #include "SDL_x11yuv_c.h"
43 #include "SDL_yuvfuncs.h"
44
45 /* The functions used to manipulate software video overlays */
46 static struct private_yuvhwfuncs x11_yuvfuncs = {
47 X11_LockYUVOverlay,
48 X11_UnlockYUVOverlay,
49 X11_DisplayYUVOverlay,
50 X11_FreeYUVOverlay
51 };
52
53 struct private_yuvhwdata {
54 int port;
55 XShmSegmentInfo yuvshm;
56 XvImage *image;
57 };
58
59
60 SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
61 {
62 SDL_Overlay *overlay;
63 struct private_yuvhwdata *hwdata;
64 int xv_port;
65 int i, j;
66 int adaptors;
67 XvAdaptorInfo *ainfo;
68 XShmSegmentInfo *yuvshm;
69
70 xv_port = -1;
71 if ( (Success == XvQueryExtension(GFX_Display, &j, &j, &j, &j, &j)) &&
72 (Success == XvQueryAdaptors(GFX_Display,
73 RootWindow(GFX_Display, SDL_Screen),
74 &adaptors, &ainfo)) ) {
75 for ( i=0; (i<adaptors) && (xv_port == -1); ++i ) {
76 if ( (ainfo[i].type & XvInputMask) &&
77 (ainfo[i].type & XvImageMask) ) {
78 int num_formats;
79 XvImageFormatValues *formats;
80 formats = XvListImageFormats(GFX_Display,
81 ainfo[i].base_id, &num_formats);
82 for ( j=0; j<num_formats; ++j ) {
83 if ( (Uint32)formats[j].id == format ) {
84 xv_port = ainfo[i].base_id;
85 break;
86 }
87 }
88 }
89 }
90 }
91 if ( xv_port == -1 ) {
92 SDL_SetError("No available video ports for requested format");
93 return(NULL);
94 }
95
96 /* Create the overlay structure */
97 overlay = (SDL_Overlay *)malloc(sizeof *overlay);
98 if ( overlay == NULL ) {
99 SDL_OutOfMemory();
100 return(NULL);
101 }
102 memset(overlay, 0, (sizeof *overlay));
103
104 /* Fill in the basic members */
105 overlay->format = format;
106 overlay->w = width;
107 overlay->h = height;
108
109 /* Set up the YUV surface function structure */
110 overlay->hwfuncs = &x11_yuvfuncs;
111
112 /* Create the pixel data and lookup tables */
113 hwdata = (struct private_yuvhwdata *)malloc(sizeof *hwdata);
114 overlay->hwdata = hwdata;
115 if ( hwdata == NULL ) {
116 SDL_OutOfMemory();
117 SDL_FreeYUVOverlay(overlay);
118 return(NULL);
119 }
120 yuvshm = &hwdata->yuvshm;
121 memset(yuvshm, 0, sizeof(*yuvshm));
122 hwdata->port = xv_port;
123 hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
124 0, width, height, yuvshm);
125 if ( hwdata->image == NULL ) {
126 SDL_OutOfMemory();
127 SDL_FreeYUVOverlay(overlay);
128 return(NULL);
129 }
130 yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
131 IPC_CREAT | 0777);
132 if ( yuvshm->shmid < 0 ) {
133 SDL_SetError("Unable to get %d bytes shared memory",
134 hwdata->image->data_size);
135 SDL_FreeYUVOverlay(overlay);
136 return(NULL);
137 }
138 yuvshm->shmaddr = (caddr_t) shmat(yuvshm->shmid, 0, 0);
139 yuvshm->readOnly = False;
140 hwdata->image->data = yuvshm->shmaddr;
141
142 XShmAttach(GFX_Display, yuvshm);
143 XSync(GFX_Display, False);
144 shmctl(yuvshm->shmid, IPC_RMID, 0);
145
146 /* We're all done.. */
147 return(overlay);
148 }
149
150 int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
151 {
152 overlay->pixels = overlay->hwdata->image->data;
153 /* What should the pitch be set to? */
154 return(0);
155 }
156
157 void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
158 {
159 overlay->pixels = NULL;
160 }
161
162 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
163 {
164 struct private_yuvhwdata *hwdata;
165
166 hwdata = overlay->hwdata;
167 XvShmPutImage(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
168 hwdata->image, 0, 0, overlay->w, overlay->h,
169 dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
170 XSync(GFX_Display, False);
171 return(0);
172 }
173
174 void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
175 {
176 struct private_yuvhwdata *hwdata;
177
178 hwdata = overlay->hwdata;
179 if ( hwdata ) {
180 if ( hwdata->yuvshm.shmaddr ) {
181 XShmDetach(GFX_Display, &hwdata->yuvshm);
182 shmdt(hwdata->yuvshm.shmaddr);
183 }
184 if ( hwdata->image ) {
185 XFree(hwdata->image);
186 }
187 free(hwdata);
188 }
189 }
190
191 #endif /* XFREE86_XV */