Mercurial > sdl-ios-xcode
annotate docs/html/sdlcreateyuvoverlay.html @ 3335:b8d313de8a65
Adam Strzelecki to SDL
Since current DirectFB implementation is incomplete for YUV surfaces (actually causes segmentation faults when trying Lock and use YUV planar textures) I decided to fix it a bit.
Here's a patch that should make DirectFB properly support YUV both packed and planar (3 planes).
(1) Removed SDL_BYTESPERPIXEL at all in favor of DFB_BYTES_PER_PIXEL(SDLToDFBPixelFormat(fmt)) which does return always proper BPP for YUVs too, coz SDL_BYTESPERPIXEL returns incorrect values for FOURCCs
(2) Fixed data->pixels allocation for planar YUVs in CreateTexture, it should allocate 150% more space
(3) Copy other planes for planar YUVs in UpdateTexture
(4) Moved checking if format is supported at all with DirectFB on CreateTexture at the beginning of the code
Waiting for comments,
--
Adam Strzelecki | nanoant.com
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 04 Oct 2009 04:03:37 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_CreateYUVOverlay</TITLE | |
5 ><META | |
6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
0 | 8 "><LINK |
9 REL="HOME" | |
10 TITLE="SDL Library Documentation" | |
11 HREF="index.html"><LINK | |
12 REL="UP" | |
13 TITLE="Video" | |
14 HREF="video.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_GL_SwapBuffers" | |
17 HREF="sdlglswapbuffers.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_LockYUVOverlay" | |
20 HREF="sdllockyuvoverlay.html"></HEAD | |
21 ><BODY | |
22 CLASS="REFENTRY" | |
23 BGCOLOR="#FFF8DC" | |
24 TEXT="#000000" | |
25 LINK="#0000ee" | |
26 VLINK="#551a8b" | |
27 ALINK="#ff0000" | |
28 ><DIV | |
29 CLASS="NAVHEADER" | |
30 ><TABLE | |
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31 SUMMARY="Header navigation table" |
0 | 32 WIDTH="100%" |
33 BORDER="0" | |
34 CELLPADDING="0" | |
35 CELLSPACING="0" | |
36 ><TR | |
37 ><TH | |
38 COLSPAN="3" | |
39 ALIGN="center" | |
40 >SDL Library Documentation</TH | |
41 ></TR | |
42 ><TR | |
43 ><TD | |
44 WIDTH="10%" | |
45 ALIGN="left" | |
46 VALIGN="bottom" | |
47 ><A | |
48 HREF="sdlglswapbuffers.html" | |
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49 ACCESSKEY="P" |
0 | 50 >Prev</A |
51 ></TD | |
52 ><TD | |
53 WIDTH="80%" | |
54 ALIGN="center" | |
55 VALIGN="bottom" | |
56 ></TD | |
57 ><TD | |
58 WIDTH="10%" | |
59 ALIGN="right" | |
60 VALIGN="bottom" | |
61 ><A | |
62 HREF="sdllockyuvoverlay.html" | |
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63 ACCESSKEY="N" |
0 | 64 >Next</A |
65 ></TD | |
66 ></TR | |
67 ></TABLE | |
68 ><HR | |
69 ALIGN="LEFT" | |
70 WIDTH="100%"></DIV | |
71 ><H1 | |
72 ><A | |
73 NAME="SDLCREATEYUVOVERLAY" | |
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74 ></A |
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75 >SDL_CreateYUVOverlay</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN2808" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_CreateYUVOverlay -- Create a YUV video overlay</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN2811" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN2812" |
0 | 95 ></A |
96 ><P | |
97 ></P | |
98 ><PRE | |
99 CLASS="FUNCSYNOPSISINFO" | |
100 >#include "SDL.h"</PRE | |
101 ><P | |
102 ><CODE | |
103 ><CODE | |
104 CLASS="FUNCDEF" | |
105 >SDL_Overlay *<B | |
106 CLASS="FSFUNC" | |
107 >SDL_CreateYUVOverlay</B | |
108 ></CODE | |
109 >(int width, int height, Uint32 format, SDL_Surface *display);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN2818" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 ><TT | |
124 CLASS="FUNCTION" | |
125 >SDL_CreateYUVOverlay</TT | |
126 > creates a YUV overlay of the specified <TT | |
127 CLASS="PARAMETER" | |
128 ><I | |
129 >width</I | |
130 ></TT | |
131 >, <TT | |
132 CLASS="PARAMETER" | |
133 ><I | |
134 >height</I | |
135 ></TT | |
136 > and <TT | |
137 CLASS="PARAMETER" | |
138 ><I | |
139 >format</I | |
140 ></TT | |
141 > (see <A | |
142 HREF="sdloverlay.html" | |
143 ><SPAN | |
144 CLASS="STRUCTNAME" | |
145 >SDL_Overlay</SPAN | |
146 ></A | |
147 > for a list of available formats), for the provided <TT | |
148 CLASS="PARAMETER" | |
149 ><I | |
150 >display</I | |
151 ></TT | |
152 >. A <A | |
153 HREF="sdloverlay.html" | |
154 ><SPAN | |
155 CLASS="STRUCTNAME" | |
156 >SDL_Overlay</SPAN | |
157 ></A | |
158 > structure is returned.</P | |
159 ><P | |
160 >The term 'overlay' is a misnomer since, unless the overlay is created in hardware, the contents for the display surface underneath the area where the overlay is shown will be overwritten when the overlay is displayed.</P | |
161 ></DIV | |
162 ><DIV | |
163 CLASS="REFSECT1" | |
164 ><A | |
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165 NAME="AEN2831" |
0 | 166 ></A |
167 ><H2 | |
168 >See Also</H2 | |
169 ><P | |
170 ><A | |
171 HREF="sdloverlay.html" | |
172 ><SPAN | |
173 CLASS="STRUCTNAME" | |
174 >SDL_Overlay</SPAN | |
175 ></A | |
176 >, | |
177 <A | |
178 HREF="sdldisplayyuvoverlay.html" | |
179 ><TT | |
180 CLASS="FUNCTION" | |
181 >SDL_DisplayYUVOverlay</TT | |
182 ></A | |
183 >, | |
184 <A | |
185 HREF="sdlfreeyuvoverlay.html" | |
186 ><TT | |
187 CLASS="FUNCTION" | |
188 >SDL_FreeYUVOverlay</TT | |
189 ></A | |
190 ></P | |
191 ></DIV | |
192 ><DIV | |
193 CLASS="NAVFOOTER" | |
194 ><HR | |
195 ALIGN="LEFT" | |
196 WIDTH="100%"><TABLE | |
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197 SUMMARY="Footer navigation table" |
0 | 198 WIDTH="100%" |
199 BORDER="0" | |
200 CELLPADDING="0" | |
201 CELLSPACING="0" | |
202 ><TR | |
203 ><TD | |
204 WIDTH="33%" | |
205 ALIGN="left" | |
206 VALIGN="top" | |
207 ><A | |
208 HREF="sdlglswapbuffers.html" | |
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209 ACCESSKEY="P" |
0 | 210 >Prev</A |
211 ></TD | |
212 ><TD | |
213 WIDTH="34%" | |
214 ALIGN="center" | |
215 VALIGN="top" | |
216 ><A | |
217 HREF="index.html" | |
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218 ACCESSKEY="H" |
0 | 219 >Home</A |
220 ></TD | |
221 ><TD | |
222 WIDTH="33%" | |
223 ALIGN="right" | |
224 VALIGN="top" | |
225 ><A | |
226 HREF="sdllockyuvoverlay.html" | |
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227 ACCESSKEY="N" |
0 | 228 >Next</A |
229 ></TD | |
230 ></TR | |
231 ><TR | |
232 ><TD | |
233 WIDTH="33%" | |
234 ALIGN="left" | |
235 VALIGN="top" | |
236 >SDL_GL_SwapBuffers</TD | |
237 ><TD | |
238 WIDTH="34%" | |
239 ALIGN="center" | |
240 VALIGN="top" | |
241 ><A | |
242 HREF="video.html" | |
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243 ACCESSKEY="U" |
0 | 244 >Up</A |
245 ></TD | |
246 ><TD | |
247 WIDTH="33%" | |
248 ALIGN="right" | |
249 VALIGN="top" | |
250 >SDL_LockYUVOverlay</TD | |
251 ></TR | |
252 ></TABLE | |
253 ></DIV | |
254 ></BODY | |
255 ></HTML | |
256 > |