Mercurial > sdl-ios-xcode
annotate docs/html/sdlsavebmp.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_SaveBMP</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_LoadBMP" | |
17 HREF="sdlloadbmp.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_SetColorKey" | |
20 HREF="sdlsetcolorkey.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="sdlloadbmp.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="sdlsetcolorkey.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="SDLSAVEBMP" | |
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74 ></A |
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75 >SDL_SaveBMP</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN2015" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_SaveBMP -- Save an SDL_Surface as a Windows BMP file.</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN2018" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN2019" |
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 >int <B | |
106 CLASS="FSFUNC" | |
107 >SDL_SaveBMP</B | |
108 ></CODE | |
109 >(SDL_Surface *surface, const char *file);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN2025" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Saves the <SPAN | |
124 CLASS="STRUCTNAME" | |
125 >SDL_Surface</SPAN | |
126 > <TT | |
127 CLASS="PARAMETER" | |
128 ><I | |
129 >surface</I | |
130 ></TT | |
131 > as a Windows BMP file named <TT | |
132 CLASS="PARAMETER" | |
133 ><I | |
134 >file</I | |
135 ></TT | |
136 >.</P | |
137 ></DIV | |
138 ><DIV | |
139 CLASS="REFSECT1" | |
140 ><A | |
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141 NAME="AEN2031" |
0 | 142 ></A |
143 ><H2 | |
144 >Return Value</H2 | |
145 ><P | |
146 >Returns <SPAN | |
147 CLASS="RETURNVALUE" | |
148 >0</SPAN | |
149 > if successful or | |
150 <SPAN | |
151 CLASS="RETURNVALUE" | |
152 >-1</SPAN | |
153 > | |
154 if there was an error.</P | |
155 ></DIV | |
156 ><DIV | |
157 CLASS="REFSECT1" | |
158 ><A | |
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159 NAME="AEN2036" |
0 | 160 ></A |
161 ><H2 | |
162 >See Also</H2 | |
163 ><P | |
164 ><A | |
165 HREF="sdlloadbmp.html" | |
166 ><TT | |
167 CLASS="FUNCTION" | |
168 >SDL_LoadBMP</TT | |
169 ></A | |
170 ></P | |
171 ></DIV | |
172 ><DIV | |
173 CLASS="NAVFOOTER" | |
174 ><HR | |
175 ALIGN="LEFT" | |
176 WIDTH="100%"><TABLE | |
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177 SUMMARY="Footer navigation table" |
0 | 178 WIDTH="100%" |
179 BORDER="0" | |
180 CELLPADDING="0" | |
181 CELLSPACING="0" | |
182 ><TR | |
183 ><TD | |
184 WIDTH="33%" | |
185 ALIGN="left" | |
186 VALIGN="top" | |
187 ><A | |
188 HREF="sdlloadbmp.html" | |
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189 ACCESSKEY="P" |
0 | 190 >Prev</A |
191 ></TD | |
192 ><TD | |
193 WIDTH="34%" | |
194 ALIGN="center" | |
195 VALIGN="top" | |
196 ><A | |
197 HREF="index.html" | |
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198 ACCESSKEY="H" |
0 | 199 >Home</A |
200 ></TD | |
201 ><TD | |
202 WIDTH="33%" | |
203 ALIGN="right" | |
204 VALIGN="top" | |
205 ><A | |
206 HREF="sdlsetcolorkey.html" | |
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207 ACCESSKEY="N" |
0 | 208 >Next</A |
209 ></TD | |
210 ></TR | |
211 ><TR | |
212 ><TD | |
213 WIDTH="33%" | |
214 ALIGN="left" | |
215 VALIGN="top" | |
216 >SDL_LoadBMP</TD | |
217 ><TD | |
218 WIDTH="34%" | |
219 ALIGN="center" | |
220 VALIGN="top" | |
221 ><A | |
222 HREF="video.html" | |
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223 ACCESSKEY="U" |
0 | 224 >Up</A |
225 ></TD | |
226 ><TD | |
227 WIDTH="33%" | |
228 ALIGN="right" | |
229 VALIGN="top" | |
230 >SDL_SetColorKey</TD | |
231 ></TR | |
232 ></TABLE | |
233 ></DIV | |
234 ></BODY | |
235 ></HTML | |
236 > |