Mercurial > sdl-ios-xcode
annotate docs/html/guidethebasics.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 >The Basics</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="SDL Guide" | |
14 HREF="guide.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="Credits" | |
17 HREF="guidecredits.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="Initializing SDL" | |
20 HREF="guidebasicsinit.html"></HEAD | |
21 ><BODY | |
22 CLASS="CHAPTER" | |
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="guidecredits.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="guidebasicsinit.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 ><DIV | |
72 CLASS="CHAPTER" | |
73 ><H1 | |
74 ><A | |
75 NAME="GUIDETHEBASICS" | |
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76 ></A |
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77 >Chapter 1. The Basics</H1 |
0 | 78 ><DIV |
79 CLASS="TOC" | |
80 ><DL | |
81 ><DT | |
82 ><B | |
83 >Table of Contents</B | |
84 ></DT | |
85 ><DT | |
86 ><A | |
87 HREF="guidethebasics.html#GUIDEINTRODUCTION" | |
88 >Introduction</A | |
89 ></DT | |
90 ><DT | |
91 ><A | |
92 HREF="guidebasicsinit.html" | |
93 >Initializing SDL</A | |
94 ></DT | |
95 ></DL | |
96 ></DIV | |
97 ><DIV | |
98 CLASS="SECT1" | |
99 ><H1 | |
100 CLASS="SECT1" | |
101 ><A | |
102 NAME="GUIDEINTRODUCTION" | |
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103 ></A |
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104 >Introduction</H1 |
0 | 105 ><P |
106 >The SDL Guide section is pretty incomplete. If you feel you have anything to add mail akawaka@skynet.ie or visit http://akawaka.csn.ul.ie/tne/.</P | |
107 ></DIV | |
108 ></DIV | |
109 ><DIV | |
110 CLASS="NAVFOOTER" | |
111 ><HR | |
112 ALIGN="LEFT" | |
113 WIDTH="100%"><TABLE | |
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114 SUMMARY="Footer navigation table" |
0 | 115 WIDTH="100%" |
116 BORDER="0" | |
117 CELLPADDING="0" | |
118 CELLSPACING="0" | |
119 ><TR | |
120 ><TD | |
121 WIDTH="33%" | |
122 ALIGN="left" | |
123 VALIGN="top" | |
124 ><A | |
125 HREF="guidecredits.html" | |
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126 ACCESSKEY="P" |
0 | 127 >Prev</A |
128 ></TD | |
129 ><TD | |
130 WIDTH="34%" | |
131 ALIGN="center" | |
132 VALIGN="top" | |
133 ><A | |
134 HREF="index.html" | |
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135 ACCESSKEY="H" |
0 | 136 >Home</A |
137 ></TD | |
138 ><TD | |
139 WIDTH="33%" | |
140 ALIGN="right" | |
141 VALIGN="top" | |
142 ><A | |
143 HREF="guidebasicsinit.html" | |
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144 ACCESSKEY="N" |
0 | 145 >Next</A |
146 ></TD | |
147 ></TR | |
148 ><TR | |
149 ><TD | |
150 WIDTH="33%" | |
151 ALIGN="left" | |
152 VALIGN="top" | |
153 >Credits</TD | |
154 ><TD | |
155 WIDTH="34%" | |
156 ALIGN="center" | |
157 VALIGN="top" | |
158 ><A | |
159 HREF="guide.html" | |
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160 ACCESSKEY="U" |
0 | 161 >Up</A |
162 ></TD | |
163 ><TD | |
164 WIDTH="33%" | |
165 ALIGN="right" | |
166 VALIGN="top" | |
167 >Initializing SDL</TD | |
168 ></TR | |
169 ></TABLE | |
170 ></DIV | |
171 ></BODY | |
172 ></HTML | |
173 > |