Mercurial > sdl-ios-xcode
annotate docs/html/sdlshowcursor.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_ShowCursor</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_GetCursor" | |
17 HREF="sdlgetcursor.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_GL_LoadLibrary" | |
20 HREF="sdlglloadlibrary.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="sdlgetcursor.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="sdlglloadlibrary.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="SDLSHOWCURSOR" | |
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74 ></A |
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75 >SDL_ShowCursor</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN2615" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_ShowCursor -- Toggle whether or not the cursor is shown on the screen.</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN2618" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN2619" |
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_ShowCursor</B | |
108 ></CODE | |
109 >(int toggle);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN2625" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Toggle whether or not the cursor is shown on the screen. Passing <TT | |
124 CLASS="LITERAL" | |
125 >SDL_ENABLE</TT | |
126 > displays the cursor and passing <TT | |
127 CLASS="LITERAL" | |
128 >SDL_DISABLE</TT | |
129 > hides it. The current state of the mouse cursor can be queried by passing <TT | |
130 CLASS="LITERAL" | |
131 >SDL_QUERY</TT | |
132 >, either <TT | |
133 CLASS="LITERAL" | |
134 >SDL_DISABLE</TT | |
135 > or <TT | |
136 CLASS="LITERAL" | |
137 >SDL_ENABLE</TT | |
138 > will be returned.</P | |
139 ><P | |
140 >The cursor starts off displayed, but can be turned off.</P | |
141 ></DIV | |
142 ><DIV | |
143 CLASS="REFSECT1" | |
144 ><A | |
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145 NAME="AEN2634" |
0 | 146 ></A |
147 ><H2 | |
148 >Return Value</H2 | |
149 ><P | |
150 >Returns the current state of the cursor.</P | |
151 ></DIV | |
152 ><DIV | |
153 CLASS="REFSECT1" | |
154 ><A | |
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155 NAME="AEN2637" |
0 | 156 ></A |
157 ><H2 | |
158 >See Also</H2 | |
159 ><P | |
160 ><A | |
161 HREF="sdlcreatecursor.html" | |
162 ><TT | |
163 CLASS="FUNCTION" | |
164 >SDL_CreateCursor</TT | |
165 ></A | |
166 >, | |
167 <A | |
168 HREF="sdlsetcursor.html" | |
169 ><TT | |
170 CLASS="FUNCTION" | |
171 >SDL_SetCursor</TT | |
172 ></A | |
173 ></P | |
174 ></DIV | |
175 ><DIV | |
176 CLASS="NAVFOOTER" | |
177 ><HR | |
178 ALIGN="LEFT" | |
179 WIDTH="100%"><TABLE | |
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180 SUMMARY="Footer navigation table" |
0 | 181 WIDTH="100%" |
182 BORDER="0" | |
183 CELLPADDING="0" | |
184 CELLSPACING="0" | |
185 ><TR | |
186 ><TD | |
187 WIDTH="33%" | |
188 ALIGN="left" | |
189 VALIGN="top" | |
190 ><A | |
191 HREF="sdlgetcursor.html" | |
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192 ACCESSKEY="P" |
0 | 193 >Prev</A |
194 ></TD | |
195 ><TD | |
196 WIDTH="34%" | |
197 ALIGN="center" | |
198 VALIGN="top" | |
199 ><A | |
200 HREF="index.html" | |
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201 ACCESSKEY="H" |
0 | 202 >Home</A |
203 ></TD | |
204 ><TD | |
205 WIDTH="33%" | |
206 ALIGN="right" | |
207 VALIGN="top" | |
208 ><A | |
209 HREF="sdlglloadlibrary.html" | |
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210 ACCESSKEY="N" |
0 | 211 >Next</A |
212 ></TD | |
213 ></TR | |
214 ><TR | |
215 ><TD | |
216 WIDTH="33%" | |
217 ALIGN="left" | |
218 VALIGN="top" | |
219 >SDL_GetCursor</TD | |
220 ><TD | |
221 WIDTH="34%" | |
222 ALIGN="center" | |
223 VALIGN="top" | |
224 ><A | |
225 HREF="video.html" | |
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226 ACCESSKEY="U" |
0 | 227 >Up</A |
228 ></TD | |
229 ><TD | |
230 WIDTH="33%" | |
231 ALIGN="right" | |
232 VALIGN="top" | |
233 >SDL_GL_LoadLibrary</TD | |
234 ></TR | |
235 ></TABLE | |
236 ></DIV | |
237 ></BODY | |
238 ></HTML | |
239 > |