Mercurial > sdl-ios-xcode
annotate docs/html/sdldisplayyuvoverlay.html @ 615:7ec821f3cbd0
Date: Thu, 17 Apr 2003 23:27:34 -0400
From: Darrell Walisser
Subject: Yet another OS X cursor bug
The synopsis:
1. Call SDL_ShowCursor(0);
2. Call SDL_SetVideoMode();
3. Call SDL_GetEvent();
3. Call SDL_ShowCursor(1);
The result: Sometimes the cursor doesn't come back! Ack! Oddly enough,
it does come back when mousing over the dock or clicking in the menu
bar. But that's besides the point.
The reason why this is happening is a flaw in the handling of
activation/deactivation events. The short explanation is that the
HideCursor() and ShowCursor() calls must be balanced, but if the cursor
was initially hidden, HideCursor() was called again on the activate
event - so now the next ShowCursor() fails (as does the next, and the
next, for some reason).
So, here's the patch. All it does is keep track of the
HideCursor()/ShowCursor() calls so that they will always be balanced.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 20 Apr 2003 05:41:16 +0000 |
parents | e5bc29de3f0a |
children | 355632dca928 |
rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_DisplayYUVOverlay</TITLE | |
5 ><META | |
6 NAME="GENERATOR" | |
55
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
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_UnlockYUVOverlay" | |
17 HREF="sdlunlockyuvoverlay.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_FreeYUVOverlay" | |
20 HREF="sdlfreeyuvoverlay.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 | |
31 WIDTH="100%" | |
32 BORDER="0" | |
33 CELLPADDING="0" | |
34 CELLSPACING="0" | |
35 ><TR | |
36 ><TH | |
37 COLSPAN="3" | |
38 ALIGN="center" | |
39 >SDL Library Documentation</TH | |
40 ></TR | |
41 ><TR | |
42 ><TD | |
43 WIDTH="10%" | |
44 ALIGN="left" | |
45 VALIGN="bottom" | |
46 ><A | |
47 HREF="sdlunlockyuvoverlay.html" | |
48 >Prev</A | |
49 ></TD | |
50 ><TD | |
51 WIDTH="80%" | |
52 ALIGN="center" | |
53 VALIGN="bottom" | |
54 ></TD | |
55 ><TD | |
56 WIDTH="10%" | |
57 ALIGN="right" | |
58 VALIGN="bottom" | |
59 ><A | |
60 HREF="sdlfreeyuvoverlay.html" | |
61 >Next</A | |
62 ></TD | |
63 ></TR | |
64 ></TABLE | |
65 ><HR | |
66 ALIGN="LEFT" | |
67 WIDTH="100%"></DIV | |
68 ><H1 | |
69 ><A | |
70 NAME="SDLDISPLAYYUVOVERLAY" | |
71 >SDL_DisplayYUVOverlay</A | |
72 ></H1 | |
73 ><DIV | |
74 CLASS="REFNAMEDIV" | |
75 ><A | |
181
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76 NAME="AEN2524" |
0 | 77 ></A |
78 ><H2 | |
79 >Name</H2 | |
80 >SDL_DisplayYUVOverlay -- Blit the overlay to the display</DIV | |
81 ><DIV | |
82 CLASS="REFSYNOPSISDIV" | |
83 ><A | |
181
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84 NAME="AEN2527" |
0 | 85 ></A |
86 ><H2 | |
87 >Synopsis</H2 | |
88 ><DIV | |
89 CLASS="FUNCSYNOPSIS" | |
90 ><A | |
181
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91 NAME="AEN2528" |
0 | 92 ></A |
93 ><P | |
94 ></P | |
95 ><PRE | |
96 CLASS="FUNCSYNOPSISINFO" | |
97 >#include "SDL.h"</PRE | |
98 ><P | |
99 ><CODE | |
100 ><CODE | |
101 CLASS="FUNCDEF" | |
102 >int <B | |
103 CLASS="FSFUNC" | |
104 >SDL_DisplayYUVOverlay</B | |
105 ></CODE | |
106 >(SDL_Overlay *overlay, SDL_Rect *dstrect);</CODE | |
107 ></P | |
108 ><P | |
109 ></P | |
110 ></DIV | |
111 ></DIV | |
112 ><DIV | |
113 CLASS="REFSECT1" | |
114 ><A | |
181
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115 NAME="AEN2534" |
0 | 116 ></A |
117 ><H2 | |
118 >Description</H2 | |
119 ><P | |
120 >Blit the <TT | |
121 CLASS="PARAMETER" | |
122 ><I | |
123 >overlay</I | |
124 ></TT | |
125 > to the surface specified when it was <A | |
126 HREF="sdlcreateyuvoverlay.html" | |
127 >created</A | |
128 >. The <A | |
129 HREF="sdlrect.html" | |
130 ><SPAN | |
131 CLASS="STRUCTNAME" | |
132 >SDL_Rect</SPAN | |
133 ></A | |
134 > structure, <TT | |
135 CLASS="PARAMETER" | |
136 ><I | |
137 >dstrect</I | |
138 ></TT | |
139 >, specifies the position and size of the destination. If the <TT | |
140 CLASS="PARAMETER" | |
141 ><I | |
142 >dstrect</I | |
143 ></TT | |
144 > is a larger or smaller than the overlay then the overlay will be scaled, this is optimized for 2x scaling.</P | |
145 ></DIV | |
146 ><DIV | |
147 CLASS="REFSECT1" | |
148 ><A | |
181
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149 NAME="AEN2543" |
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150 ></A |
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151 ><H2 |
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152 >Return Values</H2 |
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153 ><P |
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154 >Returns 0 on success</P |
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155 ></DIV |
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156 ><DIV |
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157 CLASS="REFSECT1" |
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158 ><A |
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159 NAME="AEN2546" |
0 | 160 ></A |
161 ><H2 | |
162 >See Also</H2 | |
163 ><P | |
164 ><A | |
165 HREF="sdloverlay.html" | |
166 ><SPAN | |
167 CLASS="STRUCTNAME" | |
168 >SDL_Overlay</SPAN | |
169 ></A | |
170 >, | |
171 <A | |
172 HREF="sdlcreateyuvoverlay.html" | |
173 ><TT | |
174 CLASS="FUNCTION" | |
175 >SDL_CreateYUVOverlay</TT | |
176 ></A | |
177 ></P | |
178 ></DIV | |
179 ><DIV | |
180 CLASS="NAVFOOTER" | |
181 ><HR | |
182 ALIGN="LEFT" | |
183 WIDTH="100%"><TABLE | |
184 WIDTH="100%" | |
185 BORDER="0" | |
186 CELLPADDING="0" | |
187 CELLSPACING="0" | |
188 ><TR | |
189 ><TD | |
190 WIDTH="33%" | |
191 ALIGN="left" | |
192 VALIGN="top" | |
193 ><A | |
194 HREF="sdlunlockyuvoverlay.html" | |
195 >Prev</A | |
196 ></TD | |
197 ><TD | |
198 WIDTH="34%" | |
199 ALIGN="center" | |
200 VALIGN="top" | |
201 ><A | |
202 HREF="index.html" | |
203 >Home</A | |
204 ></TD | |
205 ><TD | |
206 WIDTH="33%" | |
207 ALIGN="right" | |
208 VALIGN="top" | |
209 ><A | |
210 HREF="sdlfreeyuvoverlay.html" | |
211 >Next</A | |
212 ></TD | |
213 ></TR | |
214 ><TR | |
215 ><TD | |
216 WIDTH="33%" | |
217 ALIGN="left" | |
218 VALIGN="top" | |
219 >SDL_UnlockYUVOverlay</TD | |
220 ><TD | |
221 WIDTH="34%" | |
222 ALIGN="center" | |
223 VALIGN="top" | |
224 ><A | |
225 HREF="video.html" | |
226 >Up</A | |
227 ></TD | |
228 ><TD | |
229 WIDTH="33%" | |
230 ALIGN="right" | |
231 VALIGN="top" | |
232 >SDL_FreeYUVOverlay</TD | |
233 ></TR | |
234 ></TABLE | |
235 ></DIV | |
236 ></BODY | |
237 ></HTML | |
238 > |