Mercurial > sdl-ios-xcode
annotate docs/html/time.html @ 821:30168104389f
Date: Sat, 14 Feb 2004 14:52:40 +0200
From: "Mike Gorchak"
Subject: Batch of the QNX6 fixes for the SDL
1. Updated readme.QNX
2. Fixed crashes during intensive window updating under fast machines (got over 200 rectangles for update).
3. Fixed double-buffered fullscreen modes, now it works as needed.
4. Fixed Photon detection algorithm.
5. Fixed HWSURFACE update function.
6. Added SDL_PHOTON_FULLSCREEN_REFRESH environment variable support for control refresh rates under Photon.
7. Added 640x400 fullscreen mode emulation via 640x480 (if videodriver not supports original 640x400 mode of course) shifted by 40 vertical pixels from begin, to center it. It's needed for some old DOS games which ran in doubled 320x200 mode.
8. Added available video ram amount support.
8. Added hardware surface allocation/deallocation support if current videomode and videodriver supports it.
9. Added hardware filling support.
10. Added hardware blits support (simple and colorkeyed).
And I've added to testvidinfo test color-keyed blits benchmark (maybe need to add alpha blits benchmark too ?). Currently Photon not supporting any alpha hardware blittings (all drivers lack of alpha blitting code support, only software alpha blitting exist in photon, which is hundreds times slowest than the SDL's one). So I've not added the alpha support. I suppose new QNX 6.3 will have the hardware alpha support, so when it will be done, I'll add alpha support.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 14 Feb 2004 20:22:21 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >Time</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 Reference" | |
14 HREF="reference.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_CondWaitTimeout" | |
17 HREF="sdlcondwaittimeout.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_GetTicks" | |
20 HREF="sdlgetticks.html"><META | |
21 NAME="KEYWORD" | |
22 CONTENT="time"><META | |
23 NAME="KEYWORD" | |
24 CONTENT="function"></HEAD | |
25 ><BODY | |
26 CLASS="CHAPTER" | |
27 BGCOLOR="#FFF8DC" | |
28 TEXT="#000000" | |
29 LINK="#0000ee" | |
30 VLINK="#551a8b" | |
31 ALINK="#ff0000" | |
32 ><DIV | |
33 CLASS="NAVHEADER" | |
34 ><TABLE | |
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35 SUMMARY="Header navigation table" |
0 | 36 WIDTH="100%" |
37 BORDER="0" | |
38 CELLPADDING="0" | |
39 CELLSPACING="0" | |
40 ><TR | |
41 ><TH | |
42 COLSPAN="3" | |
43 ALIGN="center" | |
44 >SDL Library Documentation</TH | |
45 ></TR | |
46 ><TR | |
47 ><TD | |
48 WIDTH="10%" | |
49 ALIGN="left" | |
50 VALIGN="bottom" | |
51 ><A | |
52 HREF="sdlcondwaittimeout.html" | |
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53 ACCESSKEY="P" |
0 | 54 >Prev</A |
55 ></TD | |
56 ><TD | |
57 WIDTH="80%" | |
58 ALIGN="center" | |
59 VALIGN="bottom" | |
60 ></TD | |
61 ><TD | |
62 WIDTH="10%" | |
63 ALIGN="right" | |
64 VALIGN="bottom" | |
65 ><A | |
66 HREF="sdlgetticks.html" | |
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67 ACCESSKEY="N" |
0 | 68 >Next</A |
69 ></TD | |
70 ></TR | |
71 ></TABLE | |
72 ><HR | |
73 ALIGN="LEFT" | |
74 WIDTH="100%"></DIV | |
75 ><DIV | |
76 CLASS="CHAPTER" | |
77 ><H1 | |
78 ><A | |
79 NAME="TIME" | |
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80 ></A |
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81 >Chapter 13. Time</H1 |
0 | 82 ><DIV |
83 CLASS="TOC" | |
84 ><DL | |
85 ><DT | |
86 ><B | |
87 >Table of Contents</B | |
88 ></DT | |
89 ><DT | |
90 ><A | |
91 HREF="sdlgetticks.html" | |
92 >SDL_GetTicks</A | |
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93 > -- Get the number of milliseconds since the SDL library initialization.</DT |
0 | 94 ><DT |
95 ><A | |
96 HREF="sdldelay.html" | |
97 >SDL_Delay</A | |
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98 > -- Wait a specified number of milliseconds before returning.</DT |
0 | 99 ><DT |
100 ><A | |
101 HREF="sdladdtimer.html" | |
102 >SDL_AddTimer</A | |
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103 > -- Add a timer which will call a callback after the specified number of milliseconds has |
0 | 104 elapsed.</DT |
105 ><DT | |
106 ><A | |
107 HREF="sdlremovetimer.html" | |
108 >SDL_RemoveTimer</A | |
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109 > -- Remove a timer which was added with |
0 | 110 <A |
111 HREF="sdladdtimer.html" | |
112 >SDL_AddTimer</A | |
113 >.</DT | |
114 ><DT | |
115 ><A | |
116 HREF="sdlsettimer.html" | |
117 >SDL_SetTimer</A | |
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118 > -- Set a callback to run after the specified number of milliseconds has |
0 | 119 elapsed.</DT |
120 ></DL | |
121 ></DIV | |
122 ><P | |
123 >SDL provides several cross-platform functions for dealing with time. | |
124 It provides a way to get the current time, a way to wait a little while, | |
125 and a simple timer mechanism. These functions give you two ways of moving an | |
126 object every x milliseconds: | |
127 | |
128 <P | |
129 ></P | |
130 ><UL | |
131 ><LI | |
132 ><P | |
133 >Use a timer callback function. This may have the bad effect that it runs in a seperate thread or uses alarm signals, but it's easier to implement.</P | |
134 ></LI | |
135 ><LI | |
136 ><P | |
137 >Or you can get the number of milliseconds passed, and move the object if, for example, 30 ms passed.</P | |
138 ></LI | |
139 ></UL | |
140 > </P | |
141 ></DIV | |
142 ><DIV | |
143 CLASS="NAVFOOTER" | |
144 ><HR | |
145 ALIGN="LEFT" | |
146 WIDTH="100%"><TABLE | |
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147 SUMMARY="Footer navigation table" |
0 | 148 WIDTH="100%" |
149 BORDER="0" | |
150 CELLPADDING="0" | |
151 CELLSPACING="0" | |
152 ><TR | |
153 ><TD | |
154 WIDTH="33%" | |
155 ALIGN="left" | |
156 VALIGN="top" | |
157 ><A | |
158 HREF="sdlcondwaittimeout.html" | |
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159 ACCESSKEY="P" |
0 | 160 >Prev</A |
161 ></TD | |
162 ><TD | |
163 WIDTH="34%" | |
164 ALIGN="center" | |
165 VALIGN="top" | |
166 ><A | |
167 HREF="index.html" | |
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168 ACCESSKEY="H" |
0 | 169 >Home</A |
170 ></TD | |
171 ><TD | |
172 WIDTH="33%" | |
173 ALIGN="right" | |
174 VALIGN="top" | |
175 ><A | |
176 HREF="sdlgetticks.html" | |
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177 ACCESSKEY="N" |
0 | 178 >Next</A |
179 ></TD | |
180 ></TR | |
181 ><TR | |
182 ><TD | |
183 WIDTH="33%" | |
184 ALIGN="left" | |
185 VALIGN="top" | |
186 >SDL_CondWaitTimeout</TD | |
187 ><TD | |
188 WIDTH="34%" | |
189 ALIGN="center" | |
190 VALIGN="top" | |
191 ><A | |
192 HREF="reference.html" | |
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193 ACCESSKEY="U" |
0 | 194 >Up</A |
195 ></TD | |
196 ><TD | |
197 WIDTH="33%" | |
198 ALIGN="right" | |
199 VALIGN="top" | |
200 >SDL_GetTicks</TD | |
201 ></TR | |
202 ></TABLE | |
203 ></DIV | |
204 ></BODY | |
205 ></HTML | |
206 > |