Mercurial > sdl-ios-xcode
annotate docs/html/guidethebasics.html @ 1240:3b8a43c428bb
From Bug #36:
There are a couple of issues with the selection of Altivec alpha-blitting
routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c.
1) There's no check for the presence of Altivec when checking if the
Blit32to565PixelAlphaAltivec() routine can be selected.
2) Altivec cannot be used in video memory, and there's no check if the
destination surface is a hardware surface. (Alpha-blitting to a hardware
surface with GPU support is a bad idea, but somebody's bound to do it anyway.)
Patch to fix these attached.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 08 Jan 2006 21:18:15 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 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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parents:
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diff
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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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Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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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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parents:
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diff
changeset
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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" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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76 ></A |
|
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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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" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
103 ></A |
|
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
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 | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
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" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
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" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
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" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
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" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
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 > |