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symbian-qemu-0.9.1-12/libsdl-trunk/docs/html/sdlsetgammaramp.html
author johnathan.white@2718R8BGH51.accenture.com
Mon, 08 Mar 2010 18:45:03 +0000
changeset 46 b6935a90ca64
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<HTML
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><HEAD
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><TITLE
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>SDL_SetGammaRamp</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="SDL Library Documentation"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Video"
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HREF="video.html"><LINK
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REL="PREVIOUS"
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TITLE="SDL_GetGammaRamp"
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HREF="sdlgetgammaramp.html"><LINK
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REL="NEXT"
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TITLE="SDL_MapRGB"
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HREF="sdlmaprgb.html"></HEAD
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><BODY
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CLASS="REFENTRY"
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BGCOLOR="#FFF8DC"
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TEXT="#000000"
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LINK="#0000ee"
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VLINK="#551a8b"
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ALINK="#ff0000"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>SDL Library Documentation</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="sdlgetgammaramp.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="sdlmaprgb.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><H1
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><A
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NAME="SDLSETGAMMARAMP"
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></A
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>SDL_SetGammaRamp</H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN1624"
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></A
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><H2
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>Name</H2
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>SDL_SetGammaRamp&nbsp;--&nbsp;Sets the color gamma lookup tables for the display</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN1627"
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></A
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><H2
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>Synopsis</H2
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><DIV
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CLASS="FUNCSYNOPSIS"
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><A
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NAME="AEN1628"
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></A
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><P
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></P
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><PRE
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CLASS="FUNCSYNOPSISINFO"
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>#include "SDL.h"</PRE
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><P
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><CODE
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><CODE
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CLASS="FUNCDEF"
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>int <B
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CLASS="FSFUNC"
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>SDL_SetGammaRamp</B
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></CODE
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>(Uint16 *redtable, Uint16 *greentable, Uint16 *bluetable);</CODE
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></P
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><P
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></P
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN1634"
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></A
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><H2
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>Description</H2
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><P
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>Sets the gamma lookup tables for the display for each color component.
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Each table is an array of 256 Uint16 values, representing a mapping
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between the input and output for that channel. The input is the index
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into the array, and the output is the 16-bit gamma value at that index,
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scaled to the output color precision. You may pass NULL to any of the
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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channels to leave them unchanged.</P
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><P
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>This function adjusts the gamma based on lookup tables, you can also
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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have the gamma calculated based on a "gamma function" parameter with
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<A
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HREF="sdlsetgamma.html"
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>SDL_SetGamma</A
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>.</P
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><P
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>Not all display hardware is able to change gamma.</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN1640"
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></A
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><H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Return Value</H2
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><P
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>Returns -1 on error (or if gamma adjustment is not supported).</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN1643"
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></A
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><H2
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>See Also</H2
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><P
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><A
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HREF="sdlsetgamma.html"
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>SDL_SetGamma</A
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>
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<A
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HREF="sdlgetgammaramp.html"
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>SDL_GetGammaRamp</A
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></P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="sdlgetgammaramp.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   191
 
HREF="index.html"
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ACCESSKEY="H"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="sdlmaprgb.html"
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ACCESSKEY="N"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>SDL_GetGammaRamp</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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HREF="video.html"
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ACCESSKEY="U"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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>SDL_MapRGB</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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>
MCL/sf/adapt/qemu