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Date: Sat, 27 Nov 2004 13:35:43 +0100 From: "Martin Bickel" Subject: [SDL] Patch: fixing uninitilized palette while running Valgrind over my application I found the following problem in SDL: The function MapNto1 allocates SDL_Color colors[256] but does not initialize it. SDL_DitherColors is then called which initialized the r, g and b component, but not the 'unused' component of each color. When Map1to1 is called from MapNto1, it runs a memcmp on the colors, which also evaluates the unused component and therefor returns differences much more often than necessary. So the 'unused' component of SDL_Color should be initialized. This patch does this by calling memset for the whole array in MapNto1 .
author Sam Lantinga <slouken@libsdl.org>
date Tue, 30 Nov 2004 14:28:20 +0000
parents 355632dca928
children
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<HTML
><HEAD
><TITLE
>Window Management</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
TITLE="SDL Library Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="SDL Reference"
HREF="reference.html"><LINK
REL="PREVIOUS"
TITLE="SDL_Overlay"
HREF="sdloverlay.html"><LINK
REL="NEXT"
TITLE="SDL_WM_SetCaption"
HREF="sdlwmsetcaption.html"><META
NAME="KEYWORD"
CONTENT="wm"><META
NAME="KEYWORD"
CONTENT="function"></HEAD
><BODY
CLASS="CHAPTER"
BGCOLOR="#FFF8DC"
TEXT="#000000"
LINK="#0000ee"
VLINK="#551a8b"
ALINK="#ff0000"
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>SDL Library Documentation</TH
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><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="CHAPTER"
><H1
><A
NAME="WM"
></A
>Chapter 7. Window Management</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="sdlwmsetcaption.html"
>SDL_WM_SetCaption</A
>&nbsp;--&nbsp;Sets the window tile and icon name.</DT
><DT
><A
HREF="sdlwmgetcaption.html"
>SDL_WM_GetCaption</A
>&nbsp;--&nbsp;Gets the window title and icon name.</DT
><DT
><A
HREF="sdlwmseticon.html"
>SDL_WM_SetIcon</A
>&nbsp;--&nbsp;Sets the icon for the display window.</DT
><DT
><A
HREF="sdlwmiconifywindow.html"
>SDL_WM_IconifyWindow</A
>&nbsp;--&nbsp;Iconify/Minimise the window</DT
><DT
><A
HREF="sdlwmtogglefullscreen.html"
>SDL_WM_ToggleFullScreen</A
>&nbsp;--&nbsp;Toggles fullscreen mode</DT
><DT
><A
HREF="sdlwmgrabinput.html"
>SDL_WM_GrabInput</A
>&nbsp;--&nbsp;Grabs mouse and keyboard input.</DT
></DL
></DIV
><P
>SDL provides a small set of window management functions which allow applications to change their title and toggle from windowed mode to fullscreen (if available)</P
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