view docs/html/sdlwmseticon.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
line wrap: on
line source

<HTML
><HEAD
><TITLE
>SDL_WM_SetIcon</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="Window Management"
HREF="wm.html"><LINK
REL="PREVIOUS"
TITLE="SDL_WM_GetCaption"
HREF="sdlwmgetcaption.html"><LINK
REL="NEXT"
TITLE="SDL_WM_IconifyWindow"
HREF="sdlwmiconifywindow.html"></HEAD
><BODY
CLASS="REFENTRY"
BGCOLOR="#FFF8DC"
TEXT="#000000"
LINK="#0000ee"
VLINK="#551a8b"
ALINK="#ff0000"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>SDL Library Documentation</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="sdlwmgetcaption.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="sdlwmiconifywindow.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="SDLWMSETICON"
></A
>SDL_WM_SetIcon</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN3582"
></A
><H2
>Name</H2
>SDL_WM_SetIcon&nbsp;--&nbsp;Sets the icon for the display window.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN3585"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN3586"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>void <B
CLASS="FSFUNC"
>SDL_WM_SetIcon</B
></CODE
>(SDL_Surface *icon, Uint8 *mask);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3592"
></A
><H2
>Description</H2
><P
>Sets the icon for the display window. Win32 icons must be 32x32.</P
><P
>This function must be called before the first call to 
<A
HREF="sdlsetvideomode.html"
>SDL_SetVideoMode</A
>.</P
><P
>The <TT
CLASS="PARAMETER"
><I
>mask</I
></TT
> is a bitmask that describes the shape of the
icon. If <TT
CLASS="PARAMETER"
><I
>mask</I
></TT
> is NULL, then the shape is determined by
the colorkey of <TT
CLASS="PARAMETER"
><I
>icon</I
></TT
>, if any, or makes the icon
rectangular (no transparency) otherwise.</P
><P
>If <TT
CLASS="PARAMETER"
><I
>mask</I
></TT
> is non-NULL, it points to a bitmap with bits set
where the corresponding pixel should be visible. The format of the bitmap is as
follows: Scanlines come in the usual top-down order. Each scanline consists of
(width / 8) bytes, rounded up. The most significant bit of each byte represents
the leftmost pixel.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3603"
></A
><H2
>Example</H2
><PRE
CLASS="PROGRAMLISTING"
>SDL_WM_SetIcon(SDL_LoadBMP("icon.bmp"), NULL);</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3606"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlsetvideomode.html"
><TT
CLASS="FUNCTION"
>SDL_SetVideoMode</TT
></A
>,
<A
HREF="sdlwmsetcaption.html"
><TT
CLASS="FUNCTION"
>SDL_WM_SetCaption</TT
></A
></P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="sdlwmgetcaption.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="sdlwmiconifywindow.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>SDL_WM_GetCaption</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="wm.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>SDL_WM_IconifyWindow</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>