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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
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>SDL_Delay</H1
><DIV
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><H2
>Name</H2
>SDL_Delay&nbsp;--&nbsp;Wait a specified number of milliseconds before returning.</DIV
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><P
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><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>void <B
CLASS="FSFUNC"
>SDL_Delay</B
></CODE
>(Uint32 ms);</CODE
></P
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><H2
>Description</H2
><P
>Wait a specified number of milliseconds before returning. <TT
CLASS="FUNCTION"
>SDL_Delay</TT
> will wait at <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>least</I
></SPAN
> the specified time, but possible longer due to OS scheduling.</P
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><BLOCKQUOTE
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><P
><B
>Note: </B
>Count on a delay granularity of <SPAN
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>at least</I
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> 10 ms.
Some platforms have shorter clock ticks but this is the most common.</P
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>SDL_AddTimer</TT
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