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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 720a96badf51
children
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<HTML
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>SDL_ExposeEvent</H1
><DIV
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><H2
>Name</H2
>SDL_ExposeEvent&nbsp;--&nbsp;Quit requested event</DIV
><DIV
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></A
><H2
>Structure Definition</H2
><PRE
CLASS="PROGRAMLISTING"
>typedef struct{
  Uint8 type
} SDL_ExposeEvent;</PRE
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><TT
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>type</I
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><TD
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><TT
CLASS="LITERAL"
>SDL_VIDEOEXPOSE</TT
></TD
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><H2
>Description</H2
><P
><SPAN
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>SDL_ExposeEvent</SPAN
> is a member of the <A
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><SPAN
CLASS="STRUCTNAME"
>SDL_Event</SPAN
></A
> union and is used whan an event of type <TT
CLASS="LITERAL"
>SDL_VIDEOEXPOSE</TT
> is reported.</P
><P
>A VIDEOEXPOSE event is triggered when the screen has been modified
outside of the application, usually by the window manager and needs to
be redrawn.</P
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