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Date: Sat, 14 Feb 2004 14:52:40 +0200 From: "Mike Gorchak" Subject: Batch of the QNX6 fixes for the SDL 1. Updated readme.QNX 2. Fixed crashes during intensive window updating under fast machines (got over 200 rectangles for update). 3. Fixed double-buffered fullscreen modes, now it works as needed. 4. Fixed Photon detection algorithm. 5. Fixed HWSURFACE update function. 6. Added SDL_PHOTON_FULLSCREEN_REFRESH environment variable support for control refresh rates under Photon. 7. Added 640x400 fullscreen mode emulation via 640x480 (if videodriver not supports original 640x400 mode of course) shifted by 40 vertical pixels from begin, to center it. It's needed for some old DOS games which ran in doubled 320x200 mode. 8. Added available video ram amount support. 8. Added hardware surface allocation/deallocation support if current videomode and videodriver supports it. 9. Added hardware filling support. 10. Added hardware blits support (simple and colorkeyed). And I've added to testvidinfo test color-keyed blits benchmark (maybe need to add alpha blits benchmark too ?). Currently Photon not supporting any alpha hardware blittings (all drivers lack of alpha blitting code support, only software alpha blitting exist in photon, which is hundreds times slowest than the SDL's one). So I've not added the alpha support. I suppose new QNX 6.3 will have the hardware alpha support, so when it will be done, I'll add alpha support.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 14 Feb 2004 20:22:21 +0000
parents 355632dca928
children
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<HTML
><HEAD
><TITLE
>SDL_LoadWAV</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
TITLE="SDL Library Documentation"
HREF="index.html"><LINK
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TITLE="Audio"
HREF="audio.html"><LINK
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><BODY
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><HR
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><H1
><A
NAME="SDLLOADWAV"
></A
>SDL_LoadWAV</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN6816"
></A
><H2
>Name</H2
>SDL_LoadWAV&nbsp;--&nbsp;Load a WAVE file</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN6819"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN6820"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>SDL_AudioSpec *<B
CLASS="FSFUNC"
>SDL_LoadWAV</B
></CODE
>(const char *file, SDL_AudioSpec *spec, Uint8 **audio_buf, Uint32 *audio_len);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6826"
></A
><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_LoadWAV</TT
>
This function loads a WAVE <TT
CLASS="PARAMETER"
><I
>file</I
></TT
> into memory.</P
><P
>If this function succeeds, it returns the given 
<A
HREF="sdlaudiospec.html"
><TT
CLASS="FUNCTION"
>SDL_AudioSpec</TT
></A
>, 
filled with the audio data format of the wave data, and sets 
<TT
CLASS="PARAMETER"
><I
>audio_buf</I
></TT
> to a <TT
CLASS="FUNCTION"
>malloc</TT
>'d 
buffer containing the audio data, and sets <TT
CLASS="PARAMETER"
><I
>audio_len</I
></TT
> 
to the length of that audio buffer, in bytes.  You need to free the audio 
buffer with <A
HREF="sdlfreewav.html"
><TT
CLASS="FUNCTION"
>SDL_FreeWAV</TT
></A
> when you are
done with it.</P
><P
>This function returns <TT
CLASS="LITERAL"
>NULL</TT
> and sets the SDL 
error message if the wave file cannot be opened, uses an unknown data format, 
or is corrupt.  Currently raw, MS-ADPCM and IMA-ADPCM WAVE files are supported.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6841"
></A
><H2
>Example</H2
><PRE
CLASS="PROGRAMLISTING"
>SDL_AudioSpec wav_spec;
Uint32 wav_length;
Uint8 *wav_buffer;

/* Load the WAV */
if( SDL_LoadWAV("test.wav", &#38;wav_spec, &#38;wav_buffer, &#38;wav_length) == NULL ){
  fprintf(stderr, "Could not open test.wav: %s\n", SDL_GetError());
  exit(-1);
}
.
.
.
/* Do stuff with the WAV */
.
.
/* Free It */
SDL_FreeWAV(wav_buffer);</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN6844"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlaudiospec.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_AudioSpec</SPAN
></A
>,
<A
HREF="sdlopenaudio.html"
><TT
CLASS="FUNCTION"
>SDL_OpenAudio</TT
></A
>,
<A
HREF="sdlfreewav.html"
><TT
CLASS="FUNCTION"
>SDL_FreeWAV</TT
></A
></P
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>