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Date: Thu, 21 Feb 2002 09:18:24 +0200 From: "Mike Gorchak" <mike@malva.ua> Subject: Re: Patches for QNX RtP again. SDL_ph_image.c - Added OpenGL update functions - fixed some application crashes. Some dead code removed, reformatting some functions. SDL_ph_image_c.h - Added OpenGL update function prototype. SDL_ph_video.c - Added GL_GetAttribute and GL_SetAttribute functions with next supported flags: SDL_GL_DOUBLEBUFFER, SDL_GL_STENCIL_SIZE, SDL_GL_DEPTH_SIZE GetWMInfo function (stub) has been implemented by me, but not listed in device structure - fixed. SDL_ph_wm.c - fixed warning 'no return in non-void function'. README.QNX - Updating readme. Some spellcheck. ;-)
author Sam Lantinga <slouken@libsdl.org>
date Sat, 02 Mar 2002 16:50:35 +0000
parents e5bc29de3f0a
children 355632dca928
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<HTML
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>SDL_GetRGBA</TITLE
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><H1
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>SDL_GetRGBA</A
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><DIV
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><A
NAME="AEN1363"
></A
><H2
>Name</H2
>SDL_GetRGBA&nbsp;--&nbsp;Get RGBA values from a pixel in the specified pixel format.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN1366"
></A
><H2
>Synopsis</H2
><DIV
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>void <B
CLASS="FSFUNC"
>SDL_GetRGBA</B
></CODE
>(Uint32 pixel, SDL_PixelFormat *fmt, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);</CODE
></P
><P
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></DIV
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><DIV
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><A
NAME="AEN1373"
></A
><H2
>Description</H2
><P
>Get RGBA component values from a pixel stored in the specified pixel format.</P
><P
>This function uses the entire 8-bit [0..255] range when converting color
components from pixel formats with less than 8-bits per RGB component
(e.g., a completely white pixel in 16-bit RGB565 format would return
[0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).</P
><P
>If the surface has no alpha component, the alpha will be returned as 0xff
(100% opaque).</P
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>See Also</H2
><P
><A
HREF="sdlgetrgb.html"
>SDL_GetRGB</A
>,
<A
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>SDL_MapRGB</A
>,
<A
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>SDL_MapRGBA</A
>,
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>SDL_PixelFormat</A
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