214 lines
2.9 KiB
HTML
214 lines
2.9 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>SDL_GetRGBA</TITLE
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.64
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TITLE="SDL_GetRGB"
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TITLE="SDL_CreateRGBSurface"
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>SDL Library Documentation</TH
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><H1
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><A
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NAME="SDLGETRGBA"
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>SDL_GetRGBA</A
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></H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN1332"
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></A
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><H2
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>Name</H2
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>SDL_GetRGBA -- Get RGBA values from a pixel in the specified pixel format.</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN1335"
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></A
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><H2
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>Synopsis</H2
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><DIV
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CLASS="FUNCSYNOPSIS"
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><A
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NAME="AEN1336"
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></A
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><P
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></P
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><PRE
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CLASS="FUNCSYNOPSISINFO"
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>#include "SDL.h"</PRE
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><P
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><CODE
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><CODE
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CLASS="FUNCDEF"
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>void <B
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CLASS="FSFUNC"
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>SDL_GetRGBA</B
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></CODE
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>(Uint32 pixel, SDL_PixelFormat *fmt, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);</CODE
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></P
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CLASS="REFSECT1"
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><A
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NAME="AEN1342"
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></A
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><H2
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>Description</H2
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><P
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>Get RGBA component values from a pixel stored in the specified pixel format.</P
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><P
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>This function uses the entire 8-bit [0..255] range when converting color
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components from pixel formats with less than 8-bits per RGB component
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(e.g., a completely white pixel in 16-bit RGB565 format would return
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[0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).</P
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><P
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>If the surface has no alpha component, the alpha will be returned as 0xff
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(100% opaque).</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN1347"
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></A
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><H2
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>See Also</H2
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><P
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><A
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HREF="sdlgetrgb.html"
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>SDL_GetRGB</A
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>,
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<A
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HREF="sdlmaprgb.html"
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>SDL_MapRGB</A
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>,
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<A
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HREF="sdlmaprgba.html"
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>SDL_MapRGBA</A
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>,
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<A
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HREF="sdlpixelformat.html"
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>SDL_PixelFormat</A
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></P
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HREF="sdlgetrgb.html"
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>Prev</A
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>Next</A
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>SDL_GetRGB</TD
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>SDL_CreateRGBSurface</TD
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> |