[sdl_omap.git] / docs / html / sdlgetrgba.html

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>SDL_GetRGBA</H1
><DIV
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NAME="AEN1747"
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><H2
>Name</H2
>SDL_GetRGBA&nbsp;--&nbsp;Get RGBA values from a pixel in the specified pixel format.</DIV
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CLASS="REFSYNOPSISDIV"
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>Synopsis</H2
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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_GetRGBA</B
></CODE
>(Uint32 pixel, SDL_PixelFormat *fmt, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);</CODE
></P
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CLASS="REFSECT1"
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NAME="AEN1757"
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><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
HREF="sdlmaprgb.html"
>SDL_MapRGB</A
>,
<A
HREF="sdlmaprgba.html"
>SDL_MapRGBA</A
>,
<A
HREF="sdlpixelformat.html"
>SDL_PixelFormat</A
></P
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Commit	Line	Data
e14743d1	1	<HTML
	2	><HEAD
	3	><TITLE
	4	>SDL_GetRGBA</TITLE
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	7	CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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	10	TITLE="SDL Library Documentation"
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	14	HREF="video.html"><LINK
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	40	>SDL Library Documentation</TH
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	44	WIDTH="10%"
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	46	VALIGN="bottom"
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	50	>Prev</A
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	64	>Next</A
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66	></TR
67	></TABLE
68	><HR
69	ALIGN="LEFT"
70	WIDTH="100%"></DIV
71	><H1
72	><A
73	NAME="SDLGETRGBA"
74	></A
75	>SDL_GetRGBA</H1
76	><DIV
77	CLASS="REFNAMEDIV"
78	><A
79	NAME="AEN1747"
80	></A
81	><H2
82	>Name</H2
83	>SDL_GetRGBA -- Get RGBA values from a pixel in the specified pixel format.</DIV
84	><DIV
85	CLASS="REFSYNOPSISDIV"
86	><A
87	NAME="AEN1750"
88	></A
89	><H2
90	>Synopsis</H2
91	><DIV
92	CLASS="FUNCSYNOPSIS"
93	><A
94	NAME="AEN1751"
95	></A
96	><P
97	></P
98	><PRE
99	CLASS="FUNCSYNOPSISINFO"
100	>#include "SDL.h"</PRE
101	><P
102	><CODE
103	><CODE
104	CLASS="FUNCDEF"
105	>void <B
106	CLASS="FSFUNC"
107	>SDL_GetRGBA</B
108	></CODE
109	>(Uint32 pixel, SDL_PixelFormat fmt, Uint8 r, Uint8 g, Uint8 b, Uint8 *a);</CODE
110	></P
111	><P
112	></P
113	></DIV
114	></DIV
115	><DIV
116	CLASS="REFSECT1"
117	><A
118	NAME="AEN1757"
119	></A
120	><H2
121	>Description</H2
122	><P
123	>Get RGBA component values from a pixel stored in the specified pixel format.</P
124	><P
125	>This function uses the entire 8-bit [0..255] range when converting color
126	components from pixel formats with less than 8-bits per RGB component
127	(e.g., a completely white pixel in 16-bit RGB565 format would return
128	[0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).</P
129	><P
130	>If the surface has no alpha component, the alpha will be returned as 0xff
131	(100% opaque).</P
132	></DIV
133	><DIV
134	CLASS="REFSECT1"
135	><A
136	NAME="AEN1762"
137	></A
138	><H2
139	>See Also</H2
140	><P
141	><A
142	HREF="sdlgetrgb.html"
143	>SDL_GetRGB</A
144	>,
145	<A
146	HREF="sdlmaprgb.html"
147	>SDL_MapRGB</A
148	>,
149	<A
150	HREF="sdlmaprgba.html"
151	>SDL_MapRGBA</A
152	>,
153	<A
154	HREF="sdlpixelformat.html"
155	>SDL_PixelFormat</A
156	></P
157	></DIV
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174	HREF="sdlgetrgb.html"
175	ACCESSKEY="P"
176	>Prev</A
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183	HREF="index.html"
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185	>Home</A
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194	>Next</A
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196	></TR
197	><TR
198	><TD
199	WIDTH="33%"
200	ALIGN="left"
201	VALIGN="top"
202	>SDL_GetRGB</TD
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204	WIDTH="34%"
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206	VALIGN="top"
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208	HREF="video.html"
209	ACCESSKEY="U"
210	>Up</A
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213	WIDTH="33%"
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216	>SDL_CreateRGBSurface</TD
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222	>