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255 lines
3.5 KiB
255 lines
3.5 KiB
<HTML |
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>SDL_UpdateRects</TITLE |
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TITLE="SDL_UpdateRect" |
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>SDL Library Documentation</TH |
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><H1 |
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><A |
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>SDL_UpdateRects</H1 |
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><DIV |
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CLASS="REFNAMEDIV" |
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><A |
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NAME="AEN1392" |
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></A |
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><H2 |
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>Name</H2 |
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>SDL_UpdateRects -- Makes sure the given list of rectangles is updated on the given screen.</DIV |
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><DIV |
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CLASS="REFSYNOPSISDIV" |
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><A |
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NAME="AEN1395" |
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><H2 |
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>Synopsis</H2 |
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></A |
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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_UpdateRects</B |
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></CODE |
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>(SDL_Surface *screen, int numrects, SDL_Rect *rects);</CODE |
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></P |
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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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>Makes sure the given list of rectangles is updated on the given screen. |
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The rectangles must all be confined within the screen boundaries (no |
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clipping is done).</P |
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><P |
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>This function should not be called while <TT |
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CLASS="PARAMETER" |
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><I |
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>screen</I |
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></TT |
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> is |
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<A |
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HREF="sdllocksurface.html" |
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>locked</A |
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>.</P |
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CLASS="NOTE" |
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><BLOCKQUOTE |
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CLASS="NOTE" |
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><P |
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><B |
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>Note: </B |
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>It is adviced to call this function only once per frame, since each |
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call has some processing overhead. This is no restriction since you |
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can pass any number of rectangles each time.</P |
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><P |
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>The rectangles are not automatically merged or checked for overlap. In |
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general, the programmer can use his knowledge about his particular |
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rectangles to merge them in an efficient way, to avoid overdraw.</P |
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></BLOCKQUOTE |
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><A |
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NAME="AEN1411" |
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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="sdlupdaterect.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_UpdateRect</TT |
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></A |
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>, |
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<A |
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HREF="sdlrect.html" |
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><SPAN |
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CLASS="STRUCTNAME" |
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>SDL_Rect</SPAN |
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></A |
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>, |
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<A |
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HREF="sdlsurface.html" |
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><SPAN |
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CLASS="STRUCTNAME" |
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>SDL_Surface</SPAN |
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></A |
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>, |
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<A |
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HREF="sdllocksurface.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_LockSurface</TT |
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></A |
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