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annotate docs/man3/SDL_UpdateRects.3 @ 1039:68f2b997758e

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Added testblitspeed to aid in profiling of SDL's blitters.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 15 Feb 2005 11:50:33 +0000
parents e5bc29de3f0a
children 546f7c1eb755
rev   line source
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e5bc29de3f0a Updated from the SDL Documentation Project
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1 .TH "SDL_UpdateRects" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_UpdateRects\- Makes sure the given list of rectangles is updated on the given screen\&.
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 .sp
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8 \fBvoid \fBSDL_UpdateRects\fP\fR(\fBSDL_Surface *screen, int numrects, SDL_Rect *rects\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 Makes sure the given list of rectangles is updated on the given screen\&. The rectangles must all be confined within the screen boundaries (no clipping is done)\&.
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12 .PP
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13 This function should not be called while \fBscreen\fR is \fIlocked\fR\&.
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14 .PP
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15 .RS
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16 \fBNote:
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17 .PP
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18 It is adviced to call this function only once per frame, since each call has some processing overhead\&. This is no restriction since you can pass any number of rectangles each time\&.
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19 .PP
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20 The rectangles are not automatically merged or checked for overlap\&. In general, the programmer can use his knowledge about his particular rectangles to merge them in an efficient way, to avoid overdraw\&.
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21 .RE
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22 .SH "SEE ALSO"
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23 .PP
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24 \fI\fBSDL_UpdateRect\fP\fR, \fI\fBSDL_Rect\fR\fR, \fI\fBSDL_Surface\fR\fR, \fI\fBSDL_LockSurface\fP\fR
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25 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01