GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  SET_CLIP_RECT (3)

NAME

set_clip_rect - Sets the clipping rectangle of a bitmap. Allegro game programming library.

CONTENTS

Synopsis
Description
See Also

SYNOPSIS

#include <allegro.h>

void set_clip_rect(BITMAP *bitmap, int x1, int y1, int x2, int y2);

DESCRIPTION

Each bitmap has an associated clipping rectangle, which is the area of the image that it is OK to draw onto. Nothing will be drawn to positions outside this space. This function sets the clipping rectangle for the specified bitmap. Pass the coordinates of the top-left and bottom-right corners of the clipping rectangle in this order; these are both inclusive, i.e. set_clip_rect(bitmap, 16, 16, 32, 32) will allow drawing to (16, 16) and (32, 32), but not to (15, 15) and (33, 33).

Drawing operations will be performed (at least partially) on the bitmap as long as the first coordinates of its clipping rectangle are not greater than the second coordinates and its intersection with the actual image is non-empty. If either condition is not fulfilled, drawing will be turned off for the bitmap, e.g.

   set_clip_rect(bmp, 0, 0, -1, -1); /* disable drawing on bmp */

Note that passing "out-of-bitmap" coordinates is allowed, but they are likely to be altered (and so the coordinates returned by get_clip_rect() will be different). However, such modifications are guaranteed to preserve the external effect of the clipping rectangle, that is not to modify the actual area of the image that it is OK to draw onto.

SEE ALSO

get_clip_rect(3), add_clip_rect(3), set_clip_state(3), get_clip_state(3), ex12bit(3), excamera(3)
Search for    or go to Top of page |  Section 3 |  Main Index


Allegro SET_CLIP_RECT (3) version 4.4.2

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.