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set_clip_state(3alleg4) [opendarwin man page]

set_clip_state(3alleg4) 					  Allegro manual					   set_clip_state(3alleg4)

set_clip_state - Turns on or off the clipping of a bitmap. Allegro game programming library. SYNOPSIS
#include <allegro.h> void set_clip_state(BITMAP *bitmap, int state) DESCRIPTION
Turns on (if state is non-zero) or off (if state is zero) clipping for the specified bitmap. Turning clipping off may slightly speed up some drawing operations (usually a negligible difference, although every little helps) but will result in your program dying a horrible death if you try to draw beyond the edges of the bitmap. SEE ALSO
set_clip_rect(3alleg4), get_clip_rect(3alleg4), add_clip_rect(3alleg4), get_clip_state(3alleg4) Allegro version 4.4.2 set_clip_state(3alleg4)

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set_clip_rect(3alleg4)						  Allegro manual					    set_clip_rect(3alleg4)

set_clip_rect - Sets the clipping rectangle of a bitmap. Allegro game programming library. 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 posi- tions outside this space. This function sets the clipping rectangle for the specified bitmap. Pass the coordinates of the top-left and bot- tom-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(3alleg4), add_clip_rect(3alleg4), set_clip_state(3alleg4), get_clip_state(3alleg4), ex12bit(3alleg4), excamera(3alleg4) Allegro version 4.4.2 set_clip_rect(3alleg4)
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