fli_bmp_dirty_from - Online Linux Manual PageSection : 3
Updated : version 4.4.3
Source : Allegro
Note : Allegro manual

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NAMEfli_bmp_dirty_from, fli_bmp_dirty_to − Indicate which parts of the image have changed. Allegro game programming library.​

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SYNOPSIS#include <allegro.h> extern int fli_bmp_dirty_from; extern int fli_bmp_dirty_to;

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DESCRIPTIONThese variables are set by next_fli_frame() to indicate which part of the fli_bitmap has changed since the last call to reset_fli_variables(). If fli_bmp_dirty_from is greater than fli_bmp_dirty_to, the bitmap has not changed, otherwise lines fli_bmp_dirty_from to fli_bmp_dirty_to (inclusive) have altered. You can use these when copying the fli_bitmap onto the screen, to avoid moving data unnecessarily. Example: if (fli_bmp_dirty_from <= fli_bmp_dirty_to) blit(fli_bitmap, screen, 0, fli_bmp_dirty_from, 0, fli_bmp_dirty_from, fli_bitmap->w, fli_bmp_dirty_to - fli_bmp_dirty_from + 1);

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SEE ALSOfli_bitmap(3), reset_fli_variables(3) 0

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