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fli_bmp_dirty_from.3alleg
Langue: en
Version: version 4.2.2 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
fli_bmp_dirty_from, fli_bmp_dirty_to - Indicate which parts of the image have changed. Allegro game programming library.SYNOPSIS
#include <allegro.h>extern int fli_bmp_dirty_from;
extern int fli_bmp_dirty_to;
DESCRIPTION
These 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);
SEE ALSO
fli_bitmap(3alleg), reset_fli_variables(3alleg)Contenus ©2006-2024 Benjamin Poulain
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