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| BITMAP(3) | Allegro manual | BITMAP(3) |
NAME
BITMAP - Stores the contents of a bitmap. Allegro game programming library.SYNOPSIS
#include <allegro.h>typedef struct BITMAP
DESCRIPTION
int w, h; - size of the bitmap in pixels
int clip; - non-zero if clipping is turned on
int cl, cr, ct, cb; - clip rectangle left, right, top,
and bottom
unsigned char *line[]; - pointers to the start of each line
There is some other stuff in the structure as well, but it is liable to change
and you shouldn't use anything except the above. The `w' and `h' fields can be
used to obtain the size of an existing bitmap:
bmp = load_bitmap("file.bmp", pal);
allegro_message("Bitmap size: (%dx%d)\n", bmp->w, bmp->h);
The clipping rectangle is inclusive on the left and top (0 allows drawing to
position 0) but exclusive on the right and bottom (10 allows drawing to
position 9, but not to 10). Note this is not the same format as that of the
clipping API, which takes inclusive coordinates for all four corners. All the
values of this structure should be regarded as read-only, with the exception
of the line field, whose access is described in depth in the "Direct
access to video memory" section of the manual. If you want to modify the
clipping region, please refrain from changing this structure. Use
set_clip_rect() instead.
SEE ALSO
create_bitmap(3), set_clip_rect(3), bitmap_color_depth(3), RLE_SPRITE(3), COMPILED_SPRITE(3)| version 4.4.3 | Allegro |
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