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is_linear_bitmap(3alleg4) [opendarwin man page]

is_linear_bitmap(3alleg4)					  Allegro manual					 is_linear_bitmap(3alleg4)

       is_linear_bitmap - Tells if a bitmap is linear. Allegro game programming library.

       #include <allegro.h>

       int is_linear_bitmap(BITMAP *bmp);

       Returns	TRUE if bmp is a linear bitmap, i.e. a bitmap that can be accessed linearly within each scanline (for example a memory bitmap, the
       DOS VGA or SVGA screen, Windows bitmaps, etc). Linear bitmaps  can  be  used  with  the	_putpixel(),  _getpixel(),  bmp_write_line(),  and
       bmp_read_line() functions.

       Historically there were only linear and planar bitmaps for Allegro, so is_linear_bitmap() is actually an alias for !is_planar_bitmap().

       is_planar_bitmap(3alleg4), is_memory_bitmap(3alleg4)

Allegro 							   version 4.4.2					 is_linear_bitmap(3alleg4)

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bitmap_mask_color(3alleg4)					  Allegro manual					bitmap_mask_color(3alleg4)

bitmap_mask_color - Returns the mask color of the specified bitmap. Allegro game programming library. SYNOPSIS
#include <allegro.h> int bitmap_mask_color(BITMAP *bmp); DESCRIPTION
Returns the mask color for the specified bitmap (the value which is skipped when drawing sprites). For 256-color bitmaps this is zero, and for truecolor bitmaps it is bright pink (maximum red and blue, zero green). A frequent use of this function is to clear a bitmap with the mask color so you can later use this bitmap with masked_blit() or draw_sprite() after drawing other stuff on it. Example: /* Replace mask color with another color. */ for (y = 0; y h; y++) for (x = 0; x w; x++) if (getpixel(bmp, x, y) == bitmap_mask_color(bmp)) putpixel(bmp, x, y, another_color); SEE ALSO
MASK_COLOR_8(3alleg4), set_color_depth(3alleg4), bitmap_color_depth(3alleg4), ex3d(3alleg4), exmouse(3alleg4), expat(3alleg4) Allegro version 4.4.2 bitmap_mask_color(3alleg4)
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