bionic (3) exalpha.3alleg4.gz

NAME

       exalpha - Creating and using 32 bit RGBA sprites. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       Example exalpha

DESCRIPTION

       This  program  demonstrates  how  to use the 32 bit RGBA translucency functions to store an alpha channel
       along with a bitmap graphic.  Two images are loaded from disk. One will be used for  the  background  and
       the  other as a sprite. The example generates an alpha channel for the sprite image, composing the 32 bit
       RGBA bitmap during runtime, and draws it at the position of the mouse cursor.

SEE ALSO

       BITMAP(3alleg4),  END_OF_MAIN(3alleg4),  SCREEN_H(3alleg4),  SCREEN_W(3alleg4),   allegro_error(3alleg4),
       allegro_init(3alleg4),        allegro_message(3alleg4),       blit(3alleg4),       clear_keybuf(3alleg4),
       create_bitmap(3alleg4),   destroy_bitmap(3alleg4),   draw_trans_sprite(3alleg4),   drawing_mode(3alleg4),
       font(3alleg4), getb(3alleg4), getg(3alleg4), getpixel(3alleg4), getr(3alleg4), install_keyboard(3alleg4),
       install_mouse(3alleg4),      install_timer(3alleg4),      keypressed(3alleg4),      load_bitmap(3alleg4),
       makecol(3alleg4),     mouse_x(3alleg4),     mouse_y(3alleg4),    putpixel(3alleg4),    rectfill(3alleg4),
       replace_filename(3alleg4),  screen(3alleg4),  set_alpha_blender(3alleg4),  set_color_conversion(3alleg4),
       set_color_depth(3alleg4),              set_gfx_mode(3alleg4),              set_multiply_blender(3alleg4),
       set_write_alpha_blender(3alleg4), solid_mode(3alleg4), stretch_blit(3alleg4), textprintf_ex(3alleg4)