set_alpha_blender(3alleg4) Allegro manual set_alpha_blender(3alleg4)NAME
set_alpha_blender - Enables a special alpha-channel blending mode. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void set_alpha_blender();
DESCRIPTION
Enables the special alpha-channel blending mode, which is used for drawing 32-bit RGBA sprites. After calling this function, you can use
draw_trans_sprite() or draw_trans_rle_sprite() to draw a 32-bit source image onto any hicolor or truecolor destination. The alpha values
will be taken directly from the source graphic, so you can vary the solidity of each part of the image. You can't use any of the normal
translucency functions while this mode is active, though, so you should reset to one of the normal blender modes (eg. set_trans_blender())
before drawing anything other than 32-bit RGBA sprites.
SEE ALSO set_trans_blender(3alleg4), draw_trans_sprite(3alleg4), draw_trans_rle_sprite(3alleg4), set_write_alpha_blender(3alleg4), exalpha(3alleg4),
exrotscl(3alleg4), extrans(3alleg4)Allegro version 4.4.2 set_alpha_blender(3alleg4)
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set_alpha_blender(3alleg4) Allegro manual set_alpha_blender(3alleg4)NAME
set_alpha_blender - Enables a special alpha-channel blending mode. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void set_alpha_blender();
DESCRIPTION
Enables the special alpha-channel blending mode, which is used for drawing 32-bit RGBA sprites. After calling this function, you can use
draw_trans_sprite() or draw_trans_rle_sprite() to draw a 32-bit source image onto any hicolor or truecolor destination. The alpha values
will be taken directly from the source graphic, so you can vary the solidity of each part of the image. You can't use any of the normal
translucency functions while this mode is active, though, so you should reset to one of the normal blender modes (eg. set_trans_blender())
before drawing anything other than 32-bit RGBA sprites.
SEE ALSO set_trans_blender(3alleg4), draw_trans_sprite(3alleg4), draw_trans_rle_sprite(3alleg4), set_write_alpha_blender(3alleg4), exalpha(3alleg4),
exrotscl(3alleg4), extrans(3alleg4)Allegro version 4.4.2 set_alpha_blender(3alleg4)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)