FreeBSD Manual Pages
create_trans_table(3) Allegro manual create_trans_table(3) NAME create_trans_table - Fills a color mapping table for translucency effects. Allegro game programming library. SYNOPSIS #include <allegro.h> void create_trans_table(COLOR_MAP *table, const PALETTE pal, int r, g, b, void (*callback)(int pos)); DESCRIPTION Fills the specified color mapping table with lookup data for doing translu- cency effects with the specified palette. When combining the colors c1 and c2 with this table, the result will be a color somewhere between the two. The r, g, and b parameters specify the solidity of each color component, ranging from 0 (totally transparent) to 255 (totally solid). For 50% solid- ity, pass 128. This function treats source color #0 as a special case, leaving the desti- nation unchanged whenever a zero source pixel is encountered, so that masked sprites will draw correctly. This function will take advantage of the global rgb_map variable to speed up color conversions. If the callback function is not NULL, it will be called 256 times during the calculation, allowing you to display a progress indicator. Example: COLOR_MAP trans_table; ... /* Build a color lookup table for translucent drawing. */ create_trans_table(&trans_table, pal, 128, 128, 128, NULL); SEE ALSO color_map(3), create_light_table(3), create_color_table(3), cre- ate_blender_table(3), draw_trans_sprite(3), draw_lit_sprite(3), draw_gouraud_sprite(3), rgb_map(3), ex3d(3), extrans(3) Allegro version 4.4.3 create_trans_table(3)
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=create_trans_table&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>