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exrgbhsv(3alleg4) [centos man page]

exrgbhsv(3alleg4)						  Allegro manual						 exrgbhsv(3alleg4)

NAME
exrgbhsv - RGB <-> HSV color space conversions. Allegro game programming library. SYNOPSIS
#include <allegro.h> Example exrgbhsv DESCRIPTION
This program shows how to convert colors between the different color-space representations. The central area of the screen will display the current color. On the top left corner of the screen, three sliders allow you to modify the red, green and blue value of the color. On the bottom right corner of the screen, three sliders allow you to modify the hue, saturation and value of the color. The color bars beneath the sliders show what the resulting color will look like when the slider is dragged to that position. Additionally this example also shows how to "inherit" the behaviour of a GUI object and extend it, here used to create the sliders. SEE ALSO
BITMAP(3alleg4), DIALOG(3alleg4), END_OF_MAIN(3alleg4), PALETTE(3alleg4), RGB(3alleg4), RGB_MAP(3alleg4), allegro_error(3alleg4), alle- gro_init(3alleg4), allegro_message(3alleg4), clear_to_color(3alleg4), create_bitmap_ex(3alleg4), create_rgb_table(3alleg4), d_bit- map_proc(3alleg4), d_box_proc(3alleg4), d_slider_proc(3alleg4), d_text_proc(3alleg4), destroy_bitmap(3alleg4), do_dialog(3alleg4), font(3alleg4), generate_332_palette(3alleg4), get_color_depth(3alleg4), hsv_to_rgb(3alleg4), install_keyboard(3alleg4), install_mouse(3alleg4), install_timer(3alleg4), key(3alleg4), makecol(3alleg4), makecol32(3alleg4), makecol8(3alleg4), object_mes- sage(3alleg4), rgb_map(3alleg4), rgb_to_hsv(3alleg4), screen(3alleg4), set_color(3alleg4), set_color_depth(3alleg4), set_gfx_mode(3alleg4), set_palette(3alleg4), textout_ex(3alleg4), vline(3alleg4), vsync(3alleg4) Allegro version 4.4.2 exrgbhsv(3alleg4)

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extrans(3alleg4)						  Allegro manual						  extrans(3alleg4)

NAME
extrans - Lighting and translucency effects. Allegro game programming library. SYNOPSIS
#include <allegro.h> Example extrans DESCRIPTION
This program demonstrates how to use the lighting and translucency functions. The first part of the example will show a dark screen illumi- nated by a spotlight you can move with your mouse. After a key press the example shows the full bitmap and the spotlight changes to be a reduced version of the background with 50% of translucency. The translucency effect is easy to do in all color depths. However, the lighting effect has to be performed in a different way depending on whether the screen is in 8bit mode or another color depth. This is because additive drawing mode uses a different set of routines for truecolor modes. SEE ALSO
BITMAP(3alleg4), COLOR_MAP(3alleg4), END_OF_MAIN(3alleg4), PALETTE(3alleg4), RGB(3alleg4), RGB_MAP(3alleg4), SCREEN_H(3alleg4), SCREEN_W(3alleg4), allegro_error(3alleg4), allegro_init(3alleg4), allegro_message(3alleg4), bitmap_color_depth(3alleg4), blit(3alleg4), circlefill(3alleg4), clear_bitmap(3alleg4), clear_keybuf(3alleg4), color_map(3alleg4), create_bitmap(3alleg4), create_bitmap_ex(3alleg4), create_light_table(3alleg4), create_rgb_table(3alleg4), create_trans_table(3alleg4), destroy_bitmap(3alleg4), draw_trans_sprite(3alleg4), drawing_mode(3alleg4), install_keyboard(3alleg4), install_mouse(3alleg4), install_timer(3alleg4), keypressed(3alleg4), load_bit- map(3alleg4), mouse_x(3alleg4), mouse_y(3alleg4), poll_mouse(3alleg4), rectfill(3alleg4), replace_filename(3alleg4), rest(3alleg4), rgb_map(3alleg4), screen(3alleg4), set_alpha_blender(3alleg4), set_gfx_mode(3alleg4), set_palette(3alleg4), set_trans_blender(3alleg4), set_write_alpha_blender(3alleg4), stretch_blit(3alleg4) Allegro version 4.4.2 extrans(3alleg4)
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