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

       exrgbhsv - RGB <-> HSV color space conversions. Allegro game programming

       #include <allegro.h>

       Example exrgbhsv

       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.

       BITMAP(3alleg4), DIALOG(3alleg4), END_OF_MAIN(3alleg4), PALETTE(3alleg4),
       RGB(3alleg4), RGB_MAP(3alleg4), allegro_error(3alleg4),
       allegro_init(3alleg4), allegro_message(3alleg4), clear_to_color(3alleg4),
       create_bitmap_ex(3alleg4), create_rgb_table(3alleg4),
       d_bitmap_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_message(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 4.4.3                exrgbhsv(3alleg4)