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/*
* Example program for the Allegro library, by Elias Pschernig.
*
* Demonstrates some of the conversion functions in the color addon.
*/
#include <string>
#include <cstdio>
#include "allegro5/allegro.h"
#include "allegro5/allegro_ttf.h"
#include "allegro5/allegro_color.h"
#include <allegro5/allegro_primitives.h>
#include "nihgui.hpp"
#include "common.c"
#define SLIDERS_COUNT 19
char const *names[] = {"R", "G", "B", "H", "S", "V", "H", "S", "L",
"Y", "U", "V", "C", "M", "Y", "K", "L", "C", "H"};
float clamp(float x)
{
if (x < 0)
return 0;
if (x > 1)
return 1;
return x;
}
class Prog {
private:
Dialog d;
VSlider sliders[SLIDERS_COUNT];
Label labels[SLIDERS_COUNT];
Label labels2[SLIDERS_COUNT];
int previous[SLIDERS_COUNT];
public:
Prog(const Theme & theme, ALLEGRO_DISPLAY *display);
void run();
private:
void draw_swatch(float x, float y, float w, float h, float v[3]);
};
Prog::Prog(const Theme & theme, ALLEGRO_DISPLAY *display) :
d(Dialog(theme, display, 640, 480))
{
for (int i = 0; i < SLIDERS_COUNT; i++) {
int j = i < 12 ? i / 3 : i < 16 ? 4 : 5;
sliders[i] = VSlider(1000, 1000);
d.add(sliders[i], 8 + i * 32 + j * 16, 8, 15, 256);
labels[i].set_text(names[i]);
d.add(labels[i], i * 32 + j * 16, 8 + 256, 32, 20);
d.add(labels2[i], i * 32 + j * 16, 8 + 276, 32, 20);
previous[i] = 0;
}
}
void Prog::run()
{
d.prepare();
while (!d.is_quit_requested()) {
if (d.is_draw_requested()) {
al_clear_to_color(al_map_rgb(128, 128, 128));
float v[SLIDERS_COUNT];
int keep = -1;
for (int i = 0; i < SLIDERS_COUNT; i++) {
int x = sliders[i].get_cur_value();
v[i] = x / 1000.0;
if (previous[i] != x) {
keep = i;
}
}
if (keep != -1) {
int space = keep < 12 ? keep / 3 : keep < 16 ? 4 : 5;
switch (space) {
case 0:
al_color_rgb_to_hsv(v[0], v[1], v[2], v + 3, v + 4, v + 5);
al_color_rgb_to_hsl(v[0], v[1], v[2], v + 6, v + 7, v + 8);
al_color_rgb_to_cmyk(v[0], v[1], v[2], v + 12, v + 13, v + 14, v + 15);
al_color_rgb_to_yuv(v[0], v[1], v[2], v + 9, v + 10, v + 11);
al_color_rgb_to_lch(v[0], v[1], v[2], v + 16, v + 17, v + 18);
v[3] /= 360;
v[6] /= 360;
v[18] /= ALLEGRO_PI * 2;
break;
case 1:
al_color_hsv_to_rgb(v[3] * 360, v[4], v[5], v + 0, v + 1, v + 2);
al_color_rgb_to_hsl(v[0], v[1], v[2], v + 6, v + 7, v + 8);
al_color_rgb_to_cmyk(v[0], v[1], v[2], v + 12, v + 13, v + 14, v + 15);
al_color_rgb_to_yuv(v[0], v[1], v[2], v + 9, v + 10, v + 11);
al_color_rgb_to_lch(v[0], v[1], v[2], v + 16, v + 17, v + 18);
v[6] /= 360;
v[18] /= ALLEGRO_PI * 2;
break;
case 2:
al_color_hsl_to_rgb(v[6] * 360, v[7], v[8], v + 0, v + 1, v + 2);
al_color_rgb_to_hsv(v[0], v[1], v[2], v + 3, v + 4, v + 5);
al_color_rgb_to_cmyk(v[0], v[1], v[2], v + 12, v + 13, v + 14, v + 15);
al_color_rgb_to_yuv(v[0], v[1], v[2], v + 9, v + 10, v + 11);
al_color_rgb_to_lch(v[0], v[1], v[2], v + 16, v + 17, v + 18);
v[3] /= 360;
v[18] /= ALLEGRO_PI * 2;
break;
case 3:
al_color_yuv_to_rgb(v[9], v[10], v[11], v + 0, v + 1, v + 2);
v[0] = clamp(v[0]);
v[1] = clamp(v[1]);
v[2] = clamp(v[2]);
al_color_rgb_to_yuv(v[0], v[1], v[2], v + 9, v + 10, v + 11);
al_color_rgb_to_hsv(v[0], v[1], v[2], v + 3, v + 4, v + 5);
al_color_rgb_to_hsl(v[0], v[1], v[2], v + 6, v + 7, v + 8);
al_color_rgb_to_cmyk(v[0], v[1], v[2], v + 12, v + 13, v + 14, v + 15);
al_color_rgb_to_lch(v[0], v[1], v[2], v + 16, v + 17, v + 18);
v[3] /= 360;
v[6] /= 360;
v[18] /= ALLEGRO_PI * 2;
break;
case 4:
al_color_cmyk_to_rgb(v[12], v[13], v[14], v[15], v + 0, v + 1, v + 2);
al_color_rgb_to_hsv(v[0], v[1], v[2], v + 3, v + 4, v + 5);
al_color_rgb_to_hsl(v[0], v[1], v[2], v + 6, v + 7, v + 8);
al_color_rgb_to_yuv(v[0], v[1], v[2], v + 9, v + 10, v + 11);
al_color_rgb_to_lch(v[0], v[1], v[2], v + 16, v + 17, v + 18);
v[3] /= 360;
v[6] /= 360;
v[18] /= ALLEGRO_PI * 2;
break;
case 5:
al_color_lch_to_rgb(v[16], v[17], v[18] * 2 * ALLEGRO_PI, v + 0, v + 1, v + 2);
v[0] = clamp(v[0]);
v[1] = clamp(v[1]);
v[2] = clamp(v[2]);
al_color_rgb_to_hsv(v[0], v[1], v[2], v + 3, v + 4, v + 5);
al_color_rgb_to_hsl(v[0], v[1], v[2], v + 6, v + 7, v + 8);
al_color_rgb_to_yuv(v[0], v[1], v[2], v + 9, v + 10, v + 11);
al_color_rgb_to_lch(v[0], v[1], v[2], v + 16, v + 17, v + 18);
v[3] /= 360;
v[6] /= 360;
v[18] /= ALLEGRO_PI * 2;
break;
}
}
for (int i = 0; i < SLIDERS_COUNT; i++) {
sliders[i].set_cur_value((int)(v[i] * 1000));
previous[i] = sliders[i].get_cur_value();
char c[100];
sprintf(c, "%d", (int)(v[i] * 100));
labels2[i].set_text(c);
}
d.draw();
ALLEGRO_BITMAP *target = al_get_target_bitmap();
int w = al_get_bitmap_width(target);
int h = al_get_bitmap_height(target);
draw_swatch(0, h - 80, w, h, v);
al_flip_display();
}
d.run_step(true);
}
}
void Prog::draw_swatch(float x1, float y1, float x2, float y2, float v[3])
{
al_draw_filled_rectangle(x1, y1, x2, y2, al_map_rgb_f(v[0], v[1], v[2]));
char const *name = al_color_rgb_to_name(v[0], v[1], v[2]);
char html[8];
al_color_rgb_to_html(v[0], v[1], v[2], html);
al_draw_text(d.get_theme().font, al_map_rgb(0, 0, 0), x1, y1 - 20, 0, name);
al_draw_text(d.get_theme().font, al_map_rgb(0, 0, 0), x1, y1 - 40, 0, html);
}
int main(int argc, char *argv[])
{
ALLEGRO_DISPLAY *display;
ALLEGRO_FONT *font;
(void)argc;
(void)argv;
if (!al_init()) {
abort_example("Could not init Allegro\n");
}
al_init_primitives_addon();
al_install_keyboard();
al_install_mouse();
al_init_font_addon();
al_init_ttf_addon();
init_platform_specific();
al_set_new_display_flags(ALLEGRO_GENERATE_EXPOSE_EVENTS);
display = al_create_display(720, 480);
if (!display) {
abort_example("Unable to create display\n");
}
font = al_load_font("data/DejaVuSans.ttf", 12, 0);
if (!font) {
abort_example("Failed to load data/DejaVuSans.ttf\n");
}
/* Prog is destroyed at the end of this scope. */
{
Theme theme(font);
Prog prog(theme, display);
prog.run();
}
al_destroy_font(font);
return 0;
}
/* vim: set sts=3 sw=3 et: */
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