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/*
* icon-gen.c - Zygaena marine-dark launcher icon generator.
*
* Renders three 48x48 ARGB launcher glyphs - terminal, files, editor - in
* the Hammerhead teal palette (matching wallpaper-gen.c). tint2 loads these
* by ABSOLUTE path (Icon=/usr/local/share/hammerhead-desktop/launcher/*.png),
* so no freedesktop icon theme / hicolor index.theme is required - which is
* exactly why the stock launcher was illegible (st shipped no icon, xnedit's
* png was loose, hicolor had no index.theme).
*
* Build: gcc icon-gen.c $(pkg-config --cflags --libs cairo) -lm -o ig
* Usage: ./ig /output/dir (writes terminal.png, files.png, editor.png,
* and preview.png for design review)
*/
#include <cairo.h>
#include <math.h>
#include <stdio.h>
#define S 48 /* icon canvas size */
/* palette - matches wallpaper-gen.c */
#define TILE_R 0x12/255.0
#define TILE_G 0x2e/255.0
#define TILE_B 0x34/255.0
#define TEAL_R 0x1f/255.0
#define TEAL_G 0xb6/255.0
#define TEAL_B 0xb6/255.0
#define TEALBR_R 0x54/255.0
#define TEALBR_G 0xe0/255.0
#define TEALBR_B 0xe0/255.0
#define TEXT_R 0xcf/255.0
#define TEXT_G 0xe0/255.0
#define TEXT_B 0xe0/255.0
static void
rrect(cairo_t *cr, double x, double y, double w, double h, double r)
{
cairo_new_sub_path(cr);
cairo_arc(cr, x + w - r, y + r, r, -M_PI / 2, 0);
cairo_arc(cr, x + w - r, y + h - r, r, 0, M_PI / 2);
cairo_arc(cr, x + r, y + h - r, r, M_PI / 2, M_PI);
cairo_arc(cr, x + r, y + r, r, M_PI, 3 * M_PI / 2);
cairo_close_path(cr);
}
/* subtle elevated chip so the three icons read as one branded set */
static void
tile(cairo_t *cr)
{
rrect(cr, 2.5, 2.5, S - 5, S - 5, 10);
cairo_set_source_rgb(cr, TILE_R, TILE_G, TILE_B);
cairo_fill_preserve(cr);
cairo_set_source_rgba(cr, TEAL_R, TEAL_G, TEAL_B, 0.40);
cairo_set_line_width(cr, 1.5);
cairo_stroke(cr);
}
/* Terminal: a prompt chevron ">" plus a cursor underscore "_". */
static void
draw_terminal(cairo_t *cr)
{
tile(cr);
cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
cairo_set_source_rgb(cr, TEALBR_R, TEALBR_G, TEALBR_B);
cairo_set_line_width(cr, 4.4);
cairo_move_to(cr, 15, 16);
cairo_line_to(cr, 25, 24);
cairo_line_to(cr, 15, 32);
cairo_stroke(cr);
cairo_set_source_rgb(cr, TEXT_R, TEXT_G, TEXT_B);
cairo_set_line_width(cr, 4.0);
cairo_move_to(cr, 27, 33);
cairo_line_to(cr, 34, 33);
cairo_stroke(cr);
}
/* Files: a two-tone manila folder (tab + body). */
static void
draw_files(cairo_t *cr)
{
tile(cr);
cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
/* tab peeking above the body's top-left */
cairo_set_source_rgb(cr, TEAL_R, TEAL_G, TEAL_B);
rrect(cr, 11, 14, 14, 8, 2.5);
cairo_fill(cr);
/* back body */
rrect(cr, 11, 18, 26, 17, 3);
cairo_fill(cr);
/* front pocket, lighter, slightly inset - gives the folder depth */
cairo_set_source_rgb(cr, TEALBR_R, TEALBR_G, TEALBR_B);
rrect(cr, 13, 23, 22, 12, 2.5);
cairo_fill(cr);
}
/* Editor: a pencil at 45 degrees (eraser, shaft, nib, tip). */
static void
draw_editor(cairo_t *cr)
{
tile(cr);
cairo_save(cr);
cairo_translate(cr, 24, 24);
cairo_rotate(cr, -M_PI / 4);
double pw = 8, half = pw / 2;
/* shaft */
cairo_set_source_rgb(cr, TEAL_R, TEAL_G, TEAL_B);
rrect(cr, -half, -13, pw, 19, 1.5);
cairo_fill(cr);
/* eraser (top) */
cairo_set_source_rgb(cr, TEXT_R, TEXT_G, TEXT_B);
rrect(cr, -half, -16.5, pw, 4, 1.2);
cairo_fill(cr);
/* nib (bottom), brighter teal */
cairo_set_source_rgb(cr, TEALBR_R, TEALBR_G, TEALBR_B);
cairo_move_to(cr, -half, 6);
cairo_line_to(cr, half, 6);
cairo_line_to(cr, 0, 14);
cairo_close_path(cr);
cairo_fill(cr);
/* graphite tip */
cairo_set_source_rgb(cr, TILE_R, TILE_G, TILE_B);
cairo_move_to(cr, -2.2, 10.5);
cairo_line_to(cr, 2.2, 10.5);
cairo_line_to(cr, 0, 14);
cairo_close_path(cr);
cairo_fill(cr);
cairo_restore(cr);
}
typedef void (*drawfn)(cairo_t *);
static void
emit(const char *dir, const char *name, drawfn fn)
{
char path[1024];
cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, S, S);
cairo_t *cr = cairo_create(s);
fn(cr);
snprintf(path, sizeof path, "%s/%s", dir, name);
cairo_surface_write_to_png(s, path);
printf("wrote %s\n", path);
cairo_destroy(cr);
cairo_surface_destroy(s);
}
/* Review sheet: each glyph at 3x (detail) over the same glyph at 22px
* (real launcher size) on a panel-tone strip, so legibility is judged at
* the size it will actually render. */
static void
emit_preview(const char *dir)
{
drawfn fns[3] = { draw_terminal, draw_files, draw_editor };
int cw = 160, W = cw * 3, H = 210;
char path[1024];
cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, W, H);
cairo_t *cr = cairo_create(s);
cairo_set_source_rgb(cr, 0x0d / 255.0, 0x11 / 255.0, 0x17 / 255.0);
cairo_paint(cr);
for (int i = 0; i < 3; i++) {
cairo_save(cr);
cairo_translate(cr, i * cw + (cw - 144) / 2.0, 8);
cairo_scale(cr, 144.0 / S, 144.0 / S);
fns[i](cr);
cairo_restore(cr);
}
/* panel strip */
cairo_set_source_rgb(cr, 0x0e / 255.0, 0x1c / 255.0, 0x1f / 255.0);
cairo_rectangle(cr, 0, 168, W, 42);
cairo_fill(cr);
for (int i = 0; i < 3; i++) {
cairo_save(cr);
cairo_translate(cr, i * cw + (cw - 22) / 2.0, 178);
cairo_scale(cr, 22.0 / S, 22.0 / S);
fns[i](cr);
cairo_restore(cr);
}
snprintf(path, sizeof path, "%s/preview.png", dir);
cairo_surface_write_to_png(s, path);
printf("wrote %s\n", path);
cairo_destroy(cr);
cairo_surface_destroy(s);
}
int
main(int argc, char **argv)
{
const char *dir = (argc > 1) ? argv[1] : ".";
emit(dir, "terminal.png", draw_terminal);
emit(dir, "files.png", draw_files);
emit(dir, "editor.png", draw_editor);
emit_preview(dir);
return 0;
}
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