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gen_image.c
459 lines (395 loc) · 12.7 KB
/
gen_image.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <cairo/cairo.h>
#include <pango/pango.h>
#include <pango/pangocairo.h>
/* colors */
static const float c_blk[4] = {0.0, 0.0, 0.0, 1.0};
static const float c_wht[4] = {1.0, 1.0, 1.0, 1.0};
static const float c_dlf[4] = {0.8, 0.8, 0.8, 1.0};
static const float c_ann[4] = {0.5, 0.5, 0.5, 1.0}; // text annotation color
/* filter parameters */
typedef struct {
float min;
float max;
float dflt;
float warp;
} FilterFreq;
/* frequency mapping */
static const FilterFreq freqs[] = {
/*min max dflt*/
{ 25, 400, 80, 16}, // LS
{ 20, 2000, 160, 100},
{ 40, 4000, 397, 100},
{ 100, 10000, 1250, 100},
{ 200, 20000, 2500, 100},
{1000, 16000, 8000, 16}, // HS
};
static const FilterFreq lphp[2] = {
{ 10, 1000, 20, 100}, // HP
{ 630, 20000, 20000, 32}, // LP
};
static const double GED_CX = 47;
static const double GED_CY = 43.5;
static const double GED_RADIUS = 28;
static const double GED_WIDTH = 93;
static const double GZLINE = 75 - 10;
static const double SF_W = 93;
static const double SF_H = 85;
static float dial_to_freq (const FilterFreq *m, float f) {
return m->min + (m->max - m->min) * (pow((1. + m->warp), f) - 1.) / m->warp;
}
static float bw_to_dial (float v) {
if (v < .0625) return 0.f;
if (v > 4.0) return 1.f;
return log2f (16.f * v) / 6.f;
}
static float hplp_to_dial (const float v) {
#if 1
float rv = 0.525561 - 0.387896 * atan(4.5601 - 5.2275 * v);
if (rv < 0) return 0;
if (rv > 1.0) return 1.0;
return rv;
#else
return v / 1.4;
#endif
}
static void print_hz (char *t, float hz) {
//printf("%f ", hz);
hz = 5 * rintf(hz / 5.f);
if (hz >= 990) {
int dec = ((int)rintf (hz / 100.f)) % 10;
if (dec != 0) {
snprintf(t, 8, "%.0fK%d", floor(hz / 1000.f), dec);
} else {
snprintf(t, 8, "%.0fK", hz / 1000.f);
}
} else {
snprintf(t, 8, "%.0f", hz);
}
//printf("-> %f -> %s\n", hz, t);
}
static void write_text_full (
cairo_t* cr,
const char *txt,
PangoFontDescription *font,
const float x, const float y,
const float ang, const int align,
const float * const col) {
int tw, th;
cairo_save(cr);
PangoLayout * pl = pango_cairo_create_layout(cr);
pango_layout_set_font_description(pl, font);
if (strncmp(txt, "<markup>", 8)) {
pango_layout_set_text(pl, txt, -1);
} else {
pango_layout_set_markup(pl, txt, -1);
}
pango_layout_get_pixel_size(pl, &tw, &th);
cairo_translate (cr, rintf(x), rintf(y));
if (ang != 0) { cairo_rotate (cr, ang); }
switch(abs(align)) {
case 1:
cairo_translate (cr, -tw, ceil(th/-2.0));
pango_layout_set_alignment (pl, PANGO_ALIGN_RIGHT);
break;
case 2:
cairo_translate (cr, ceil(tw/-2.0), ceil(th/-2.0));
pango_layout_set_alignment (pl, PANGO_ALIGN_CENTER);
break;
case 3:
cairo_translate (cr, 0, ceil(th/-2.0));
pango_layout_set_alignment (pl, PANGO_ALIGN_LEFT);
break;
case 4:
cairo_translate (cr, -tw, -th);
pango_layout_set_alignment (pl, PANGO_ALIGN_RIGHT);
break;
case 5:
cairo_translate (cr, ceil(tw/-2.0), -th);
pango_layout_set_alignment (pl, PANGO_ALIGN_CENTER);
break;
case 6:
cairo_translate (cr, 0, -th);
pango_layout_set_alignment (pl, PANGO_ALIGN_LEFT);
break;
case 7:
cairo_translate (cr, -tw, 0);
pango_layout_set_alignment (pl, PANGO_ALIGN_RIGHT);
break;
case 8:
cairo_translate (cr, ceil(tw/-2.0), 0);
pango_layout_set_alignment (pl, PANGO_ALIGN_CENTER);
break;
case 9:
cairo_translate (cr, 0, 0);
pango_layout_set_alignment (pl, PANGO_ALIGN_LEFT);
break;
default:
break;
}
if (align < 0) {
cairo_set_source_rgba (cr, .0, .0, .0, .5);
cairo_rectangle (cr, 0, 0, tw, th);
cairo_fill (cr);
}
#if 1
cairo_set_source_rgba (cr, col[0], col[1], col[2], col[3]);
pango_cairo_show_layout(cr, pl);
#else
cairo_set_source_rgba (cr, col[0], col[1], col[2], col[3]);
pango_cairo_layout_path(cr, pl);
cairo_fill(cr);
#endif
g_object_unref(pl);
cairo_restore(cr);
cairo_new_path (cr);
}
#define CairoSetSouerceRGBA(COL) \
cairo_set_source_rgba (cr, (COL)[0], (COL)[1], (COL)[2], (COL)[3])
#define DIALDOTS(V, XADD, YADD) \
float ang = (-.75 * M_PI) + (1.5 * M_PI) * (V); \
xlp = GED_CX + XADD + sinf (ang) * (GED_RADIUS); \
ylp = GED_CY + YADD - cosf (ang) * (GED_RADIUS); \
cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND); \
CairoSetSouerceRGBA(c_dlf); \
cairo_set_line_width(cr, 2.5); \
cairo_move_to(cr, rint(xlp)-.5, rint(ylp)-.5); \
cairo_close_path(cr); \
cairo_stroke(cr);
#define RESPLABLEL(V) \
{ \
DIALDOTS(V, 0, 0) \
xlp = GED_CX + sinf (ang) * (GED_RADIUS + 6.5); \
ylp = GED_CY - cosf (ang) * (GED_RADIUS + 6.5); \
}
static void gain_knob (cairo_t* cr)
{
float xlp, ylp;
PangoFontDescription* font = pango_font_description_from_string("Mono 9px");
RESPLABLEL(0.00);
write_text_full(cr, "-18", font, xlp, ylp, 0, 1, c_dlf);
RESPLABLEL(.16);
write_text_full(cr, "-12", font, xlp, ylp, 0, 1, c_dlf);
RESPLABLEL(.33);
write_text_full(cr, "-6", font, xlp, ylp, 0, 1, c_dlf);
RESPLABLEL(0.5);
write_text_full(cr, "0dB", font, xlp-1, ylp-1, 0, 2, c_dlf);
RESPLABLEL(.66);
write_text_full(cr, "+6", font, xlp-3, ylp, 0, 3, c_dlf);
RESPLABLEL(.83);
write_text_full(cr, "+12", font, xlp-3, ylp, 0, 3, c_dlf);
RESPLABLEL(1.0);
write_text_full(cr, "+18", font, xlp-3, ylp, 0, 3, c_dlf);
pango_font_description_free (font);
}
#define BWX 10
static void bw_knob (cairo_t* cr)
{
const double GED_CY = 33.5;
float xlp, ylp;
CairoSetSouerceRGBA(c_dlf);
cairo_set_line_width(cr, 1.25);
cairo_move_to (cr, 1 + BWX, GZLINE);
cairo_line_to (cr, 8 + BWX, GZLINE);
cairo_line_to (cr, 10 + BWX, GZLINE - 4);
cairo_line_to (cr, 12 + BWX, GZLINE);
cairo_line_to (cr, 19 + BWX, GZLINE);
cairo_move_to (cr, 12 + BWX, GZLINE);
cairo_line_to (cr, 10 + BWX, GZLINE + 4);
cairo_line_to (cr, 8 + BWX, GZLINE);
cairo_stroke (cr);
cairo_move_to (cr, GED_WIDTH - BWX - 1, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 4, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 10, GZLINE - 4);
cairo_line_to (cr, GED_WIDTH - BWX - 16, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 19, GZLINE);
cairo_move_to (cr, GED_WIDTH - BWX - 16, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 10, GZLINE + 4);
cairo_line_to (cr, GED_WIDTH - BWX - 4, GZLINE);
cairo_stroke (cr);
{ DIALDOTS(bw_to_dial (powf(2.f, 4 / 2.f)), .0, .5) }
{ DIALDOTS(bw_to_dial (powf(2.f, 2 / 2.f)), .0, .5) }
{ DIALDOTS(bw_to_dial (powf(2.f, 0 / 2.f)), .0, .5) }
{ DIALDOTS(bw_to_dial (powf(2.f, -2 / 2.f)), .0, .5) }
{ DIALDOTS(bw_to_dial (powf(2.f, -4 / 2.f)), .0, .5) }
{ DIALDOTS(bw_to_dial (powf(2.f, -6 / 2.f)), .0, .5) }
{ DIALDOTS(bw_to_dial (powf(2.f, -8 / 2.f)), .0, .5) }
}
static void bw_ls_knob (cairo_t* cr)
{
const double GED_CY = 33.5;
float xlp, ylp;
CairoSetSouerceRGBA(c_dlf);
cairo_set_line_width(cr, 1.25);
cairo_move_to (cr, 1 + BWX, GZLINE - 3);
cairo_line_to (cr, 4 + BWX, GZLINE - 3);
cairo_line_to (cr, 14 + BWX, GZLINE);
cairo_line_to (cr, 18 + BWX, GZLINE);
cairo_move_to (cr, 14 + BWX, GZLINE);
cairo_line_to (cr, 4 + BWX, GZLINE + 3);
cairo_line_to (cr, 1 + BWX, GZLINE + 3);
cairo_stroke (cr);
cairo_move_to (cr, GED_WIDTH - BWX - 1, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 7, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 10, GZLINE - 3);
cairo_line_to (cr, GED_WIDTH - BWX - 18, GZLINE - 3);
cairo_move_to (cr, GED_WIDTH - BWX - 7, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 10, GZLINE + 3);
cairo_line_to (cr, GED_WIDTH - BWX - 18, GZLINE + 3);
cairo_stroke (cr);
CairoSetSouerceRGBA(c_ann);
cairo_set_line_width (cr, 1.0);
cairo_arc (cr, GED_CX + 0, GED_CY, GED_RADIUS + 2.0, -.25 * M_PI, .25 * M_PI);
cairo_stroke (cr);
cairo_arc (cr, GED_CX - 1, GED_CY, GED_RADIUS + 2.0, 0.75 * M_PI, 1.25 * M_PI);
cairo_stroke (cr);
CairoSetSouerceRGBA(c_dlf);
{ DIALDOTS( 0.0, .0, .5) }
{ DIALDOTS(1/6.f, .0, .5) }
{ DIALDOTS(2/6.f, .0, .5) }
{ DIALDOTS(3/6.f, .0, .5) }
{ DIALDOTS(4/6.f, .0, .5) }
{ DIALDOTS(5/6.f, .0, .5) }
{ DIALDOTS( 1.0, .0, .5) }
}
static void bw_hs_knob (cairo_t* cr)
{
const double GED_CY = 33.5;
float xlp, ylp;
CairoSetSouerceRGBA(c_dlf);
cairo_set_line_width(cr, 1.25);
cairo_move_to (cr, 18 + BWX, GZLINE - 3);
cairo_line_to (cr, 15 + BWX, GZLINE - 3);
cairo_line_to (cr, 5 + BWX, GZLINE);
cairo_line_to (cr, 1 + BWX, GZLINE);
cairo_move_to (cr, 5 + BWX, GZLINE);
cairo_line_to (cr, 15 + BWX, GZLINE + 3);
cairo_line_to (cr, 18 + BWX, GZLINE + 3);
cairo_stroke (cr);
cairo_move_to (cr, GED_WIDTH - BWX - 18, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 12, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 8, GZLINE - 3);
cairo_line_to (cr, GED_WIDTH - BWX - 1, GZLINE - 3);
cairo_move_to (cr, GED_WIDTH - BWX - 12, GZLINE);
cairo_line_to (cr, GED_WIDTH - BWX - 9, GZLINE + 3);
cairo_line_to (cr, GED_WIDTH - BWX - 1, GZLINE + 3);
cairo_stroke (cr);
CairoSetSouerceRGBA(c_ann);
cairo_set_line_width (cr, 1.0);
cairo_arc (cr, GED_CX + 0, GED_CY, GED_RADIUS + 2.0, -.25 * M_PI, .25 * M_PI);
cairo_stroke (cr);
cairo_arc (cr, GED_CX - 1, GED_CY, GED_RADIUS + 2.0, 0.75 * M_PI, 1.25 * M_PI);
cairo_stroke (cr);
CairoSetSouerceRGBA(c_dlf);
{ DIALDOTS( 0.0, .0, .5) }
{ DIALDOTS(1/6.f, .0, .5) }
{ DIALDOTS(2/6.f, .0, .5) }
{ DIALDOTS(3/6.f, .0, .5) }
{ DIALDOTS(4/6.f, .0, .5) }
{ DIALDOTS(5/6.f, .0, .5) }
{ DIALDOTS( 1.0, .0, .5) }
}
#define HLX 3 // Hi/Low pass icon x-offset
static void bw_lp_knob (cairo_t* cr)
{
float xlp, ylp;
CairoSetSouerceRGBA(c_dlf);
cairo_set_line_width(cr, 1.25);
cairo_move_to (cr, 1 + HLX, GZLINE - 1);
cairo_line_to (cr, 6 + HLX, GZLINE - 1);
cairo_curve_to (cr, 8 + HLX, GZLINE - 1, 18 + HLX, GZLINE - 0, 18 + HLX, GZLINE + 3);
cairo_stroke (cr);
cairo_move_to (cr, GED_WIDTH - HLX - 18, GZLINE - 1);
cairo_line_to (cr, GED_WIDTH - HLX - 12, GZLINE - 1);
cairo_line_to (cr, GED_WIDTH - HLX - 8, GZLINE - 3);
cairo_line_to (cr, GED_WIDTH - HLX - 1, GZLINE + 3);
cairo_stroke (cr);
{ DIALDOTS( 0.0, .0, .5) }
{ DIALDOTS(hplp_to_dial(.71), .0, .5) }
{ DIALDOTS( 0.5, .0, .5) }
{ DIALDOTS(hplp_to_dial(1.0), .0, .5) }
{ DIALDOTS( 1.0, .0, .5) }
}
static void bw_hp_knob (cairo_t* cr)
{
float xlp, ylp;
CairoSetSouerceRGBA(c_dlf);
cairo_set_line_width(cr, 1.25);
cairo_move_to (cr, 1 + HLX, GZLINE + 3);
cairo_curve_to (cr, 1 + HLX, GZLINE - 0, 11 + HLX, GZLINE - 1, 13 + HLX, GZLINE - 1);
cairo_line_to (cr, 18 + HLX, GZLINE - 1);
cairo_stroke (cr);
cairo_move_to (cr, GED_WIDTH - HLX - 18, GZLINE + 3);
cairo_line_to (cr, GED_WIDTH - HLX - 12, GZLINE - 3);
cairo_line_to (cr, GED_WIDTH - HLX - 8, GZLINE - 1);
cairo_line_to (cr, GED_WIDTH - HLX - 1, GZLINE - 1);
cairo_stroke (cr);
{ DIALDOTS( 0.0, .0, .5) }
{ DIALDOTS(hplp_to_dial(.71), .0, .5) }
{ DIALDOTS( 0.5, .0, .5) }
{ DIALDOTS(hplp_to_dial(1.0), .0, .5) }
{ DIALDOTS( 1.0, .0, .5) }
}
static void freq_knob (cairo_t* cr, FilterFreq const * const f)
{
float xlp, ylp;
char tfq[8];
PangoFontDescription* font = pango_font_description_from_string("Mono 9px");
print_hz(tfq, dial_to_freq(f, 0));
RESPLABLEL(0.00); write_text_full(cr, tfq, font, xlp, ylp, 0, 1, c_dlf);
print_hz(tfq, dial_to_freq(f, .25));
RESPLABLEL(0.25); write_text_full(cr, tfq, font, xlp, ylp, 0, 1, c_dlf);
print_hz(tfq, dial_to_freq(f, .50));
RESPLABLEL(0.50); write_text_full(cr, tfq, font, xlp, ylp, 0, 2, c_dlf);
print_hz(tfq, dial_to_freq(f, .75));
RESPLABLEL(0.75); write_text_full(cr, tfq, font, xlp-2, ylp, 0, 3, c_dlf);
print_hz(tfq, dial_to_freq(f, 1.0));
RESPLABLEL(1.00); write_text_full(cr, tfq, font, xlp-2, ylp, 0, 3, c_dlf);
pango_font_description_free (font);
}
#define SF_NEW(W,H) \
cs = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, W, H); \
cr = cairo_create(cs);
#define SF_END(NAME) \
cairo_surface_write_to_png(cs, NAME); \
cairo_destroy (cr); \
cairo_surface_destroy (cs);
int main(int argc, char **argv) {
cairo_surface_t* cs;
cairo_t* cr;
SF_NEW (SF_W, SF_H);
gain_knob (cr);
SF_END ("../modgui/x42-eq-gain.png");
SF_NEW (SF_W, SF_H - 10);
bw_knob (cr);
SF_END ("../modgui/x42-eq-bw.png");
SF_NEW (SF_W, SF_H - 10);
bw_hs_knob (cr);
SF_END ("../modgui/x42-eq-bwhs.png");
SF_NEW (SF_W, SF_H - 10);
bw_ls_knob (cr);
SF_END ("../modgui/x42-eq-bwls.png");
SF_NEW (SF_W, SF_H);
bw_lp_knob (cr);
SF_END ("../modgui/x42-eq-bwlp.png");
SF_NEW (SF_W, SF_H);
bw_hp_knob (cr);
SF_END ("../modgui/x42-eq-bwhp.png");
for (int i = 0; i < 6; ++i) {
char name[64];
sprintf(name, "../modgui/x42-eq-f%d.png",i);
SF_NEW (SF_W, SF_H);
freq_knob (cr, &freqs[i]);
SF_END (name);
}
SF_NEW (SF_W, SF_H);
freq_knob (cr, &lphp[0]);
SF_END ("../modgui/x42-eq-fh.png");
SF_NEW (SF_W, SF_H);
freq_knob (cr, &lphp[1]);
SF_END ("../modgui/x42-eq-fl.png");
return 0;
}