Zach's git repos / ccharter-c
efficient program to spit out SVG for guitar/uke chord frett diagram
SVG: draw dots where your fingers should go
Browse Source
Zach DeCook 2020-12-26
parent 7ab3bc0 · commit eece740
Diffstat
-rw-r--r--ccharter.c60
1 files changed, 27 insertions, 33 deletions
diff --git a/ccharter.c b/ccharter.c
index bb4c786..f475a27 100644
--- a/ccharter.c
+++ b/ccharter.c
@@ -1,10 +1,13 @@
#include <stdio.h>
#include <string.h>
+#include <stdbool.h>
+#define WIDTH 50
+#define HEIGHT 60
int main(int argc, char **argv) {
- printf("<svg width=\"60px\" height=\"75px\" "
+ printf("<svg width=\"65px\" height=\"75px\" "
"version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" overflow=\"visible\" "
"style=\"stroke-width:2; stroke:black;\" "
- "viewBox=\"-5 -15 50 75\" "
+ "viewBox=\"-5 -15 55 75\" "
">"
);
int fretsCount = strlen(argv[1]);
@@ -15,7 +18,7 @@ int main(int argc, char **argv) {
// horizontals
int i;
for (i = 0; i <= 4; i++) {
- printf("<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" />",
+ printf("<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" />\n",
0 - 1, (i * 60/4),
0+50+1, (i * 60/4)
);
@@ -23,30 +26,30 @@ int main(int argc, char **argv) {
// verts
for ( i = 0; i < fretsCount; i++ ) {
- printf("<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" />",
+ printf("<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" />\n",
0 + (i * 50 / (fretsCount - 1)), 0,
0 + (i * 50 / (fretsCount - 1)), 0 + 60
);
}
// label
- printf("<text x=\"%d\" y=\"%d\" style=\"stroke-width:0; text-anchor:middle;\">%s</text>",
+ printf("<text x=\"%d\" y=\"%d\" style=\"stroke-width:0; text-anchor:middle;\">%s</text>\n",
0 + 50/2, 0 - 5, argv[2]
);
// If any dots are after 4, adjust the root to be the lowest non-zero fret
// If the root is zero , thicken the top fret
- /*var baseFret = 0;
- var adjBaseFret = false;
- var lowestFret = 0;
-
- for (j=0; j < chord.frets.length; j++) {
- if (chord.frets.charAt(j) != 'x' && chord.frets.charAt(j) != 'X' && chord.frets.charAt(j) > 0) {
- if (chord.frets.charAt(j) < lowestFret || lowestFret == 0) {
- lowestFret = chord.frets.charAt(j);
+ int baseFret = 0;
+ bool adjBaseFret = false;
+ int lowestFret = 0;
+ int j;
+ for (j=0; j < strlen(argv[1]); j++) {
+ if (argv[1][j] > '0' && argv[1][j] <= '9') {
+ if (argv[1][j] - '0' < lowestFret || lowestFret == 0) {
+ lowestFret = argv[1][j] - '0';
}
- if (chord.frets.charAt(j) > 4) {
+ if (argv[1][j] > '4') {
adjBaseFret = true;
}
}
@@ -58,32 +61,23 @@ int main(int argc, char **argv) {
// dots
- var dotsize = 3.5;
-
- var i = 0;
-
- for (j=0; j < chord.frets.length; j++) {
-
- ctx.alignText = "left";
- ctx.fillText(chord.frets.charAt(j), origin.x + (i * props.width / (fretsCount - 1)), origin.y + props.height + 12);
+ for (j=0; j < fretsCount; j++) {
- if (chord.frets.charAt(j) == 0) {
-
-
- } else if (chord.frets.charAt(j) == 'x' || chord.frets.charAt(j) == 'X') {
-
- } else {
- ctx.beginPath();
- ctx.arc(origin.x + (i * props.width / (fretsCount -1)), origin.y - 7.5 + (15 * (chord.frets.charAt(j) - baseFret)), dotsize, 0, Math.PI*2,true);
- ctx.closePath();
- ctx.fill();
+ // TODO: Write the O or X if it is open or muted.
+ //ctx.alignText = "left";
+ //ctx.fillText(chord.frets.charAt(j), origin.x + (i * props.width / (fretsCount - 1)), origin.y + props.height + 12);
+
+ if (argv[1][j] > '0' && argv[1][j] <= '9') {
+ printf("<circle cx=\"%d\" cy=\"%d\" r=\"3\"/>\n",
+ (j * WIDTH) / (fretsCount - 1), (HEIGHT/4) * (argv[1][j] - '0') - baseFret - 7
+ );
}
i++;
}
// base fret indicator
- if (baseFret > 0) {
+ /*if (baseFret > 0) {
ctx.alignText = "left";
ctx.fillText(baseFret + 1, origin.x - 10, origin.y + 11);
} else {