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core/tools: implement "pixel-perfect" mode for dialog-designer tool

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Pavol Rusnak 2020-06-05 14:11:19 +00:00
parent 5262ef84cf
commit 2815b62838
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GPG Key ID: 91F3B339B9A02A3D
1 changed files with 45 additions and 2 deletions
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47
core/tools/dialog-designer/script.js
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@ -4,22 +4,65 @@ img_confirm.src = "screen-confirm.png";
var img_yesno = new Image();
img_yesno.src = "screen-yes-no.png";
var pixelPerfect = true;
function ppMeasureWidth(ctx, text) {
if (!pixelPerfect) {
return ctx.measureText(text).width;
} else {
var w = 0;
for (var i = 0; i < text.length; i++) {
var c = text.charCodeAt(i);
if (c >= 32 && c < 127) {
w += ctx.fontAdvances[c - 32];
} else {
w += 12; // sane default for unsupported Unicode chars
}
}
return w;
}
}
function ppFillText(ctx, text, x, y) {
if (!pixelPerfect) {
ctx.fillText(text, x, y);
} else {
for (var i = 0; i < text.length; i++) {
var c = text[i];
ctx.fillText(c, x, y);
x += ppMeasureWidth(ctx, c);
}
}
}
function setFont(ctx, bold, mono) {
ctx.fillStyle = 'white';
var font = bold ? 'bold ' : '';
font += '20px "Roboto';
font += mono ? ' Mono"' : '"';
ctx.font = font;
if (mono) {
// advance is always 12px for Roboto Mono
ctx.fontAdvances = Array(126 - 32 + 1).fill(12);
} else {
if (bold) {
// advances taken from font_roboto_bold_20.c (column 3)
ctx.fontAdvances = [5, 5, 7, 13, 12, 15, 14, 4, 7, 8, 9, 12, 6, 8, 5, 8, 12, 11, 12, 12, 11, 12, 12, 12, 12, 12, 5, 5, 11, 11, 10, 11, 18, 13, 13, 13, 13, 11, 11, 14, 14, 5, 12, 12, 11, 17, 14, 14, 13, 14, 13, 13, 14, 13, 13, 18, 13, 13, 13, 6, 8, 6, 9, 11, 7, 11, 11, 11, 12, 11, 9, 12, 11, 5, 6, 11, 5, 17, 11, 12, 11, 12, 8, 11, 8, 11, 10, 15, 10, 11, 10, 7, 6, 7, 13];
} else {
// advances taken from font_roboto_regular_20.c (column 3)
ctx.fontAdvances = [5, 5, 6, 13, 11, 15, 13, 4, 7, 7, 9, 12, 4, 7, 4, 8, 11, 11, 11, 11, 12, 12, 11, 12, 11, 11, 4, 4, 10, 10, 10, 10, 18, 13, 13, 13, 13, 12, 12, 13, 15, 6, 12, 13, 11, 18, 15, 13, 13, 13, 13, 12, 13, 12, 13, 18, 13, 12, 12, 5, 8, 6, 8, 11, 6, 10, 11, 11, 11, 11, 8, 11, 10, 4, 5, 10, 5, 17, 10, 12, 11, 12, 7, 10, 8, 10, 10, 15, 10, 9, 10, 7, 6, 8, 13];
}
}
}
function text(ctx, x, y, text, bold, mono) {
setFont(ctx, bold, mono);
ctx.fillText(text, x, y);
ppFillText(ctx, text, x, y);
}
function textCenter(ctx, x, y, text, bold, mono) {
setFont(ctx, bold, mono);
var w = ctx.measureText(text).width;
var w = ppMeasureWidth(ctx, text);
ctx.fillText(text, x - w / 2, y);
}