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@ -1,21 +1,15 @@
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const VQRCODE = require('./vqrcode');
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const WIN = window; // eslint-disable-line no-undef
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const WIN = window; // eslint-disable-line
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const JQ = WIN.jQuery;
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// Check if canvas is available in the browser (as Modernizr does)
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const HAS_CANVAS = (() => {
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const el = WIN.document.createElement('canvas');
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return !!(el.getContext && el.getContext('2d'));
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})();
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const is_img_el = x => x && typeof x.tagName === 'string' && x.tagName.toUpperCase() === 'IMG';
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// Wrapper for the original QR code generator.
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const create_qrcode = (text, level, version, quiet) => {
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const qr = {};
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const vqr = VQRCODE(version, level);
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const qr_gen = require('qrcode-generator');
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qr_gen.stringToBytes = qr_gen.stringToBytesFuncs['UTF-8'];
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const vqr = qr_gen(version, level);
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vqr.addData(text);
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vqr.make();
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@ -66,14 +60,14 @@ const create_min_qrcode = (text, level, min_ver, max_ver, quiet) => {
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return undefined;
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};
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const draw_background_label = (qr, context, settings) => {
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const draw_background_label = (qr, ctx, settings) => {
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const size = settings.size;
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const font = 'bold ' + settings.mSize * size + 'px ' + settings.fontname;
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const ctx = JQ('<canvas/>')[0].getContext('2d');
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const tmp_ctx = JQ('<canvas/>')[0].getContext('2d');
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ctx.font = font;
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tmp_ctx.font = font;
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const w = ctx.measureText(settings.label).width;
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const w = tmp_ctx.measureText(settings.label).width;
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const sh = settings.mSize;
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const sw = w / size;
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const sl = (1 - sw) * settings.mPosX;
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@ -90,12 +84,12 @@ const draw_background_label = (qr, context, settings) => {
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qr.add_blank(sl - pad, st - pad, sr + pad, sb + pad);
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}
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context.fillStyle = settings.fontcolor;
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context.font = font;
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context.fillText(settings.label, sl * size, st * size + 0.75 * settings.mSize * size);
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ctx.fillStyle = settings.fontcolor;
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ctx.font = font;
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ctx.fillText(settings.label, sl * size, st * size + 0.75 * settings.mSize * size);
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};
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const draw_background_img = (qr, context, settings) => {
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const draw_background_img = (qr, ctx, settings) => {
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const size = settings.size;
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const w = settings.image.naturalWidth || 1;
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const h = settings.image.naturalHeight || 1;
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@ -115,159 +109,150 @@ const draw_background_img = (qr, context, settings) => {
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qr.add_blank(sl - pad, st - pad, sr + pad, sb + pad);
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}
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context.drawImage(settings.image, sl * size, st * size, sw * size, sh * size);
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ctx.drawImage(settings.image, sl * size, st * size, sw * size, sh * size);
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};
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const draw_background = (qr, context, settings) => {
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const draw_background = (qr, ctx, settings) => {
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if (is_img_el(settings.background)) {
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context.drawImage(settings.background, 0, 0, settings.size, settings.size);
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ctx.drawImage(settings.background, 0, 0, settings.size, settings.size);
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} else if (settings.background) {
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context.fillStyle = settings.background;
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context.fillRect(settings.left, settings.top, settings.size, settings.size);
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ctx.fillStyle = settings.background;
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ctx.fillRect(settings.left, settings.top, settings.size, settings.size);
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}
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const mode = settings.mode;
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if (mode === 1 || mode === 2) {
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draw_background_label(qr, context, settings);
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draw_background_label(qr, ctx, settings);
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} else if (is_img_el(settings.image) && (mode === 3 || mode === 4)) {
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draw_background_img(qr, context, settings);
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draw_background_img(qr, ctx, settings);
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}
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};
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const draw_modules_default = (qr, context, settings, left, top, width, row, col) => {
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const draw_modules_default = (qr, ctx, settings, left, top, width, row, col) => {
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if (qr.is_dark(row, col)) {
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context.rect(left, top, width, width);
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ctx.r(left, top, width, width);
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}
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};
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const draw_modules_rounded_dark = (ctx, l, t, r, b, rad, nw, ne, se, sw) => {
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if (nw) {
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ctx.moveTo(l + rad, t);
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ctx.m(l + rad, t);
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} else {
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ctx.moveTo(l, t);
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ctx.m(l, t);
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}
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if (ne) {
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ctx.lineTo(r - rad, t);
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ctx.arcTo(r, t, r, b, rad);
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ctx.l(r - rad, t).a(r, t, r, b, rad);
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} else {
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ctx.lineTo(r, t);
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ctx.l(r, t);
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}
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if (se) {
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ctx.lineTo(r, b - rad);
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ctx.arcTo(r, b, l, b, rad);
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ctx.l(r, b - rad).a(r, b, l, b, rad);
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} else {
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ctx.lineTo(r, b);
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ctx.l(r, b);
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}
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if (sw) {
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ctx.lineTo(l + rad, b);
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ctx.arcTo(l, b, l, t, rad);
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ctx.l(l + rad, b).a(l, b, l, t, rad);
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} else {
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ctx.lineTo(l, b);
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ctx.l(l, b);
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}
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if (nw) {
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ctx.lineTo(l, t + rad);
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ctx.arcTo(l, t, r, t, rad);
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ctx.l(l, t + rad).a(l, t, r, t, rad);
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} else {
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ctx.lineTo(l, t);
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ctx.l(l, t);
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}
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};
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const draw_modules_rounded_light = (ctx, l, t, r, b, rad, nw, ne, se, sw) => {
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if (nw) {
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ctx.moveTo(l + rad, t);
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ctx.lineTo(l, t);
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ctx.lineTo(l, t + rad);
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ctx.arcTo(l, t, l + rad, t, rad);
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ctx.m(l + rad, t).l(l, t).l(l, t + rad).a(l, t, l + rad, t, rad);
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}
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if (ne) {
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ctx.moveTo(r - rad, t);
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ctx.lineTo(r, t);
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ctx.lineTo(r, t + rad);
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ctx.arcTo(r, t, r - rad, t, rad);
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ctx.m(r - rad, t).l(r, t).l(r, t + rad).a(r, t, r - rad, t, rad);
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}
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if (se) {
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ctx.moveTo(r - rad, b);
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ctx.lineTo(r, b);
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ctx.lineTo(r, b - rad);
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ctx.arcTo(r, b, r - rad, b, rad);
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ctx.m(r - rad, b).l(r, b).l(r, b - rad).a(r, b, r - rad, b, rad);
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}
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if (sw) {
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ctx.moveTo(l + rad, b);
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ctx.lineTo(l, b);
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ctx.lineTo(l, b - rad);
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ctx.arcTo(l, b, l + rad, b, rad);
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ctx.m(l + rad, b).l(l, b).l(l, b - rad).a(l, b, l + rad, b, rad);
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}
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};
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const draw_modules_rounded = (qr, context, settings, left, top, width, row, col) => {
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const is_dark = qr.is_dark;
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const draw_modules_rounded = (qr, ctx, settings, left, top, width, row, col) => {
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const right = left + width;
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const bottom = top + width;
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const radius = settings.radius * width;
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const rowT = row - 1;
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const rowB = row + 1;
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const colL = col - 1;
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const colR = col + 1;
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const center = is_dark(row, col);
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const northwest = is_dark(rowT, colL);
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const north = is_dark(rowT, col);
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const northeast = is_dark(rowT, colR);
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const east = is_dark(row, colR);
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const southeast = is_dark(rowB, colR);
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const south = is_dark(rowB, col);
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const southwest = is_dark(rowB, colL);
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const west = is_dark(row, colL);
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if (center) {
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draw_modules_rounded_dark(context, left, top, right, bottom, radius, !north && !west, !north && !east, !south && !east, !south && !west);
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const rad = settings.radius * width;
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const row_n = row - 1;
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const row_s = row + 1;
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const col_w = col - 1;
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const col_e = col + 1;
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const is_dark = qr.is_dark;
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const d_center = is_dark(row, col);
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const d_nw = is_dark(row_n, col_w);
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const d_n = is_dark(row_n, col);
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const d_ne = is_dark(row_n, col_e);
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const d_e = is_dark(row, col_e);
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const d_se = is_dark(row_s, col_e);
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const d_s = is_dark(row_s, col);
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const d_sw = is_dark(row_s, col_w);
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const d_w = is_dark(row, col_w);
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if (d_center) {
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draw_modules_rounded_dark(ctx, left, top, right, bottom, rad, !d_n && !d_w, !d_n && !d_e, !d_s && !d_e, !d_s && !d_w);
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} else {
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draw_modules_rounded_light(context, left, top, right, bottom, radius, north && west && northwest, north && east && northeast, south && east && southeast, south && west && southwest);
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draw_modules_rounded_light(ctx, left, top, right, bottom, rad, d_n && d_w && d_nw, d_n && d_e && d_ne, d_s && d_e && d_se, d_s && d_w && d_sw);
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}
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};
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const draw_modules = (qr, context, settings) => {
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const draw_modules = (qr, ctx, settings) => {
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const module_count = qr.module_count;
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const module_size = settings.size / module_count;
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let fn = draw_modules_default;
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let row;
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let col;
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let fn = draw_modules_default;
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if (settings.radius > 0 && settings.radius <= 0.5) {
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fn = draw_modules_rounded;
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}
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context.beginPath();
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for (row = 0; row < module_count; row += 1) {
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for (col = 0; col < module_count; col += 1) {
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const draw_ctx = {
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m(x, y) {ctx.moveTo(x, y); return draw_ctx;},
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l(x, y) {ctx.lineTo(x, y); return draw_ctx;},
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a(...args) {ctx.arcTo(...args); return draw_ctx;},
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r(...args) {ctx.rect(...args); return draw_ctx;}
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};
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ctx.beginPath();
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for (let row = 0; row < module_count; row += 1) {
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for (let col = 0; col < module_count; col += 1) {
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const l = settings.left + col * module_size;
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const t = settings.top + row * module_size;
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const w = module_size;
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fn(qr, context, settings, l, t, w, row, col);
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fn(qr, draw_ctx, settings, l, t, w, row, col);
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}
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}
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if (is_img_el(settings.fill)) {
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context.strokeStyle = 'rgba(0,0,0,0.5)';
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context.lineWidth = 2;
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context.stroke();
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const prev = context.globalCompositeOperation;
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context.globalCompositeOperation = 'destination-out';
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context.fill();
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context.globalCompositeOperation = prev;
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context.clip();
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context.drawImage(settings.fill, 0, 0, settings.size, settings.size);
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context.restore();
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ctx.strokeStyle = 'rgba(0,0,0,0.5)';
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ctx.lineWidth = 2;
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ctx.stroke();
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const prev = ctx.globalCompositeOperation;
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ctx.globalCompositeOperation = 'destination-out';
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ctx.fill();
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ctx.globalCompositeOperation = prev;
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ctx.clip();
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ctx.drawImage(settings.fill, 0, 0, settings.size, settings.size);
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ctx.restore();
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} else {
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context.fillStyle = settings.fill;
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context.fill();
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ctx.fillStyle = settings.fill;
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ctx.fill();
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}
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};
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@ -279,10 +264,10 @@ const draw_on_canvas = (canvas, settings) => {
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}
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const $canvas = JQ(canvas).data('qrcode', qr);
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const context = $canvas[0].getContext('2d');
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const ctx = $canvas[0].getContext('2d');
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draw_background(qr, context, settings);
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draw_modules(qr, context, settings);
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draw_background(qr, ctx, settings);
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draw_modules(qr, ctx, settings);
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return $canvas;
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};
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@ -314,9 +299,6 @@ const create_div = settings => {
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const module_size = math_floor(settings_size / module_count);
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const offset = math_floor(0.5 * (settings_size - module_size * module_count));
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let row;
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let col;
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const container_css = {
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position: 'relative',
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left: 0,
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@ -341,8 +323,8 @@ const create_div = settings => {
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$div.css('background-color', settings_bgColor);
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}
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for (row = 0; row < module_count; row += 1) {
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for (col = 0; col < module_count; col += 1) {
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for (let row = 0; row < module_count; row += 1) {
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for (let col = 0; col < module_count; col += 1) {
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if (qr.is_dark(row, col)) {
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JQ('<div/>')
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.css(dark_css)
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@ -359,9 +341,9 @@ const create_div = settings => {
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};
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const create_html = settings => {
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if (HAS_CANVAS && settings.render === 'canvas') {
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if (settings.render === 'canvas') {
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return create_canvas(settings);
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} else if (HAS_CANVAS && settings.render === 'image') {
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} else if (settings.render === 'image') {
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return create_img(settings);
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}
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Lars Jung
