74 lines
3.2 KiB
JavaScript
74 lines
3.2 KiB
JavaScript
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export default {
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name: 'painter',
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handle: (dp, option) => {
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dp.canvas.width = option.width;
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dp.canvas.height = option.height;
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dp.draw(async (ctx) => {
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for (let i = 0; i < option.contents.length; i++) {
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ctx.save();
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const drawInfo = option.contents[i];
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const { left = 0, top = 0 } = drawInfo;
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if (drawInfo.type === 'rect') {
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ctx.fillStyle = drawInfo.background || '#000000';
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ctx.fillRoundRect(left, top, drawInfo.width, drawInfo.height, drawInfo.radius || 0);
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}
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if (drawInfo.type === 'image') {
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await ctx.drawImageFit(drawInfo.src, {
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objectFit: drawInfo.objectFit || 'cover',
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intrinsicPosition: drawInfo.position || ['center', 'center'],
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specifiedPosition: [left, top],
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specifiedSize: {
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width: drawInfo.width,
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height: drawInfo.height
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},
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radius: drawInfo.radius
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});
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}
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if (drawInfo.type === 'text') {
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ctx.fillStyle = drawInfo.color || '#000000';
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ctx.font = `\
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${drawInfo.fontStyle || 'normal'} \
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${drawInfo.fontWeight || 'normal'} \
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${drawInfo.fontSize || 30} \
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${drawInfo.fontFamily || 'serial'}\
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`;
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ctx.fillText(drawInfo.content, left, top, drawInfo.width);
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}
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if (drawInfo.type === 'line-feed-text') {
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ctx.fillStyle = drawInfo.color || '#000000';
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ctx.font = `\
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${drawInfo.fontStyle || 'normal'} \
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${drawInfo.fontWeight || 'normal'} \
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${drawInfo.fontSize || 30} \
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${drawInfo.fontFamily || 'serial'}\
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`;
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ctx.fillWarpText({
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x: drawInfo.left,
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y: drawInfo.top,
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layer: drawInfo.lineClamp,
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lineHeight: drawInfo.lineHeight,
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maxWidth: drawInfo.width,
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text: drawInfo.content
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});
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}
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if (drawInfo.type === 'qr-code') {
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if (typeof ctx.drawQrCode !== 'function') {
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console.error('--- 当前未引入qr-code扩展, 将自动省略该二维码绘制 ---');
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return false;
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}
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ctx.drawQrCode({
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x: left,
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y: top,
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size: drawInfo.size,
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text: drawInfo.content,
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margin: drawInfo.margin || 5,
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backgroundColor: drawInfo.backgroundColor || '#ffffff',
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foregroundColor: drawInfo.foregroundColor || '#000000',
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});
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}
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ctx.restore();
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}
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});
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}
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};
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