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Add behavior for vector-effect #2

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Add behavior for vector-effect #2

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68 changes: 62 additions & 6 deletions source.js
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,8 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
'display': {inherit: false, initial: 'inline', values: {'none':'none', 'inline':'inline', 'block':'inline'}},
'clip-path': {inherit: false, initial: 'none'},
'mask': {inherit: false, initial: 'none'},
'overflow': {inherit: false, initial: 'hidden', values: {'hidden':'hidden', 'scroll':'hidden', 'visible':'visible'}}
'overflow': {inherit: false, initial: 'hidden', values: {'hidden':'hidden', 'scroll':'hidden', 'visible':'visible'}},
'vector-effect': {inherit: true, initial: 'none', values: {'none':'none', 'non-scaling-stroke':'non-scaling-stroke'}}
};

function docBeginGroup(bbox) {
Expand Down Expand Up @@ -112,6 +113,15 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
doc.page.ext_gstates[name] = gstate;
doc.addContent('/' + name + ' gs');
}
function applyBlendMode(group, blendMode) {
let name = 'M' + blendMode;
let gstate = doc.ref({
Type: 'ExtGState', CA: 1, ca: 1, BM: blendMode, G: group.xobj
});
gstate.end();
doc.page.ext_gstates[name] = gstate;
doc.addContent('/' + name + ' gs');
}
function docCreatePattern(group, dx, dy, matrix) {
let pattern = new (function PDFPattern() {})();
pattern.group = group;
Expand Down Expand Up @@ -420,6 +430,11 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
return new SvgShape().M(0, 0).L(doc.page.width, 0).L(doc.page.width, doc.page.height).L(0, doc.page.height)
.transform(inverseMatrix(getGlobalMatrix())).getBoundingBox();
}
function getPageScale() {
const bbox = getPageBBox();
const width = doc.page.width;
return width / bbox[2];
}
function inverseMatrix(m) {
let dt = m[0] * m[3] - m[1] * m[2];
return [m[3] / dt, -m[1] / dt, -m[2] / dt, m[0] / dt, (m[2]*m[5] - m[3]*m[4]) / dt, (m[1]*m[4] - m[0]*m[5]) / dt];
Expand Down Expand Up @@ -701,6 +716,24 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
}
}

/* Utilities for blend modes */
function getObjectStyles(obj) {
if (!obj.attributes.style) return {};

const styles = obj.attributes.style.split(';');
return styles.reduce((acc, style) => {
const [key, value] = style.split(':');
if (!key) {return acc;}
acc[key.trim()] = value.trim();
return acc;
}, {});
}

// pdf BlendModes https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdf_reference_archive/blend_modes.pdf
function parseCSSBlendMode(blendMode) {
return blendMode.split('-').map(string => string.charAt(0).toUpperCase() + string.slice(1)).join('');
}

var StringParser = function(str) {
this.match = function(exp, all) {
let temp = str.match(exp);
Expand Down Expand Up @@ -1446,17 +1479,20 @@ var SVGtoPDF = function(doc, svg, x, y, options) {

var SvgElemContainer = function(obj, inherits) {
SvgElemHasChildren.call(this, obj, inherits);
this.drawContent = function(isClip, isMask) {
this.drawContent = function(isClip, isMask, blendMode) {
this.transform();
let clipped = this.clip(),
masked = this.mask(),
group;
if ((this.get('opacity') < 1 || clipped || masked) && !isClip) {
if ((this.get('opacity') < 1 || clipped || masked || blendMode) && !isClip) {
group = docBeginGroup(getPageBBox());
}
this.drawChildren(isClip, isMask);
if (group) {
docEndGroup(group);
if (blendMode) {
applyBlendMode(group, blendMode);
}
doc.fillOpacity(this.get('opacity'));
docInsertGroup(group);
}
Expand Down Expand Up @@ -1513,7 +1549,15 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
this.drawInDocument = function(isClip, isMask) {
doc.save();
if (this.link && !isClip && !isMask) {this.addLink();}
this.drawContent(isClip, isMask);

// parse object styles and apply blendMode
const styles = getObjectStyles(obj);
if (styles['mix-blend-mode']) {
this.drawContent(isClip, isMask, parseCSSBlendMode(styles['mix-blend-mode']));
} else {
this.drawContent(isClip, isMask);
}

doc.restore();
};
this.getTransformation = function() {
Expand Down Expand Up @@ -1842,7 +1886,11 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
this.drawInDocument = function(isClip, isMask) {
if (this.get('visibility') === 'hidden' || !this.shape) {return;}
doc.save();
this.transform();
if (this.get('vector-effect') === 'non-scaling-stroke') {
this.shape.transform(this.getTransformation());
} else {
this.transform();
}
this.clip();
if (!isClip) {
let masked = this.mask(),
Expand All @@ -1855,6 +1903,14 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
stroke = this.getStroke(isClip, isMask),
lineWidth = this.get('stroke-width'),
lineCap = this.get('stroke-linecap');

console.log('BasicShape', this.get('vector-effect'))
if (this.get('vector-effect') === 'non-scaling-stroke') {
let aLW = lineWidth;
lineWidth = lineWidth / getPageScale();
console.log(alw, '->', lineWidth)
}

if (fill || stroke) {
if (fill) {
docFillColor(fill);
Expand Down Expand Up @@ -2601,5 +2657,5 @@ var SVGtoPDF = function(doc, svg, x, y, options) {
};

if (typeof module !== 'undefined' && module && typeof module.exports !== 'undefined') {
module.exports = SVGtoPDF;
module.exports = SVGtoPDF;
}