Sakurai/pdf.js
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sbarman 2011-06-16 12:03:50 -07:00
parent d720575392
commit 72919470a9
1 changed files with 6 additions and 0 deletions
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pdf.js
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@ -2134,6 +2134,10 @@ var CanvasGraphics = (function() {
fn = new PDFFunction(this.xref, fnObj); fn = new PDFFunction(this.xref, fnObj);
var gradient = this.ctx.createLinearGradient(x0, y0, x1, y1); var gradient = this.ctx.createLinearGradient(x0, y0, x1, y1);
// 10 samples seems good enough for now, but probably won't work
// if there are sharp color changes. Ideally, we could see the
// current image size and base the # samples on that.
var step = (t1 - t0) / 10; var step = (t1 - t0) / 10;
for (var i = t0; i <= t1; i += step) { for (var i = t0; i <= t1; i += step) {
@ -2146,6 +2150,8 @@ var CanvasGraphics = (function() {
// HACK to draw the gradient onto an infinite rectangle. // HACK to draw the gradient onto an infinite rectangle.
// PDF gradients are drawn across the entire image while // PDF gradients are drawn across the entire image while
// Canvas only allows gradients to be drawn in a rectangle // Canvas only allows gradients to be drawn in a rectangle
// Also, larger numbers seem to cause overflow which causes
// nothing to be drawn.
this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10); this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
}, },