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Ensure that the temporary canvas created in CanvasGraphics.isFontSubpixelAAEnabled will be cleared

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While this particular canvas may be small, there can still be an arbitrarily large number of them (one per page rendered), which can/will eventually add up memory wise. This can be easily avoided by using the `cachedCanvases` abstraction instead, which will ensure that the `isFontSubpixelAAEnabled` canvas is removed together with other temporary canvases in `CanvasGraphics.endDrawing`.
This commit is contained in:
Jonas Jenwald 2019-02-28 14:06:56 +01:00
parent 21d70b19c2
commit b61b4d3229
1 changed files with 2 additions and 1 deletions
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src/display/canvas.js
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@ -1414,7 +1414,8 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
get isFontSubpixelAAEnabled() { get isFontSubpixelAAEnabled() {
// Checks if anti-aliasing is enabled when scaled text is painted. // Checks if anti-aliasing is enabled when scaled text is painted.
// On Windows GDI scaled fonts looks bad. // On Windows GDI scaled fonts looks bad.
var ctx = this.canvasFactory.create(10, 10).context; const { context: ctx, } =
this.cachedCanvases.getCanvas('isFontSubpixelAAEnabled', 10, 10);
ctx.scale(1.5, 1); ctx.scale(1.5, 1);
ctx.fillText('I', 0, 10); ctx.fillText('I', 0, 10);
var data = ctx.getImageData(0, 0, 10, 10).data; var data = ctx.getImageData(0, 0, 10, 10).data;