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Stops bleeding of pattern edges for mesh.

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This commit is contained in:
Yury Delendik 2016-04-11 18:21:44 -05:00
parent be6754a1a0
commit 398e6acbc5
3 changed files with 24 additions and 5 deletions
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20
src/display/pattern_helper.js
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@ -169,6 +169,9 @@ var createMeshCanvas = (function createMeshCanvasClosure() {
var EXPECTED_SCALE = 1.1;
// MAX_PATTERN_SIZE is used to avoid OOM situation.
var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
// We need to keep transparent border around our pattern for fill():
// createPattern with 'no-repeat' will bleed edges accross entire area.
var BORDER_SIZE = 2;
var offsetX = Math.floor(bounds[0]);
var offsetY = Math.floor(bounds[1]);
@ -191,17 +194,22 @@ var createMeshCanvas = (function createMeshCanvasClosure() {
scaleY: 1 / scaleY
};
var paddedWidth = width + BORDER_SIZE * 2;
var paddedHeight = height + BORDER_SIZE * 2;
var canvas, tmpCanvas, i, ii;
if (WebGLUtils.isEnabled) {
canvas = WebGLUtils.drawFigures(width, height, backgroundColor,
figures, context);
// https://bugzilla.mozilla.org/show_bug.cgi?id=972126
tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false);
tmpCanvas.context.drawImage(canvas, 0, 0);
tmpCanvas = cachedCanvases.getCanvas('mesh', paddedWidth, paddedHeight,
false);
tmpCanvas.context.drawImage(canvas, BORDER_SIZE, BORDER_SIZE);
canvas = tmpCanvas.canvas;
} else {
tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false);
tmpCanvas = cachedCanvases.getCanvas('mesh', paddedWidth, paddedHeight,
false);
var tmpCtx = tmpCanvas.context;
var data = tmpCtx.createImageData(width, height);
@ -217,11 +225,13 @@ var createMeshCanvas = (function createMeshCanvasClosure() {
for (i = 0; i < figures.length; i++) {
drawFigure(data, figures[i], context);
}
tmpCtx.putImageData(data, 0, 0);
tmpCtx.putImageData(data, BORDER_SIZE, BORDER_SIZE);
canvas = tmpCanvas.canvas;
}
return {canvas: canvas, offsetX: offsetX, offsetY: offsetY,
return {canvas: canvas,
offsetX: offsetX - BORDER_SIZE * scaleX,
offsetY: offsetY - BORDER_SIZE * scaleY,
scaleX: scaleX, scaleY: scaleY};
}
return createMeshCanvas;