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Minor performance enhancements - do NOT take thumbnails every 1000ms, and only use transfer function if not NOP and not a simple copy.

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This commit is contained in:
Michael Jumper
2013-11-06 15:32:41 -08:00
parent a47735969b
commit c71ea434c9
3 changed files with 70 additions and 29 deletions
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45
guacamole-common-js/src/main/resources/layer.js
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@@ -647,6 +647,51 @@ Guacamole.Layer = function(width, height) {
});
};
/**
* Put a rectangle of image data from one Layer to this Layer directly
* without performing any alpha blending. Simply copy the data.
*
* @param {Guacamole.Layer} srcLayer The Layer to copy image data from.
* @param {Number} srcx The X coordinate of the upper-left corner of the
* rectangle within the source Layer's coordinate
* space to copy data from.
* @param {Number} srcy The Y coordinate of the upper-left corner of the
* rectangle within the source Layer's coordinate
* space to copy data from.
* @param {Number} srcw The width of the rectangle within the source Layer's
* coordinate space to copy data from.
* @param {Number} srch The height of the rectangle within the source
* Layer's coordinate space to copy data from.
* @param {Number} x The destination X coordinate.
* @param {Number} y The destination Y coordinate.
*/
this.put = function(srcLayer, srcx, srcy, srcw, srch, x, y) {
scheduleTaskSynced(srcLayer, function() {
var srcCanvas = srcLayer.getCanvas();
// If entire rectangle outside source canvas, stop
if (srcx >= srcCanvas.width || srcy >= srcCanvas.height) return;
// Otherwise, clip rectangle to area
if (srcx + srcw > srcCanvas.width)
srcw = srcCanvas.width - srcx;
if (srcy + srch > srcCanvas.height)
srch = srcCanvas.height - srcy;
// Stop if nothing to draw.
if (srcw == 0 || srch == 0) return;
if (layer.autosize != 0) fitRect(x, y, srcw, srch);
// Get image data from src and dst
var src = srcLayer.getCanvas().getContext("2d").getImageData(srcx, srcy, srcw, srch);
displayContext.putImageData(src, x, y);
});
};
/**
* Copy a rectangle of image data from one Layer to this Layer. This
* operation will copy exactly the image data that will be drawn once all