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67b4e9879a
Generally, most servers send hextile updates as single updates containing many rects. Some servers send hextile updates as many small framebuffer updates with a few rects each (such as QEMU). This latter cases revealed that shifting off the beginning of the receive queue (which happens after each hextile FBU) performs poorly. This change switches to using an indexed receive queue (instead of actually shifting off the array). When the receive queue has grown to a certain size, then it is compacted all at once. The code is not as clean, but this change results in more than 2X speedup under Chrome for the pessimal case and 10-20% in firefox.
135 lines
4.4 KiB
HTML
135 lines
4.4 KiB
HTML
<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Cursor Change test</title>
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<meta charset="UTF-8">
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<!--
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<script type='text/javascript'
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src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>
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-->
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<script src="include/util.js"></script>
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<script src="include/base64.js"></script>
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<script src="include/canvas.js"></script>
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</head>
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<body>
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<h1>Roll over the buttons to test cursors</h1>
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<br>
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<input id=button1 type="button" value="Cursor from file (smiley face)">
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<input id=button2 type="button" value="Data URI cursor (crosshair)">
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<br>
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<br>
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<br>
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Debug:<br>
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<textarea id="debug" style="font-size: 9px;" cols=80 rows=25></textarea>
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<br>
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<br>
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<canvas id="testcanvas" width="100px" height="20px">
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Canvas not supported.
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</canvas>
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</body>
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<script>
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function debug(str) {
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console.log(str);
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cell = $('debug');
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cell.innerHTML += str + "\n";
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cell.scrollTop = cell.scrollHeight;
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}
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function makeCursor() {
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var arr = [], x, y, w = 32, h = 32, hx = 16, hy = 16;
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var IHDRsz = 40;
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var ANDsz = w * h * 4;
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var XORsz = Math.ceil( (w * h) / 8.0 );
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// Push multi-byte little-endian values
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arr.push16le = function (num) {
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this.push((num ) & 0xFF,
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(num >> 8) & 0xFF );
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};
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arr.push32le = function (num) {
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this.push((num ) & 0xFF,
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(num >> 8) & 0xFF,
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(num >> 16) & 0xFF,
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(num >> 24) & 0xFF );
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};
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// Main header
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arr.push16le(0); // Reserved
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arr.push16le(2); // .CUR type
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arr.push16le(1); // Number of images, 1 for non-animated arr
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// Cursor #1
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arr.push(w); // width
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arr.push(h); // height
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arr.push(0); // colors, 0 -> true-color
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arr.push(0); // reserved
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arr.push16le(hx); // hotspot x coordinate
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arr.push16le(hy); // hotspot y coordinate
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arr.push32le(IHDRsz + XORsz + ANDsz); // cursor data byte size
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arr.push32le(22); // offset of cursor data in the file
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// Infoheader for Cursor #1
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arr.push32le(IHDRsz); // Infoheader size
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arr.push32le(w); // Cursor width
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arr.push32le(h*2); // XOR+AND height
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arr.push16le(1); // number of planes
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arr.push16le(32); // bits per pixel
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arr.push32le(0); // type of compression
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arr.push32le(XORsz + ANDsz); // Size of Image
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arr.push32le(0);
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arr.push32le(0);
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arr.push32le(0);
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arr.push32le(0);
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// XOR/color data
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for (y = h-1; y >= 0; y--) {
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for (x = 0; x < w; x++) {
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//if ((x === hx) || (y === (h-hy-1))) {
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if ((x === hx) || (y === hy)) {
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arr.push(0xe0); // blue
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arr.push(0x00); // green
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arr.push(0x00); // red
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arr.push(0xff); // alpha
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} else {
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arr.push(0x05); // blue
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arr.push(0xe6); // green
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arr.push(0x00); // red
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arr.push(0x80); // alpha
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}
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}
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}
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// AND/bitmask data (seems to be ignored)
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for (y = 0; y < h; y++) {
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for (x = 0; x < Math.ceil(w / 8); x++) {
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arr.push(0x00);
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}
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}
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debug("cursor generated");
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return arr;
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}
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window.onload = function() {
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debug("onload");
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var canvas, cross, cursor, cursor64;
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canvas = new Canvas({'target' : "testcanvas"});
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debug("canvas indicates Data URI cursor support is: " + canvas.get_cursor_uri());
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$('button1').style.cursor="url(face.png), default";
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cursor = makeCursor();
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cursor64 = Base64.encode(cursor);
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//debug("cursor: " + cursor.slice(0,100) + " (" + cursor.length + ")");
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//debug("cursor64: " + cursor64.slice(0,100) + " (" + cursor64.length + ")");
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$('button2').style.cursor="url(data:image/x-icon;base64," + cursor64 + "), default";
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debug("onload complete");
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}
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</script>
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