noVNC/tests/viewport.html

288 lines
9.1 KiB
HTML

<!DOCTYPE html>
<html>
<head><title>Viewport Test</title>
<link rel="stylesheet" href="../include/mobile.css">
<!--
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
-->
<meta name=viewport content="width=device-width, initial-scale=1.0, user-scalable=no">
</head>
<body>
<div class="fullscreen flex-layout">
<div>
Canvas:
<input id="move-selector" type="button" value="Move"
onclick="toggleMove();">
<br>
</div>
<div id="container" class="flex-box">
<canvas id="canvas"
style="border-style: dotted; border-width: 1px;">
Canvas not supported.
</canvas>
<br>
</div>
<div>
<br>
Results:<br>
<textarea id="messages" style="font-size: 9;" cols=80 rows=8></textarea>
</div>
</div>
</body>
<!--
<script type='text/javascript'
src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>
-->
<script src="../include/util.js"></script>
<script src="../include/webutil.js"></script>
<script src="../include/base64.js"></script>
<script src="../include/input.js"></script>
<script src="../include/display.js"></script>
<script>
var msg_cnt = 0, iterations,
fb_width = 800,
fb_height = 768,
viewport = {'x': 0, 'y': 0, 'w' : 0, 'h' : 0 },
cleanRect = {},
penDown = false, doMove = false,
inMove = false, lastPos = {},
canvas, ctx, keyboard, mouse;
var newline = "\n";
if (Util.Engine.trident) {
var newline = "<br>\n";
}
function message(str) {
console.log(str);
cell = $D('messages');
cell.innerHTML += msg_cnt + ": " + str + newline;
cell.scrollTop = cell.scrollHeight;
msg_cnt++;
}
function mouseButton(x, y, down, bmask) {
//msg = 'mouse x,y: ' + x + ',' + y + ' down: ' + down;
//msg += ' bmask: ' + bmask;
//message(msg);
if (doMove) {
if (down && !inMove) {
inMove = true;
lastPos = {'x': x, 'y': y};
cleanRect = {
'x1': viewport.x,
'y1': viewport.y,
'x2': viewport.x + viewport.w - 1,
'y2': viewport.y + viewport.h - 1};
} else if (!down && inMove) {
inMove = false;
dirtyRedraw();
}
return;
}
if (down && ! penDown) {
penDown = true;
ctx.beginPath();
ctx.moveTo(x, y);
} else if (!down && penDown) {
penDown = false;
ctx.closePath();
}
}
function mouseMove(x, y) {
var deltaX, deltaY, x1, y1;
if (inMove) {
viewportMove(x, y);
return;
}
if (penDown) {
ctx.lineTo(x, y);
ctx.stroke();
}
}
function viewportMove(x, y) {
var v = viewport, c = cleanRect,
vx2 = v.x + v.w - 1, vy2 = v.y + v.h - 1,
deltaX, deltaY, w, h;
//deltaX = x - lastPos.x; // drag viewport
deltaX = lastPos.x - x; // drag frame buffer
//deltaY = y - lastPos.y; // drag viewport
deltaY = lastPos.y - y; // drag frame buffer
lastPos = {'x': x, 'y': y};
if ((deltaX < 0) && ((v.x + deltaX) < 0)) {
deltaX = - v.x;
}
if ((vx2 + deltaX) >= fb_width) {
deltaX -= ((vx2 + deltaX) - fb_width + 1);
}
if ((v.y + deltaY) < 0) {
deltaY = - v.y;
}
if ((vy2 + deltaY) >= fb_height) {
deltaY -= ((vy2 + deltaY) - fb_height + 1);
}
if ((deltaX === 0) && (deltaY === 0)) {
//message("skipping");
return;
}
message("deltaX: " + deltaX + ", deltaY: " + deltaY);
v.x += deltaX;
vx2 += deltaX;
v.y += deltaY;
vy2 += deltaY;
// Update the clean rectangle
if (v.x > c.x1) {
c.x1 = v.x;
}
if (vx2 < c.x2) {
c.x2 = vx2;
}
if (v.y > c.y1) {
c.y1 = v.y;
}
if (vy2 < c.y2) {
c.y2 = vy2;
}
if (deltaX < 0) {
// Shift viewport left, redraw left section
x1 = 0;
w = - deltaX;
} else {
// Shift viewport right, redraw right section
x1 = v.w - deltaX;
w = deltaX;
}
if (deltaY < 0) {
// Shift viewport up, redraw top section
y1 = 0;
h = - deltaY;
} else {
// Shift viewport down, redraw bottom section
y1 = v.h - deltaY;
h = deltaY;
}
if (deltaX !== 0) {
canvas.copyImage(0, 0, -deltaX, 0, v.w, v.h);
canvas.fillRect(x1, 0, w, v.h, [255,255,255]);
}
if (deltaY !== 0) {
canvas.copyImage(0, 0, 0, -deltaY, v.w, v.h);
canvas.fillRect(0, y1, v.w, h, [255,255,255]);
}
}
function dirtyRedraw() {
var v = viewport, c = cleanRect,
vx2 = v.x + v.w - 1, vy2 = v.y + v.h - 1;
if ((c.x1 >= c.x2) || (c.y1 >= c.y2)) {
// Nothing clean, redraw everything
drawArea(0, 0, v.w, v.h);
} else {
// Redraw dirty regions
if (v.x < c.x1) {
// redraw left side dirty region
drawArea(0, 0, c.x1 - v.x, v.h);
}
if (vx2 > c.x2) {
// redraw right side dirty region
drawArea(v.w - (vx2 - c.x2), 0, vx2 - c.x2, v.h);
}
if (v.y < c.y1) {
// redraw top/middle dirty region
drawArea(c.x1 - v.x, 0, c.x2 - c.x1 + 1, c.y1 - v.y);
}
if (vy2 > c.y2) {
// redraw bottom/middle dirty region
drawArea(c.x1 - v.x, c.y2 - v.y, c.x2 - c.x1 + 1, v.h - (c.y2 - v.y));
}
}
}
function drawArea(x, y, w, h) {
message("draw "+x+","+y+" ("+w+","+h+")");
var imgData = ctx.createImageData(w, h),
data = imgData.data, pixel, realX, realY;
for (var i = 0; i < w; i++) {
realX = viewport.x + x + i;
for (var j = 0; j < h; j++) {
realY = viewport.y + y + j;
pixel = (j * w * 4 + i * 4);
data[pixel + 0] = ((realX * realY) / 13) % 256;
data[pixel + 1] = ((realX * realY) + 392) % 256;
data[pixel + 2] = ((realX + realY) + 256) % 256;
data[pixel + 3] = 255;
}
}
//message("i: " + i + ", j: " + j + ", pixel: " + pixel);
ctx.putImageData(imgData, x, y);
}
function toggleMove() {
if (doMove) {
doMove = false;
$D('move-selector').style.backgroundColor = "";
$D('move-selector').style.color = "";
} else {
doMove = true;
$D('move-selector').style.backgroundColor = "black";
$D('move-selector').style.color = "lightgray";
}
}
window.onresize = function() {
var v = viewport,
cw = $D('container').offsetWidth,
ch = $D('container').offsetHeight;
message("container: " + cw + "," + ch);
if (cw > fb_width) {
cw = fb_width;
}
if (ch > fb_height) {
ch = fb_height;
}
if ((cw !== v.w) || (ch !== v.h)) {
v.w = cw;
v.h = ch;
message("new viewport: " + v.w + "," + v.h);
canvas.resize(v.w, v.h);
drawArea(0, 0, v.w, v.h);
}
};
window.onload = function() {
canvas = new Display({'target' : $D('canvas')});
ctx = canvas.get_context();
mouse = new Mouse({'target': $D('canvas'),
'onMouseButton': mouseButton,
'onMouseMove': mouseMove});
window.onresize();
mouse.grab();
message("Display initialized");
};
</script>
</html>