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add jpeg rendering

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This commit is contained in:
lxsang 2018-09-20 00:03:53 +02:00
parent f1bd204aff
commit e7693f8cc2
2 changed files with 92 additions and 26 deletions
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50
apps/assets/coffee/WVNC.coffee
View File

@ -37,7 +37,38 @@ class WVNC extends window.classes.BaseObject
# me.draw()
@draw()
updateCanvas: (x, y, w, h, pixels) ->
decodeFB: (d) ->
# the zlib is slower than expected
switch d.flag
when 0x0 # raw data
@drawRaw d.x, d.y, d.w, d.h, d.pixels
when 0x1 # jpeg data
@drawJPEG d.x, d.y, d.pixels
when 0x2 # raw compress in zlib format
pixels = pako.inflate(d.pixels)
@drawRaw d.x, d.y, d.w, d.h, pixels
when 0x3 # jpeg compress in zlib format
jpeg = pako.inflate(d.pixels)
@drawJPEG d.x, d.y, jpeg
drawJPEG: (x, y, data) ->
me = @
blob = new Blob [data], { type: "image/jpeg" }
reader = new FileReader()
reader.onloadend = () ->
hiddenImage = new Image()
hiddenImage.style.position = "absolute"
hiddenImage.style.left = "-99999px"
document.body.appendChild hiddenImage
hiddenImage.onload = () ->
ctx = me.buffer.getContext '2d'
ctx.drawImage hiddenImage, x, y
document.body.removeChild hiddenImage
me.draw()
hiddenImage.src = reader.result
reader.readAsDataURL blob
drawRaw: (x, y, w, h, pixels) ->
ctx = @buffer.getContext('2d')
ctx.globalAlpha = 1.0
imgData = ctx.createImageData w, h
@ -177,16 +208,15 @@ class WVNC extends window.classes.BaseObject
@socket.send(@buildCommand 0x04, 1)
when 0x84
#console.log "update"
x = data[1] | (data[2]<<8)
y = data[3] | (data[4]<<8)
w = data[5] | (data[6]<<8)
h = data[7] | (data[8]<<8)
zlib = data[9]
d = {}
d.x = data[1] | (data[2]<<8)
d.y = data[3] | (data[4]<<8)
d.w = data[5] | (data[6]<<8)
d.h = data[7] | (data[8]<<8)
d.flag = data[9]
#console.log zlib
pixels = data.subarray 10
# the zlib is slower than expected
pixels = pako.inflate(pixels) if zlib is 1
@updateCanvas x, y, w, h, pixels
d.pixels = data.subarray 10
@decodeFB d
# ack
#@socket.send(@buildCommand 0x04, 1)
else

68
apps/assets/scripts/main.js
View File

@ -217,7 +217,48 @@
return this.draw();
};
WVNC.prototype.updateCanvas = function(x, y, w, h, pixels) {
WVNC.prototype.decodeFB = function(d) {
var jpeg, pixels;
switch (d.flag) {
case 0x0:
return this.drawRaw(d.x, d.y, d.w, d.h, d.pixels);
case 0x1:
return this.drawJPEG(d.x, d.y, d.pixels);
case 0x2:
pixels = pako.inflate(d.pixels);
return this.drawRaw(d.x, d.y, d.w, d.h, pixels);
case 0x3:
jpeg = pako.inflate(d.pixels);
return this.drawJPEG(d.x, d.y, jpeg);
}
};
WVNC.prototype.drawJPEG = function(x, y, data) {
var blob, me, reader;
me = this;
blob = new Blob([data], {
type: "image/jpeg"
});
reader = new FileReader();
reader.onloadend = function() {
var hiddenImage;
hiddenImage = new Image();
hiddenImage.style.position = "absolute";
hiddenImage.style.left = "-99999px";
document.body.appendChild(hiddenImage);
hiddenImage.onload = function() {
var ctx;
ctx = me.buffer.getContext('2d');
ctx.drawImage(hiddenImage, x, y);
document.body.removeChild(hiddenImage);
return me.draw();
};
return hiddenImage.src = reader.result;
};
return reader.readAsDataURL(blob);
};
WVNC.prototype.drawRaw = function(x, y, w, h, pixels) {
var ctx, imgData;
ctx = this.buffer.getContext('2d');
ctx.globalAlpha = 1.0;
@ -225,10 +266,7 @@
imgData.data.set(this.getCanvasImageData(pixels, w, h));
ctx.putImageData(imgData, x, y);
this.counter = this.counter + 1;
if (this.counter > 50) {
this.draw();
return this.couter = 0;
}
return this.draw();
};
WVNC.prototype.getCanvasImageData = function(pixels, w, h) {
@ -357,7 +395,7 @@
};
WVNC.prototype.consume = function(e) {
var arr, cmd, data, dec, depth, h, pass, pixels, user, w, x, y, zlib;
var arr, cmd, d, data, dec, depth, h, pass, user, w;
data = new Uint8Array(e.data);
cmd = data[0];
switch (cmd) {
@ -386,16 +424,14 @@
this.initCanvas(w, h, depth);
return this.socket.send(this.buildCommand(0x04, 1));
case 0x84:
x = data[1] | (data[2] << 8);
y = data[3] | (data[4] << 8);
w = data[5] | (data[6] << 8);
h = data[7] | (data[8] << 8);
zlib = data[9];
pixels = data.subarray(10);
if (zlib === 1) {
pixels = pako.inflate(pixels);
}
return this.updateCanvas(x, y, w, h, pixels);
d = {};
d.x = data[1] | (data[2] << 8);
d.y = data[3] | (data[4] << 8);
d.w = data[5] | (data[6] << 8);
d.h = data[7] | (data[8] << 8);
d.flag = data[9];
d.pixels = data.subarray(10);
return this.decodeFB(d);
default:
return console.log(cmd);
}