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// WebGLWorker client code
function assert(x) {
if (!x) throw 'failed assert';
}
function WebGLClient() {
var objects = {};
var ctx = null;
var buffer = null;
var i = 0;
function func0(name) {
ctx[name]();
}
function func1(name) {
ctx[name](buffer[i]);
i++;
}
function func2(name) {
ctx[name](buffer[i], buffer[i+1]);
i += 2;
}
function func3(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2]);
i += 3;
}
function func4(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2], buffer[i+3]);
i += 4;
}
function func5(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2], buffer[i+3], buffer[i+4]);
i += 5;
}
function func6(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2], buffer[i+3], buffer[i+4], buffer[i+5]);
i += 6;
}
function func7(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2], buffer[i+3], buffer[i+4], buffer[i+5], buffer[i+6]);
i += 7;
}
function func9(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2], buffer[i+3], buffer[i+4], buffer[i+5], buffer[i+6], buffer[i+7], buffer[i+8]);
i += 9;
}
// lookuppers, convert integer ids to cached objects for some args
function func1L0(name) {
ctx[name](objects[buffer[i]]);
i++;
}
function func2L0(name) {
ctx[name](objects[buffer[i]], buffer[i+1]);
i += 2;
}
function func2L0L1(name) {
ctx[name](objects[buffer[i]], objects[buffer[i+1]]);
i += 2;
}
function func2L1_(name) {
ctx[name](buffer[i], buffer[i+1] ? objects[buffer[i+1]] : null);
i += 2;
}
function func3L0(name) {
ctx[name](objects[buffer[i]], buffer[i+1], buffer[i+2]);
i += 3;
}
function func4L3_(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2], buffer[i+3] ? objects[buffer[i+3]] : null);
i += 4;
}
function func5L3_(name) {
ctx[name](buffer[i], buffer[i+1], buffer[i+2], buffer[i+3] ? objects[buffer[i+3]] : null, buffer[i+4]);
i += 5;
}
// constructors, last argument is the id to save as
function funcC0(name) {
var object = ctx[name]();
var id = buffer[i++];
objects[id] = object;
}
function funcC1(name) {
var object = ctx[name](buffer[i++]);
var id = buffer[i++];
objects[id] = object;
}
function funcC2(name) {
var object = ctx[name](buffer[i++], buffer[i++]);
var id = buffer[i++];
objects[id] = object;
}
function funcC2L0(name) {
var object = ctx[name](objects[buffer[i++]], buffer[i++]);
var id = buffer[i++];
objects[id] = object;
}
// destructors, stop holding on to the object in the cache
function funcD0(name) {
var id = buffer[i++];
var object = objects[id];
objects[id] = null;
ctx[name](object);
}
var calls = {
0: { name: 'NULL', func: func0 },
1: { name: 'getExtension', func: func1 },
2: { name: 'enable', func: func1 },
3: { name: 'disable', func: func1 },
4: { name: 'clear', func: func1 },
5: { name: 'clearColor', func: func4 },
6: { name: 'createShader', func: funcC1 },
7: { name: 'deleteShader', func: funcD0 },
8: { name: 'shaderSource', func: func2L0 },
9: { name: 'compileShader', func: func1L0 },
10: { name: 'createProgram', func: funcC0 },
11: { name: 'deleteProgram', func: funcD0 },
12: { name: 'attachShader', func: func2L0L1 },
13: { name: 'bindAttribLocation', func: func3L0 },
14: { name: 'linkProgram', func: func1L0 },
15: { name: 'getProgramParameter', func: function() { assert(ctx.getProgramParameter(objects[buffer[i++]], buffer[i++]), 'we cannot handle errors, we are async proxied WebGL'); } },
16: { name: 'getUniformLocation', func: funcC2L0 },
17: { name: 'useProgram', func: func1L0 },
18: { name: 'uniform1i', func: func2L0 },
19: { name: 'uniform1f', func: func2L0 },
20: { name: 'uniform3fv', func: func2L0 },
21: { name: 'uniform4fv', func: func2L0 },
22: { name: 'uniformMatrix4fv', func: func3L0 },
23: { name: 'vertexAttrib4fv', func: func2 },
24: { name: 'createBuffer', func: funcC0 },
25: { name: 'deleteBuffer', func: funcD0 },
26: { name: 'bindBuffer', func: func2L1_ },
27: { name: 'bufferData', func: func3 },
28: { name: 'bufferSubData', func: func3 },
29: { name: 'viewport', func: func4 },
30: { name: 'vertexAttribPointer', func: func6 },
31: { name: 'enableVertexAttribArray', func: func1 },
32: { name: 'disableVertexAttribArray', func: func1 },
33: { name: 'drawArrays', func: func3 },
34: { name: 'drawElements', func: func4 },
35: { name: 'getError', func: function() { assert(ctx.getError() === ctx.NO_ERROR, 'we cannot handle errors, we are async proxied WebGL') } },
36: { name: 'createTexture', func: funcC0 },
37: { name: 'deleteTexture', func: funcD0 },
38: { name: 'bindTexture', func: func2L1_ },
39: { name: 'texParameteri', func: func3 },
40: { name: 'texImage2D', func: func9 },
41: { name: 'compressedTexImage2D', func: func7 },
42: { name: 'activeTexture', func: func1 },
43: { name: 'getShaderParameter', func: function() { assert(ctx.getShaderParameter(objects[buffer[i++]], buffer[i++]), 'we cannot handle errors, we are async proxied WebGL'); } },
44: { name: 'clearDepth', func: func1 },
45: { name: 'depthFunc', func: func1 },
46: { name: 'frontFace', func: func1 },
47: { name: 'cullFace', func: func1 },
48: { name: 'pixelStorei', func: func2 },
49: { name: 'depthMask', func: func1 },
50: { name: 'depthRange', func: func2 },
51: { name: 'blendFunc', func: func2 },
52: { name: 'scissor', func: func4 },
53: { name: 'colorMask', func: func4 },
54: { name: 'lineWidth', func: func1 },
55: { name: 'createFramebuffer', func: funcC0 },
56: { name: 'deleteFramebuffer', func: funcD0 },
57: { name: 'bindFramebuffer', func: func2L1_ },
58: { name: 'framebufferTexture2D', func: func5L3_ },
59: { name: 'createRenderbuffer', func: funcC0 },
60: { name: 'deleteRenderbuffer', func: funcD0 },
61: { name: 'bindRenderbuffer', func: func2L1_ },
62: { name: 'renderbufferStorage', func: func4 },
63: { name: 'framebufferRenderbuffer', func: func4L3_ },
64: { name: 'debugPrint', func: func1 },
};
function renderCommands(buf) {
ctx = Module.ctx;
i = 0;
buffer = buf;
var len = buffer.length;
//dump('issuing commands, buffer len: ' + len + '\n');
while (i < len) {
var info = calls[buffer[i++]];
var name = info.name;
assert(typeof name === 'string');
info.func(name);
//var err;
//while ((err = ctx.getError()) !== ctx.NO_ERROR) {
// dump('warning: GL error ' + err + ', after ' + [command, numArgs] + '\n');
//}
assert(i <= len);
}
}
var commandBuffers = [];
function renderAllCommands() {
// TODO: we can avoid running commands from buffers that are not the last, if they
// have no side effects, as each buffer is from a different frame
//if (commandBuffers.length > 1) dump('extra buffs: ' + (commandBuffers.length-1) + '\n');
for (var i = 0; i < commandBuffers.length; i++) {
renderCommands(commandBuffers[i]);
}
commandBuffers.length = 0;
}
this.onmessage = function(msg) {
//dump('client GL got ' + JSON.stringify(msg) + '\n');
switch(msg.op) {
case 'render': {
if (commandBuffers.length === 0) {
// requestion a new frame, we will clear the buffers after rendering them
window.requestAnimationFrame(renderAllCommands);
}
commandBuffers.push(msg.commandBuffer);
break;
}
default: throw 'weird gl onmessage ' + JSON.stringify(msg);
}
};
}
WebGLClient.prefetch = function() {
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('webgl-experimental') || canvas.getContext('webgl');
if (!ctx) return;
var parameters = {};
['MAX_VERTEX_ATTRIBS', 'MAX_TEXTURE_IMAGE_UNITS', 'MAX_TEXTURE_SIZE', 'MAX_CUBE_MAP_TEXTURE_SIZE', 'MAX_VERTEX_UNIFORM_VECTORS', 'MAX_FRAGMENT_UNIFORM_VECTORS', 'MAX_VARYING_VECTORS', 'MAX_COMBINED_TEXTURE_IMAGE_UNITS', 'VENDOR', 'RENDERER', 'VERSION'].forEach(function(name) {
parameters[ctx[name]] = ctx.getParameter(ctx[name]);
});
worker.postMessage({ target: 'gl', op: 'setPrefetched', parameters: parameters, extensions: ctx.getSupportedExtensions() });
};
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