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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
define([
'console',
'mojo/apps/js/bindings/connector',
'mojo/apps/js/bindings/core',
'mojo/apps/js/bindings/gl',
'mojo/apps/js/bindings/threading',
'mojom/native_viewport',
'mojom/gles2',
'mojom/shell',
], function(console,
connector,
core,
gljs,
threading,
nativeViewport,
gles2,
shell) {
const VERTEX_SHADER_SOURCE = [
'uniform mat4 u_mvpMatrix;',
'attribute vec4 a_position;',
'void main()',
'{',
' gl_Position = u_mvpMatrix * a_position;',
'}'
].join('\n');
const FRAGMENT_SHADER_SOURCE = [
'precision mediump float;',
'void main()',
'{',
' gl_FragColor = vec4( 0.0, 1.0, 0.0, 1.0 );',
'}'
].join('\n');
function ESMatrix() {
this.m = new Float32Array(16);
}
ESMatrix.prototype.loadZero = function() {
for (var i = 0; i < this.m.length; i++) {
this.m[i] = 0;
}
};
ESMatrix.prototype.loadIdentity = function() {
this.loadZero();
for (var i = 0; i < 4; i++) {
this.m[i*4+i] = 1;
}
};
function loadProgram(gl) {
var vertexShader = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(vertexShader, VERTEX_SHADER_SOURCE);
gl.compileShader(vertexShader);
var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(fragmentShader, FRAGMENT_SHADER_SOURCE);
gl.compileShader(fragmentShader);
var program = gl.createProgram();
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
// TODO(aa): Check for errors using getProgramiv and LINK_STATUS.
gl.deleteShader(vertexShader);
gl.deleteShader(fragmentShader);
return program;
}
var vboVertices;
var vboIndices;
function generateCube(gl) {
var numVertices = 24 * 3;
var numIndices = 12 * 3;
var cubeVertices = new Float32Array([
-0.5, -0.5, -0.5,
-0.5, -0.5, 0.5,
0.5, -0.5, 0.5,
0.5, -0.5, -0.5,
-0.5, 0.5, -0.5,
-0.5, 0.5, 0.5,
0.5, 0.5, 0.5,
0.5, 0.5, -0.5,
-0.5, -0.5, -0.5,
-0.5, 0.5, -0.5,
0.5, 0.5, -0.5,
0.5, -0.5, -0.5,
-0.5, -0.5, 0.5,
-0.5, 0.5, 0.5,
0.5, 0.5, 0.5,
0.5, -0.5, 0.5,
-0.5, -0.5, -0.5,
-0.5, -0.5, 0.5,
-0.5, 0.5, 0.5,
-0.5, 0.5, -0.5,
0.5, -0.5, -0.5,
0.5, -0.5, 0.5,
0.5, 0.5, 0.5,
0.5, 0.5, -0.5
]);
var cubeIndices = new Uint16Array([
0, 2, 1,
0, 3, 2,
4, 5, 6,
4, 6, 7,
8, 9, 10,
8, 10, 11,
12, 15, 14,
12, 14, 13,
16, 17, 18,
16, 18, 19,
20, 23, 22,
20, 22, 21
]);
// TODO(aa): The C++ program branches here on whether the pointer is
// non-NULL.
vboVertices = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vboVertices);
gl.bufferData(gl.ARRAY_BUFFER, cubeVertices, gl.STATIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, 0);
vboIndices = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vboIndices);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, cubeIndices, gl.STATIC_DRAW);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, 0);
return cubeIndices.length;
}
function drawCube(gl, width, height, program, positionLocation, mvpLocation,
numIndices, mvpMatrix) {
gl.viewport(0, 0, width, height);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.useProgram(program);
gl.bindBuffer(gl.ARRAY_BUFFER, vboVertices);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vboIndices);
gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 12, 0);
gl.enableVertexAttribArray(positionLocation);
gl.uniformMatrix4fv(mvpLocation, false, mvpMatrix.m);
gl.drawElements(gl.TRIANGLES, numIndices, gl.UNSIGNED_SHORT, 0);
}
function SampleApp(shell) {
this.shell_ = shell;
var pipe = new core.createMessagePipe();
new connector.Connection(pipe.handle0, NativeViewportClientImpl,
nativeViewport.NativeViewportProxy);
this.shell_.connect('mojo:mojo_native_viewport_service', pipe.handle1);
}
// TODO(aa): It is a bummer to need this stub object in JavaScript. We should
// have a 'client' object that contains both the sending and receiving bits of
// the client side of the interface. Since JS is loosely typed, we do not need
// a separate base class to inherit from to receive callbacks.
SampleApp.prototype = Object.create(shell.ShellClientStub.prototype);
function NativeViewportClientImpl(remote) {
this.remote_ = remote;
var pipe = core.createMessagePipe();
new connector.Connection(pipe.handle0, GLES2ClientImpl, gles2.GLES2Proxy);
this.remote_.open();
this.remote_.createGLES2Context(pipe.handle1);
}
NativeViewportClientImpl.prototype =
Object.create(nativeViewport.NativeViewportClientStub.prototype);
NativeViewportClientImpl.prototype.onCreated = function() {
console.log(['NativeViewportClientImpl.prototype.OnCreated']);
};
NativeViewportClientImpl.prototype.didOpen = function() {
console.log(['NativeViewportClientImpl.prototype.DidOpen']);
};
function GLES2ClientImpl(remote) {
this.remote_ = remote;
}
GLES2ClientImpl.prototype =
Object.create(gles2.GLES2ClientStub.prototype);
GLES2ClientImpl.prototype.didCreateContext = function(encoded,
width,
height) {
var gl = new gljs.Context(encoded, width, height);
var program = loadProgram(gl);
var positionLocation = gl.getAttribLocation(program, 'a_position');
var mvpLocation = gl.getUniformLocation(program, 'u_mvpMatrix');
var numIndices = generateCube(gl);
var mvpMatrix = new ESMatrix();
gl.clearColor(0, 0, 0, 0);
mvpMatrix.loadIdentity();
drawCube(gl, width, height, program, positionLocation, mvpLocation,
numIndices, mvpMatrix);
gl.swapBuffers();
};
GLES2ClientImpl.prototype.contextLost = function() {
console.log(['GLES2ClientImpl.prototype.contextLost']);
};
return function(handle) {
new connector.Connection(handle, SampleApp, shell.ShellProxy);
};
});
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