update 0.7.0
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Rupert Hausberger
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032b58df5d
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245
sae/video.js
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245
sae/video.js
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/**************************************************************************
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* SAE - Scripted Amiga Emulator
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*
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* https://github.com/naTmeg/ScriptedAmigaEmulator
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*
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* ©2012 Rupert Hausberger
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* Commercial use is prohibited.
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*
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**************************************************************************/
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function Vide0() {
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const vertexShader =
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'attribute vec2 a_position;'+
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'attribute vec2 a_texCoord;'+
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'uniform vec2 u_resolution;'+
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'varying vec2 v_texCoord;'+
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'void main() {'+
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'vec2 zeroToOne = a_position / u_resolution;'+
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'vec2 zeroToTwo = zeroToOne * 2.0;'+
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'vec2 clipSpace = zeroToTwo - 1.0;'+
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'gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);'+
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'v_texCoord = a_texCoord;'+
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'}';
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const fragmentShader =
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'precision mediump float;'+
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'uniform sampler2D u_image;'+
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'varying vec2 v_texCoord;'+
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'void main() {'+
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'gl_FragColor = texture2D(u_image, v_texCoord);'+
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'}';
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const glParams = {
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alpha: false,
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stencil: false,
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antialias: false
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};
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var width = 0;
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var height = 0;
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var size = 0;
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var pixels = null;
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var div = null;
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var canvas = null;
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var gl = null;
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var video = null;
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var open = false;
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/*---------------------------------*/
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function getShader(gl, id) {
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var shader, source;
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if (id == 'vertex') {
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shader = gl.createShader(gl.VERTEX_SHADER);
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source = vertexShader;
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} else if (id == 'fragment') {
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shader = gl.createShader(gl.FRAGMENT_SHADER);
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source = fragmentShader;
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}
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gl.shaderSource(shader, source);
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gl.compileShader(shader);
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if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS))
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Fatal(SAEE_Video_Shader_Error, gl.getShaderInfoLog(shader));
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return shader;
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}
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function initGL() {
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var vertexShader = getShader(gl, 'vertex');
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var fragmentShader = getShader(gl, 'fragment');
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var program = gl.createProgram();
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gl.attachShader(program, vertexShader);
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gl.attachShader(program, fragmentShader);
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gl.linkProgram(program);
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if (!gl.getProgramParameter(program, gl.LINK_STATUS))
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Fatal(SAEE_Video_Shader_Error, 'Can\'t initialise the shaders for WebGL.');
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gl.useProgram(program);
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var positionLocation = gl.getAttribLocation(program, "a_position");
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var texCoordLocation = gl.getAttribLocation(program, "a_texCoord");
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var texCoordBuffer = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
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0.0, 0.0,
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1.0, 0.0,
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0.0, 1.0,
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0.0, 1.0,
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1.0, 0.0,
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1.0, 1.0]), gl.STATIC_DRAW);
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gl.enableVertexAttribArray(texCoordLocation);
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gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
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var texture = gl.createTexture();
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gl.bindTexture(gl.TEXTURE_2D, texture);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
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var resolutionLocation = gl.getUniformLocation(program, "u_resolution");
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gl.uniform2f(resolutionLocation, width, height);
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var buffer = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
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gl.enableVertexAttribArray(positionLocation);
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gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.viewport(0, 0, width, height);
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gl.clearColor(0, 0, 0, 1);
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gl.clear(gl.COLOR_BUFFER_BIT);
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gl.colorMask(true, true, true, false);
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}
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this.setup = function() {
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if (!AMIGA.config.video.enabled) return;
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if (open) this.cleanup();
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width = AMIGA.config.video.scale ? VIDEO_WIDTH << 1 : VIDEO_WIDTH;
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height = AMIGA.config.video.scale ? VIDEO_HEIGHT << 1 : VIDEO_WIDTH;
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size = width * height;
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//BUG.info('Video.init() %d x %d, %s mode', width, height, AMIGA.config.video.ntsc ? 'ntsc' : 'pal');
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div = document.getElementById(AMIGA.config.video.id);
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if (!div)
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Fatal(SAEE_Video_ID_Not_Found, 'Video DIV-element not found. Check your code. (Malformed-DIV-name: '+AMIGA.config.video.id+')');
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if ((canvas = document.createElement('canvas'))) {
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canvas.width = width;
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canvas.height = height;
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} else {
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if (confirm('Can\'t create a CANVAS-element. Continue without video-playback?'))
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AMIGA.config.video.enabled = false;
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else
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Fatal(SAEE_Video_Canvas_Not_Supported, 'Can\'t create a CANVAS-element. Please update the browser.');
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}
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if (AMIGA.config.video.enabled) {
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if ((gl = canvas.getContext('experimental-webgl', glParams) || canvas.getContext('webgl', glParams)))
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initGL();
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else
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if (confirm('Can\'t initialise WebGL. Continue without video-playback?'))
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AMIGA.config.video.enabled = false;
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else
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Fatal(SAEE_Video_WebGL_Not_Avail, 'Can\'t initialise WebGL. Is WebGL enabled in the browser-config?');
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}
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if (AMIGA.config.video.enabled) {
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pixels = new Uint16Array(size);
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for (var i = 0; i < size; i++) pixels[i] = 0;
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}
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if (AMIGA.config.ports[0].type == SAEV_Config_Ports_Type_Mouse) {
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canvas.onmousedown = function(e) { AMIGA.input.mouse.mousedown(e); }
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canvas.onmouseup = function(e) { AMIGA.input.mouse.mouseup(e); }
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canvas.onmouseover = function(e) { AMIGA.input.mouse.mouseover(e); }
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canvas.onmouseout = function(e) { AMIGA.input.mouse.mouseout(e); }
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canvas.onmousemove = function(e) { AMIGA.input.mouse.mousemove(e); }
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}
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canvas.oncontextmenu = function() { return false; }
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video = document.createElement('div');
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video.style.width = width + 'px';
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video.style.height = height + 'px';
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video.style.margin = 'auto';
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video.style.webkitTouchCallout = 'none';
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video.style.webkitUserSelect = 'none';
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video.style.khtmlUserSelect = 'none';
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video.style.mozUserSelect = 'none';
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video.style.msUserSelect = 'none';
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video.style.userSelect = 'none';
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video.appendChild(canvas);
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div.appendChild(video);
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open = true;
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}
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this.cleanup = function() {
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if (open) {
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div.removeChild(video);
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canvas = null;
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pixels = null;
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video = null;
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open = false;
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}
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}
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/*---------------------------------*/
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this.hideCursor = function(hide) {
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canvas.style.cursor = hide ? 'none' : 'auto';
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}
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this.clear_pixels = function () {
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for (var i = 0; i < size; i++)
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pixels[i] = 0;
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}
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this.drawpixel = function (x, y, rgb) {
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pixels[y * width + x] = rgb;
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}
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this.draw2pixel = function (x, y, rgb) {
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var ptr = y * width + x;
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pixels[ptr] = pixels[ptr + 1] = rgb;
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}
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this.drawline = function (y, rgb) {
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var ptr = y * width;
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for (var i = 0; i < width; i++)
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pixels[ptr++] = rgb;
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}
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this.drawline_from_to = function (x1, x2, y, rgb) {
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var ptr = y * width + x1;
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for (var i = 0; i < x2 - x1; i++)
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pixels[ptr++] = rgb;
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}
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this.draw = function (rgb, scalex, scaley, colorOnly) {
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var r = 0.0625 * (((rgb >> 11) & 31) >> 1);
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var g = 0.0625 * (((rgb >> 5) & 63) >> 2);
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var b = 0.0625 * ((rgb & 31) >> 1);
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gl.viewport(0, 0, width, height);
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gl.clearColor(r, g, b, 1);
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gl.clear(gl.COLOR_BUFFER_BIT);
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if (!colorOnly) {
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gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, width, height, 0, gl.RGB, gl.UNSIGNED_SHORT_5_6_5, pixels);
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var s = AMIGA.config.video.scale ? 1 : 0;
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var x1 = 0;
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//var x2 = 0 + (width << (scalex ? (s+1) : s));
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var x2 = 0 + (width << s);
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var y1 = 0;
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var y2 = 0 + (height << (scaley ? (s+1) : s));
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//var y2 = 0 + (height << s);
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gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
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x1, y1, x2, y1, x1, y2,
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x1, y2, x2, y1, x2, y2]), gl.STATIC_DRAW);
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gl.drawArrays(gl.TRIANGLES, 0, 6);
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}
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}
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}
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