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jasmine-opengl.js
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jasmine-opengl.js
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// This is an OpenGL implementation for SqueakJS using WebGL.
// It is very much incomplete and currently only implements
// the subset of OpenGL that is used by Croquet Jasmine,
// but could be extended to support more.
// The functions are invoked via FFI, which takes care of
// converting the arguments and return values between JS
// and Smalltalk.
// The OpenGL context is global and created by B3DAcceleratorPlugin.
// Context switching is done by B3DAcceleratorPlugin.makeCurrent().
// helpful constant lookup:
// https://javagl.github.io/GLConstantsTranslator/GLConstantsTranslator.html
// TODO
// [ ] implement draw arrays
// [X] implement draw elements
// [ ] implement vertex buffer objects
// [X] implement material + lighting
// [X] implement clip planes
// [ ] implement fog
// [ ] implement tex coord gen
// [ ] fix glBitmap for size other than 640x480 (also, make pixel perfect)
// [ ] optimize list compilation glBegin/glEnd
// [ ] implement light attenuation
// [ ] implement spot lights
// [ ] implement color material
// [ ] emulate glLineWidth (WebGL usually only supports 1px lines)
// e.g. using https://wwwtyro.net/2019/11/18/instanced-lines.html
// [ ] full OpenGL 1.0 support
// [ ] full OpenGL 1.1 support
// [ ] full OpenGL 1.2 support
// [ ] full OpenGL 1.3 support
// [ ] full OpenGL 1.4 support
// [ ] full OpenGL 1.5 support
// [ ] some extensions?
// OpenGL constants (many missing in WebGL)
var GL;
function OpenGL() {
"use strict";
var DEBUG = 0;
// 0 = off
// 1 = some (errors, warnings)
// 2 = lots (function calls)
// 3 = all (call details)
var identity = new Float32Array([
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1,
]);
// Primitive attributes for glBegin/glEnd
var flagCounter = 0;
var HAS_NORMAL = 1 << flagCounter++;
var HAS_COLOR = 1 << flagCounter++;
var HAS_TEXCOORD = 1 << flagCounter++;
// additional flags for selecting shader
var USE_TEXTURE = 1 << flagCounter++;
var USE_ALPHA_TEST = 1 << flagCounter++;
var USE_POINT_SIZE = 1 << flagCounter++;
var NUM_LIGHTS_MASK = (1 << flagCounter++) // 3 bits for number of lights (0-7)
+ (1 << flagCounter++)
+ (1 << flagCounter++);
var NUM_CLIP_PLANES_MASK = (1 << flagCounter++) // 3 bits for number of clip planes (0-5)
+ (1 << flagCounter++)
+ (1 << flagCounter++);
var FOG_MASK = (1 << flagCounter++) // 2 bits for fog mode (off, linear, exp, exp2)
+ (1 << flagCounter++);
// this math is silly but fun ...
var NUM_LIGHTS_SHIFT = Math.floor(Math.log2(NUM_LIGHTS_MASK)) - 2;
var MAX_LIGHTS = (NUM_LIGHTS_MASK >> NUM_LIGHTS_SHIFT) + 1;
var ANY_LIGHTS = (MAX_LIGHTS-1) << NUM_LIGHTS_SHIFT;
if (ANY_LIGHTS !== NUM_LIGHTS_MASK) throw Error("OpenGL: bad NUM_LIGHTS_MASK");
var NUM_CLIP_PLANES_SHIFT = Math.floor(Math.log2(NUM_CLIP_PLANES_MASK)) - 2;
var MAX_CLIP_PLANES = (NUM_CLIP_PLANES_MASK >> NUM_CLIP_PLANES_SHIFT) + 1;
var ANY_CLIP_PLANES = (MAX_CLIP_PLANES-1) << NUM_CLIP_PLANES_SHIFT;
if (ANY_CLIP_PLANES !== NUM_CLIP_PLANES_MASK) throw Error("OpenGL: bad NUM_CLIP_PLANES_MASK");
var FOG_SHIFT = Math.floor(Math.log2(FOG_MASK)) - 1;
var MAX_FOG = (FOG_MASK >> FOG_SHIFT) + 1;
var ANY_FOG = (MAX_FOG-1) << FOG_SHIFT;
if (ANY_FOG !== FOG_MASK) throw Error("OpenGL: bad ANY_FOG");
var NO_FOG = 0;
var LINEAR_FOG = 1;
var EXP_FOG = 2;
var EXP2_FOG = 3;
var gl; // the emulated OpenGL state
var webgl; // the actual WebGL context
return {
getModuleName: function() { return 'libGL.so (jasmine)'; },
setInterpreter: function(anInterpreterProxy) {
this.vm = anInterpreterProxy.vm;
return true;
},
ffiFunctionNotFoundHandler: function(name, args) {
this.vm.warnOnce("OpenGL: UNIMPLEMENTED (missing) " + name);
if (DEBUG > 0) debugger;
return null; // do not fail but return nil
},
initialiseModule: function() {
DEBUG > 1 && console.log("OpenGL: initialiseModule");
if (!GL) initGLConstants();
// connect to B3DAcceleratorPlugin to get WebGL context
var modules = SqueakJS.vm.primHandler.loadedModules;
var B3DAcceleratorPlugin = modules['B3DAcceleratorPlugin'];
if (!B3DAcceleratorPlugin) throw Error("OpenGL: B3DAcceleratorPlugin not loaded");
this.GL = GL;
B3DAcceleratorPlugin.setOpenGL(this); // will call makeCurrent()
},
makeCurrent: function(renderer) {
if (webgl === renderer.webgl) return; // already current
DEBUG > 1 && console.log("OpenGL: makeCurrent", renderer);
webgl = renderer.webgl;
gl = renderer.opengl;
if (!gl) renderer.opengl = this.initGL();
},
initGL: function() {
DEBUG > 0 && console.log("OpenGL: initGL");
// if webgl-lint is loaded, configure it
const ext = webgl.getExtension('GMAN_debug_helper');
if (ext) ext.setConfiguration({
throwOnError: false,
});
// if Spector script is loaded, capture WebGL calls
if (typeof SPECTOR !== "undefined") {
var spector = new SPECTOR.Spector();
spector.captureContext(webgl);
spector.displayUI();
}
// initialize emulated OpenGL state
gl = {
alphaTest: false,
alphaFunc: null,
alphaRef: 0,
extensions: "ARB_texture_non_power_of_two SGIS_generate_mipmap",
color: new Float32Array(4),
normal: new Float32Array([0, 0, 1]),
texCoord: new Float32Array(2),
primitive: null, // for glBegin/glEnd
primitiveAttrs: 0, // for glVertex
clipPlanes: [], // clip plane equations
clientState: {}, // enabled arrays by attr
fogMode: GL.EXP, // fog mode
fogEnabled: false, // fog enabled
fogDensity: 1, // fog density
fogStart: 0, // fog start
fogEnd: 1, // fog end
fogColor: new Float32Array([0, 0, 0, 0]), // fog color
fogHint: GL.DONT_CARE, // fog hint
shaders: {}, // shader programs by attr/flags
matrixMode: 0, // current matrix mode
matrices: {}, // matrix stacks by mode
matrix: null, // current matrix (matrices[mode][0])
lightingEnabled: false,
lights: [], // light states
lightModelAmbient: null, // scene ambient color
material: null, // material state
textureIdGen: 0, // texture id generator
textures: {}, // webgl texture objects by id
texture: null, // texture
textureEnabled: false, // texture enabled
textureEnvMode: GL.MODULATE, // texture environment mode
listIdGen: 0, // display list id generator
lists: {}, // display lists by id
list: null, // current display list
listMode: 0, // current display list mode
listBase: 0, // base for glCallLists
pixelStoreUnpackRowLength: 0,
pixelStoreUnpackSkipRows: 0,
pixelStoreUnpackSkipPixels: 0,
rasterPos: new Float32Array(4),
rasterColor: new Float32Array([1, 1, 1, 1]),
bitmapTexture: null, // texture for glBitmap
bitmapVertexBuffer: null, // vertex buffer for glBitmap
bitmapShader: { // shader program for glBitmap
program: null,
locations: {},
}, // shader for glBitmap
viewport: new Int32Array([0, 0, 0, 0]),
depthRange: new Float32Array([0, 1]),
};
// set initial state
gl.matrices[GL.MODELVIEW] = [new Float32Array(identity)];
gl.matrices[GL.PROJECTION] = [new Float32Array(identity)];
gl.matrixMode = GL.MODELVIEW;
gl.matrix = gl.matrices[gl.matrixMode][0];
gl.color.set([1, 1, 1, 1]);
for (var i = 0; i < MAX_CLIP_PLANES; i++) {
gl.clipPlanes[i] = {
enabled: false,
equation: new Float32Array([0, 0, 0, 0]),
};
}
for (var i = 0; i < MAX_LIGHTS; i++) {
gl.lights[i] = {
enabled: false,
ambient: new Float32Array([0, 0, 0, 1]),
diffuse: new Float32Array(i === 0 ? [1, 1, 1, 1] : [0, 0, 0, 1]),
specular: new Float32Array(i === 0 ? [1, 1, 1, 1] : [0, 0, 0, 1]),
position: new Float32Array([0, 0, 1, 0]),
};
}
gl.lightModelAmbient = new Float32Array([0.2, 0.2, 0.2, 1]);
gl.material = {
ambient: new Float32Array([0.2, 0.2, 0.2, 1]),
diffuse: new Float32Array([0.8, 0.8, 0.8, 1]),
specular: new Float32Array([0, 0, 0, 1]),
emission: new Float32Array([0, 0, 0, 1]),
shininess: 0,
};
var clientStates = ["vertexArray", "normalArray", "colorArray", "textureCoordArray"];
for (var i = 0; i < clientStates.length; i++) {
var attr = clientStates[i];
gl.clientState[attr] = {
enabled: false,
size: 0,
type: GL.FLOAT,
stride: 0,
pointer: null,
// binding: null, TODO: support VBOs
}
}
return gl;
},
destroyGL: function(renderer) {
DEBUG > 0 && console.log("OpenGL: destroyGL");
// TODO: delete textures, arrays, shaders?
renderer.opengl = null;
webgl = null;
gl = null;
},
// FFI functions get JS args, return JS result
addToList: function(name, args) {
if (!gl.list) return false;
gl.list.commands.push({name: name, args: args});
if (gl.listMode === GL.COMPILE) {
DEBUG > 1 && console.log("[COMPILE]", name, args);
return true;
}
return false;
},
glAlphaFunc: function(func, ref) {
if (gl.listMode && this.addToList("glAlphaFunc", [func, ref])) return;
DEBUG > 1 && console.log("glAlphaFunc", GL_Symbol(func), ref);
gl.alphaFunc = func;
gl.alphaRef = ref;
},
glBegin: function(mode) {
if (gl.listMode && this.addToList("glBegin", [mode])) return;
DEBUG > 1 && console.log("glBegin", GL_Symbol(mode, 'POINTS'));
gl.primitive = {
mode: mode,
vertices: [],
vertexSize: 0,
vertexAttrs: 0,
}
gl.primitiveAttrs = 0;
},
glBindTexture: function(target, texture) {
if (gl.listMode && this.addToList("glBindTexture", [target, texture])) return;
DEBUG > 1 && console.log("glBindTexture", GL_Symbol(target), texture);
var textureObj = gl.textures[texture];
if (!textureObj) throw Error("OpenGL: texture not found");
webgl.bindTexture(target, textureObj);
gl.texture = textureObj;
},
glBitmap: function(width, height, xorig, yorig, xmove, ymove, bitmap) {
// bitmap is supposed to be declared as "GLubyte*" per OpenGL spec,
// which the FFI would convert to Uint8Array for us. However, the
// image FFI declaration uses "void*", probably because it makes no
// difference in C, a pointer is a pointer. In JS, we get an
// ArrayBuffer for "void*" so we need to convert it to Uint8Array
// ourselves.
if (!bitmap.buffer) bitmap = new Uint8Array(bitmap);
if (gl.listMode && this.addToList("glBitmap", [width, height, xorig, yorig, xmove, ymove, bitmap])) return;
DEBUG > 1 && console.log("glBitmap", width, height, xorig, yorig, xmove, ymove, bitmap);
if (width > 0 && height > 0) {
// we need to convert the 1-bit deep bitmap to a 1-byte
// per pixel texture in ALPHA format, with the bitmap
// mapping 0-bits to transparent, 1-bits to opaque,
// and then draw it as a textured quad covering the viewport
var texels = new Uint8Array(width * height);
var bytesPerRow = Math.ceil(width / 32) * 4;
for (var y = 0; y < height; y++) {
var byteIndex = y * bytesPerRow;
var bitIndex = 7;
for (var x = 0; x < width; x++) {
var bit = bitmap[byteIndex] & (1 << bitIndex);
if (bit) texels[y * width + x] = 255;
bitIndex--;
if (bitIndex < 0) {
byteIndex++;
bitIndex = 7;
}
}
}
// debug: print bitmap
// s=''; for (y = height -1 ; y >= 0; y--) { for (x = 0; x < width; x++) s += texels[y * width + x] ? '⬛️' : '⬜️'; s+='\n'}; console.log(s)
var texture = gl.bitmapTexture;
if (!texture) {
texture = gl.bitmapTexture = webgl.createTexture();
webgl.bindTexture(webgl.TEXTURE_2D, texture);
webgl.texParameteri(webgl.TEXTURE_2D, webgl.TEXTURE_MIN_FILTER, webgl.LINEAR);
webgl.texParameteri(webgl.TEXTURE_2D, webgl.TEXTURE_MAG_FILTER, webgl.LINEAR);
webgl.texParameteri(webgl.TEXTURE_2D, webgl.TEXTURE_WRAP_S, webgl.CLAMP_TO_EDGE);
webgl.texParameteri(webgl.TEXTURE_2D, webgl.TEXTURE_WRAP_T, webgl.CLAMP_TO_EDGE);
} else {
webgl.bindTexture(webgl.TEXTURE_2D, texture);
}
webgl.pixelStorei(webgl.UNPACK_ALIGNMENT, 1);
webgl.texImage2D(webgl.TEXTURE_2D, 0, webgl.ALPHA, width, height, 0, webgl.ALPHA, webgl.UNSIGNED_BYTE, texels);
webgl.pixelStorei(webgl.UNPACK_ALIGNMENT, 4);
webgl.disable(webgl.CULL_FACE);
webgl.disable(webgl.DEPTH_TEST);
webgl.disable(webgl.BLEND);
webgl.colorMask(true, true, true, true);
webgl.viewport(0, 0, webgl.drawingBufferWidth, webgl.drawingBufferHeight);
var vertexBuffer = gl.bitmapVertexBuffer;
if (!vertexBuffer) {
var vertices = new Float32Array([
0, 0,
1, 0,
0, 1,
1, 1,
]);
vertexBuffer = gl.bitmapVertexBuffer = webgl.createBuffer();
webgl.bindBuffer(webgl.ARRAY_BUFFER, vertexBuffer);
webgl.bufferData(webgl.ARRAY_BUFFER, vertices, webgl.STATIC_DRAW);
} else {
webgl.bindBuffer(webgl.ARRAY_BUFFER, vertexBuffer);
}
var shader = gl.bitmapShader;
if (!shader.program) {
shader.program = webgl.createProgram();
var vs = webgl.createShader(webgl.VERTEX_SHADER);
webgl.shaderSource(vs, `
attribute vec2 a_position;
uniform vec3 u_raster;
uniform vec2 u_rasterOffset;
uniform vec2 u_rasterScale;
uniform vec2 u_translate;
uniform vec2 u_scale;
varying vec2 v_texcoord;
void main() {
vec2 raster = u_raster.xy * u_rasterScale + u_rasterOffset;
vec2 pos = (a_position + raster) * u_scale + u_translate;
gl_Position = vec4(pos, u_raster.z, 1);
v_texcoord = a_position;
}
`);
webgl.compileShader(vs);
if (!webgl.getShaderParameter(vs, webgl.COMPILE_STATUS)) {
console.error("OpenGL: vertex shader compile error: " + webgl.getShaderInfoLog(vs));
debugger;
return;
}
var fs = webgl.createShader(webgl.FRAGMENT_SHADER);
webgl.shaderSource(fs, `
precision mediump float;
uniform sampler2D u_texture;
uniform vec4 u_color;
varying vec2 v_texcoord;
void main() {
float alpha = texture2D(u_texture, v_texcoord).a;
if (alpha < 0.5) discard;
gl_FragColor = u_color;
}
`);
webgl.compileShader(fs);
if (!webgl.getShaderParameter(fs, webgl.COMPILE_STATUS)) {
console.error("OpenGL: fragment shader compile error: " + webgl.getShaderInfoLog(fs));
debugger;
return;
}
webgl.attachShader(shader.program, vs);
webgl.attachShader(shader.program, fs);
webgl.linkProgram(shader.program);
if (!webgl.getProgramParameter(shader.program, webgl.LINK_STATUS)) {
console.error("OpenGL: shader link error: " + webgl.getProgramInfoLog(shader.program));
debugger
return;
}
shader.locations = {
a_position: webgl.getAttribLocation(shader.program, "a_position"),
u_texture: webgl.getUniformLocation(shader.program, "u_texture"),
u_color: webgl.getUniformLocation(shader.program, "u_color"),
u_raster: webgl.getUniformLocation(shader.program, "u_raster"),
u_rasterOffset: webgl.getUniformLocation(shader.program, "u_rasterOffset"),
u_rasterScale: webgl.getUniformLocation(shader.program, "u_rasterScale"),
u_translate: webgl.getUniformLocation(shader.program, "u_translate"),
u_scale: webgl.getUniformLocation(shader.program, "u_scale"),
};
}
webgl.useProgram(shader.program);
webgl.enableVertexAttribArray(shader.locations.a_position);
webgl.vertexAttribPointer(shader.locations.a_position, 2, webgl.FLOAT, false, 0, 0);
webgl.uniform1i(shader.locations.u_texture, 0);
webgl.uniform4fv(shader.locations.u_color, gl.rasterColor);
// these seem to work for 640x480... I can't figure out the right transform yet
if (!this.bitmapScale) this.bitmapScale = [0.0311, 0.0419];
if (!this.bitmapTranslate) this.bitmapTranslate = [-1, -1];
if (!this.bitmapRasterOffset) this.bitmapRasterOffset = [0, 0];
if (!this.bitmapRasterScale) this.bitmapRasterScale = [0.1, 0.1];
// these properties allow intereactive debugging
webgl.uniform3f(shader.locations.u_raster, gl.rasterPos[0] + xorig, gl.rasterPos[1] + yorig, gl.rasterPos[2]);
webgl.uniform2fv(shader.locations.u_rasterOffset, this.bitmapRasterOffset);
webgl.uniform2fv(shader.locations.u_rasterScale, this.bitmapRasterScale);
webgl.uniform2fv(shader.locations.u_translate, this.bitmapTranslate);
webgl.uniform2fv(shader.locations.u_scale, this.bitmapScale);
webgl.drawArrays(webgl.TRIANGLE_STRIP, 0, 4);
webgl.disableVertexAttribArray(shader.locations.a_position);
webgl.bindBuffer(webgl.ARRAY_BUFFER, null);
webgl.useProgram(null);
webgl.bindTexture(webgl.TEXTURE_2D, null);
webgl.enable(webgl.CULL_FACE);
webgl.enable(webgl.DEPTH_TEST);
webgl.enable(webgl.BLEND);
}
gl.rasterPos[0] += xmove;
gl.rasterPos[1] += ymove;
},
glBlendFunc: function(sfactor, dfactor) {
if (gl.listMode && this.addToList("glBlendFunc", [sfactor, dfactor])) return;
DEBUG > 1 && console.log("glBlendFunc", GL_Symbol(sfactor), GL_Symbol(dfactor));
webgl.blendFunc(sfactor, dfactor);
},
glCallList: function(list) {
if (gl.listMode && this.addToList("glCallList", [list])) return;
DEBUG > 1 && console.log("glCallList", list, "START");
this.executeList(list);
DEBUG > 1 && console.log("glCallList", list, "DONE");
},
glCallLists: function(n, type, lists) {
if (gl.listMode && this.addToList("glCallLists", [n, type, lists])) return;
DEBUG > 1 && console.log("glCallLists", n, GL_Symbol(type), lists);
var array;
switch (type) {
case GL.BYTE:
array = new Int8Array(lists);
break;
case GL.UNSIGNED_BYTE:
array = new Uint8Array(lists);
break;
case GL.INT:
array = new Int32Array(lists);
break;
case GL.UNSIGNED_INT:
array = new Uint32Array(lists);
break;
default:
if (DEBUG) console.log("UNIMPLEMENTED glCallLists type", GL_Symbol(type))
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glCallLists type " + GL_Symbol(type));
return;
}
for (var i = 0; i < n; i++) {
var list = gl.listBase + array[i];
this.executeList(list);
}
},
glClear: function(mask) {
if (gl.listMode && this.addToList("glClear", [mask])) return;
var maskString = "";
if (mask & webgl.COLOR_BUFFER_BIT) maskString += " COLOR";
if (mask & webgl.DEPTH_BUFFER_BIT) maskString += " DEPTH";
if (mask & webgl.STENCIL_BUFFER_BIT) maskString += " STENCIL";
DEBUG > 1 && console.log("glClear"+ maskString);
webgl.clear(mask);
// B3DAcceleratorPlugin will call vm.breakNow()
// to emulate double buffering (which will return
// control to the browser which will flush the canvas).
// We discourage breaking until then to avoid flicker
// glClear is a good place for that since it's usually
// called at least once per frame
this.vm.breakAfter(500);
},
glClearColor: function(red, green, blue, alpha) {
if (gl.listMode && this.addToList("glClearColor", [red, green, blue, alpha])) return;
DEBUG > 1 && console.log("glClearColor", red, green, blue, alpha);
webgl.clearColor(red, green, blue, alpha);
},
glColor3f: function(red, green, blue) {
if (gl.listMode && this.addToList("glColor3f", [red, green, blue])) return;
DEBUG > 1 && console.log("glColor3f", red, green, blue);
gl.color[0] = red;
gl.color[1] = green;
gl.color[2] = blue;
gl.color[3] = 1;
gl.primitiveAttrs |= HAS_COLOR;
},
glColor3fv: function(v) {
if (gl.listMode && this.addToList("glColor3fv", [v.slice()])) return;
DEBUG > 1 && console.log("glColor3fv", Array.from(v));
gl.color.set(v);
gl.color[3] = 1;
gl.primitiveAttrs |= HAS_COLOR;
},
glColor4d: function(red, green, blue, alpha) {
if (gl.listMode && this.addToList("glColor4d", [red, green, blue, alpha])) return;
DEBUG > 1 && console.log("glColor4d", red, green, blue, alpha);
gl.color[0] = red;
gl.color[1] = green;
gl.color[2] = blue;
gl.color[3] = alpha;
gl.primitiveAttrs |= HAS_COLOR;
},
glColor4f: function(red, green, blue, alpha) {
if (gl.listMode && this.addToList("glColor4f", [red, green, blue, alpha])) return;
DEBUG > 1 && console.log("glColor4f", red, green, blue, alpha);
gl.color[0] = red;
gl.color[1] = green;
gl.color[2] = blue;
gl.color[3] = alpha;
gl.primitiveAttrs |= HAS_COLOR;
},
glColor4fv: function(v) {
if (gl.listMode && this.addToList("glColor4fv", [v.slice()])) return;
DEBUG > 1 && console.log("glColor4fv", Array.from(v));
gl.color.set(v);
gl.primitiveAttrs |= HAS_COLOR;
},
glColorPointer: function(size, type, stride, pointer) {
if (gl.listMode && this.addToList("glColorPointer", [size, type, stride, pointer])) return;
DEBUG > 1 && console.log("glColorPointer", size, GL_Symbol(type), stride, pointer);
gl.clientState.colorArray.size = size;
gl.clientState.colorArray.type = type;
gl.clientState.colorArray.stride = stride;
gl.clientState.colorArray.pointer = pointer;
},
glColorMask: function(red, green, blue, alpha) {
if (gl.listMode && this.addToList("glColorMask", [red, green, blue, alpha])) return;
DEBUG > 1 && console.log("glColorMask", red, green, blue, alpha);
webgl.colorMask(red, green, blue, alpha);
},
glClipPlane: function(plane, equation) {
if (gl.listMode && this.addToList("glClipPlane", [plane, equation])) return;
DEBUG > 1 && console.log("glClipPlane", GL_Symbol(plane), Array.from(equation));
var clipPlane = gl.clipPlanes[plane - GL.CLIP_PLANE0];
// multiply by inverse of modelview matrix
var m = new Float32Array(16);
invertMatrix(gl.matrices[GL.MODELVIEW][0], m);
transposeMatrix(m);
multVec4(m, equation, clipPlane.equation);
},
glDeleteLists: function(list, range) {
DEBUG > 1 && console.log("glDeleteLists", list, range);
for (var i = 0; i < range; i++) {
delete gl.lists[list + i];
}
},
glDeleteTextures: function(n, textures) {
DEBUG > 1 && console.log("glDeleteTextures", n, Array.from(textures));
for (var i = 0; i < n; i++) {
var id = textures[i];
var texture = gl.textures[id];
if (texture) {
webgl.deleteTexture(texture);
if (gl.texture === texture) gl.texture = null;
}
delete gl.textures[id];
}
},
glDepthFunc: function(func) {
if (gl.listMode && this.addToList("glDepthFunc", [func])) return;
DEBUG > 1 && console.log("glDepthFunc", GL_Symbol(func));
webgl.depthFunc(func);
},
glDepthMask: function(flag) {
if (gl.listMode && this.addToList("glDepthMask", [flag])) return;
DEBUG > 1 && console.log("glDepthMask", flag);
webgl.depthMask(flag);
},
glDepthRange: function(zNear, zFar) {
if (gl.listMode && this.addToList("glDepthRange", [zNear, zFar])) return;
DEBUG > 1 && console.log("glDepthRange", zNear, zFar);
webgl.depthRange(zNear, zFar);
},
glDisable: function(cap) {
if (gl.listMode && this.addToList("glDisable", [cap])) return;
switch (cap) {
case GL.ALPHA_TEST:
DEBUG > 1 && console.log("glDisable GL_ALPHA_TEST");
gl.alphaTest = false;
break;
case webgl.BLEND:
DEBUG > 1 && console.log("glDisable GL_BLEND");
webgl.disable(webgl.BLEND);
break;
case GL.CLIP_PLANE0:
case GL.CLIP_PLANE1:
case GL.CLIP_PLANE2:
case GL.CLIP_PLANE3:
case GL.CLIP_PLANE4:
case GL.CLIP_PLANE5:
case GL.CLIP_PLANE6:
case GL.CLIP_PLANE7:
DEBUG > 1 && console.log("glDisable GL_CLIP_PLANE" + (cap - GL.CLIP_PLANE0));
gl.clipPlanes[cap - GL.CLIP_PLANE0].enabled = false;
break;
case webgl.CULL_FACE:
DEBUG > 1 && console.log("glDisable GL.CULL_FACE");
webgl.disable(webgl.CULL_FACE);
break;
case webgl.DEPTH_TEST:
DEBUG > 1 && console.log("glDisable GL_DEPTH_TEST");
webgl.disable(webgl.DEPTH_TEST);
break;
case GL.FOG:
DEBUG > 1 && console.log("glDisable GL_FOG");
gl.fogEnabled = false;
break;
case GL.NORMALIZE:
DEBUG > 1 && console.log("glDisable GL_NORMALIZE");
// we always normalize normals
break;
case GL.LIGHT0:
case GL.LIGHT1:
case GL.LIGHT2:
case GL.LIGHT3:
case GL.LIGHT4:
case GL.LIGHT5:
case GL.LIGHT6:
case GL.LIGHT7:
DEBUG > 1 && console.log("glDisable GL_LIGHT" + (cap - GL.LIGHT0));
gl.lights[cap - GL.LIGHT0].enabled = false;
break;
case GL.LIGHTING:
DEBUG > 1 && console.log("glDisable GL_LIGHTING");
gl.lightingEnabled = false;
break;
case webgl.POLYGON_OFFSET_FILL:
DEBUG > 1 && console.log("glDisable GL_POLYGON_OFFSET_FILL");
webgl.disable(webgl.POLYGON_OFFSET_FILL);
break;
case webgl.STENCIL_TEST:
DEBUG > 1 && console.log("glDisable GL_STENCIL_TEST");
webgl.disable(webgl.STENCIL_TEST);
break;
case webgl.TEXTURE_2D:
DEBUG > 1 && console.log("glDisable GL_TEXTURE_2D");
gl.textureEnabled = false;
break;
case GL.TEXTURE_GEN_S:
case GL.TEXTURE_GEN_T:
case GL.TEXTURE_GEN_R:
case GL.TEXTURE_GEN_Q:
if (DEBUG) console.log("UNIMPLEMENTED glDisable GL_TEXTURE_GEN_" + (cap - GL.TEXTURE_GEN_S));
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glDisable GL_TEXTURE_GEN_" + (cap - GL.TEXTURE_GEN_S));
break;
default:
if (DEBUG) console.log("UNIMPLEMENTED glDisable", GL_Symbol(cap));
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glDisable " + GL_Symbol(cap));
}
},
glDisableClientState: function(cap) {
if (gl.listMode && this.addToList("glDisableClientState", [cap])) return;
switch (cap) {
case GL.VERTEX_ARRAY:
DEBUG > 1 && console.log("glDisableClientState GL_VERTEX_ARRAY");
gl.clientState.vertexArray.enabled = false;
return;
case GL.NORMAL_ARRAY:
DEBUG > 1 && console.log("glDisableClientState GL_NORMAL_ARRAY");
gl.clientState.normalArray.enabled = false;
return;
case GL.COLOR_ARRAY:
DEBUG > 1 && console.log("glDisableClientState GL_COLOR_ARRAY");
gl.clientState.colorArray.enabled = false;
return;
case GL.TEXTURE_COORD_ARRAY:
DEBUG > 1 && console.log("glDisableClientState GL_TEXTURE_COORD_ARRAY");
gl.clientState.textureCoordArray.enabled = false;
return;
default:
if (DEBUG) console.log("UNIMPLEMENTED glDisableClientState", GL_Symbol(cap));
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glDisableClientState " + GL_Symbol(cap));
}
},
glDrawElements: function(mode, count, type, indicesPtr) {
if (gl.listMode && this.addToList("glDrawElements", [mode, count, type, indicesPtr])) return;
var indices;
switch (type) {
case GL.UNSIGNED_BYTE:
indices = new Uint8Array(indicesPtr);
break;
case GL.UNSIGNED_SHORT:
indices = new Uint16Array(indicesPtr);
break;
case GL.UNSIGNED_INT:
// not directly supported by WebGL without OES_element_index_uint
var indices32 = new Uint32Array(indicesPtr);
var max = Math.max.apply(null, indices32);
if (max > 0xFFFF) console.warn("OpenGL: glDrawElements with indices > 65535 not supported, truncating", max);
if (max <= 0xFF) {
indices = new Uint8Array(indices32.length);
type = GL.UNSIGNED_BYTE;
} else {
indices = new Uint16Array(indices32.length);
type = GL.UNSIGNED_SHORT;
}
for (var i = 0; i < count; i++) indices[i] = indices32[i];
break;
default:
if (DEBUG) console.log("UNIMPLEMENTED glDrawElements type", GL_Symbol(type));
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glDrawElements type " + GL_Symbol(type));
return;
}
var geometryFlags = 0;
if (gl.clientState.normalArray.enabled) geometryFlags |= HAS_NORMAL;
if (gl.clientState.colorArray.enabled) geometryFlags |= HAS_COLOR;
if (gl.clientState.textureCoordArray.enabled) geometryFlags |= HAS_TEXCOORD;
if (mode === GL.POINTS) geometryFlags |= USE_POINT_SIZE;
var shader = this.getShader(geometryFlags);
if (!shader.program) {
if (DEBUG) console.warn("UNIMPLEMENTED glDrawElements shader: " + shader.label);
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glDrawElements shader: " + shader.label);
return;
}
var vertexArray = gl.clientState.vertexArray;
if (!vertexArray.enabled || !vertexArray.pointer) {
DEBUG > 0 && console.warn("glDrawElements: GL_VERTEX_ARRAY incomplete, skipping");
return;
}
DEBUG > 1 && console.log("glDrawElements", GL_Symbol(mode, 'POINTS'), count, GL_Symbol(type), shader.label, Array.from(indices));
webgl.useProgram(shader.program);
this.setShaderUniforms(shader);
var loc = shader.locations;
var vertexBuffer = webgl.createBuffer();
webgl.bindBuffer(webgl.ARRAY_BUFFER, vertexBuffer);
webgl.bufferData(webgl.ARRAY_BUFFER, vertexArray.pointer, webgl.DYNAMIC_DRAW);
webgl.vertexAttribPointer(loc['aPosition'], vertexArray.size, vertexArray.type, false, vertexArray.stride, 0);
webgl.enableVertexAttribArray(loc['aPosition']);
var normalBuffer;
if (loc['aNormal'] >= 0) {
var normalArray = gl.clientState.normalArray;
normalBuffer = webgl.createBuffer();
webgl.bindBuffer(webgl.ARRAY_BUFFER, normalBuffer);
webgl.bufferData(webgl.ARRAY_BUFFER, normalArray.pointer, webgl.DYNAMIC_DRAW);
webgl.vertexAttribPointer(loc['aNormal'], normalArray.size, normalArray.type, false, normalArray.stride, 0);
webgl.enableVertexAttribArray(loc['aNormal']);
}
var colorBuffer;
if (loc['aColor'] >= 0) {
var colorArray = gl.clientState.colorArray;
colorBuffer = webgl.createBuffer();
webgl.bindBuffer(webgl.ARRAY_BUFFER, colorBuffer);
webgl.bufferData(webgl.ARRAY_BUFFER, colorArray.pointer, webgl.DYNAMIC_DRAW);
webgl.vertexAttribPointer(loc['aColor'], colorArray.size, colorArray.type, false, colorArray.stride, 0);
webgl.enableVertexAttribArray(loc['aColor']);
}
var texCoordBuffer;
if (loc['aTexCoord'] >= 0) {
var texCoordArray = gl.clientState.textureCoordArray;
texCoordBuffer = webgl.createBuffer();
webgl.bindBuffer(webgl.ARRAY_BUFFER, texCoordBuffer);
webgl.bufferData(webgl.ARRAY_BUFFER, texCoordArray.pointer, webgl.DYNAMIC_DRAW);
webgl.vertexAttribPointer(loc['aTexCoord'], texCoordArray.size, texCoordArray.type, false, texCoordArray.stride, 0);
webgl.enableVertexAttribArray(loc['aTexCoord']);
}
var indexBuffer = webgl.createBuffer();
webgl.bindBuffer(webgl.ELEMENT_ARRAY_BUFFER, indexBuffer);
webgl.bufferData(webgl.ELEMENT_ARRAY_BUFFER, indices, webgl.DYNAMIC_DRAW);
webgl.drawElements(mode, indices.length, type, 0);
webgl.useProgram(null);
webgl.bindBuffer(webgl.ELEMENT_ARRAY_BUFFER, null);
webgl.bindBuffer(webgl.ARRAY_BUFFER, null);
webgl.deleteBuffer(indexBuffer);
webgl.disableVertexAttribArray(loc['aPosition']);
webgl.deleteBuffer(vertexBuffer);
if (normalBuffer) {
webgl.disableVertexAttribArray(loc['aNormal']);
webgl.deleteBuffer(normalBuffer);
}
if (colorBuffer) {
webgl.disableVertexAttribArray(loc['aColor']);
webgl.deleteBuffer(colorBuffer);
}
if (texCoordBuffer) {
webgl.disableVertexAttribArray(loc['aTexCoord']);
webgl.deleteBuffer(texCoordBuffer);
}
},
glEnable: function(cap) {
if (gl.listMode && this.addToList("glEnable", [cap])) return;
switch (cap) {
case GL.ALPHA_TEST:
DEBUG > 1 && console.log("glEnable GL_ALPHA_TEST");
gl.alphaTest = true;
break;
case webgl.BLEND:
DEBUG > 1 && console.log("glEnable GL_BLEND");
webgl.enable(webgl.BLEND);
break;
case GL.CLIP_PLANE0:
case GL.CLIP_PLANE1:
case GL.CLIP_PLANE2:
case GL.CLIP_PLANE3:
case GL.CLIP_PLANE4:
case GL.CLIP_PLANE5:
case GL.CLIP_PLANE6:
case GL.CLIP_PLANE7:
DEBUG > 1 && console.log("glEnable GL_CLIP_PLANE" + (cap - GL.CLIP_PLANE0));
gl.clipPlanes[cap - GL.CLIP_PLANE0].enabled = true;
break;
case webgl.CULL_FACE:
DEBUG > 1 && console.log("glEnable GL_CULL_FACE");
webgl.enable(webgl.CULL_FACE);
break;
case webgl.DEPTH_TEST:
DEBUG > 1 && console.log("glEnable GL_DEPTH_TEST");
webgl.enable(webgl.DEPTH_TEST);
break;
case GL.FOG:
DEBUG > 1 && console.log("glEnable GL_FOG");
gl.fogEnabled = true;
break;
case GL.NORMALIZE:
DEBUG > 1 && console.log("glEnable GL_NORMALIZE");
// we always normalize normals
break;
case GL.LIGHT0:
case GL.LIGHT1:
case GL.LIGHT2:
case GL.LIGHT3:
case GL.LIGHT4:
case GL.LIGHT5:
case GL.LIGHT6:
case GL.LIGHT7:
DEBUG > 1 && console.log("glEnable GL_LIGHT" + (cap - GL.LIGHT0));
gl.lights[cap - GL.LIGHT0].enabled = true;
break;
case GL.LIGHTING:
DEBUG > 1 && console.log("glEnable GL_LIGHTING");
gl.lightingEnabled = true;
break;
case webgl.POLYGON_OFFSET_FILL:
DEBUG > 1 && console.log("glEnable GL_POLYGON_OFFSET_FILL");
webgl.enable(webgl.POLYGON_OFFSET_FILL);
break;
case webgl.STENCIL_TEST:
DEBUG > 1 && console.log("glEnable GL_STENCIL_TEST");
webgl.enable(webgl.STENCIL_TEST);
break;
case webgl.TEXTURE_2D:
DEBUG > 1 && console.log("glEnable GL_TEXTURE_2D");
gl.textureEnabled = true;
break;
case GL.TEXTURE_GEN_S:
case GL.TEXTURE_GEN_T:
case GL.TEXTURE_GEN_R:
case GL.TEXTURE_GEN_Q:
if (DEBUG) console.log("UNIMPLEMENTED glEnable GL_" + GL_Symbol(cap, "TEXTURE_GEN_S"));
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glEnable GL_" + GL_Symbol(cap, "TEXTURE_GEN_S"));
break;
default:
if (DEBUG) console.log("UNIMPLEMENTED glEnable", GL_Symbol(cap));
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glEnable " + GL_Symbol(cap));
}
},
glEnableClientState: function(cap) {
if (gl.listMode && this.addToList("glEnableClientState", [cap])) return;
switch (cap) {
case GL.VERTEX_ARRAY:
DEBUG > 1 && console.log("glEnableClientState GL_VERTEX_ARRAY");
gl.clientState.vertexArray.enabled = true;
return;
case GL.NORMAL_ARRAY:
DEBUG > 1 && console.log("glEnableClientState GL_NORMAL_ARRAY");
gl.clientState.normalArray.enabled = true;
return;
case GL.COLOR_ARRAY:
DEBUG > 1 && console.log("glEnableClientState GL_COLOR_ARRAY");
gl.clientState.colorArray.enabled = true;
return;
case GL.TEXTURE_COORD_ARRAY:
DEBUG > 1 && console.log("glEnableClientState GL_TEXTURE_COORD_ARRAY");
gl.clientState.textureCoordArray.enabled = true;
return;
default:
if (DEBUG) console.log("UNIMPLEMENTED glEnableClientState", GL_Symbol(cap));
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glEnableClientState " + GL_Symbol(cap));
}
},
glFog: function(pname, param) {
if (gl.listMode && this.addToList("glFog", [pname, param])) return;
switch (pname) {
case GL.FOG_MODE:
gl.fogMode = param;
DEBUG > 1 && console.log("glFog GL_FOG_MODE", GL_Symbol(param));
break;
case GL.FOG_DENSITY:
DEBUG > 1 && console.log("glFog GL_FOG_DENSITY", param);
gl.fogDensity = param;
break;
case GL.FOG_START:
DEBUG > 1 && console.log("glFog GL_FOG_START", param);
gl.fogStart = param;
break;
case GL.FOG_END:
DEBUG > 1 && console.log("glFog GL_FOG_END", param);
gl.fogEnd = param;
break;
case GL.FOG_COLOR:
DEBUG > 1 && console.log("glFog GL_FOG_COLOR", Array.from(param));
gl.fogColor.set(param);
break;
default:
if (DEBUG) console.log("UNIMPLEMENTED glFog", GL_Symbol(pname), param);
else this.vm.warnOnce("OpenGL: UNIMPLEMENTED glFog " + GL_Symbol(pname));
}
},
glFogi: function(pname, param) {
this.glFog(pname, param);
},
glFogf: function(pname, param) {
this.glFog(pname, param);
},
glFogiv: function(pname, params) {
// FOG_COLOR integer values are mapped linearly such that the most positive representable value maps to 1.0,
// and the most negative representable value maps to -1.0
this.glFog(pname, pname === GL.FOG_COLOR
? params.map(function(x) { return (x + 0.5) / (0x7FFFFFFF + 0.5); })
: params[0]);
},
glFogfv: function(pname, params) {
this.glFog(pname, pname === GL.FOG_COLOR ? params : params[0]);
},
getShader: function(geometryFlags) {
// geometryFlags: HAS_TEXCOORD, HAS_NORMAL, HAS_COLOR, USE_POINT_SIZE
var shaderFlags = geometryFlags;
if (gl.textureEnabled && gl.texture) shaderFlags |= USE_TEXTURE;