webglimpse
Version:
Webglimpse is a data visualization library for the web.
181 lines • 41.7 kB
JavaScript
/*
* Copyright (c) 2014, Metron, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import { GL, concatLines, getObjectId, hasval } from './util/util';
import { Program, Uniform2f, Uniform1f, UniformSampler2D, Attribute } from './shader';
import { newStaticBuffer } from './buffer';
import { nearestPixel } from './misc';
class TextureEntry {
constructor(gl, target, texture) {
this.gl = gl;
this.target = target;
this.texture = texture;
this.textureUnit = -1;
}
}
export class Texture {
constructor(helper) {
this.helper = helper;
this.textures = {};
}
bind(gl, textureUnit) {
const glId = getObjectId(gl);
if (hasval(this.textures[glId])) {
const en = this.textures[glId];
gl.activeTexture(GL.TEXTURE0 + textureUnit);
gl.bindTexture(en.target, en.texture);
en.textureUnit = textureUnit;
}
else {
const target = this.helper.target(gl);
const texture = gl.createTexture();
if (!hasval(texture)) {
throw new Error('Failed to create texture');
}
this.textures[glId] = new TextureEntry(gl, target, texture);
const en = this.textures[glId];
gl.activeTexture(GL.TEXTURE0 + textureUnit);
gl.bindTexture(en.target, en.texture);
en.textureUnit = textureUnit;
this.helper.init(gl, target);
}
}
unbind(gl) {
const glId = getObjectId(gl);
if (hasval(this.textures[glId])) {
const en = this.textures[glId];
gl.activeTexture(GL.TEXTURE0 + en.textureUnit);
gl.bindTexture(en.target, null);
en.textureUnit = -1;
}
}
dispose() {
// XXX: Not sure this actually works ... may have to make each gl current or something
for (const glid in this.textures) {
if (this.textures.hasOwnProperty(glid)) {
const en = this.textures[glid];
en.gl.deleteTexture(en.texture);
}
}
this.textures = {};
}
}
export class FloatDataTexture2D extends Texture {
constructor(w, h, array) {
super({
target: function (gl) {
return GL.TEXTURE_2D;
},
init: function (gl, target) {
if (!gl.getExtension('OES_texture_float')) {
throw new Error('OES_texture_float extension is required');
}
gl.texParameteri(target, GL.TEXTURE_MAG_FILTER, GL.NEAREST);
gl.texParameteri(target, GL.TEXTURE_MIN_FILTER, GL.NEAREST);
gl.texParameteri(target, GL.TEXTURE_WRAP_S, GL.CLAMP_TO_EDGE);
gl.texParameteri(target, GL.TEXTURE_WRAP_T, GL.CLAMP_TO_EDGE);
// GL.LUMINANCE isn't supported with GL.FLOAT
gl.texImage2D(target, 0, GL.RGBA, w, h, 0, GL.RGBA, GL.FLOAT, array);
}
});
this._w = w;
this._h = h;
}
get w() { return this._w; }
get h() { return this._h; }
}
export class Texture2D extends Texture {
constructor(w, h, minFilter, magFilter, draw) {
const canvas = document.createElement('canvas');
canvas.width = w;
canvas.height = h;
draw(canvas.getContext('2d'));
super({
target: function (gl) {
return GL.TEXTURE_2D;
},
init: function (gl, target) {
gl.texParameteri(target, GL.TEXTURE_MAG_FILTER, magFilter);
gl.texParameteri(target, GL.TEXTURE_MIN_FILTER, minFilter);
gl.texParameteri(target, GL.TEXTURE_WRAP_S, GL.CLAMP_TO_EDGE);
gl.texParameteri(target, GL.TEXTURE_WRAP_T, GL.CLAMP_TO_EDGE);
gl.texImage2D(target, 0, GL.RGBA, GL.RGBA, GL.UNSIGNED_BYTE, canvas);
}
});
this._w = w;
this._h = h;
}
get w() { return this._w; }
get h() { return this._h; }
}
export class TextureRenderer {
constructor() {
this.textureRenderer_VERTSHADER = concatLines(' ', ' uniform vec2 u_XyFrac; ', ' uniform vec2 u_Anchor; ', ' uniform float u_Rotation_CCWRAD; ', ' uniform vec2 u_ImageSize; ', ' uniform vec2 u_ViewportSize; ', ' ', ' attribute vec2 a_ImageFrac; ', ' ', ' varying vec2 v_StCoord; ', ' ', ' void main( ) { ', ' float cosRot = cos( u_Rotation_CCWRAD ); ', ' float sinRot = sin( u_Rotation_CCWRAD ); ', ' ', ' // Column major ', ' mat2 rotation = mat2( cosRot, sinRot, ', ' -sinRot, cosRot ); ', ' ', ' vec2 xy = -1.0 + 2.0*( u_XyFrac + rotation*( u_ImageSize*( a_ImageFrac - u_Anchor ) ) / u_ViewportSize ); ', ' gl_Position = vec4( xy, 0.0, 1.0 ); ', ' ', ' v_StCoord = vec2( a_ImageFrac.x, 1.0 - a_ImageFrac.y ); ', ' } ', ' ');
this.textureRenderer_FRAGSHADER = concatLines(' ', ' precision mediump float; ', ' ', ' uniform sampler2D u_Sampler; ', ' ', ' varying vec2 v_StCoord; ', ' ', ' void main( ) { ', ' gl_FragColor = texture2D( u_Sampler, v_StCoord ); ', ' } ', ' ');
this.program = new Program(this.textureRenderer_VERTSHADER, this.textureRenderer_FRAGSHADER);
this.u_XyFrac = new Uniform2f(this.program, 'u_XyFrac');
this.u_Anchor = new Uniform2f(this.program, 'u_Anchor');
this.u_Rotation_CCWRAD = new Uniform1f(this.program, 'u_Rotation_CCWRAD');
this.u_ImageSize = new Uniform2f(this.program, 'u_ImageSize');
this.u_ViewportSize = new Uniform2f(this.program, 'u_ViewportSize');
this.u_Sampler = new UniformSampler2D(this.program, 'u_Sampler');
this.a_ImageFrac = new Attribute(this.program, 'a_ImageFrac');
this.imageFracData = newStaticBuffer(new Float32Array([0.0, 0.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0]));
this.wViewport = 0;
this.hViewport = 0;
}
begin(gl, viewport) {
gl.blendFuncSeparate(GL.SRC_ALPHA, GL.ONE_MINUS_SRC_ALPHA, GL.ONE, GL.ONE_MINUS_SRC_ALPHA);
gl.enable(GL.BLEND);
this.program.use(gl);
this.u_ViewportSize.setData(gl, viewport.w, viewport.h);
this.a_ImageFrac.setDataAndEnable(gl, this.imageFracData, 2, GL.FLOAT);
this.wViewport = viewport.w;
this.hViewport = viewport.h;
}
draw(gl, texture, xFrac, yFrac, options) {
const xAnchor = (hasval(options) && hasval(options.xAnchor) ? options.xAnchor : 0.5);
const yAnchor = (hasval(options) && hasval(options.yAnchor) ? options.yAnchor : 0.5);
const rotation_CCWRAD = (hasval(options) && hasval(options.rotation_CCWRAD) ? options.rotation_CCWRAD : 0);
const width = (hasval(options) && hasval(options.width) ? options.width : texture.w);
const height = (hasval(options) && hasval(options.height) ? options.height : texture.h);
this.u_XyFrac.setData(gl, nearestPixel(xFrac, this.wViewport, xAnchor, texture.w), nearestPixel(yFrac, this.hViewport, yAnchor, texture.h));
this.u_Anchor.setData(gl, xAnchor, yAnchor);
this.u_Rotation_CCWRAD.setData(gl, rotation_CCWRAD);
this.u_ImageSize.setData(gl, width, height);
this.u_Sampler.setDataAndBind(gl, 0, texture);
gl.drawArrays(GL.TRIANGLE_STRIP, 0, 4);
}
end(gl) {
this.a_ImageFrac.disable(gl);
this.u_Sampler.unbind(gl);
this.program.endUse(gl);
}
}
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* Copyright (c) 2014, Metron, Inc.\r\n * All rights reserved.\r\n *\r\n * Redistribution and use in source and binary forms, with or without modification,\r\n * are permitted provided that the following conditions are met:\r\n *\r\n * 1. Redistributions of source code must retain the above copyright notice, this\r\n *    list of conditions and the following disclaimer.\r\n *\r\n * 2. Redistributions in binary form must reproduce the above copyright notice,\r\n *    this list of conditions and the following disclaimer in the documentation\r\n *    and/or other materials provided with the distribution.\r\n *\r\n * 3. Neither the name of the copyright holder nor the names of its contributors\r\n *    may be used to endorse or promote products derived from this software without\r\n *    specific prior written permission.\r\n *\r\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND\r\n * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\r\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r\n * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR\r\n * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\r\n * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r\n * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON\r\n * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r\n * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\r\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r\n */\r\nimport { StringMap, GL, concatLines, getObjectId, hasval } from './util/util';\r\nimport { Program, Uniform2f, Uniform1f, UniformSampler2D, Attribute } from './shader';\r\nimport { Buffer, newStaticBuffer } from './buffer';\r\nimport { BoundsUnmodifiable } from './bounds';\r\nimport { nearestPixel } from './misc';\r\n\r\nclass TextureEntry {\r\n    gl: WebGLRenderingContext;\r\n    target: number;\r\n    texture: WebGLTexture;\r\n    textureUnit: number;\r\n\r\n    constructor(gl: WebGLRenderingContext, target: number, texture: WebGLTexture) {\r\n        this.gl = gl;\r\n        this.target = target;\r\n        this.texture = texture;\r\n        this.textureUnit = -1;\r\n    }\r\n}\r\n\r\n\r\nexport interface TextureHelper {\r\n    target(gl: WebGLRenderingContext): number;\r\n    init(gl: WebGLRenderingContext, target: number): void;\r\n}\r\n\r\n\r\nexport class Texture {\r\n    private helper: TextureHelper;\r\n    private textures: StringMap<TextureEntry>;\r\n\r\n    constructor(helper: TextureHelper) {\r\n        this.helper = helper;\r\n        this.textures = {};\r\n    }\r\n\r\n    bind(gl: WebGLRenderingContext, textureUnit: number) {\r\n        const glId = getObjectId(gl);\r\n        if (hasval(this.textures[glId])) {\r\n            const en = this.textures[glId];\r\n            gl.activeTexture(GL.TEXTURE0 + textureUnit);\r\n            gl.bindTexture(en.target, en.texture);\r\n            en.textureUnit = textureUnit;\r\n        }\r\n        else {\r\n            const target = this.helper.target(gl);\r\n            const texture = gl.createTexture();\r\n            if (!hasval(texture)) {\r\n                throw new Error('Failed to create texture');\r\n            }\r\n            this.textures[glId] = new TextureEntry(gl, target, texture);\r\n\r\n            const en = this.textures[glId];\r\n            gl.activeTexture(GL.TEXTURE0 + textureUnit);\r\n            gl.bindTexture(en.target, en.texture);\r\n            en.textureUnit = textureUnit;\r\n\r\n            this.helper.init(gl, target);\r\n        }\r\n    }\r\n\r\n    unbind(gl: WebGLRenderingContext) {\r\n        const glId = getObjectId(gl);\r\n        if (hasval(this.textures[glId])) {\r\n            const en = this.textures[glId];\r\n            gl.activeTexture(GL.TEXTURE0 + en.textureUnit);\r\n            gl.bindTexture(en.target, null);\r\n            en.textureUnit = -1;\r\n        }\r\n    }\r\n\r\n    dispose() {\r\n        // XXX: Not sure this actually works ... may have to make each gl current or something\r\n        for (const glid in this.textures) {\r\n            if (this.textures.hasOwnProperty(glid)) {\r\n                const en = this.textures[glid];\r\n                en.gl.deleteTexture(en.texture);\r\n            }\r\n        }\r\n        this.textures = {};\r\n    }\r\n}\r\n\r\n\r\nexport type ImageDrawer = (context: CanvasRenderingContext2D) => void;\r\n\r\nexport class FloatDataTexture2D extends Texture {\r\n    private _w: number;\r\n    private _h: number;\r\n\r\n    get w(): number { return this._w; }\r\n    get h(): number { return this._h; }\r\n\r\n    constructor(w: number, h: number, array: Float32Array) {\r\n        super({\r\n            target: function (gl: WebGLRenderingContext): number {\r\n                return GL.TEXTURE_2D;\r\n            },\r\n            init: function (gl: WebGLRenderingContext, target: number) {\r\n\r\n                if (!gl.getExtension('OES_texture_float')) {\r\n                    throw new Error('OES_texture_float extension is required');\r\n                }\r\n\r\n                gl.texParameteri(target, GL.TEXTURE_MAG_FILTER, GL.NEAREST);\r\n                gl.texParameteri(target, GL.TEXTURE_MIN_FILTER, GL.NEAREST);\r\n                gl.texParameteri(target, GL.TEXTURE_WRAP_S, GL.CLAMP_TO_EDGE);\r\n                gl.texParameteri(target, GL.TEXTURE_WRAP_T, GL.CLAMP_TO_EDGE);\r\n\r\n                // GL.LUMINANCE isn't supported with GL.FLOAT\r\n                gl.texImage2D(target, 0, GL.RGBA, w, h, 0, GL.RGBA, GL.FLOAT, array);\r\n            }\r\n        });\r\n\r\n        this._w = w;\r\n        this._h = h;\r\n    }\r\n}\r\n\r\nexport class Texture2D extends Texture {\r\n    private _w: number;\r\n    private _h: number;\r\n\r\n    get w(): number { return this._w; }\r\n    get h(): number { return this._h; }\r\n\r\n    constructor(w: number, h: number, minFilter: number, magFilter: number, draw: ImageDrawer) {\r\n        const canvas = document.createElement('canvas');\r\n        canvas.width = w;\r\n        canvas.height = h;\r\n        draw(canvas.getContext('2d'));\r\n\r\n        super({\r\n            target: function (gl: WebGLRenderingContext): number {\r\n                return GL.TEXTURE_2D;\r\n            },\r\n            init: function (gl: WebGLRenderingContext, target: number) {\r\n                gl.texParameteri(target, GL.TEXTURE_MAG_FILTER, magFilter);\r\n                gl.texParameteri(target, GL.TEXTURE_MIN_FILTER, minFilter);\r\n                gl.texParameteri(target, GL.TEXTURE_WRAP_S, GL.CLAMP_TO_EDGE);\r\n                gl.texParameteri(target, GL.TEXTURE_WRAP_T, GL.CLAMP_TO_EDGE);\r\n                gl.texImage2D(target, 0, GL.RGBA, GL.RGBA, GL.UNSIGNED_BYTE, canvas);\r\n            }\r\n        });\r\n\r\n        this._w = w;\r\n        this._h = h;\r\n    }\r\n}\r\n\r\n\r\nexport interface TextureDrawOptions {\r\n    xAnchor?: number;\r\n    yAnchor?: number;\r\n    rotation_CCWRAD?: number;\r\n    width?: number;\r\n    height?: number;\r\n}\r\n\r\n\r\nexport class TextureRenderer {\r\n\r\n    private textureRenderer_VERTSHADER = concatLines(\r\n        '                                                                                                                 ',\r\n        '  uniform vec2 u_XyFrac;                                                                                         ',\r\n        '  uniform vec2 u_Anchor;                                                                                         ',\r\n        '  uniform float u_Rotation_CCWRAD;                                                                               ',\r\n        '  uniform vec2 u_ImageSize;                                                                                      ',\r\n        '  uniform vec2 u_ViewportSize;                                                                                   ',\r\n        '                                                                                                                 ',\r\n        '  attribute vec2 a_ImageFrac;                                                                                    ',\r\n        '                                                                                                                 ',\r\n        '  varying vec2 v_StCoord;                                                                                        ',\r\n        '                                                                                                                 ',\r\n        '  void main( ) {                                                                                                 ',\r\n        '      float cosRot = cos( u_Rotation_CCWRAD );                                                                   ',\r\n        '      float sinRot = sin( u_Rotation_CCWRAD );                                                                   ',\r\n        '                                                                                                                 ',\r\n        '      // Column major                                                                                            ',\r\n        '      mat2 rotation = mat2( cosRot, sinRot,                                                                      ',\r\n        '                           -sinRot, cosRot );                                                                    ',\r\n        '                                                                                                                 ',\r\n        '      vec2 xy = -1.0 + 2.0*( u_XyFrac + rotation*( u_ImageSize*( a_ImageFrac - u_Anchor ) ) / u_ViewportSize );  ',\r\n        '      gl_Position = vec4( xy, 0.0, 1.0 );                                                                        ',\r\n        '                                                                                                                 ',\r\n        '      v_StCoord = vec2( a_ImageFrac.x, 1.0 - a_ImageFrac.y );                                                    ',\r\n        '  }                                                                                                              ',\r\n        '                                                                                                                 '\r\n    );\r\n\r\n    private textureRenderer_FRAGSHADER = concatLines(\r\n        '                                                         ',\r\n        '  precision mediump float;                               ',\r\n        '                                                         ',\r\n        '  uniform sampler2D u_Sampler;                           ',\r\n        '                                                         ',\r\n        '  varying vec2 v_StCoord;                                ',\r\n        '                                                         ',\r\n        '  void main( ) {                                         ',\r\n        '      gl_FragColor = texture2D( u_Sampler, v_StCoord );  ',\r\n        '  }                                                      ',\r\n        '                                                         '\r\n    );\r\n\r\n\r\n    private program: Program;\r\n    private u_XyFrac: Uniform2f;\r\n    private u_Anchor: Uniform2f;\r\n    private u_Rotation_CCWRAD: Uniform1f;\r\n    private u_ImageSize: Uniform2f;\r\n    private u_ViewportSize: Uniform2f;\r\n    private u_Sampler: UniformSampler2D;\r\n\r\n    private a_ImageFrac: Attribute;\r\n\r\n    private imageFracData: Buffer;\r\n\r\n    private wViewport: number;\r\n    private hViewport: number;\r\n\r\n\r\n    constructor() {\r\n        this.program = new Program(this.textureRenderer_VERTSHADER, this.textureRenderer_FRAGSHADER);\r\n        this.u_XyFrac = new Uniform2f(this.program, 'u_XyFrac');\r\n        this.u_Anchor = new Uniform2f(this.program, 'u_Anchor');\r\n        this.u_Rotation_CCWRAD = new Uniform1f(this.program, 'u_Rotation_CCWRAD');\r\n        this.u_ImageSize = new Uniform2f(this.program, 'u_ImageSize');\r\n        this.u_ViewportSize = new Uniform2f(this.program, 'u_ViewportSize');\r\n        this.u_Sampler = new UniformSampler2D(this.program, 'u_Sampler');\r\n\r\n        this.a_ImageFrac = new Attribute(this.program, 'a_ImageFrac');\r\n        this.imageFracData = newStaticBuffer(new Float32Array([0.0, 0.0, 0.0, 1.0, 1.0, 0.0, 1.0, 1.0]));\r\n\r\n        this.wViewport = 0;\r\n        this.hViewport = 0;\r\n    }\r\n\r\n    begin(gl: WebGLRenderingContext, viewport: BoundsUnmodifiable) {\r\n        gl.blendFuncSeparate(GL.SRC_ALPHA, GL.ONE_MINUS_SRC_ALPHA, GL.ONE, GL.ONE_MINUS_SRC_ALPHA);\r\n        gl.enable(GL.BLEND);\r\n\r\n        this.program.use(gl);\r\n        this.u_ViewportSize.setData(gl, viewport.w, viewport.h);\r\n        this.a_ImageFrac.setDataAndEnable(gl, this.imageFracData, 2, GL.FLOAT);\r\n\r\n        this.wViewport = viewport.w;\r\n        this.hViewport = viewport.h;\r\n    }\r\n\r\n    draw(gl: WebGLRenderingContext, texture: Texture2D, xFrac: number, yFrac: number, options?: TextureDrawOptions) {\r\n        const xAnchor = (hasval(options) && hasval(options.xAnchor) ? options.xAnchor : 0.5);\r\n        const yAnchor = (hasval(options) && hasval(options.yAnchor) ? options.yAnchor : 0.5);\r\n        const rotation_CCWRAD = (hasval(options) && hasval(options.rotation_CCWRAD) ? options.rotation_CCWRAD : 0);\r\n        const width = (hasval(options) && hasval(options.width) ? options.width : texture.w);\r\n        const height = (hasval(options) && hasval(options.height) ? options.height : texture.h);\r\n\r\n        this.u_XyFrac.setData(gl, nearestPixel(xFrac, this.wViewport, xAnchor, texture.w), nearestPixel(yFrac, this.hViewport, yAnchor, texture.h));\r\n        this.u_Anchor.setData(gl, xAnchor, yAnchor);\r\n        this.u_Rotation_CCWRAD.setData(gl, rotation_CCWRAD);\r\n        this.u_ImageSize.setData(gl, width, height);\r\n        this.u_Sampler.setDataAndBind(gl, 0, texture);\r\n        gl.drawArrays(GL.TRIANGLE_STRIP, 0, 4);\r\n    }\r\n\r\n    end(gl: WebGLRenderingContext) {\r\n        this.a_ImageFrac.disable(gl);\r\n        this.u_Sampler.unbind(gl);\r\n        this.program.endUse(gl);\r\n    }\r\n}\r\n\r\n\r\n"]}