webglimpse
Version:
Webglimpse is a data visualization library for the web.
124 lines • 22.9 kB
JavaScript
import { Program, UniformColor, Attribute } from '../shader';
import { xyNdc_VERTSHADER, solid_FRAGSHADER, putQuadXys, fracToNdc } from '../misc';
import { newDynamicBuffer } from '../buffer';
import { GL, hasval } from '../util/util';
export function newBorderPainter(color, options) {
if (!hasval(options)) {
options = {};
}
if (!hasval(options.drawTop)) {
options.drawTop = true;
}
if (!hasval(options.drawLeft)) {
options.drawLeft = true;
}
if (!hasval(options.drawRight)) {
options.drawRight = true;
}
if (!hasval(options.drawBottom)) {
options.drawBottom = true;
}
if (!hasval(options.thickness)) {
options.thickness = 1;
}
const simple = (options.thickness === 1 && color.a >= 1);
return (simple ? newSimpleBorderPainter(color, options) : newFullBorderPainter(color, options));
}
function newFullBorderPainter(color, options) {
const drawTop = options.drawTop;
const drawLeft = options.drawLeft;
const drawRight = options.drawRight;
const drawBottom = options.drawBottom;
const thickness = options.thickness;
const program = new Program(xyNdc_VERTSHADER, solid_FRAGSHADER);
const u_Color = new UniformColor(program, 'u_Color');
const a_XyNdc = new Attribute(program, 'a_XyNdc');
const numVertices = (drawTop ? 6 : 0) + (drawLeft ? 6 : 0) + (drawRight ? 6 : 0) + (drawBottom ? 6 : 0);
const xy_NDC = new Float32Array(2 * numVertices);
const xyBuffer_NDC = newDynamicBuffer();
return function (gl, viewport) {
if (color.a >= 1) {
gl.disable(GL.BLEND);
}
else {
gl.blendFuncSeparate(GL.SRC_ALPHA, GL.ONE_MINUS_SRC_ALPHA, GL.ONE, GL.ONE_MINUS_SRC_ALPHA);
gl.enable(GL.BLEND);
}
program.use(gl);
u_Color.setData(gl, color);
const w_NDC = 2 * thickness / viewport.w;
const h_NDC = 2 * thickness / viewport.h;
let index = 0;
if (drawTop) {
index = putQuadXys(xy_NDC, index, -1, (drawRight ? +1 - w_NDC : +1), +1, +1 - h_NDC);
}
if (drawRight) {
index = putQuadXys(xy_NDC, index, +1 - w_NDC, +1, +1, (drawBottom ? -1 + h_NDC : -1));
}
if (drawBottom) {
index = putQuadXys(xy_NDC, index, (drawLeft ? -1 + w_NDC : -1), +1, -1 + h_NDC, -1);
}
if (drawLeft) {
index = putQuadXys(xy_NDC, index, -1, -1 + w_NDC, (drawTop ? +1 - h_NDC : +1), -1);
}
xyBuffer_NDC.setData(xy_NDC);
a_XyNdc.setDataAndEnable(gl, xyBuffer_NDC, 2, GL.FLOAT);
gl.drawArrays(GL.TRIANGLES, 0, numVertices);
a_XyNdc.disable(gl);
program.endUse(gl);
};
}
function newSimpleBorderPainter(color, options) {
const drawTop = options.drawTop;
const drawLeft = options.drawLeft;
const drawRight = options.drawRight;
const drawBottom = options.drawBottom;
const program = new Program(xyNdc_VERTSHADER, solid_FRAGSHADER);
const u_Color = new UniformColor(program, 'u_Color');
const a_XyNdc = new Attribute(program, 'a_XyNdc');
const numVertices = (drawTop ? 2 : 0) + (drawLeft ? 2 : 0) + (drawRight ? 2 : 0) + (drawBottom ? 2 : 0);
const xy_NDC = new Float32Array(2 * numVertices);
const xyBuffer_NDC = newDynamicBuffer();
return function (gl, viewport) {
gl.disable(GL.BLEND);
program.use(gl);
u_Color.setData(gl, color);
const left_NDC = fracToNdc(0.5 / viewport.w);
const bottom_NDC = fracToNdc(0.5 / viewport.h);
const right_NDC = fracToNdc((viewport.w - 0.5) / viewport.w);
const top_NDC = fracToNdc((viewport.h - 0.5) / viewport.h);
let n = 0;
if (drawTop) {
xy_NDC[n++] = -1;
xy_NDC[n++] = top_NDC;
xy_NDC[n++] = +1;
xy_NDC[n++] = top_NDC;
}
if (drawRight) {
xy_NDC[n++] = right_NDC;
xy_NDC[n++] = +1;
xy_NDC[n++] = right_NDC;
xy_NDC[n++] = -1;
}
if (drawBottom) {
xy_NDC[n++] = +1;
xy_NDC[n++] = bottom_NDC;
xy_NDC[n++] = -1;
xy_NDC[n++] = bottom_NDC;
}
if (drawLeft) {
xy_NDC[n++] = left_NDC;
xy_NDC[n++] = -1;
xy_NDC[n++] = left_NDC;
xy_NDC[n++] = +1;
}
xyBuffer_NDC.setData(xy_NDC);
a_XyNdc.setDataAndEnable(gl, xyBuffer_NDC, 2, GL.FLOAT);
// IE does not support lineWidths other than 1, so make sure all browsers use lineWidth of 1
gl.lineWidth(1);
gl.drawArrays(GL.LINES, 0, numVertices);
a_XyNdc.disable(gl);
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 { Color } from '../color';\r\nimport { Painter } from '../core';\r\nimport { Program, UniformColor, Attribute } from '../shader';\r\nimport { xyNdc_VERTSHADER, solid_FRAGSHADER, putQuadXys, fracToNdc } from '../misc';\r\nimport { newDynamicBuffer } from '../buffer';\r\nimport { BoundsUnmodifiable } from '../bounds';\r\nimport { GL, hasval } from '../util/util';\r\n\r\n\r\nexport interface BorderOptions {\r\n    drawTop?: boolean;\r\n    drawLeft?: boolean;\r\n    drawRight?: boolean;\r\n    drawBottom?: boolean;\r\n    thickness?: number;\r\n}\r\n\r\n\r\nexport function newBorderPainter(color: Color, options?: BorderOptions): Painter {\r\n    if (!hasval(options)) {\r\n        options = {};\r\n    }\r\n    if (!hasval(options.drawTop)) {\r\n        options.drawTop = true;\r\n    }\r\n    if (!hasval(options.drawLeft)) {\r\n        options.drawLeft = true;\r\n    }\r\n    if (!hasval(options.drawRight)) {\r\n        options.drawRight = true;\r\n    }\r\n    if (!hasval(options.drawBottom)) {\r\n        options.drawBottom = true;\r\n    }\r\n    if (!hasval(options.thickness)) {\r\n        options.thickness = 1;\r\n    }\r\n\r\n    const simple = (options.thickness === 1 && color.a >= 1);\r\n    return (simple ? newSimpleBorderPainter(color, options) : newFullBorderPainter(color, options));\r\n}\r\n\r\n\r\nfunction newFullBorderPainter(color: Color, options: BorderOptions): Painter {\r\n    const drawTop = options.drawTop;\r\n    const drawLeft = options.drawLeft;\r\n    const drawRight = options.drawRight;\r\n    const drawBottom = options.drawBottom;\r\n    const thickness = options.thickness;\r\n\r\n    const program = new Program(xyNdc_VERTSHADER, solid_FRAGSHADER);\r\n    const u_Color = new UniformColor(program, 'u_Color');\r\n    const a_XyNdc = new Attribute(program, 'a_XyNdc');\r\n\r\n    const numVertices = (drawTop ? 6 : 0) + (drawLeft ? 6 : 0) + (drawRight ? 6 : 0) + (drawBottom ? 6 : 0);\r\n    const xy_NDC = new Float32Array(2 * numVertices);\r\n    const xyBuffer_NDC = newDynamicBuffer();\r\n\r\n    return function (gl: WebGLRenderingContext, viewport: BoundsUnmodifiable) {\r\n        if (color.a >= 1) {\r\n            gl.disable(GL.BLEND);\r\n        }\r\n        else {\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\r\n        program.use(gl);\r\n        u_Color.setData(gl, color);\r\n\r\n        const w_NDC = 2 * thickness / viewport.w;\r\n        const h_NDC = 2 * thickness / viewport.h;\r\n        let index = 0;\r\n        if (drawTop) {\r\n            index = putQuadXys(xy_NDC, index, -1, (drawRight ? +1 - w_NDC : +1), +1, +1 - h_NDC);\r\n        }\r\n        if (drawRight) {\r\n            index = putQuadXys(xy_NDC, index, +1 - w_NDC, +1, +1, (drawBottom ? -1 + h_NDC : -1));\r\n        }\r\n        if (drawBottom) {\r\n            index = putQuadXys(xy_NDC, index, (drawLeft ? -1 + w_NDC : -1), +1, -1 + h_NDC, -1);\r\n        }\r\n        if (drawLeft) {\r\n            index = putQuadXys(xy_NDC, index, -1, -1 + w_NDC, (drawTop ? +1 - h_NDC : +1), -1);\r\n        }\r\n\r\n        xyBuffer_NDC.setData(xy_NDC);\r\n        a_XyNdc.setDataAndEnable(gl, xyBuffer_NDC, 2, GL.FLOAT);\r\n\r\n        gl.drawArrays(GL.TRIANGLES, 0, numVertices);\r\n\r\n        a_XyNdc.disable(gl);\r\n        program.endUse(gl);\r\n    };\r\n}\r\n\r\n\r\nfunction newSimpleBorderPainter(color: Color, options: BorderOptions): Painter {\r\n    const drawTop = options.drawTop;\r\n    const drawLeft = options.drawLeft;\r\n    const drawRight = options.drawRight;\r\n    const drawBottom = options.drawBottom;\r\n\r\n    const program = new Program(xyNdc_VERTSHADER, solid_FRAGSHADER);\r\n    const u_Color = new UniformColor(program, 'u_Color');\r\n    const a_XyNdc = new Attribute(program, 'a_XyNdc');\r\n\r\n    const numVertices = (drawTop ? 2 : 0) + (drawLeft ? 2 : 0) + (drawRight ? 2 : 0) + (drawBottom ? 2 : 0);\r\n    const xy_NDC = new Float32Array(2 * numVertices);\r\n    const xyBuffer_NDC = newDynamicBuffer();\r\n\r\n    return function (gl: WebGLRenderingContext, viewport: BoundsUnmodifiable) {\r\n        gl.disable(GL.BLEND);\r\n\r\n        program.use(gl);\r\n        u_Color.setData(gl, color);\r\n\r\n        const left_NDC = fracToNdc(0.5 / viewport.w);\r\n        const bottom_NDC = fracToNdc(0.5 / viewport.h);\r\n        const right_NDC = fracToNdc((viewport.w - 0.5) / viewport.w);\r\n        const top_NDC = fracToNdc((viewport.h - 0.5) / viewport.h);\r\n\r\n        let n = 0;\r\n        if (drawTop) {\r\n            xy_NDC[n++] = -1; xy_NDC[n++] = top_NDC;\r\n            xy_NDC[n++] = +1; xy_NDC[n++] = top_NDC;\r\n        }\r\n        if (drawRight) {\r\n            xy_NDC[n++] = right_NDC; xy_NDC[n++] = +1;\r\n            xy_NDC[n++] = right_NDC; xy_NDC[n++] = -1;\r\n        }\r\n        if (drawBottom) {\r\n            xy_NDC[n++] = +1; xy_NDC[n++] = bottom_NDC;\r\n            xy_NDC[n++] = -1; xy_NDC[n++] = bottom_NDC;\r\n        }\r\n        if (drawLeft) {\r\n            xy_NDC[n++] = left_NDC; xy_NDC[n++] = -1;\r\n            xy_NDC[n++] = left_NDC; xy_NDC[n++] = +1;\r\n        }\r\n\r\n        xyBuffer_NDC.setData(xy_NDC);\r\n        a_XyNdc.setDataAndEnable(gl, xyBuffer_NDC, 2, GL.FLOAT);\r\n\r\n        // IE does not support lineWidths other than 1, so make sure all browsers use lineWidth of 1\r\n        gl.lineWidth(1);\r\n        gl.drawArrays(GL.LINES, 0, numVertices);\r\n\r\n        a_XyNdc.disable(gl);\r\n        program.endUse(gl);\r\n    };\r\n}\r\n\r\n\r\n"]}