molstar
Version:
A comprehensive macromolecular library.
53 lines • 2.1 kB
JavaScript
/**
* Copyright (c) 2020 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
*/
import { printTextureImage } from '../../mol-gl/renderable/util';
import { defaults, ValueCell } from '../../mol-util';
import { ValueSpec, AttributeSpec, UniformSpec } from '../../mol-gl/renderable/schema';
import { Vec2 } from '../../mol-math/linear-algebra';
import { PixelData } from '../../mol-util/image';
export var QuadPositions = new Float32Array([
1.0, 1.0, -1.0, 1.0, -1.0, -1.0,
-1.0, -1.0, 1.0, -1.0, 1.0, 1.0 // Second triangle
]);
export var QuadSchema = {
drawCount: ValueSpec('number'),
instanceCount: ValueSpec('number'),
aPosition: AttributeSpec('float32', 2, 0),
uQuadScale: UniformSpec('v2'),
};
export var QuadValues = {
drawCount: ValueCell.create(6),
instanceCount: ValueCell.create(1),
aPosition: ValueCell.create(QuadPositions),
uQuadScale: ValueCell.create(Vec2.create(1, 1)),
};
//
function getArrayForTexture(gl, texture, size) {
switch (texture.type) {
case gl.UNSIGNED_BYTE: return new Uint8Array(size);
case gl.FLOAT: return new Float32Array(size);
}
throw new Error('unknown/unsupported texture type');
}
export function readTexture(ctx, texture, width, height) {
var gl = ctx.gl, resources = ctx.resources;
width = defaults(width, texture.getWidth());
height = defaults(height, texture.getHeight());
var size = width * height * 4;
var framebuffer = resources.framebuffer();
var array = getArrayForTexture(gl, texture, size);
framebuffer.bind();
texture.attachFramebuffer(framebuffer, 0);
ctx.readPixels(0, 0, width, height, array);
return { array: array, width: width, height: height };
}
export function printTexture(ctx, texture, options) {
if (options === void 0) { options = {}; }
var pixelData = readTexture(ctx, texture);
PixelData.flipY(pixelData);
printTextureImage(pixelData, options);
}
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