@tensorflow/tfjs-core
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Hardware-accelerated JavaScript library for machine intelligence
282 lines • 15.3 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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step((generator = generator.apply(thisArg, _arguments || [])).next());
});
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var __generator = (this && this.__generator) || function (thisArg, body) {
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Object.defineProperty(exports, "__esModule", { value: true });
var environment_1 = require("../../environment");
var tex_util = require("./tex_util");
var webgl_util = require("./webgl_util");
function getWebGLContextAttributes() {
return {
alpha: false,
antialias: false,
premultipliedAlpha: false,
preserveDrawingBuffer: false,
depth: false,
stencil: false,
failIfMajorPerformanceCaveat: true
};
}
exports.getWebGLContextAttributes = getWebGLContextAttributes;
function createWebGLContext(canvas) {
var attributes = getWebGLContextAttributes();
var gl;
if (canvas != null) {
gl = webgl_util.createWebGLRenderingContextFromCanvas(canvas, attributes);
}
else {
gl = webgl_util.createWebGLRenderingContext(attributes);
}
webgl_util.callAndCheck(gl, function () { return gl.disable(gl.DEPTH_TEST); });
webgl_util.callAndCheck(gl, function () { return gl.disable(gl.STENCIL_TEST); });
webgl_util.callAndCheck(gl, function () { return gl.disable(gl.BLEND); });
webgl_util.callAndCheck(gl, function () { return gl.disable(gl.DITHER); });
webgl_util.callAndCheck(gl, function () { return gl.disable(gl.POLYGON_OFFSET_FILL); });
webgl_util.callAndCheck(gl, function () { return gl.disable(gl.SAMPLE_COVERAGE); });
webgl_util.callAndCheck(gl, function () { return gl.enable(gl.SCISSOR_TEST); });
webgl_util.callAndCheck(gl, function () { return gl.enable(gl.CULL_FACE); });
webgl_util.callAndCheck(gl, function () { return gl.cullFace(gl.BACK); });
return gl;
}
exports.createWebGLContext = createWebGLContext;
function createVertexShader(gl) {
var vertexShaderSource = "\n precision highp float;\n attribute vec3 clipSpacePos;\n attribute vec2 uv;\n varying vec2 resultUV;\n\n void main() {\n gl_Position = vec4(clipSpacePos, 1);\n resultUV = uv;\n }";
return webgl_util.createVertexShader(gl, vertexShaderSource);
}
exports.createVertexShader = createVertexShader;
function createVertexBuffer(gl) {
var vertexArray = new Float32Array([-1, 1, 0, 0, 1, -1, -1, 0, 0, 0, 1, 1, 0, 1, 1, 1, -1, 0, 1, 0]);
return webgl_util.createStaticVertexBuffer(gl, vertexArray);
}
exports.createVertexBuffer = createVertexBuffer;
function createIndexBuffer(gl) {
var triangleVertexIndices = new Uint16Array([0, 1, 2, 2, 1, 3]);
return webgl_util.createStaticIndexBuffer(gl, triangleVertexIndices);
}
exports.createIndexBuffer = createIndexBuffer;
function getTextureInternalFormat(gl, numChannels) {
if (!environment_1.ENV.get('WEBGL_FLOAT_TEXTURE_ENABLED')) {
return gl.RGBA;
}
if (environment_1.ENV.get('WEBGL_VERSION') === 2) {
if (numChannels === 4) {
return gl.RGBA32F;
}
return gl.R32F;
}
return gl.RGBA;
}
function getTextureFormat(gl, numChannels) {
if (!environment_1.ENV.get('WEBGL_FLOAT_TEXTURE_ENABLED')) {
return gl.RGBA;
}
if (environment_1.ENV.get('WEBGL_VERSION') === 2) {
if (numChannels === 4) {
return gl.RGBA;
}
return gl.RED;
}
return gl.RGBA;
}
function getTextureType(gl) {
if (!environment_1.ENV.get('WEBGL_FLOAT_TEXTURE_ENABLED')) {
return gl.UNSIGNED_BYTE;
}
return gl.FLOAT;
}
function createAndConfigureTexture(gl, width, height, numChannels) {
webgl_util.validateTextureSize(gl, width, height);
var texture = webgl_util.createTexture(gl);
var tex2d = gl.TEXTURE_2D;
var internalFormat = getTextureInternalFormat(gl, numChannels);
var format = getTextureFormat(gl, numChannels);
webgl_util.callAndCheck(gl, function () { return gl.bindTexture(tex2d, texture); });
webgl_util.callAndCheck(gl, function () { return gl.texParameteri(tex2d, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); });
webgl_util.callAndCheck(gl, function () { return gl.texParameteri(tex2d, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); });
webgl_util.callAndCheck(gl, function () { return gl.texParameteri(tex2d, gl.TEXTURE_MIN_FILTER, gl.NEAREST); });
webgl_util.callAndCheck(gl, function () { return gl.texParameteri(tex2d, gl.TEXTURE_MAG_FILTER, gl.NEAREST); });
webgl_util.callAndCheck(gl, function () { return gl.texImage2D(tex2d, 0, internalFormat, width, height, 0, format, getTextureType(gl), null); });
webgl_util.callAndCheck(gl, function () { return gl.bindTexture(gl.TEXTURE_2D, null); });
return texture;
}
function createMatrixTexture(gl, rows, columns) {
var _a = tex_util.getUnpackedMatrixTextureShapeWidthHeight(rows, columns), width = _a[0], height = _a[1];
var numChannels = 1;
return createAndConfigureTexture(gl, width, height, numChannels);
}
exports.createMatrixTexture = createMatrixTexture;
function createColorMatrixTexture(gl, rows, columns) {
var _a = tex_util.getColorMatrixTextureShapeWidthHeight(rows, columns), width = _a[0], height = _a[1];
var numChannels = 4;
return createAndConfigureTexture(gl, width, height, numChannels);
}
exports.createColorMatrixTexture = createColorMatrixTexture;
function createPackedMatrixTexture(gl, rows, columns) {
var _a = tex_util.getPackedMatrixTextureShapeWidthHeight(rows, columns), width = _a[0], height = _a[1];
var numChannels = 4;
return createAndConfigureTexture(gl, width, height, numChannels);
}
exports.createPackedMatrixTexture = createPackedMatrixTexture;
function bindVertexProgramAttributeStreams(gl, program, vertexBuffer) {
var posOffset = 0;
var uvOffset = 3 * 4;
var stride = (3 * 4) + (2 * 4);
webgl_util.callAndCheck(gl, function () { return gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer); });
var success = webgl_util.bindVertexBufferToProgramAttribute(gl, program, 'clipSpacePos', vertexBuffer, 3, stride, posOffset);
return success &&
webgl_util.bindVertexBufferToProgramAttribute(gl, program, 'uv', vertexBuffer, 2, stride, uvOffset);
}
exports.bindVertexProgramAttributeStreams = bindVertexProgramAttributeStreams;
function uploadPixelDataToTexture(gl, texture, pixels) {
webgl_util.callAndCheck(gl, function () { return gl.bindTexture(gl.TEXTURE_2D, texture); });
webgl_util.callAndCheck(gl, function () { return gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, pixels); });
webgl_util.callAndCheck(gl, function () { return gl.bindTexture(gl.TEXTURE_2D, null); });
}
exports.uploadPixelDataToTexture = uploadPixelDataToTexture;
function uploadDataToTexture(gl, texture, width, height, data, numChannels) {
var textureFormat = getTextureFormat(gl, numChannels);
webgl_util.validateTextureSize(gl, width, height);
webgl_util.callAndCheck(gl, function () { return gl.bindTexture(gl.TEXTURE_2D, texture); });
webgl_util.callAndCheck(gl, function () { return gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height, textureFormat, getTextureType(gl), data); });
webgl_util.callAndCheck(gl, function () { return gl.bindTexture(gl.TEXTURE_2D, null); });
}
function uploadMatrixToTexture(gl, texture, rows, columns, matrix, numChannels) {
var _a = tex_util.getUnpackedMatrixTextureShapeWidthHeight(rows, columns), w = _a[0], h = _a[1];
var unpackedArray;
if (environment_1.ENV.get('WEBGL_FLOAT_TEXTURE_ENABLED')) {
var channelsPerTexture = numChannels === 1 ? webgl_util.getChannelsPerTexture() : numChannels;
if (channelsPerTexture === 1) {
unpackedArray = matrix;
}
else {
unpackedArray =
new Float32Array(tex_util.getUnpackedArraySizeFromMatrixSize(matrix.length, channelsPerTexture));
tex_util.encodeMatrixToUnpackedArray(matrix, unpackedArray, channelsPerTexture);
}
}
else {
unpackedArray = tex_util.encodeFloatArray(matrix);
}
uploadDataToTexture(gl, texture, w, h, unpackedArray, numChannels);
}
exports.uploadMatrixToTexture = uploadMatrixToTexture;
function uploadMatrixToPackedTexture(gl, texture, rows, columns, matrix) {
var _a = tex_util.getPackedMatrixTextureShapeWidthHeight(rows, columns), w = _a[0], h = _a[1];
var packedRGBA = new Float32Array(tex_util.getPackedRGBAArraySizeFromMatrixShape(rows, columns));
tex_util.encodeMatrixToPackedRGBA(matrix, rows, columns, packedRGBA);
var numChannels = 4;
uploadDataToTexture(gl, texture, w, h, packedRGBA, numChannels);
}
exports.uploadMatrixToPackedTexture = uploadMatrixToPackedTexture;
function getDownloadTargetArrayBuffer(rows, columns, channelsPerTexture) {
var isFloatTexture = environment_1.ENV.get('WEBGL_FLOAT_TEXTURE_ENABLED');
var downloadTarget;
if (isFloatTexture) {
downloadTarget =
new Float32Array(tex_util.getUnpackedArraySizeFromMatrixSize(rows * columns, channelsPerTexture));
}
else {
downloadTarget = new Uint8Array(rows * columns * channelsPerTexture);
}
return downloadTarget;
}
function decodeDownloadTargetArrayBuffer(downloadTarget, rows, columns, channelsPerPixel) {
var isFloatTexture = environment_1.ENV.get('WEBGL_FLOAT_TEXTURE_ENABLED');
if (isFloatTexture) {
var matrix = new Float32Array(rows * columns);
tex_util.decodeMatrixFromUnpackedArray(downloadTarget, matrix, channelsPerPixel);
return matrix;
}
else {
return tex_util.decodeToFloatArray(downloadTarget);
}
}
function downloadMatrixFromOutputTextureAsync(gl, getBufferSubDataAsyncExtension, rows, columns) {
return __awaiter(this, void 0, void 0, function () {
var gl2, channelsPerPixel, downloadTarget, bufferSizeBytes, buffer;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
gl2 = gl;
channelsPerPixel = 4;
downloadTarget = getDownloadTargetArrayBuffer(rows, columns, channelsPerPixel);
bufferSizeBytes = downloadTarget instanceof Float32Array ?
downloadTarget.length * 4 :
downloadTarget;
buffer = gl.createBuffer();
webgl_util.callAndCheck(gl, function () { return gl.bindBuffer(gl2.PIXEL_PACK_BUFFER, buffer); });
webgl_util.callAndCheck(gl, function () { return gl.bufferData(gl2.PIXEL_PACK_BUFFER, bufferSizeBytes, gl.STATIC_DRAW); });
webgl_util.callAndCheck(gl, function () {
return gl2.readPixels(0, 0, columns, rows, gl.RGBA, getTextureType(gl), 0);
});
return [4, getBufferSubDataAsyncExtension.getBufferSubDataAsync(gl2.PIXEL_PACK_BUFFER, 0, downloadTarget)];
case 1:
_a.sent();
return [2, decodeDownloadTargetArrayBuffer(downloadTarget, rows, columns, channelsPerPixel)];
}
});
});
}
exports.downloadMatrixFromOutputTextureAsync = downloadMatrixFromOutputTextureAsync;
function downloadMatrixFromOutputTexture(gl, rows, columns) {
var _a = tex_util.getUnpackedMatrixTextureShapeWidthHeight(rows, columns), w = _a[0], h = _a[1];
var channelsPerPixel = 4;
var downloadTarget = getDownloadTargetArrayBuffer(rows, columns, channelsPerPixel);
webgl_util.callAndCheck(gl, function () { return gl.readPixels(0, 0, w, h, gl.RGBA, getTextureType(gl), downloadTarget); });
return decodeDownloadTargetArrayBuffer(downloadTarget, rows, columns, channelsPerPixel);
}
exports.downloadMatrixFromOutputTexture = downloadMatrixFromOutputTexture;
function downloadMatrixFromRGBAColorTexture(gl, rows, columns, channels) {
var size = rows * columns * 4;
var downloadTarget = new Uint8Array(size);
webgl_util.callAndCheck(gl, function () { return gl.readPixels(0, 0, columns, rows, gl.RGBA, gl.UNSIGNED_BYTE, downloadTarget); });
var packedRGBA = new Float32Array(size);
for (var i = 0; i < downloadTarget.length; i++) {
packedRGBA[i] = downloadTarget[i];
}
var matrix = new Float32Array(rows * columns * channels);
tex_util.decodeMatrixFromUnpackedColorRGBAArray(packedRGBA, matrix, channels);
return matrix;
}
exports.downloadMatrixFromRGBAColorTexture = downloadMatrixFromRGBAColorTexture;
function downloadMatrixFromPackedOutputTexture(gl, rows, columns) {
var _a = tex_util.getPackedMatrixTextureShapeWidthHeight(rows, columns), w = _a[0], h = _a[1];
var packedRGBA = new Float32Array(tex_util.getPackedRGBAArraySizeFromMatrixShape(rows, columns));
webgl_util.callAndCheck(gl, function () { return gl.readPixels(0, 0, w, h, gl.RGBA, getTextureType(gl), packedRGBA); });
var matrix = new Float32Array(rows * columns);
return tex_util.decodeMatrixFromPackedRGBA(packedRGBA, rows, columns, matrix);
}
exports.downloadMatrixFromPackedOutputTexture = downloadMatrixFromPackedOutputTexture;
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