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@tolokoban/tgd

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ToloGameDev library for WebGL2

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import { TgdDataset } from "./../dataset/index.js"; import { TgdConsole } from "./../debug/index.js"; import { TgdProgram } from "./../program/index.js"; import { TgdShaderFragment, TgdShaderVertex, tgdCodeStringify, } from "./../shader/index.js"; import { ensureArray, tgdTextureRecordToUniforms, webglElementTypeFromTypedArray, webglLookup } from "./../utils/index.js"; import { TgdPainterLogic, TgdVertexArray } from "./../index.js"; import { TgdUniformBufferObject } from "./../uniform/uniform-buffer-object.js"; import { TgdPainter } from "./painter.js"; import { TgdPainterState } from "./state/index.js"; export class TgdPainterProgram extends TgdPainter { constructor(context, { onEnter, onDelete, uniforms = {}, textures = {}, varying, vert, frag, dataset, elements, drawMode, state, elementsCount, elementsOffset, instancesCount, }) { super(); this.context = context; this.elementsCount = 0; this.elementsOffset = 0; this.instancesCount = 0; this.uniformBlocks = []; this.uniformBlocksToDelete = []; this.internalPaint = (time, delta) => { const { context, onEnter, textures, uniformBlocks, prg, vao, elementsType, elementsCount, elementsOffset, instancesCount, drawMode: mode, } = this; const { gl } = context; prg.use(); let unit = 0; for (const name of Object.keys(textures)) { const texture = textures[name]; texture.activate(unit++, prg, name); } onEnter?.(time, delta); for (const block of uniformBlocks) { block.updateData(); } vao.bind(); if (this.hasElements) { if (instancesCount > 0) { gl.drawElementsInstanced(mode, elementsCount, elementsType, elementsOffset, instancesCount); } else { gl.drawElements(mode, elementsCount, elementsType, elementsOffset); } } else { if (instancesCount > 0) { gl.drawArraysInstanced(mode, elementsOffset, elementsCount, instancesCount); } else { gl.drawArrays(mode, elementsOffset, elementsCount); } } vao.unbind(); }; this.textures = textures; this.onEnter = onEnter; this.onDelete = onDelete; const datasets = ensureArray(dataset).map((item) => { if (item instanceof TgdDataset) return item; const attributesDefinition = {}; for (const attribName of Object.keys(item.attribs)) { attributesDefinition[attribName] = item.attribs[attribName].type; } const ds = new TgdDataset(attributesDefinition, item); for (const attribName of Object.keys(item.attribs)) { ds.set(attribName, item.attribs[attribName].data); } return ds; }); this.drawMode = typeof drawMode === "number" ? drawMode : context.gl[drawMode]; const uniformsHeader = ensureArray(this.uniformsToCode(uniforms)); const uniformsForTextures = tgdTextureRecordToUniforms(textures); const vertexShader = new TgdShaderVertex({ ...vert, uniforms: uniformsForTextures, attributes: resolveAttributesFromDataset(datasets), header: [...uniformsHeader, ...ensureArray(vert.header)], varying, }); const fragmentShader = new TgdShaderFragment({ ...frag, uniforms: uniformsForTextures, header: [...uniformsHeader, ...ensureArray(vert.header)], varying, }); const program = new TgdProgram(context.gl, { vert: vertexShader, frag: fragmentShader, }); this.prg = program; program.use(); const samplerNames = Object.keys(textures); for (let unit = 0; unit < samplerNames.length; unit++) { const uniformName = samplerNames[unit]; const texture = textures[uniformName]; texture.activate(unit, program, uniformName); } const vao = new TgdVertexArray(context.gl, program, datasets, elements); this.vao = vao; this.painterState = new TgdPainterState(context, { ...state, children: [new TgdPainterLogic(this.internalPaint)], }); this.elementsCount = elementsCount ?? resolveElementsCount(datasets, elements); this.elementsOffset = elementsOffset ?? 0; this.instancesCount = instancesCount ?? resolveInstancesCount(datasets); this.hasElements = !!elements; this.elementsType = elements ? webglElementTypeFromTypedArray(elements) : 0; const setBindingPoints = new Set(); Object.keys(uniforms).forEach((blockName, index) => { const block = this.uniformBlocks[index]; if (setBindingPoints.has(block.bindingPoint)) { const code = Object.keys(uniforms).map((blockName, index) => this.uniformBlocks[index].toShaderCode(blockName)); throw new Error(`[TgdPainterProgram] Uniform blocks must have distincts binding points!\n${tgdCodeStringify(code)}`); } setBindingPoints.add(block.bindingPoint); block.bindToProgram(program, blockName); }); } setElements(elements) { this.vao.updateElements(elements); this.elementsCount = elements.length; } /** * Update the values of an attribute of a dataset and resolve the counts. */ setAttributeValues(dataset, attribName, values) { try { dataset.set(attribName, values); this.vao.updateDataset(dataset); if (dataset.divisor > 0) { this.instancesCount = values.length; } else { const { gl } = this.context; switch (this.drawMode) { case gl.POINTS: return values.length; case gl.LINES: return Math.floor(values.length / 2); case gl.LINE_LOOP: return values.length; case gl.LINE_STRIP: return values.length - 1; case gl.TRIANGLES: return Math.floor(values.length / 3); case gl.TRIANGLE_FAN: case gl.TRIANGLE_STRIP: return values.length - 2; default: throw new Error(`Unknown drawMode: ${webglLookup(this.drawMode)}!`); } } } catch (error) { const message = error instanceof Error ? error.message : JSON.stringify(error); throw new Error(`[TgdPainterProgram] Unable to set attribute values of dataset "${dataset.name}" for "${this.name}"!\n${message}`); } } delete() { this.onDelete?.(); for (const block of this.uniformBlocksToDelete) { block.delete(); } this.prg.delete(); this.vao.delete(); } paint(time, delta) { this.painterState.paint(time, delta); } debug(caption) { console.debug(caption ?? this.name); console.debug({ drawMode: webglLookup(this.drawMode), elementsCount: this.elementsCount, elementsOffset: this.elementsOffset, instancesCount: this.instancesCount, }); this.vao.debug(); } uniformsToCode(uniforms) { const code = []; const setNames = new Set(); const setDuplicated = new Set(); const names = {}; for (const blockName of Object.keys(uniforms)) { const block = this.resolveUniformBlock(uniforms[blockName]); this.uniformBlocks.push(block); names[blockName] = block.names; code.push(...ensureArray(block.toShaderCode(blockName))); for (const name of block.names) { if (setNames.has(name)) setDuplicated.add(name); else setNames.add(name); } } if (setDuplicated.size > 0) { // There is a duplicate! const out = new TgdConsole({ text: "[TgdPainterProgram] You have duplicated names in your uniform blocks:\n", color: "#f33", }); for (const blockName of Object.keys(names)) { out.add(` ${blockName}`, { bold: true }).add(": "); names[blockName].forEach((name, index) => { if (index > 0) out.add(", "); out.add(name, setDuplicated.has(name) ? { bold: true, color: "#f33", } : undefined); }); out.nl(); } out.error(); } return code; } resolveUniformBlock(obj) { if (obj instanceof TgdUniformBufferObject) return obj; return new TgdUniformBufferObject(this.context, obj); } } function resolveAttributesFromDataset(datasets) { const attributes = {}; const setNames = new Set(); const setDuplicated = new Set(); for (const dataset of datasets) { for (const name of dataset.attributesNames) { if (setNames.has(name)) setDuplicated.add(name); else setNames.add(name); attributes[name] = dataset.getType(name); } } if (setDuplicated.size > 0) { // There is a duplicate! const out = new TgdConsole({ text: "[TgdPainterProgram] You have duplicated names in your datasets:\n", color: "#f33", }); for (const dataset of datasets) { out.add(` ${dataset.name}`, { bold: true }).add(": "); dataset.attributesNames.forEach((name, index) => { if (index > 0) out.add(", "); out.add(name, setDuplicated.has(name) ? { bold: true, color: "#f33", } : undefined); }); out.nl(); } out.error(); } return attributes; } function resolveElementsCount(datasets, elements) { if (elements) return elements.length; const counts = datasets.filter((ds) => ds.divisor === 0).map((ds) => ds.count); if (counts.length === 0) { throw new Error("[TgdPainterProgram] You must give at least one Dataset with divisor 0 in the constructor!\nOr you can specify elementsCount."); } if (counts.length === 1) return counts[0]; counts.sort(); const [first] = counts; const last = counts[counts.length - 1]; if (first === last) return first; throw new Error(`[TgdPainterPogram] I cannot resolve elementsCount because your datasets have different counts!\n${datasets .filter((ds) => ds.divisor === 0) .map((ds) => ` ${ds.name}: count == ${ds.count}`)}`); } function resolveInstancesCount(datasets) { const counts = datasets.filter((ds) => ds.divisor > 0).map((ds) => ds.count / ds.divisor); if (counts.length === 0) return 0; if (counts.length === 1) return counts[0]; counts.sort(); const [first] = counts; const last = counts[counts.length - 1]; if (first === last) return first; throw new Error(`[TgdPainterPogram] I cannot resolve elementsCount because your instance datasets have different counts!\n${datasets .filter((ds) => ds.divisor > 0) .map((ds) => ` ${ds.name}: count == ${ds.count} / ${ds.divisor} == ${ds.count / ds.divisor}`)}`); } //# 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