| 1 | {"version":3,"file":"GeometrySystem.js","sources":["../../src/geometry/GeometrySystem.ts"],"sourcesContent":["import { BUFFER_TYPE, ENV } from '@pixi/constants';\nimport { extensions, ExtensionType } from '@pixi/extensions';\nimport { settings } from '@pixi/settings';\n\nimport type { DRAW_MODES } from '@pixi/constants';\nimport type { ExtensionMetadata } from '@pixi/extensions';\nimport type { Dict } from '@pixi/utils';\nimport type { IRenderingContext } from '../IRenderer';\nimport type { Renderer } from '../Renderer';\nimport type { Program } from '../shader/Program';\nimport type { Shader } from '../shader/Shader';\nimport type { ISystem } from '../system/ISystem';\nimport type { Geometry } from './Geometry';\nimport type { GLBuffer } from './GLBuffer';\n\nconst byteSizeMap: {[key: number]: number} = { 5126: 4, 5123: 2, 5121: 1 };\n\n/**\n * System plugin to the renderer to manage geometry.\n * @memberof PIXI\n */\nexport class GeometrySystem implements ISystem\n{\n /** @ignore */\n static extension: ExtensionMetadata = {\n type: ExtensionType.RendererSystem,\n name: 'geometry',\n };\n\n /**\n * `true` if we has `*_vertex_array_object` extension.\n * @readonly\n */\n public hasVao: boolean;\n\n /**\n * `true` if has `ANGLE_instanced_arrays` extension.\n * @readonly\n */\n public hasInstance: boolean;\n\n /**\n * `true` if support `gl.UNSIGNED_INT` in `gl.drawElements` or `gl.drawElementsInstanced`.\n * @readonly\n */\n public canUseUInt32ElementIndex: boolean;\n\n protected CONTEXT_UID: number;\n protected gl: IRenderingContext;\n protected _activeGeometry: Geometry;\n protected _activeVao: WebGLVertexArrayObject;\n protected _boundBuffer: GLBuffer;\n\n /** Cache for all geometries by id, used in case renderer gets destroyed or for profiling. */\n readonly managedGeometries: {[key: number]: Geometry};\n\n /** Renderer that owns this {@link GeometrySystem}. */\n private renderer: Renderer;\n\n /** @param renderer - The renderer this System works for. */\n constructor(renderer: Renderer)\n {\n this.renderer = renderer;\n this._activeGeometry = null;\n this._activeVao = null;\n\n this.hasVao = true;\n this.hasInstance = true;\n this.canUseUInt32ElementIndex = false;\n this.managedGeometries = {};\n }\n\n /** Sets up the renderer context and necessary buffers. */\n protected contextChange(): void\n {\n this.disposeAll(true);\n\n const gl = this.gl = this.renderer.gl;\n const context = this.renderer.context;\n\n this.CONTEXT_UID = this.renderer.CONTEXT_UID;\n\n // webgl2\n if (context.webGLVersion !== 2)\n {\n // webgl 1!\n let nativeVaoExtension = this.renderer.context.extensions.vertexArrayObject;\n\n if (settings.PREFER_ENV === ENV.WEBGL_LEGACY)\n {\n nativeVaoExtension = null;\n }\n\n if (nativeVaoExtension)\n {\n gl.createVertexArray = (): WebGLVertexArrayObject =>\n nativeVaoExtension.createVertexArrayOES();\n\n gl.bindVertexArray = (vao): void =>\n nativeVaoExtension.bindVertexArrayOES(vao);\n\n gl.deleteVertexArray = (vao): void =>\n nativeVaoExtension.deleteVertexArrayOES(vao);\n }\n else\n {\n this.hasVao = false;\n gl.createVertexArray = (): WebGLVertexArrayObject =>\n null;\n\n gl.bindVertexArray = (): void =>\n null;\n\n gl.deleteVertexArray = (): void =>\n null;\n }\n }\n\n if (context.webGLVersion !== 2)\n {\n const instanceExt = gl.getExtension('ANGLE_instanced_arrays');\n\n if (instanceExt)\n {\n gl.vertexAttribDivisor = (a, b): void =>\n instanceExt.vertexAttribDivisorANGLE(a, b);\n\n gl.drawElementsInstanced = (a, b, c, d, e): void =>\n instanceExt.drawElementsInstancedANGLE(a, b, c, d, e);\n\n gl.drawArraysInstanced = (a, b, c, d): void =>\n instanceExt.drawArraysInstancedANGLE(a, b, c, d);\n }\n else\n {\n this.hasInstance = false;\n }\n }\n\n this.canUseUInt32ElementIndex = context.webGLVersion === 2 || !!context.extensions.uint32ElementIndex;\n }\n\n /**\n * Binds geometry so that is can be drawn. Creating a Vao if required\n * @param geometry - Instance of geometry to bind.\n * @param shader - Instance of shader to use vao for.\n */\n bind(geometry?: Geometry, shader?: Shader): void\n {\n shader = shader || this.renderer.shader.shader;\n\n const { gl } = this;\n\n // not sure the best way to address this..\n // currently different shaders require different VAOs for the same geometry\n // Still mulling over the best way to solve this one..\n // will likely need to modify the shader attribute locations at run time!\n let vaos = geometry.glVertexArrayObjects[this.CONTEXT_UID];\n let incRefCount = false;\n\n if (!vaos)\n {\n this.managedGeometries[geometry.id] = geometry;\n geometry.disposeRunner.add(this);\n geometry.glVertexArrayObjects[this.CONTEXT_UID] = vaos = {};\n incRefCount = true;\n }\n\n const vao = vaos[shader.program.id] || this.initGeometryVao(geometry, shader, incRefCount);\n\n this._activeGeometry = geometry;\n\n if (this._activeVao !== vao)\n {\n this._activeVao = vao;\n\n if (this.hasVao)\n {\n gl.bindVertexArray(vao);\n }\n else\n {\n this.activateVao(geometry, shader.program);\n }\n }\n\n // TODO - optimise later!\n // don't need to loop through if nothing changed!\n // maybe look to add an 'autoupdate' to geometry?\n this.updateBuffers();\n }\n\n /** Reset and unbind any active VAO and geometry. */\n reset(): void\n {\n this.unbind();\n }\n\n /** Update buffers of the currently bound geometry. */\n updateBuffers(): void\n {\n const geometry = this._activeGeometry;\n\n const bufferSystem = this.renderer.buffer;\n\n for (let i = 0; i < geometry.buffers.length; i++)\n {\n const buffer = geometry.buffers[i];\n\n bufferSystem.update(buffer);\n }\n }\n\n /**\n * Check compatibility between a geometry and a program\n * @param geometry - Geometry instance.\n * @param program - Program instance.\n */\n protected checkCompatibility(geometry: Geometry, program: Program): void\n {\n // geometry must have at least all the attributes that the shader requires.\n const geometryAttributes = geometry.attributes;\n const shaderAttributes = program.attributeData;\n\n for (const j in shaderAttributes)\n {\n if (!geometryAttributes[j])\n {\n throw new Error(`shader and geometry incompatible, geometry missing the \"${j}\" attribute`);\n }\n }\n }\n\n /**\n * Takes a geometry and program and generates a unique signature for them.\n * @param geometry - To get signature from.\n * @param program - To test geometry against.\n * @returns - Unique signature of the geometry and program\n */\n protected getSignature(geometry: Geometry, program: Program): string\n {\n const attribs = geometry.attributes;\n const shaderAttributes = program.attributeData;\n\n const strings = ['g', geometry.id];\n\n for (const i in attribs)\n {\n if (shaderAttributes[i])\n {\n strings.push(i, shaderAttributes[i].location);\n }\n }\n\n return strings.join('-');\n }\n\n /**\n * Creates or gets Vao with the same structure as the geometry and stores it on the geometry.\n * If vao is created, it is bound automatically. We use a shader to infer what and how to set up the\n * attribute locations.\n * @param geometry - Instance of geometry to to generate Vao for.\n * @param shader - Instance of the shader.\n * @param incRefCount - Increment refCount of all geometry buffers.\n */\n protected initGeometryVao(geometry: Geometry, shader: Shader, incRefCount = true): WebGLVertexArrayObject\n {\n const gl = this.gl;\n const CONTEXT_UID = this.CONTEXT_UID;\n const bufferSystem = this.renderer.buffer;\n const program = shader.program;\n\n if (!program.glPrograms[CONTEXT_UID])\n {\n this.renderer.shader.generateProgram(shader);\n }\n\n this.checkCompatibility(geometry, program);\n\n const signature = this.getSignature(geometry, program);\n\n const vaoObjectHash = geometry.glVertexArrayObjects[this.CONTEXT_UID];\n\n let vao = vaoObjectHash[signature];\n\n if (vao)\n {\n // this will give us easy access to the vao\n vaoObjectHash[program.id] = vao;\n\n return vao;\n }\n\n const buffers = geometry.buffers;\n const attributes = geometry.attributes;\n const tempStride: Dict<number> = {};\n const tempStart: Dict<number> = {};\n\n for (const j in buffers)\n {\n tempStride[j] = 0;\n tempStart[j] = 0;\n }\n\n for (const j in attributes)\n {\n if (!attributes[j].size && program.attributeData[j])\n {\n attributes[j].size = program.attributeData[j].size;\n }\n else if (!attributes[j].size)\n {\n console.warn(`PIXI Geometry attribute '${j}' size cannot be determined (likely the bound shader does not have the attribute)`); // eslint-disable-line\n }\n\n tempStride[attributes[j].buffer] += attributes[j].size * byteSizeMap[attributes[j].type];\n }\n\n for (const j in attributes)\n {\n const attribute = attributes[j];\n const attribSize = attribute.size;\n\n if (attribute.stride === undefined)\n {\n if (tempStride[attribute.buffer] === attribSize * byteSizeMap[attribute.type])\n {\n attribute.stride = 0;\n }\n else\n {\n attribute.stride = tempStride[attribute.buffer];\n }\n }\n\n if (attribute.start === undefined)\n {\n attribute.start = tempStart[attribute.buffer];\n\n tempStart[attribute.buffer] += attribSize * byteSizeMap[attribute.type];\n }\n }\n\n // @TODO: We don't know if VAO is supported.\n vao = gl.createVertexArray();\n\n gl.bindVertexArray(vao);\n\n // first update - and create the buffers!\n // only create a gl buffer if it actually gets\n for (let i = 0; i < buffers.length; i++)\n {\n const buffer = buffers[i];\n\n bufferSystem.bind(buffer);\n\n if (incRefCount)\n {\n buffer._glBuffers[CONTEXT_UID].refCount++;\n }\n }\n\n // TODO - maybe make this a data object?\n // lets wait to see if we need to first!\n\n this.activateVao(geometry, program);\n\n // add it to the cache!\n vaoObjectHash[program.id] = vao;\n vaoObjectHash[signature] = vao;\n\n gl.bindVertexArray(null);\n bufferSystem.unbind(BUFFER_TYPE.ARRAY_BUFFER);\n\n return vao;\n }\n\n /**\n * Disposes geometry.\n * @param geometry - Geometry with buffers. Only VAO will be disposed\n * @param [contextLost=false] - If context was lost, we suppress deleteVertexArray\n */\n disposeGeometry(geometry: Geometry, contextLost?: boolean): void\n {\n if (!this.managedGeometries[geometry.id])\n {\n return;\n }\n\n delete this.managedGeometries[geometry.id];\n\n const vaos = geometry.glVertexArrayObjects[this.CONTEXT_UID];\n const gl = this.gl;\n const buffers = geometry.buffers;\n const bufferSystem = this.renderer?.buffer;\n\n geometry.disposeRunner.remove(this);\n\n if (!vaos)\n {\n return;\n }\n\n // bufferSystem may have already been destroyed..\n // if this is the case, there is no need to destroy the geometry buffers...\n // they already have been!\n if (bufferSystem)\n {\n for (let i = 0; i < buffers.length; i++)\n {\n const buf = buffers[i]._glBuffers[this.CONTEXT_UID];\n\n // my be null as context may have changed right before the dispose is called\n if (buf)\n {\n buf.refCount--;\n if (buf.refCount === 0 && !contextLost)\n {\n bufferSystem.dispose(buffers[i], contextLost);\n }\n }\n }\n }\n\n if (!contextLost)\n {\n for (const vaoId in vaos)\n {\n // delete only signatures, everything else are copies\n if (vaoId[0] === 'g')\n {\n const vao = vaos[vaoId];\n\n if (this._activeVao === vao)\n {\n this.unbind();\n }\n gl.deleteVertexArray(vao);\n }\n }\n }\n\n delete geometry.glVertexArrayObjects[this.CONTEXT_UID];\n }\n\n /**\n * Dispose all WebGL resources of all managed geometries.\n * @param [contextLost=false] - If context was lost, we suppress `gl.delete` calls\n */\n disposeAll(contextLost?: boolean): void\n {\n const all: Array<any> = Object.keys(this.managedGeometries);\n\n for (let i = 0; i < all.length; i++)\n {\n this.disposeGeometry(this.managedGeometries[all[i]], contextLost);\n }\n }\n\n /**\n * Activate vertex array object.\n * @param geometry - Geometry instance.\n * @param program - Shader program instance.\n */\n protected activateVao(geometry: Geometry, program: Program): void\n {\n const gl = this.gl;\n const CONTEXT_UID = this.CONTEXT_UID;\n const bufferSystem = this.renderer.buffer;\n const buffers = geometry.buffers;\n const attributes = geometry.attributes;\n\n if (geometry.indexBuffer)\n {\n // first update the index buffer if we have one..\n bufferSystem.bind(geometry.indexBuffer);\n }\n\n let lastBuffer = null;\n\n // add a new one!\n for (const j in attributes)\n {\n const attribute = attributes[j];\n const buffer = buffers[attribute.buffer];\n const glBuffer = buffer._glBuffers[CONTEXT_UID];\n\n if (program.attributeData[j])\n {\n if (lastBuffer !== glBuffer)\n {\n bufferSystem.bind(buffer);\n\n lastBuffer = glBuffer;\n }\n\n const location = program.attributeData[j].location;\n\n // TODO introduce state again\n // we can optimise this for older devices that have no VAOs\n gl.enableVertexAttribArray(location);\n\n gl.vertexAttribPointer(location,\n attribute.size,\n attribute.type || gl.FLOAT,\n attribute.normalized,\n attribute.stride,\n attribute.start);\n\n if (attribute.instance)\n {\n // TODO calculate instance count based of this...\n if (this.hasInstance)\n {\n gl.vertexAttribDivisor(location, attribute.divisor);\n }\n else\n {\n throw new Error('geometry error, GPU Instancing is not supported on this device');\n }\n }\n }\n }\n }\n\n /**\n * Draws the currently bound geometry.\n * @param type - The type primitive to render.\n * @param size - The number of elements to be rendered. 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