Add files

src/graphics/graphics-library/compiling/check-program.ts

@@ -0,0 +1,13 @@
+import { checkShader } from './check-shader';
+
+export const checkProgram = (gl: WebGL2RenderingContext, program: WebGLProgram) => {
+  const success = gl.getProgramParameter(program, gl.LINK_STATUS);
+
+  if (!success) {
+    gl.getAttachedShaders(program)?.forEach((s) => {
+      checkShader(gl, s);
+    });
+
+    throw new Error(gl.getProgramInfoLog(program)!);
+  }
+};

src/graphics/graphics-library/compiling/check-shader.ts

@@ -0,0 +1,7 @@
+export const checkShader = (gl: WebGL2RenderingContext, shader: WebGLShader) => {
+  const success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+
+  if (!success) {
+    throw new Error(gl.getShaderInfoLog(shader)!);
+  }
+};

src/graphics/graphics-library/compiling/create-program.ts

@@ -0,0 +1,48 @@
+import { waitWhileFalse } from '../../../helper/wait-while-false';
+import { tryEnableExtension } from '../helper/enable-extension';
+import { checkProgram } from './check-program';
+import { createShader } from './create-shader';
+
+export const createProgram = async (
+  gl: WebGL2RenderingContext,
+  vertexShaderSource: string,
+  fragmentShaderSource: string,
+  substitutions: { [name: string]: string }
+): Promise<WebGLProgram> => {
+  const program = gl.createProgram();
+
+  if (!program) {
+    throw new Error('Could not create program');
+  }
+
+  const extension = tryEnableExtension(gl, 'KHR_parallel_shader_compile');
+
+  const vertexShader = createShader(
+    gl,
+    gl.VERTEX_SHADER,
+    vertexShaderSource,
+    substitutions
+  );
+  gl.attachShader(program, vertexShader);
+
+  const fragmentShader = createShader(
+    gl,
+    gl.FRAGMENT_SHADER,
+    fragmentShaderSource,
+    substitutions
+  );
+  gl.attachShader(program, fragmentShader);
+
+  gl.linkProgram(program);
+
+  if (extension) {
+    const checkCompileStatus = () =>
+      gl.getProgramParameter(program, extension.COMPLETION_STATUS_KHR);
+
+    await waitWhileFalse(checkCompileStatus);
+  }
+
+  checkProgram(gl, program);
+
+  return program;
+};

src/graphics/graphics-library/compiling/create-shader.ts

@@ -0,0 +1,22 @@
+export const createShader = (
+  gl: WebGL2RenderingContext,
+  type: GLenum,
+  source: string,
+  substitutions: { [name: string]: string }
+): WebGLShader => {
+  source = source.replace(/{(.+)}/gm, (_, name: string): string => {
+    const value = substitutions[name];
+    return Number.isInteger(value) ? `${value}.0` : value;
+  });
+
+  const shader = gl.createShader(type);
+
+  if (!shader) {
+    throw new Error('Could not create shader');
+  }
+
+  gl.shaderSource(shader, source);
+  gl.compileShader(shader);
+
+  return shader;
+};

src/graphics/graphics-library/frame-buffer/default-frame-buffer.ts

@@ -0,0 +1,19 @@
+import { FrameBuffer } from './frame-buffer';
+
+export class DefaultFrameBuffer extends FrameBuffer {
+  constructor(gl: WebGL2RenderingContext) {
+    super(gl);
+    this.frameBuffer = null;
+    this.setSize();
+  }
+
+  public setSize(): boolean {
+    const hasChanged = super.setSize();
+    if (hasChanged) {
+      this.gl.canvas.width = this.size.x;
+      this.gl.canvas.height = this.size.y;
+    }
+
+    return hasChanged;
+  }
+}

src/graphics/graphics-library/frame-buffer/frame-buffer.ts

@@ -0,0 +1,46 @@
+import { vec2 } from 'gl-matrix';
+import { settings } from '../../settings';
+
+export abstract class FrameBuffer {
+  public renderScale = 1;
+  public enableHighDpiRendering = settings.enableHighDpiRendering;
+
+  protected size = vec2.create();
+
+  // null means the default framebuffer
+  protected frameBuffer: WebGLFramebuffer | null = null;
+
+  constructor(protected gl: WebGL2RenderingContext) {}
+
+  public bindAndClear(colorInput?: WebGLTexture) {
+    this.gl.bindFramebuffer(this.gl.FRAMEBUFFER, this.frameBuffer);
+
+    if (colorInput) {
+      this.gl.bindTexture(this.gl.TEXTURE_2D, colorInput);
+    }
+
+    this.gl.viewport(0, 0, this.size.x, this.size.y);
+    this.gl.clearColor(0, 0, 0, 0);
+    this.gl.clear(this.gl.COLOR_BUFFER_BIT | this.gl.DEPTH_BUFFER_BIT);
+  }
+
+  public setSize(): boolean {
+    const realToCssPixels =
+      (this.enableHighDpiRendering ? window.devicePixelRatio : 1) * this.renderScale;
+
+    const canvasWidth = (this.gl.canvas as HTMLCanvasElement).clientWidth;
+    const canvasHeight = (this.gl.canvas as HTMLCanvasElement).clientHeight;
+
+    const displayWidth = Math.floor(canvasWidth * realToCssPixels);
+    const displayHeight = Math.floor(canvasHeight * realToCssPixels);
+
+    const oldSize = vec2.clone(this.getSize());
+    this.size = vec2.fromValues(displayWidth, displayHeight);
+
+    return this.size.x != oldSize.x || this.size.y != oldSize.y;
+  }
+
+  public getSize(): vec2 {
+    return this.size;
+  }
+}

src/graphics/graphics-library/frame-buffer/intermediate-frame-buffer.ts

@@ -0,0 +1,97 @@
+import { enableExtension } from '../helper/enable-extension';
+import { FrameBuffer } from './frame-buffer';
+
+export class IntermediateFrameBuffer extends FrameBuffer {
+  private frameTexture: WebGLTexture;
+  private floatLinearEnabled = false;
+
+  constructor(gl: WebGL2RenderingContext) {
+    super(gl);
+
+    enableExtension(gl, 'EXT_color_buffer_float');
+
+    try {
+      enableExtension(gl, 'OES_texture_float_linear');
+      this.floatLinearEnabled = true;
+    } catch {
+      // it's okay
+    }
+
+    const texture = this.gl.createTexture();
+    if (!texture) {
+      throw new Error('Could not create texture');
+    }
+    this.frameTexture = texture;
+    this.configureTexture();
+
+    const frameBuffer = this.gl.createFramebuffer();
+    if (!frameBuffer) {
+      throw new Error('Could not create frame buffer');
+    }
+    this.frameBuffer = frameBuffer;
+    this.configureFrameBuffer();
+
+    this.setSize();
+  }
+
+  public get colorTexture(): WebGLTexture {
+    return this.frameTexture;
+  }
+
+  public setSize(): boolean {
+    const hasChanged = super.setSize();
+    if (hasChanged) {
+      this.gl.bindTexture(this.gl.TEXTURE_2D, this.frameTexture);
+
+      this.gl.texImage2D(
+        this.gl.TEXTURE_2D,
+        0,
+        this.gl.RG16F,
+        this.size.x,
+        this.size.y,
+        0,
+        this.gl.RG,
+        this.gl.FLOAT,
+        null
+      );
+    }
+
+    return hasChanged;
+  }
+
+  private configureTexture() {
+    this.gl.bindTexture(this.gl.TEXTURE_2D, this.frameTexture);
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_MAG_FILTER,
+      this.floatLinearEnabled ? this.gl.LINEAR : this.gl.NEAREST
+    );
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_MIN_FILTER,
+      this.floatLinearEnabled ? this.gl.LINEAR : this.gl.NEAREST
+    );
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_WRAP_S,
+      this.gl.CLAMP_TO_EDGE
+    );
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_WRAP_T,
+      this.gl.CLAMP_TO_EDGE
+    );
+  }
+
+  private configureFrameBuffer() {
+    this.gl.bindFramebuffer(this.gl.FRAMEBUFFER, this.frameBuffer);
+    const attachmentPoint = this.gl.COLOR_ATTACHMENT0;
+    this.gl.framebufferTexture2D(
+      this.gl.FRAMEBUFFER,
+      attachmentPoint,
+      this.gl.TEXTURE_2D,
+      this.frameTexture,
+      0
+    );
+  }
+}

src/graphics/graphics-library/helper/enable-extension.ts

@@ -0,0 +1,39 @@
+const extensions: Map<string, any> = new Map();
+
+const printExtensions = () => {
+  const values = {};
+  for (const [k, v] of extensions.entries()) {
+    values[k] = v !== null;
+  }
+  //InfoText.modifyRecord('extensions', values);
+};
+
+export const tryEnableExtension = (
+  gl: WebGL2RenderingContext,
+  name: string
+): any | null => {
+  if (extensions.has(name)) {
+    return extensions.get(name);
+  }
+
+  let extension = null;
+  if (gl.getSupportedExtensions()!.indexOf(name) != -1) {
+    extension = gl.getExtension(name);
+  }
+
+  extensions.set(name, extension);
+
+  printExtensions();
+
+  return extension;
+};
+
+export const enableExtension = (gl: WebGL2RenderingContext, name: string): any => {
+  const extension = tryEnableExtension(gl, name);
+
+  if (extension === null) {
+    throw new Error(`Unsupported extension ${name}`);
+  }
+
+  return extension;
+};

src/graphics/graphics-library/helper/get-webgl2-context.ts

@@ -0,0 +1,9 @@
+export const getWebGl2Context = (canvas: HTMLCanvasElement): WebGL2RenderingContext => {
+  const gl = canvas.getContext('webgl2');
+
+  if (!gl) {
+    throw new Error('WebGl2 is not supported');
+  }
+
+  return gl;
+};

src/graphics/graphics-library/helper/load-uniform.ts

@@ -0,0 +1,82 @@
+import { mat3, ReadonlyVec3, vec2, vec3 } from 'gl-matrix';
+
+const loaderMat3 = mat3.create();
+
+export const loadUniform = (
+  gl: WebGL2RenderingContext,
+  value: any,
+  type: GLenum,
+  location: WebGLUniformLocation
+): any => {
+  const converters: Map<
+    GLenum,
+    (gl: WebGL2RenderingContext, value: any, location: WebGLUniformLocation) => void
+  > = new Map();
+  {
+    converters.set(WebGL2RenderingContext.FLOAT, (gl, v, l) => {
+      if (v instanceof Array) {
+        if (v.length == 0) {
+          return;
+        }
+
+        gl.uniform1fv(l, new Float32Array(v));
+      } else {
+        gl.uniform1f(l, v);
+      }
+    });
+
+    converters.set(WebGL2RenderingContext.FLOAT_VEC2, (gl, v: vec2 | Array<vec2>, l) => {
+      if (v.length == 0) {
+        return;
+      }
+
+      if (v[0] instanceof Array) {
+        const result = new Float32Array(v.length * 2);
+
+        for (let i = 0; i < v.length; i++) {
+          result[2 * i] = (v[i] as Array<number>).x;
+          result[2 * i + 1] = (v[i] as Array<number>).y;
+        }
+
+        gl.uniform2fv(l, result);
+      } else {
+        gl.uniform2fv(l, v as vec2);
+      }
+    });
+
+    converters.set(
+      WebGL2RenderingContext.FLOAT_VEC3,
+      (gl, v: ReadonlyVec3 | Array<vec3>, l) => {
+        if (v.length == 0) {
+          return;
+        }
+
+        if (v[0] instanceof Array) {
+          const result = new Float32Array(v.length * 3);
+
+          for (let i = 0; i < v.length; i++) {
+            result[3 * i] = (v[i] as Array<number>)[0];
+            result[3 * i + 1] = (v[i] as Array<number>)[1];
+            result[3 * i + 2] = (v[i] as Array<number>)[2];
+          }
+
+          gl.uniform3fv(l, result);
+        } else {
+          gl.uniform3fv(l, v as vec3);
+        }
+      }
+    );
+
+    converters.set(WebGL2RenderingContext.FLOAT_MAT3, (gl, v, l) => {
+      gl.uniformMatrix3fv(l, true, mat3.fromMat2d(loaderMat3, v));
+    });
+
+    converters.set(WebGL2RenderingContext.BOOL, (gl, v, l) => gl.uniform1i(l, v));
+
+    if (!converters.has(type)) {
+      throw new Error(`Unimplemented webgl type: ${type}`);
+    }
+
+    converters.get(type)!(gl, value, location);
+  }
+};

src/graphics/graphics-library/helper/stopwatch.ts

@@ -0,0 +1,49 @@
+import { enableExtension } from './enable-extension';
+
+// https://www.khronos.org/registry/webgl/extensions/EXT_disjoint_timer_query_webgl2/
+
+export class WebGlStopwatch {
+  private timerExtension: any;
+  private timerQuery?: WebGLQuery;
+  private isReady = true;
+  private resultsInNanoSeconds?: number;
+
+  constructor(private gl: WebGL2RenderingContext) {
+    this.timerExtension = enableExtension(gl, 'EXT_disjoint_timer_query_webgl2');
+  }
+
+  public start() {
+    if (this.isReady) {
+      this.timerQuery = this.gl.createQuery()!;
+      this.gl.beginQuery(this.timerExtension.TIME_ELAPSED_EXT, this.timerQuery);
+    }
+  }
+
+  public stop() {
+    if (this.isReady) {
+      this.gl.endQuery(this.timerExtension.TIME_ELAPSED_EXT);
+      this.isReady = false;
+    }
+
+    const available = this.gl.getQueryParameter(
+      this.timerQuery!,
+      this.gl.QUERY_RESULT_AVAILABLE
+    );
+    const disjoint = this.gl.getParameter(this.timerExtension.GPU_DISJOINT_EXT);
+
+    if (available && !disjoint) {
+      this.resultsInNanoSeconds = this.gl.getQueryParameter(
+        this.timerQuery!,
+        this.gl.QUERY_RESULT
+      );
+
+      //InfoText.modifyRecord('Draw time', `${this.resultsInMilliSeconds.toFixed(2)} ms`);
+
+      this.isReady = true;
+    }
+  }
+
+  public get resultsInMilliSeconds(): number {
+    return this.resultsInNanoSeconds! / 1000 / 1000;
+  }
+}

src/graphics/graphics-library/program/fragment-shader-only-program.ts

@@ -0,0 +1,52 @@
+import Program from './program';
+
+export class FragmentShaderOnlyProgram extends Program {
+  private vao?: WebGLVertexArrayObject;
+
+  constructor(
+    gl: WebGL2RenderingContext,
+    sources: [string, string],
+    substitutions: { [name: string]: string }
+  ) {
+    super(gl, sources, substitutions);
+  }
+
+  public async initialize(): Promise<void> {
+    await super.initialize();
+    this.prepareScreenQuad('vertexPosition');
+  }
+
+  public bind() {
+    super.bind();
+    this.gl.bindVertexArray(this.vao!);
+  }
+
+  public draw() {
+    this.gl.drawArrays(this.gl.TRIANGLE_STRIP, 0, 4);
+  }
+
+  private prepareScreenQuad(attributeName: string) {
+    const positionAttributeLocation = this.gl.getAttribLocation(
+      this.program!,
+      attributeName
+    );
+
+    const positionBuffer = this.gl.createBuffer();
+
+    this.gl.bindBuffer(this.gl.ARRAY_BUFFER, positionBuffer);
+    this.gl.bufferData(
+      this.gl.ARRAY_BUFFER,
+      new Float32Array([-1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0]),
+      this.gl.STATIC_DRAW
+    );
+    const vao = this.gl.createVertexArray();
+    if (!vao) {
+      throw new Error('Could not create vertex array object');
+    }
+    this.vao = vao;
+
+    this.gl.bindVertexArray(this.vao);
+    this.gl.enableVertexAttribArray(positionAttributeLocation);
+    this.gl.vertexAttribPointer(positionAttributeLocation, 2, this.gl.FLOAT, false, 0, 0);
+  }
+}

src/graphics/graphics-library/program/i-program.ts

@@ -0,0 +1,9 @@
+import { vec2 } from 'gl-matrix';
+
+export interface IProgram {
+  initialize(): Promise<void>;
+  setDrawingRectangleUV(bottomLeft: vec2, size: vec2): void;
+  bindAndSetUniforms(values: { [name: string]: any }): void;
+  draw(): void;
+  delete(): void;
+}

src/graphics/graphics-library/program/program.ts

@@ -0,0 +1,102 @@
+import { mat2d, vec2 } from 'gl-matrix';
+import { settings } from '../../settings';
+import { createProgram } from '../compiling/create-program';
+import { loadUniform } from '../helper/load-uniform';
+import { IProgram } from './i-program';
+
+export default abstract class Program implements IProgram {
+  protected program?: WebGLProgram;
+
+  private programPromise: Promise<WebGLProgram>;
+  private modelTransform = mat2d.identity(mat2d.create());
+  private readonly ndcToUv = mat2d.fromValues(0.5, 0, 0, 0.5, 0.5, 0.5);
+  private uniforms: Array<{
+    name: Array<string>;
+    location: WebGLUniformLocation;
+    type: GLenum;
+  }> = [];
+
+  constructor(
+    protected gl: WebGL2RenderingContext,
+    [vertexShaderSource, fragmentShaderSource]: [string, string],
+    substitutions: { [name: string]: string }
+  ) {
+    substitutions = { ...settings.shaderMacros, ...substitutions };
+
+    this.programPromise = createProgram(
+      this.gl,
+      vertexShaderSource,
+      fragmentShaderSource,
+      substitutions
+    );
+  }
+
+  public async initialize(): Promise<void> {
+    this.program = await this.programPromise;
+    this.queryUniforms();
+  }
+
+  public bindAndSetUniforms(values: { [name: string]: any }) {
+    this.bind();
+    this.setUniforms({ modelTransform: this.modelTransform, ...values });
+  }
+
+  public setDrawingRectangleUV(bottomLeft: vec2, size: vec2) {
+    mat2d.invert(this.modelTransform, this.ndcToUv);
+    mat2d.translate(this.modelTransform, this.modelTransform, bottomLeft);
+    mat2d.scale(this.modelTransform, this.modelTransform, size);
+    mat2d.multiply(this.modelTransform, this.modelTransform, this.ndcToUv);
+  }
+
+  public setUniforms(values: { [name: string]: any }) {
+    this.uniforms.forEach(({ name, location, type }) => {
+      const value = name.reduce(
+        (prev, prop) => (prev !== null && prop in prev ? prev[prop] : null),
+        values
+      );
+
+      if (value !== null) {
+        loadUniform(this.gl, value, type, location);
+      }
+    });
+  }
+
+  public delete() {
+    this.gl.getAttachedShaders(this.program!)?.forEach((s) => this.gl.deleteShader(s));
+    this.gl.deleteProgram(this.program!);
+  }
+
+  public abstract draw(): void;
+
+  protected bind() {
+    this.gl.useProgram(this.program!);
+  }
+
+  private queryUniforms() {
+    const uniformCount = this.gl.getProgramParameter(
+      this.program!,
+      WebGL2RenderingContext.ACTIVE_UNIFORMS
+    );
+
+    for (let i = 0; i < uniformCount; i++) {
+      const glUniform = this.gl.getActiveUniform(this.program!, i)!;
+
+      this.uniforms.push({
+        name: glUniform.name.split(/\[|\]\.|\]|\./).filter((p) => p !== ''),
+        location: this.gl.getUniformLocation(this.program!, glUniform.name)!,
+        type: glUniform.type,
+      });
+    }
+
+    this.uniforms.map((u1) => {
+      const isSingle =
+        this.uniforms.filter((u2) => u2.name.includes(u1.name[0])).length == 1;
+
+      if (u1.name.includes('0') && isSingle) {
+        u1.name = u1.name.slice(0, -1);
+      }
+
+      return u1;
+    });
+  }
+}

src/graphics/graphics-library/program/uniform-array-autoscaling-program.ts

@@ -0,0 +1,94 @@
+import { mat2d, vec2 } from 'gl-matrix';
+import { getCombinations } from '../../../helper/get-combinations';
+import { last } from '../../../helper/last';
+import { IDrawableDescriptor } from '../../drawables/i-drawable-descriptor';
+import { FragmentShaderOnlyProgram } from './fragment-shader-only-program';
+import { IProgram } from './i-program';
+
+export class UniformArrayAutoScalingProgram implements IProgram {
+  private programs: Array<{
+    program: FragmentShaderOnlyProgram;
+    values: Array<number>;
+  }> = [];
+
+  private current?: FragmentShaderOnlyProgram;
+  private drawingRectangleBottomLeft = vec2.fromValues(0, 0);
+  private drawingRectangleSize = vec2.fromValues(1, 1);
+
+  constructor(
+    private gl: WebGL2RenderingContext,
+    shaderSources: [string, string],
+    private descriptors: Array<IDrawableDescriptor>
+  ) {
+    const names = descriptors.map((o) => o.countMacroName);
+    for (const combination of getCombinations(
+      descriptors.map((o) => o.shaderCombinationSteps)
+    )) {
+      this.createProgram(names, combination, shaderSources);
+    }
+  }
+
+  public async initialize(): Promise<void> {
+    await Promise.all(this.programs.map((p) => p.program.initialize()));
+  }
+
+  public bindAndSetUniforms(uniforms: { [name: string]: any }): void {
+    const values = this.descriptors.map((d) =>
+      uniforms[d.uniformName] ? uniforms[d.uniformName].length : 0
+    );
+
+    const closest = this.programs.find((p) => p.values.every((v, i) => v >= values[i]));
+
+    this.current = closest ? closest.program : last(this.programs)?.program;
+
+    if (closest) {
+      this.descriptors.map((d, i) => {
+        const difference = closest.values[i] - values[i];
+        for (let i = 0; i < difference; i++) {
+          d.empty.serializeToUniforms(uniforms, 0, mat2d.create());
+        }
+      });
+    }
+
+    this.current?.setDrawingRectangleUV(
+      this.drawingRectangleBottomLeft,
+      this.drawingRectangleSize
+    );
+    this.current?.bindAndSetUniforms(uniforms);
+  }
+
+  public setDrawingRectangleUV(bottomLeft: vec2, size: vec2) {
+    this.drawingRectangleBottomLeft = bottomLeft;
+    this.drawingRectangleSize = size;
+  }
+
+  public draw(): void {
+    if (!this.current) {
+      throw new Error('Method bindAndSetUniforms have not been called yet');
+    }
+
+    this.current.draw();
+  }
+
+  public delete(): void {
+    this.programs.forEach((p) => p.program.delete());
+  }
+
+  private createProgram(
+    names: Array<string>,
+    combination: Array<number>,
+    shaderSources: [string, string]
+  ): FragmentShaderOnlyProgram {
+    const substitutions = {};
+    names.forEach((v, i) => (substitutions[v] = combination[i].toString()));
+
+    const program = new FragmentShaderOnlyProgram(this.gl, shaderSources, substitutions);
+
+    this.programs.push({
+      program,
+      values: combination,
+    });
+
+    return program;
+  }
+}