91 lines
2.9 KiB
TypeScript
91 lines
2.9 KiB
TypeScript
// pathfinder/client/src/aa-strategy.ts
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//
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// Copyright © 2017 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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import * as glmatrix from 'gl-matrix';
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import {Renderer} from './renderer';
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import {DemoView} from './view';
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export type AntialiasingStrategyName = 'none' | 'ssaa' | 'xcaa';
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export type DirectRenderingMode = 'none' | 'color' | 'two-pass';
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export type SubpixelAAType = 'none' | 'medium';
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export type StemDarkeningMode = 'none' | 'dark';
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export abstract class AntialiasingStrategy {
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// The type of direct rendering that should occur, if any.
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abstract readonly directRenderingMode: DirectRenderingMode;
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// Prepares any OpenGL data. This is only called on startup and canvas resize.
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init(renderer: Renderer): void {
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this.setFramebufferSize(renderer);
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}
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// Uploads any mesh data. This is called whenever a new set of meshes is supplied.
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abstract attachMeshes(renderer: Renderer): void;
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// This is called whenever the framebuffer has changed.
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abstract setFramebufferSize(renderer: Renderer): void;
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// Returns the transformation matrix that should be applied when directly rendering.
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abstract get transform(): glmatrix.mat4;
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// Called before direct rendering.
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//
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// Typically, this redirects direct rendering to a framebuffer of some sort.
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abstract prepareForDirectRendering(renderer: Renderer): void;
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// Called after direct rendering.
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//
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// This usually performs the actual antialiasing.
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abstract antialias(renderer: Renderer): void;
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// Called after antialiasing.
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//
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// This usually blits to the real framebuffer.
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abstract resolve(renderer: Renderer): void;
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}
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export class NoAAStrategy extends AntialiasingStrategy {
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framebufferSize: glmatrix.vec2;
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constructor(level: number, subpixelAA: SubpixelAAType) {
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super();
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this.framebufferSize = glmatrix.vec2.create();
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}
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attachMeshes(renderer: Renderer) {}
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setFramebufferSize(renderer: Renderer) {
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this.framebufferSize = renderer.destAllocatedSize;
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}
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get transform(): glmatrix.mat4 {
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return glmatrix.mat4.create();
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}
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prepareForDirectRendering(renderer: Renderer) {
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const renderContext = renderer.renderContext;
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renderContext.gl.bindFramebuffer(renderContext.gl.FRAMEBUFFER, renderer.destFramebuffer);
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renderContext.gl.viewport(0, 0, this.framebufferSize[0], this.framebufferSize[1]);
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renderContext.gl.disable(renderContext.gl.SCISSOR_TEST);
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}
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antialias(renderer: Renderer) {}
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resolve(renderer: Renderer) {}
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get directRenderingMode(): DirectRenderingMode {
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return 'color';
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}
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}
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