@tolokoban/tgd
Version:
ToloGameDev library for WebGL2
161 lines • 15.9 kB
JavaScript
import { TgdPainter } from "./../painter.js";
import { TgdDataset } from "./../../dataset/dataset.js";
import { TgdVertexArray } from "./../../vao/index.js";
import { TgdShaderVertex } from "./../../shader/vertex.js";
import { TgdShaderFragment } from "./../../shader/fragment.js";
import { TgdProgram } from "./../../program/index.js";
export class TgdPainterFilter extends TgdPainter {
constructor(context, options) {
var _a, _b, _c;
super();
this.context = context;
this.z = 0;
this.textures = null;
this.texturesWith = -1;
this.texturesHeight = -1;
this.z = (_a = options.z) !== null && _a !== void 0 ? _a : 0.999999;
this.texture = options.texture;
const filters = (_b = options.filters) !== null && _b !== void 0 ? _b : [];
if (filters.length === 0) {
throw new Error(`[TgdPainterFilter] filters is expected to have at least one element!`);
}
const programs = filters.map(filter => {
const vert = new TgdShaderVertex({
attributes: {
attPoint: "vec2",
attUV: "vec2",
},
varying: {
varUV: "vec2",
},
uniforms: {
uniZ: "float",
},
mainCode: [
"varUV = attUV;",
"gl_Position = vec4(",
["attPoint,", "uniZ,", "1.0"],
");",
],
}).code;
const frag = new TgdShaderFragment({
uniforms: Object.assign({ uniWidth: "float", uniHeight: "float", uniTexture: "sampler2D" }, filter.uniforms),
varying: {
varUV: "vec2",
},
mainCode: filter.fragmentShaderCode,
functions: filter.extraFunctions,
}).code;
return new TgdProgram(context.gl, { vert, frag });
});
const vaos = programs.map(program => createVAO(context, program, options.flipY ? -1 : +1));
this.program = programs.pop();
this.programs = programs;
this.filter = filters.pop();
this.filters = filters;
const vao = vaos.pop();
this.vaos = vaos;
const count = vaos.length + (options.flipY ? 1 : 0);
this.vao = count % 2 === 0 ? vao : createVAO(context, this.program, -1);
const framebuffer = context.gl.createFramebuffer();
if (!framebuffer)
throw new Error("Unable to create a WebGL Framebuffer!");
this.framebuffer = framebuffer;
this.name = (_c = options.name) !== null && _c !== void 0 ? _c : `Filter/${this.name}`;
}
delete() {
const { context, textures, vaos, vao, framebuffer } = this;
const { gl } = context;
for (const vao of vaos)
vao.delete();
vao.delete();
gl.deleteFramebuffer(framebuffer);
if (textures) {
for (const tex of textures)
gl.deleteTexture(tex);
}
}
paint(time, delay) {
const { vaos, texture, z, context } = this;
const { gl } = this.program;
let inputTexture = texture === null || texture === void 0 ? void 0 : texture.glTexture;
if (!inputTexture) {
console.warn("[TgdPainterFilter] Input texture is undefined!");
return;
}
if (vaos.length > 0) {
const { programs, filters, framebuffer } = this;
const currentFramebuffer = gl.getParameter(gl.FRAMEBUFFER_BINDING);
const textures = this.getTextures(gl);
let texIndex = 0;
let outputTexture = textures[texIndex];
for (const [index, vao] of vaos.entries()) {
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, outputTexture, 0);
paintOneFilter(time, delay, vao, programs[index], filters[index], inputTexture, z, context);
texIndex = 1 - texIndex;
inputTexture = outputTexture;
outputTexture = textures[texIndex];
}
gl.bindFramebuffer(gl.FRAMEBUFFER, currentFramebuffer);
}
paintOneFilter(time, delay, this.vao, this.program, this.filter, inputTexture, z, context);
gl.bindVertexArray(null);
}
getTextures(gl) {
var _a;
const { width, height } = (_a = this.texture) !== null && _a !== void 0 ? _a : { width: 64, height: 64 };
if (this.textures &&
this.texturesWith === width &&
this.texturesHeight === height) {
return [...this.textures];
}
if (this.textures) {
for (const tex of this.textures)
gl.deleteTexture(tex);
}
this.texturesWith = width;
this.texturesHeight = height;
this.textures = [0, 1].map(() => {
const texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
return texture;
});
return this.textures;
}
}
function paintOneFilter(time, delay, vao, program, filter, texture, z, context) {
const { gl } = program;
program.use();
program.uniform1f("uniZ", z);
filter.setUniforms({ context, program, time, delay });
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, texture);
program.uniform1i("uniTexture", 0);
vao.bind();
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
}
function createVAO(context, program, flipY = +1) {
const dataset = new TgdDataset({
attPoint: "vec2",
attUV: "vec2",
});
// prettier-ignore
dataset.set("attPoint", new Float32Array([
-1, +1 * flipY,
+1, +1 * flipY,
-1, -1 * flipY,
+1, -1 * flipY,
]));
dataset.set("attUV", new Float32Array([0, 0, 1, 0, 0, 1, 1, 1]));
const vao = new TgdVertexArray(context.gl, program, [dataset]);
if (!vao)
throw new Error("Unable to create WebGL VAO!");
return vao;
}
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