cables_dev/cables/src/core/cg/cg_texture.js

const DEFAULT_TEXTURE_SIZE = 8;

export default class CgTexture
{
    constructor(options = {})
    {
        this.id = CABLES.uuid();
        this.width = 0;
        this.height = 0;
        this.name = "unknown";

        options = options || {};
        this.pixelFormat = options.pixelFormat || CgTexture.PFORMATSTR_RGBA8UB;

        this.name = options.name || "unknown";

        if (!options.width) options.width = DEFAULT_TEXTURE_SIZE;
        if (!options.height) options.height = DEFAULT_TEXTURE_SIZE;
    }
}


CgTexture.getDefaultTextureData = (name, size, options = {}) =>
{
    if (name == "empty")
    {
        return new Uint8Array(size * size * 4).fill(0);
    }
    else
    if (name == "color")
    {
        const data = new Uint8Array(size * size * 4);
        let r = options.r || 1;
        let g = options.g || 1;
        let b = options.b || 1;

        for (let x = 0; x < size * size; x++)
        {
            data[x * 4 + 0] = r;
            data[x * 4 + 1] = g;
            data[x * 4 + 2] = b;
            data[x * 4 + 3] = 255;
        }
        return data;
    }
    else
    if (name == "randomUInt")
    {
        const data = new Uint8Array(size * size * 4);

        for (let x = 0; x < size * size; x++)
        {
            data[x * 4 + 0] = Math.random() * 255;
            data[x * 4 + 1] = Math.random() * 255;
            data[x * 4 + 2] = Math.random() * 255;
            data[x * 4 + 3] = 255;
        }
        return data;
    }
    else
    if (name == "random" || name == "randomFloat")
    {
        const data = new Float32Array(size * size * 4);

        for (let x = 0; x < size * size; x++)
        {
            data[x * 4 + 0] = (Math.random() - 0.5) * 2.0;
            data[x * 4 + 1] = (Math.random() - 0.5) * 2.0;
            data[x * 4 + 2] = (Math.random() - 0.5) * 2.0;
            data[x * 4 + 3] = 1;
        }
        return data;
    }
    else
    if (name == "stripes")
    {
        const arr = [];

        let r = options.r;
        let g = options.g;
        let b = options.b;

        if (r === undefined)r = 1;
        if (g === undefined)g = 1;
        if (b === undefined)b = 1;

        for (let y = 0; y < size; y++)
        {
            for (let x = 0; x < size; x++)
            {
                if ((x + y) % 64 < 32)
                {
                    arr.push((200 + (y / size) * 25 + (x / size) * 25) * r);
                    arr.push((200 + (y / size) * 25 + (x / size) * 25) * g);
                    arr.push((200 + (y / size) * 25 + (x / size) * 25) * b);
                }
                else
                {
                    arr.push((40 + (y / size) * 25 + (x / size) * 25) * r);
                    arr.push((40 + (y / size) * 25 + (x / size) * 25) * g);
                    arr.push((40 + (y / size) * 25 + (x / size) * 25) * b);
                }
                arr.push(255);
            }
        }

        return new Uint8Array(arr);
    }
    else
    {
        console.warn("unknown default texture", name);
        return CgTexture.getDefaultTextureData("stripes", size, { "r": 1, "g": 0, "b": 0 });
    }
};



CgTexture.FILTER_NEAREST = 0;
CgTexture.FILTER_LINEAR = 1;
CgTexture.FILTER_MIPMAP = 2;

CgTexture.WRAP_REPEAT = 0;
CgTexture.WRAP_MIRRORED_REPEAT = 1;
CgTexture.WRAP_CLAMP_TO_EDGE = 2;

CgTexture.TYPE_DEFAULT = 0;
CgTexture.TYPE_DEPTH = 1;
CgTexture.TYPE_FLOAT = 2;


CgTexture.PFORMATSTR_RGB565 = "RGB 5/6/5bit ubyte";

CgTexture.PFORMATSTR_R8UB = "R 8bit ubyte";
CgTexture.PFORMATSTR_RG8UB = "RG 8bit ubyte";
CgTexture.PFORMATSTR_RGB8UB = "RGB 8bit ubyte";
CgTexture.PFORMATSTR_RGBA8UB = "RGBA 8bit ubyte";

CgTexture.PFORMATSTR_SRGBA8 = "SRGBA 8bit ubyte";

CgTexture.PFORMATSTR_R11FG11FB10F = "RGB 11/11/10bit float";

CgTexture.PFORMATSTR_R16F = "R 16bit float";
CgTexture.PFORMATSTR_RG16F = "RG 16bit float";
CgTexture.PFORMATSTR_RGB16F = "RGB 16bit float";
CgTexture.PFORMATSTR_RGBA16F = "RGBA 16bit float";


CgTexture.PFORMATSTR_R32F = "R 32bit float";
CgTexture.PFORMATSTR_RG32F = "RG 32bit float";
CgTexture.PFORMATSTR_RGB32F = "RGB 32bit float";
CgTexture.PFORMATSTR_RGBA32F = "RGBA 32bit float";

CgTexture.PFORMATSTR_DEPTH = "DEPTH";


CgTexture.PIXELFORMATS = [

    CgTexture.PFORMATSTR_RGB565,

    CgTexture.PFORMATSTR_R8UB,
    CgTexture.PFORMATSTR_RG8UB,
    CgTexture.PFORMATSTR_RGB8UB,
    CgTexture.PFORMATSTR_RGBA8UB,

    CgTexture.PFORMATSTR_SRGBA8,

    CgTexture.PFORMATSTR_R11FG11FB10F,
    CgTexture.PFORMATSTR_R16F,
    CgTexture.PFORMATSTR_RG16F,
    CgTexture.PFORMATSTR_RGBA16F,

    CgTexture.PFORMATSTR_R32F,
    CgTexture.PFORMATSTR_RGBA32F

];