cables_dev/cables/src/core/cgl/cgl_framebuffer2.js

// * see framebuffer1


import { Logger } from "cables-shared-client";
import { Texture } from "./cgl_texture.js";


const Framebuffer2 = function (cgl, w, h, options)
{
    this._log = new Logger("cgl_framebuffer2");
    if (cgl.glVersion == 1) return this._log.error("framebuffer2 used on webgl1");
    this.Framebuffer2DrawTargetsDefault = null;
    this.Framebuffer2BlittingFramebuffer = null;
    this.Framebuffer2FinalFramebuffer = null;
    this._cgl = cgl;

    this._cgl.printError("before framebuffer2 constructor");

    this._width = 0;
    this._height = 0;
    this.valid = true;

    this._depthRenderbuffer = null;
    this._frameBuffer = null;
    this._textureFrameBuffer = null;
    this._colorRenderbuffers = [];
    this._drawTargetArray = [];
    this._disposed = false;

    if (!this.Framebuffer2BlittingFramebuffer) this.Framebuffer2BlittingFramebuffer = cgl.gl.createFramebuffer();
    if (!this.Framebuffer2FinalFramebuffer) this.Framebuffer2FinalFramebuffer = cgl.gl.createFramebuffer();

    if (!this.Framebuffer2DrawTargetsDefault) this.Framebuffer2DrawTargetsDefault = [cgl.gl.COLOR_ATTACHMENT0];

    this._options = options || {
        "isFloatingPointTexture": false,
    };

    // this._cgl.printError("fb2 before");

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

    this._cgl.profileData.addHeavyEvent("framebuffer create", this.name);

    if (!this._options.hasOwnProperty("numRenderBuffers")) this._options.numRenderBuffers = 1;
    if (!this._options.hasOwnProperty("depth")) this._options.depth = true;
    if (!this._options.hasOwnProperty("clear")) this._options.clear = true;
    if (!this._options.hasOwnProperty("multisampling"))
    {
        this._options.multisampling = false;
        this._options.multisamplingSamples = 0;
    }

    if (this._options.multisamplingSamples)
    {
        if (this._cgl.glSlowRenderer) this._options.multisamplingSamples = 0;
        if (!this._cgl.gl.MAX_SAMPLES) this._options.multisamplingSamples = 0;
        else this._options.multisamplingSamples = Math.min(this._cgl.maxSamples, this._options.multisamplingSamples);
    }

    if (!this._options.hasOwnProperty("filter")) this._options.filter = Texture.FILTER_LINEAR;
    if (!this._options.hasOwnProperty("wrap")) this._options.wrap = Texture.WRAP_REPEAT;

    this._numRenderBuffers = this._options.numRenderBuffers;
    this._colorTextures = [];

    this.clearColors = [];
    for (let i = 0; i < this._numRenderBuffers; i++) this.clearColors.push([0, 0, 0, 1]);


    if (!options.pixelFormat)
    {
        if (options.isFloatingPointTexture) this._options.pixelFormat = Texture.PFORMATSTR_RGBA32F;
        else this._options.pixelFormat = Texture.PFORMATSTR_RGBA8UB;
    }

    for (let i = 0; i < this._numRenderBuffers; i++)
    {
        this._colorTextures[i] = new Texture(cgl, {
            "name": "fb2 " + this.name + " " + i,
            "isFloatingPointTexture": this._options.isFloatingPointTexture,
            "anisotropic": this._options.anisotropic || 0,
            "pixelFormat": this._options.pixelFormat,
            "filter": this._options.filter,
            "wrap": this._options.wrap,
        });
    }



    let fil = Texture.FILTER_NEAREST;
    if (this._options.shadowMap) fil = Texture.FILTER_LINEAR;

    const defaultTexSize = 512;

    if (this._options.depth)
    {
        this._textureDepth = new Texture(cgl,
            {
                "name": "fb2 depth " + this.name,
                "isDepthTexture": true,
                "filter": fil,
                "shadowMap": this._options.shadowMap || false,
                "width": w || defaultTexSize,
                "height": h || defaultTexSize,
            });
    }

    if (cgl.aborted) return;

    this.setSize(w || defaultTexSize, h || defaultTexSize);

    this._cgl.printError("framebuffer2 constructor");
};

Framebuffer2.prototype.getWidth = function ()
{
    return this._width;
};
Framebuffer2.prototype.getHeight = function ()
{
    return this._height;
};

Framebuffer2.prototype.getGlFrameBuffer = function ()
{
    return this._frameBuffer;
};

Framebuffer2.prototype.getDepthRenderBuffer = function ()
{
    return this._depthRenderbuffer;
};

Framebuffer2.prototype.getTextureColor = function ()
{
    return this._colorTextures[0];
};

Framebuffer2.prototype.getTextureColorNum = function (i)
{
    return this._colorTextures[i];
};

Framebuffer2.prototype.getTextureDepth = function ()
{
    return this._textureDepth;
};

Framebuffer2.prototype.setFilter = function (f)
{
    for (let i = 0; i < this._numRenderBuffers; i++)
    {
        this._colorTextures[i].filter = f;
        this._colorTextures[i].setSize(this._width, this._height);
    }
};

Framebuffer2.prototype.delete = Framebuffer2.prototype.dispose = function ()
{
    this._disposed = true;
    let i = 0;
    for (i = 0; i < this._numRenderBuffers; i++) this._colorTextures[i].delete();
    // this._texture.delete();
    if (this._textureDepth) this._textureDepth.delete();
    for (i = 0; i < this._numRenderBuffers; i++) this._cgl.gl.deleteRenderbuffer(this._colorRenderbuffers[i]);
    this._cgl.gl.deleteRenderbuffer(this._depthRenderbuffer);
    this._cgl.gl.deleteFramebuffer(this._frameBuffer);
    this._cgl.gl.deleteFramebuffer(this._textureFrameBuffer);
};

Framebuffer2.prototype.setSize = function (w, h)
{
    if (this._disposed) return this._log.warn("disposed framebuffer setsize...");
    this._cgl.profileData.addHeavyEvent("framebuffer resize", this.name);

    let i = 0;

    this._width = this._cgl.checkTextureSize(w);
    this._height = this._cgl.checkTextureSize(h);

    this._cgl.profileData.profileFrameBuffercreate++;

    if (this._frameBuffer)
    {
        for (i = 0; i < this._numRenderBuffers; i++) this._cgl.gl.deleteRenderbuffer(this._colorRenderbuffers[i]);
        // this._cgl.gl.deleteRenderbuffer(this._colorRenderbuffer);
        this._cgl.gl.deleteRenderbuffer(this._depthRenderbuffer);
        this._cgl.gl.deleteFramebuffer(this._frameBuffer);
        this._cgl.gl.deleteFramebuffer(this._textureFrameBuffer);
    }

    this._frameBuffer = this._cgl.gl.createFramebuffer();
    this._textureFrameBuffer = this._cgl.gl.createFramebuffer();

    const depth = this._options.depth;

    for (i = 0; i < this._numRenderBuffers; i++)
    {
        this._colorTextures[i].setSize(this._width, this._height);
    }

    for (i = 0; i < this._numRenderBuffers; i++)
    {
        const renderBuffer = this._cgl.gl.createRenderbuffer();

        // color renderbuffer

        this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this._frameBuffer);
        this._cgl.gl.bindRenderbuffer(this._cgl.gl.RENDERBUFFER, renderBuffer);

        const info = Texture.setUpGlPixelFormat(this._cgl, this._options.pixelFormat);
        let internFormat = info.glInternalFormat;

        // if (this._options.isFloatingPointTexture)
        // {
        if (CGL.Texture.isPixelFormatHalfFloat(info.pixelFormat))
        {
            if (!this._cgl.enableExtension("OES_texture_float_linear"))
            {
                this._options.filter = Texture.FILTER_NEAREST;
                this.setFilter(this._options.filter);
            }
        }
        else if (CGL.Texture.isPixelFormatFloat(info.pixelFormat))
        {
            if (!this._cgl.enableExtension("OES_texture_float_linear"))
            {
                this._log.warn("no linear pixelformat,using nearest");
                this._options.filter = Texture.FILTER_NEAREST;
                this.setFilter(this._options.filter);
            }
        }
        // else if (info.pixelFormat == Texture.PFORMATSTR_RGBA32F || info.pixelFormat == Texture.PFORMATSTR_R11FG11FB10F
        // else if (info.pixelFormat == Texture.PFORMATSTR_RGBA32F || info.pixelFormat == Texture.PFORMATSTR_R11FG11FB10F
        // else if (info.pixelFormat == Texture.PFORMATSTR_RG16F)
        // {
        //     const extcb = this._cgl.enableExtension("EXT_color_buffer_float");

        //     if (!this._cgl.enableExtension("OES_texture_float_linear"))
        //     {
        //         console.log("no linear pixelformat,switching to nearest");
        //         this._options.filter = Texture.FILTER_NEAREST;
        //         this.setFilter(this._options.filter);
        //     }
        // }
        // }

        if (this._options.multisampling && this._options.multisamplingSamples)
        {
            this._cgl.gl.renderbufferStorageMultisample(this._cgl.gl.RENDERBUFFER, this._options.multisamplingSamples, internFormat, this._width, this._height);
        }
        else
        {
            this._cgl.gl.renderbufferStorage(this._cgl.gl.RENDERBUFFER, internFormat, this._width, this._height);
        }



        this._cgl.gl.framebufferRenderbuffer(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.COLOR_ATTACHMENT0 + i, this._cgl.gl.RENDERBUFFER, renderBuffer);
        this._colorRenderbuffers[i] = renderBuffer;
    }

    // this._cgl.gl.bindFramebuffer(this._cgl.gl.DRAW_FRAMEBUFFER, this._textureFrameBuffer);
    this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this._textureFrameBuffer);

    for (i = 0; i < this._numRenderBuffers; i++)
    {
        this._cgl.gl.framebufferTexture2D(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.COLOR_ATTACHMENT0 + i, this._cgl.gl.TEXTURE_2D, this._colorTextures[i].tex, 0);
    }

    if (this._options.depth)
    {
        this._cgl.gl.framebufferTexture2D(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.DEPTH_ATTACHMENT, this._cgl.gl.TEXTURE_2D, this._textureDepth.tex, 0);
    }

    // depth renderbuffer

    this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this._frameBuffer);


    let depthType = this._cgl.gl.DEPTH_COMPONENT32F;

    if (this._cgl.glSlowRenderer) depthType = this._cgl.gl.DEPTH_COMPONENT16;
    if (depth)
    {
        this._textureDepth.setSize(this._width, this._height);
        this._depthRenderbuffer = this._cgl.gl.createRenderbuffer();

        this._cgl.gl.bindRenderbuffer(this._cgl.gl.RENDERBUFFER, this._depthRenderbuffer);
        if (this._options.isFloatingPointTexture)
        {
            if (this._options.multisampling) this._cgl.gl.renderbufferStorageMultisample(this._cgl.gl.RENDERBUFFER, this._options.multisamplingSamples, depthType, this._width, this._height);
            else this._cgl.gl.renderbufferStorage(this._cgl.gl.RENDERBUFFER, depthType, this._width, this._height);
        }
        else if (this._options.multisampling)
        {
            this._cgl.gl.renderbufferStorageMultisample(this._cgl.gl.RENDERBUFFER, this._options.multisamplingSamples, depthType, this._width, this._height);
            // this._cgl.gl.renderbufferStorage(this._cgl.gl.RENDERBUFFER,depthType, this._width, this._height);
        }
        else
        {
            this._cgl.gl.renderbufferStorage(this._cgl.gl.RENDERBUFFER, depthType, this._width, this._height);
        }

        this._cgl.gl.framebufferRenderbuffer(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.DEPTH_ATTACHMENT, this._cgl.gl.RENDERBUFFER, this._depthRenderbuffer);
    }

    // this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, null);
    // this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this._textureFrameBuffer);

    this._drawTargetArray.length = 0;
    for (i = 0; i < this._numRenderBuffers; i++) this._drawTargetArray.push(this._cgl.gl.COLOR_ATTACHMENT0 + i);

    // this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, null);


    if (!this._cgl.gl.isFramebuffer(this._textureFrameBuffer)) this._log.warn("invalid framebuffer");// throw new Error("Invalid framebuffer");
    const status = this._cgl.gl.checkFramebufferStatus(this._cgl.gl.FRAMEBUFFER);

    if (status != this._cgl.gl.FRAMEBUFFER_COMPLETE)
    {
        this._log.error("framebuffer incomplete: " + this.name, this);
        this._log.log("options", this._options);
        this._log.log("options pixelformat", this._options.pixelFormat);

        switch (status)
        {
        case this._cgl.gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
            this._log.warn("FRAMEBUFFER_INCOMPLETE_ATTACHMENT...", this);
            throw new Error("Incomplete framebuffer: FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
        case this._cgl.gl.FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
            this._log.warn("FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT");
            throw new Error("Incomplete framebuffer: FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT");
        case this._cgl.gl.FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
            this._log.warn("FRAMEBUFFER_INCOMPLETE_DIMENSIONS");
            throw new Error("Incomplete framebuffer: FRAMEBUFFER_INCOMPLETE_DIMENSIONS");
        case this._cgl.gl.FRAMEBUFFER_UNSUPPORTED:
            this._log.warn("FRAMEBUFFER_UNSUPPORTED");
            throw new Error("Incomplete framebuffer: FRAMEBUFFER_UNSUPPORTED");
        default:
            this.valid = false;
            this._log.error("incomplete framebuffer", status, this._frameBuffer);
            this._cgl.printError();

            this._frameBuffer = null;
            // debugger;
            throw new Error("Incomplete framebuffer: " + status);

        // throw("Incomplete framebuffer: " + status);
        }
    }

    this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, null);
    this._cgl.gl.bindRenderbuffer(this._cgl.gl.RENDERBUFFER, null);

    // this._cgl.printError("fb setsize");
};

Framebuffer2.prototype.renderStart = function ()
{
    if (this._disposed) return this._log.warn("disposed framebuffer renderStart...");
    this._cgl.checkFrameStarted("fb2 renderstart");
    this._cgl.pushModelMatrix(); // needed ??

    this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this._frameBuffer);
    this._cgl.pushGlFrameBuffer(this._frameBuffer);
    this._cgl.pushFrameBuffer(this);

    this._cgl.pushPMatrix();
    this._cgl.pushViewPort(0, 0, this._width, this._height);

    this._cgl.gl.drawBuffers(this._drawTargetArray);

    if (this._options.clear)
    {
        this._cgl.gl.clearColor(0, 0, 0, 0);
        this._cgl.gl.clear(this._cgl.gl.COLOR_BUFFER_BIT | this._cgl.gl.DEPTH_BUFFER_BIT);
    }
};

Framebuffer2.prototype.clear = function ()
{
    if (this._numRenderBuffers <= 1)
    {
        this._cgl.gl.bindFramebuffer(this._cgl.gl.READ_FRAMEBUFFER, this._frameBuffer);
        this._cgl.gl.bindFramebuffer(this._cgl.gl.DRAW_FRAMEBUFFER, this._textureFrameBuffer);
    }
    else this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this._frameBuffer);

    this._cgl.gl.drawBuffers(this._drawTargetArray);

    for (let i = 0; i < this._numRenderBuffers; i++)
    {
        this._cgl.gl.framebufferTexture2D(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.COLOR_ATTACHMENT0 + i, this._cgl.gl.TEXTURE_2D, this._colorTextures[i].tex, 0);
        this._cgl.gl.clearBufferfv(this._cgl.gl.COLOR, i, this.clearColors[i]);
    }
    this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, null);
};

Framebuffer2.prototype.renderEnd = function ()
{
    if (this._disposed) return this._log.warn("disposed framebuffer renderEnd...");
    this._cgl.popPMatrix();

    this._cgl.profileData.profileFramebuffer++;


    if (this._numRenderBuffers <= 1)
    {
        this._cgl.gl.bindFramebuffer(this._cgl.gl.READ_FRAMEBUFFER, this._frameBuffer);
        this._cgl.gl.bindFramebuffer(this._cgl.gl.DRAW_FRAMEBUFFER, this._textureFrameBuffer);

        this._cgl.gl.clearBufferfv(this._cgl.gl.COLOR, 0, [0.0, 0.0, 0.0, 1.0]);
        this._cgl.gl.blitFramebuffer(0, 0, this._width, this._height, 0, 0, this._width, this._height, this._cgl.gl.COLOR_BUFFER_BIT | this._cgl.gl.DEPTH_BUFFER_BIT, this._cgl.gl.NEAREST);
    }
    else
    {
        this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this.Framebuffer2BlittingFramebuffer);
        this._cgl.gl.framebufferRenderbuffer(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.DEPTH_ATTACHMENT, this._cgl.gl.RENDERBUFFER, this._depthRenderbuffer);

        this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this.Framebuffer2FinalFramebuffer);
        this._cgl.gl.framebufferTexture2D(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.DEPTH_ATTACHMENT, this._cgl.gl.TEXTURE_2D, this._textureDepth.tex, 0);

        for (let i = 0; i < this._numRenderBuffers; i++)
        {
            this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this.Framebuffer2BlittingFramebuffer);
            this._cgl.gl.framebufferRenderbuffer(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.COLOR_ATTACHMENT0, this._cgl.gl.RENDERBUFFER, this._colorRenderbuffers[i]);


            this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this.Framebuffer2FinalFramebuffer);
            this._cgl.gl.framebufferTexture2D(this._cgl.gl.FRAMEBUFFER, this._cgl.gl.COLOR_ATTACHMENT0, this._cgl.gl.TEXTURE_2D, this._colorTextures[i].tex, 0);

            this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, null);

            this._cgl.gl.bindFramebuffer(this._cgl.gl.READ_FRAMEBUFFER, this.Framebuffer2BlittingFramebuffer);
            this._cgl.gl.bindFramebuffer(this._cgl.gl.DRAW_FRAMEBUFFER, this.Framebuffer2FinalFramebuffer);

            // this._cgl.gl.clearBufferfv(this._cgl.gl.COLOR, i, [0.0, 0.0, 0.0, 1.0]);



            let flags = this._cgl.gl.COLOR_BUFFER_BIT;
            if (i == 0) flags |= this._cgl.gl.DEPTH_BUFFER_BIT;

            this._cgl.gl.blitFramebuffer(0, 0, this._width, this._height, 0, 0, this._width, this._height, flags, this._cgl.gl.NEAREST);
        }
    }

    this._cgl.gl.bindFramebuffer(this._cgl.gl.FRAMEBUFFER, this._cgl.popGlFrameBuffer());
    this._cgl.popFrameBuffer();

    this._cgl.popModelMatrix();
    // this._cgl.resetViewPort();
    this._cgl.popViewPort();


    if (this._colorTextures[0].filter == Texture.FILTER_MIPMAP)
    {
        for (let i = 0; i < this._numRenderBuffers; i++)
        {
            this._cgl.gl.bindTexture(this._cgl.gl.TEXTURE_2D, this._colorTextures[i].tex);
            this._colorTextures[i].updateMipMap();
            this._cgl.gl.bindTexture(this._cgl.gl.TEXTURE_2D, null);
        }
    }
};

export { Framebuffer2 };

/// ///////