#5 No API for access getActiveAttrib/getActiveUniform

[Amorph]

No way to call getActiveAttrib and getActiveUniform
This functions may return WebGLActiveInfo object

https://www.khronos.org/registry/webgl/specs/latest/1.0/

WebGLActiveInfo? getActiveAttrib(WebGLProgram? program, GLuint index);
WebGLActiveInfo? getActiveUniform(WebGLProgram? program, GLuint index);

[Kamil Kolaczynski]

These functions are missing. I will add them in the next Synthclipse release (planned at the end of the month).

For now you can use the following workaround:

function getActiveAttrib(programID, index) {
    var activeAttributes = gl.getProgramParameter(programID, gl.ACTIVE_ATTRIBUTES);

    if (index < 0 || index >= activeAttributes) {
        out.println("ERROR: There is no active attribute with index " + index
                + ". Active attributes count: " + activeAttributes);
        return;
    }
    var maxLen = Arrays.newIntArray(1);
    gl.getProgramiv(programID, gl.ACTIVE_ATTRIBUTE_MAX_LENGTH, maxLen, 0);

    var written = Arrays.newIntArray(1);
    var size = Arrays.newIntArray(1);
    var type = Arrays.newIntArray(1);
    var nameBuf = Arrays.newByteArray(maxLen[0]);

    gl.getActiveAttrib(programID, index, maxLen[0], written, 0, size, 0, type, 0, nameBuf, 0);

    var name = new java.lang.String(nameBuf, 0, written[0]);
    return { name: name, size: size[0], type: type[0] };
}

function getActiveUniform(programID, index) {
    var activeUniforms = gl.getProgramParameter(programID, gl.ACTIVE_UNIFORMS);

    if (index < 0 || index >= activeUniforms) {
        out.println("ERROR: There is no active uniform with index " + index
                + ". Active uniforms count: " + activeUniforms);
        return;
    }
    var maxLen = Arrays.newIntArray(1);
    gl.getProgramiv(programID, gl.ACTIVE_UNIFORM_MAX_LENGTH, maxLen, 0);

    var written = Arrays.newIntArray(1);
    var size = Arrays.newIntArray(1);
    var type = Arrays.newIntArray(1);
    var nameBuf = Arrays.newByteArray(maxLen[0]);

    gl.getActiveUniform(programID, index, maxLen[0], written, 0, size, 0, type, 0, nameBuf, 0);

    var name = new java.lang.String(nameBuf, 0, written[0]);
    return { name: name, size: size[0], type: type[0] };
}

// tested on:
// JSX Examples\I. Low Level\1. WebGL - Triangle and Square\triangle-and-square.jsx
function test() {
    var activeAttributes = gl.getProgramParameter(shaderProgram.id, gl.ACTIVE_ATTRIBUTES);

    out.println("Active attributes: ")
    for (var i = 0; i < activeAttributes; i++) {
        var info = getActiveAttrib(shaderProgram.id, i);
        out.println((i + 1) + ") name: " + info.name + ", size: " + info.size + ", type: " + info.type);
    }

    var activeUniforms = gl.getProgramParameter(shaderProgram.id, gl.ACTIVE_ATTRIBUTES);

    out.println("\nActive unifomrs: ")
    for (var i = 0; i < activeUniforms; i++) {
        var info = getActiveUniform(shaderProgram.id, i);
        out.println((i + 1) + ") name: " + info.name + ", size: " + info.size + ", type: " + info.type);
    }
}

Also if you are using Synth API (not pure WebGL) these functions might be helpful:
GLSLProgram.printActiveAttributes()
GLSLProgram.printActiveUniforms()

(Check out "JSX Examples\II. Synth API\1. ProgramFactory\program-factory.jsx" for a use case)

[Amorph]

Thanks for the quick help)
I'm trying to write another WebGL framework in Synthclipse, so I think, I'll provide more bugs.

PS. I found one more bug, if comment buffer data commit, for example:

gl.bindBuffer(gl.ARRAY_BUFFER, squareVertexPositionBuffer.id);

Eclipse will crash

[Kamil Kolaczynski]

Thanks for another bug report. Unfortunately I don't know if I will be able to fix this error.