Method setupProgram

src/main/java/net/optifine/shaders/Shaders.java:2485–2600

(Program program, String vShaderPath, String gShaderPath, String fShaderPath)

    }

    private static void setupProgram(Program program, String vShaderPath, String gShaderPath, String fShaderPath)
    {
        checkGLError("pre setupProgram");
        int i = ARBShaderObjects.glCreateProgramObjectARB();
        checkGLError("create");

        if (i != 0)
        {
            progUseEntityAttrib = false;
            progUseMidTexCoordAttrib = false;
            progUseTangentAttrib = false;
            int j = createVertShader(program, vShaderPath);
            int k = createGeomShader(program, gShaderPath);
            int l = createFragShader(program, fShaderPath);
            checkGLError("create");

            if (j == 0 && k == 0 && l == 0)
            {
                ARBShaderObjects.glDeleteObjectARB(i);
                i = 0;
                program.resetId();
            }
            else
            {
                if (j != 0)
                {
                    ARBShaderObjects.glAttachObjectARB(i, j);
                    checkGLError("attach");
                }

                if (k != 0)
                {
                    ARBShaderObjects.glAttachObjectARB(i, k);
                    checkGLError("attach");

                    if (progArbGeometryShader4)
                    {
                        ARBGeometryShader4.glProgramParameteriARB(i, 36315, 4);
                        ARBGeometryShader4.glProgramParameteriARB(i, 36316, 5);
                        ARBGeometryShader4.glProgramParameteriARB(i, 36314, progMaxVerticesOut);
                        checkGLError("arbGeometryShader4");
                    }

                    hasGeometryShaders = true;
                }

                if (l != 0)
                {
                    ARBShaderObjects.glAttachObjectARB(i, l);
                    checkGLError("attach");
                }

                if (progUseEntityAttrib)
                {
                    ARBVertexShader.glBindAttribLocationARB(i, entityAttrib, (CharSequence)"mc_Entity");
                    checkGLError("mc_Entity");
                }