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/*
 * Copyright LWJGL. All rights reserved.
 * License terms: https://www.lwjgl.org/license
 * MACHINE GENERATED FILE, DO NOT EDIT
 */
package org.lwjgl.opengl;

import java.nio.*;

import org.lwjgl.system.*;

import static org.lwjgl.system.Checks.*;
import static org.lwjgl.system.JNI.*;
import static org.lwjgl.system.MemoryStack.*;
import static org.lwjgl.system.MemoryUtil.*;

/**
 * Native bindings to the ARB_shader_atomic_counters extension.
 * 
 * This extension provides a set of atomic counters.
 * 
 * This extension provides GLSL built-in functions to query and increment/decrement these atomic counters.
 * 
 * This enables a shader to write to unique offsets (append to a buffer object) or read from unique offsets (consume from a buffer object).
 * 
 * Opaque handles to atomic counters are declared at global scope and are qualified with the uniform qualifier.
 * 
 * Unlike other user-defined uniforms declared at global scope, they take NO storage from the default partition, they have NO location, and they may NOT be
 * set with the Uniform* commands. Atomic counters may also NOT be grouped into uniform blocks.
 * 
 * Active atomic counters can be discovered by the commands {@link GL31#glGetUniformIndices GetUniformIndices}, {@link GL31#glGetActiveUniformName GetActiveUniformName}, {@link GL20#glGetActiveUniform GetActiveUniform} and
 * {@link GL31#glGetActiveUniformsiv GetActiveUniformsiv}.
 * 
 * Like samplers, the opaque handles of the atomic counters and are ONLY used in some GLSL built-in functions.
 * 
 * The atomic counters pointed to by the opaque handles are bound to buffer binding points and buffer offsets through the layout qualifiers in the shading
 * language, or they are implicitly assigned by the compiler.
 * 
 * Through the OpenGL API, buffer objects may be bound to these binding points with {@link GL30#glBindBufferBase BindBufferBase} or {@link GL30#glBindBufferRange BindBufferRange}.
 * 
 * The contents of the atomic counters are stored in the buffer objects. The contents of atomic counters may be set and queried with buffer object
 * manipulation functions (e.g. BufferData, BufferSubData, MapBuffer or MapBufferRange).
 * 
 * Requires {@link GL30 OpenGL 3.0}. Promoted to core in {@link GL42 OpenGL 4.2}.
 */
public class ARBShaderAtomicCounters {

    /** Accepted by the {@code target} parameter of BindBufferBase and BindBufferRange. */
    public static final int GL_ATOMIC_COUNTER_BUFFER = 0x92C0;

    /**
     * Accepted by the {@code pname} parameter of GetBooleani_v, GetIntegeri_v, GetFloati_v, GetDoublei_v, GetInteger64i_v, GetBooleanv, GetIntegerv,
     * GetInteger64v, GetFloatv, GetDoublev, and GetActiveAtomicCounterBufferiv.
     */
    public static final int GL_ATOMIC_COUNTER_BUFFER_BINDING = 0x92C1;

    /** Accepted by the {@code pname} parameter of GetIntegeri_64v. */
    public static final int
        GL_ATOMIC_COUNTER_BUFFER_START = 0x92C2,
        GL_ATOMIC_COUNTER_BUFFER_SIZE  = 0x92C3;

    /** Accepted by the {@code pname} parameter of GetActiveAtomicCounterBufferiv. */
    public static final int
        GL_ATOMIC_COUNTER_BUFFER_DATA_SIZE                            = 0x92C4,
        GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS               = 0x92C5,
        GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES        = 0x92C6,
        GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER          = 0x92C7,
        GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER    = 0x92C8,
        GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER = 0x92C9,
        GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER        = 0x92CA,
        GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER        = 0x92CB;

    /** Accepted by the {@code pname} parameter of GetBooleanv, GetIntegerv, GetInteger64v, GetFloatv, and GetDoublev. */
    public static final int
        GL_MAX_VERTEX_ATOMIC_COUNTER_BUFFERS          = 0x92CC,
        GL_MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS    = 0x92CD,
        GL_MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS = 0x92CE,
        GL_MAX_GEOMETRY_ATOMIC_COUNTER_BUFFERS        = 0x92CF,
        GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS        = 0x92D0,
        GL_MAX_COMBINED_ATOMIC_COUNTER_BUFFERS        = 0x92D1,
        GL_MAX_VERTEX_ATOMIC_COUNTERS                 = 0x92D2,
        GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS           = 0x92D3,
        GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS        = 0x92D4,
        GL_MAX_GEOMETRY_ATOMIC_COUNTERS               = 0x92D5,
        GL_MAX_FRAGMENT_ATOMIC_COUNTERS               = 0x92D6,
        GL_MAX_COMBINED_ATOMIC_COUNTERS               = 0x92D7,
        GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE             = 0x92D8,
        GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS         = 0x92DC;

    /** Accepted by the {@code pname} parameter of GetProgramiv. */
    public static final int GL_ACTIVE_ATOMIC_COUNTER_BUFFERS = 0x92D9;

    /** Accepted by the {@code pname} parameter of GetActiveUniformsiv. */
    public static final int GL_UNIFORM_ATOMIC_COUNTER_BUFFER_INDEX = 0x92DA;

    /** Returned in {@code params} by GetActiveUniform and GetActiveUniformsiv. */
    public static final int GL_UNSIGNED_INT_ATOMIC_COUNTER = 0x92DB;

    static { GL.initialize(); }

    protected ARBShaderAtomicCounters() {
        throw new UnsupportedOperationException();
    }

    static boolean isAvailable(GLCapabilities caps) {
        return checkFunctions(
            caps.glGetActiveAtomicCounterBufferiv
        );
    }

    // --- [ glGetActiveAtomicCounterBufferiv ] ---

    /** Unsafe version of: {@link #glGetActiveAtomicCounterBufferiv GetActiveAtomicCounterBufferiv} */
    public static native void nglGetActiveAtomicCounterBufferiv(int program, int bufferIndex, int pname, long params);

    /**
     * Obtains information about the set of active atomic counter buffers for a program.
     *
     * @param program     the name of a program object for which the command {@link GL20#glLinkProgram LinkProgram} has been issued in the past
     * @param bufferIndex the index of an active atomic counter buffer
     * @param pname       the parameter to query. One of:
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_DATA_SIZE ATOMIC_COUNTER_BUFFER_DATA_SIZE}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER}
     * @param params      a buffer in which to place the returned value
     */
    public static void glGetActiveAtomicCounterBufferiv(@NativeType("GLuint") int program, @NativeType("GLuint") int bufferIndex, @NativeType("GLenum") int pname, @NativeType("GLint *") IntBuffer params) {
        if (CHECKS) {
            check(params, 1);
        }
        nglGetActiveAtomicCounterBufferiv(program, bufferIndex, pname, memAddress(params));
    }

    /**
     * Obtains information about the set of active atomic counter buffers for a program.
     *
     * @param program     the name of a program object for which the command {@link GL20#glLinkProgram LinkProgram} has been issued in the past
     * @param bufferIndex the index of an active atomic counter buffer
     * @param pname       the parameter to query. One of:
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_DATA_SIZE ATOMIC_COUNTER_BUFFER_DATA_SIZE}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER}
{@link GL42#GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER}
     */
    @NativeType("void")
    public static int glGetActiveAtomicCounterBufferi(@NativeType("GLuint") int program, @NativeType("GLuint") int bufferIndex, @NativeType("GLenum") int pname) {
        MemoryStack stack = stackGet(); int stackPointer = stack.getPointer();
        try {
            IntBuffer params = stack.callocInt(1);
            nglGetActiveAtomicCounterBufferiv(program, bufferIndex, pname, memAddress(params));
            return params.get(0);
        } finally {
            stack.setPointer(stackPointer);
        }
    }

    /** Array version of: {@link #glGetActiveAtomicCounterBufferiv GetActiveAtomicCounterBufferiv} */
    public static void glGetActiveAtomicCounterBufferiv(@NativeType("GLuint") int program, @NativeType("GLuint") int bufferIndex, @NativeType("GLenum") int pname, @NativeType("GLint *") int[] params) {
        long __functionAddress = GL.getICD().glGetActiveAtomicCounterBufferiv;
        if (CHECKS) {
            check(__functionAddress);
            check(params, 1);
        }
        callPV(__functionAddress, program, bufferIndex, pname, params);
    }

}