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A royalty-free, cross-platform API for full-function 2D and 3D graphics on embedded systems - including consoles, phones, appliances and vehicles.

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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.opengles;

import org.lwjgl.system.*;

import static org.lwjgl.system.Checks.*;

/**
 * Native bindings to the IMG_framebuffer_downsample extension.
 * 
 * This extension introduces the ability to attach color buffers to a framebuffer that are at a lower resolution than the framebuffer itself, with the GPU
 * automatically downsampling the color attachment to fit.
 * 
 * This can be useful for various post-process rendering techniques where it is desirable to generate downsampled images in an efficient manner, or for a
 * lower resolution post-process technique.
 * 
 * This extension exposes at least a 2 x 2 downscale. Other downsampling modes may be exposed on the system and this can be queried.
 */
public class IMGFramebufferDownsample {

    /** Returned by CheckFramebufferStatus. */
    public static final int GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_AND_DOWNSAMPLE_IMG = 0x913C;

    /** Accepted by the {@code pname} parameter of GetBooleanv, GetIntegerv, GetFloatv, GetInteger64v, and GetInternalFormativ. */
    public static final int GL_NUM_DOWNSAMPLE_SCALES_IMG = 0x913D;

    /** Accepted by the {@code target} parameter of GetIntegerv, GetInteger64v, GetIntegeri_v, GetInteger64i_v and GetInternalFormativ. */
    public static final int GL_DOWNSAMPLE_SCALES_IMG = 0x913E;

    /** Accepted by the {@code pname} parameter of GetFramebufferAttachmentParameteriv. */
    public static final int GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_SCALE_IMG = 0x913F;

    static { GLES.initialize(); }

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

    static boolean isAvailable(GLESCapabilities caps) {
        return checkFunctions(
            caps.glFramebufferTexture2DDownsampleIMG, caps.glFramebufferTextureLayerDownsampleIMG
        );
    }

    // --- [ glFramebufferTexture2DDownsampleIMG ] ---

    public static native void glFramebufferTexture2DDownsampleIMG(@NativeType("GLenum") int target, @NativeType("GLenum") int attachment, @NativeType("GLenum") int textarget, @NativeType("GLuint") int texture, @NativeType("GLint") int level, @NativeType("GLint") int xscale, @NativeType("GLint") int yscale);

    // --- [ glFramebufferTextureLayerDownsampleIMG ] ---

    public static native void glFramebufferTextureLayerDownsampleIMG(@NativeType("GLenum") int target, @NativeType("GLenum") int attachment, @NativeType("GLuint") int texture, @NativeType("GLint") int level, @NativeType("GLint") int layer, @NativeType("GLint") int xscale, @NativeType("GLint") int yscale);

}