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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;

/**
 * Native bindings to the ARB_texture_cube_map extension.
 * 
 * This extension provides a new texture generation scheme for cube map textures. Instead of the current texture providing a 1D, 2D, or 3D lookup into a
 * 1D, 2D, or 3D texture image, the texture is a set of six 2D images representing the faces of a cube. The (s,t,r) texture coordinates are treated as a
 * direction vector emanating from the center of a cube. At texture generation time, the interpolated per-fragment (s,t,r) selects one cube face 2D image
 * based on the largest magnitude coordinate (the major axis). A new 2D (s,t) is calculated by dividing the two other coordinates (the minor axes values)
 * by the major axis value.  Then the new (s,t) is used to lookup into the selected 2D texture image face of the cube map.
 * 
 * Unlike a standard 1D, 2D, or 3D texture that have just one target, a cube map texture has six targets, one for each of its six 2D texture image cube
 * faces. All these targets must be consistent, complete, and have equal width and height (ie, square dimensions).
 * 
 * This extension also provides two new texture coordinate generation modes for use in conjunction with cube map texturing.  The reflection map mode
 * generates texture coordinates (s,t,r) matching the vertex's eye-space reflection vector. The reflection map mode is useful for environment mapping
 * without the singularity inherent in sphere mapping. The normal map mode generates texture coordinates (s,t,r) matching the vertex's transformed
 * eye-space normal. The normal map mode is useful for sophisticated cube map texturing-based diffuse lighting models.
 * 
 * The intent of the new texgen functionality is that an application using cube map texturing can use the new texgen modes to automatically generate the
 * reflection or normal vectors used to look up into the cube map texture.
 * 
 * Promoted to core in {@link GL13 OpenGL 1.3}.
 */
public final class ARBTextureCubeMap {

    /** Accepted by the {@code param} parameters of TexGend, TexGenf, and TexGeni when {@code pname} parameter is TEXTURE_GEN_MODE. */
    public static final int
        GL_NORMAL_MAP_ARB     = 0x8511,
        GL_REFLECTION_MAP_ARB = 0x8512;

    /**
     * When the {@code pname} parameter of TexGendv, TexGenfv, and TexGeniv is TEXTURE_GEN_MODE, then the array {@code params} may also contain NORMAL_MAP_ARB
     * or REFLECTION_MAP_ARB. Accepted by the {@code cap} parameter of Enable, Disable, IsEnabled, and by the {@code pname} parameter of GetBooleanv,
     * GetIntegerv, GetFloatv, and GetDoublev, and by the {@code target} parameter of BindTexture, GetTexParameterfv, GetTexParameteriv, TexParameterf,
     * TexParameteri, TexParameterfv, and TexParameteriv.
     */
    public static final int GL_TEXTURE_CUBE_MAP_ARB = 0x8513;

    /** Accepted by the {@code pname} parameter of GetBooleanv, GetIntegerv, GetFloatv, and GetDoublev. */
    public static final int GL_TEXTURE_BINDING_CUBE_MAP_ARB = 0x8514;

    /**
     * Accepted by the {@code target} parameter of GetTexImage, GetTexLevelParameteriv, GetTexLevelParameterfv, TexImage2D, CopyTexImage2D, TexSubImage2D, and
     * CopySubTexImage2D.
     */
    public static final int
        GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB = 0x8515,
        GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB = 0x8516,
        GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB = 0x8517,
        GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB = 0x8518,
        GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB = 0x8519,
        GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB = 0x851A;

    /** Accepted by the {@code target} parameter of GetTexLevelParameteriv, GetTexLevelParameterfv, GetTexParameteriv, and TexImage2D. */
    public static final int GL_PROXY_TEXTURE_CUBE_MAP_ARB = 0x851B;

    /** Accepted by the {@code pname} parameter of GetBooleanv, GetDoublev, GetIntegerv, and GetFloatv. */
    public static final int GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB = 0x851C;

    private ARBTextureCubeMap() {}

}