RE/RE_TextureTypes.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Mark Alexander
 *      Side Effects
 *      123 Front Street West, Suite 1401
 *      Toronto, Ontario
 *      Canada   M5J 2M2
 *      416-504-9876
 *
 * NAME:        RE_OGLTexture.h ( RE Library, C++)
 *
 * COMMENTS:
 *      Base class for various OpenGL texture types.
 */
#ifndef RE_OGLTextureType_h
#define RE_OGLTextureType_h

typedef unsigned int RE_TextureID;


enum RE_TextureDimension
{
    RE_TEXTURE_1D,
    RE_TEXTURE_2D,

    // These textures require extensions
    RE_TEXTURE_CUBE,                    // RE_TEXTURE_CUBE_MAP  
    RE_TEXTURE_RECTANGLE,               // RE_RECTURE_RECTANGLE
    RE_TEXTURE_3D,                      // RE_TEXTURE_3D
    RE_TEXTURE_1D_ARRAY,                // RE_TEXTURE_ARRAY
    RE_TEXTURE_2D_ARRAY                 // RE_TEXTURE_ARRAY + RE_TEXTURE_3D
};

    
enum RE_TexFiltType
{
    RE_FILT_MIN_FILTERS = -1,   // this isn't a real filter
    
    RE_FILT_NEAREST,
    RE_FILT_LINEAR,
    RE_FILT_NEAREST_MIPMAP_NEAREST,
    RE_FILT_NEAREST_MIPMAP_LINEAR,
    RE_FILT_LINEAR_MIPMAP_NEAREST,
    RE_FILT_LINEAR_MIPMAP_LINEAR,
    
    RE_FILT_MAX_FILTERS         // this isn't a real filter
};


enum RE_TextureCompress
{
    RE_COMPRESS_NONE,

    RE_COMPRESS_LOW_BIT_DEPTH,  // 8b for fixed, 16b FP for FP
    RE_COMPRESS_MIN_BIT_DEPTH,  // 4b for fixed, 9:9:9:5e FP for FP

    RE_COMPRESS_FP24,           // 24b FP, usually for Zdepth
    RE_COMPRESS_BIT,            // single bit per pixel

    RE_COMPRESS_GL_FAST,        // Let GL attempt to compress the image.
    RE_COMPRESS_GL_NICE,        // fast for streamed tex, nice for cached

    // Manual stuff.
    // 4:1 ratio, interpolated 16b color + 4b alpha
//     RE_COMPRESS_DXT_SHARP,   // sharp alpha changes - not implemented yet
//     RE_COMPRESS_DXT_GRADUAL  // gradual alpha changes - not implemented yet
};


// This controls how multitexturing and the GL base color interact. It acts on
// the previous color (for tex unit 0, that is the GL base color)
enum RE_TextureMode
{
    RE_TEXTURE_MODULATE,        // multiply (default)
    RE_TEXTURE_ADD,             // simple add
    RE_TEXTURE_DECAL,           // Over
    RE_TEXTURE_REPLACE,         // discard previous texture, partially probably
    
    // GL_BLEND and GL_COMBINE are currently not fully supported through RE.
    // You probably want to use GLSL rather than thesemore complicated modes.
    
    RE_TEXTURE_BLEND,           // Blend with previous color
    RE_TEXTURE_COMBINE,         // Combine of up to 3 RGB and 3 A textures.

    RE_TEXTURE_UNKNOWN
};

enum RE_TextureCubeFace
{
    RE_TEXTURE_CUBE_POS_X,
    RE_TEXTURE_CUBE_NEG_X,
    RE_TEXTURE_CUBE_POS_Y,
    RE_TEXTURE_CUBE_NEG_Y,
    RE_TEXTURE_CUBE_POS_Z,
    RE_TEXTURE_CUBE_NEG_Z,

    RE_TEXTURE_CUBE_ALL_FACES   // All faces at once, scans stacked vertically
};                              // in the order listed above
    

#endif

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