//////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) Microsoft Corporation.  All Rights Reserved.
//
//  File:       d3dx8tex.h
//  Content:    D3DX texturing APIs
//
//////////////////////////////////////////////////////////////////////////////

#include "d3dx8.h"

#ifndef __D3DX8TEX_H__
#define __D3DX8TEX_H__


//----------------------------------------------------------------------------
// D3DX_FILTER flags:
// ------------------
//
// A valid filter must contain one of these values:
//
//  D3DX_FILTER_NONE
//      No scaling or filtering will take place.  Pixels outside the bounds
//      of the source image are assumed to be transparent black.
//  D3DX_FILTER_POINT
//      Each destination pixel is computed by sampling the nearest pixel
//      from the source image.
//  D3DX_FILTER_LINEAR
//      Each destination pixel is computed by linearly interpolating between
//      the nearest pixels in the source image.  This filter works best 
//      when the scale on each axis is less than 2.
//  D3DX_FILTER_TRIANGLE
//      Every pixel in the source image contributes equally to the
//      destination image.  This is the slowest of all the filters.
//  D3DX_FILTER_BOX
//      Each pixel is computed by averaging a 2x2(x2) box pixels from 
//      the source image. Only works when the dimensions of the 
//      destination are half those of the source. (as with mip maps)
//
// And can be OR'd with any of these optional flags:
//
//  D3DX_FILTER_MIRROR_U
//      Indicates that pixels off the edge of the texture on the U-axis
//      should be mirrored, not wraped.
//  D3DX_FILTER_MIRROR_V
//      Indicates that pixels off the edge of the texture on the V-axis
//      should be mirrored, not wraped.
//  D3DX_FILTER_MIRROR_W
//      Indicates that pixels off the edge of the texture on the W-axis
//      should be mirrored, not wraped.
//  D3DX_FILTER_MIRROR
//      Same as specifying D3DX_FILTER_MIRROR_U | D3DX_FILTER_MIRROR_V |
//      D3DX_FILTER_MIRROR_V
//  D3DX_FILTER_DITHER
//      Dithers the resulting image.
//
//----------------------------------------------------------------------------

#define D3DX_FILTER_NONE            (1 << 0)
#define D3DX_FILTER_POINT           (2 << 0)
#define D3DX_FILTER_LINEAR          (3 << 0)
#define D3DX_FILTER_TRIANGLE        (4 << 0)
#define D3DX_FILTER_BOX             (5 << 0)

#define D3DX_FILTER_MIRROR_U        (1 << 16)
#define D3DX_FILTER_MIRROR_V        (2 << 16)
#define D3DX_FILTER_MIRROR_W        (4 << 16)
#define D3DX_FILTER_MIRROR          (7 << 16)
#define D3DX_FILTER_DITHER          (8 << 16)


//----------------------------------------------------------------------------
// D3DX_NORMALMAP flags:
// ---------------------
// These flags are used to control how D3DXComputeNormalMap generates normal
// maps.  Any number of these flags may be OR'd together in any combination.
//
//  D3DX_NORMALMAP_MIRROR_U
//      Indicates that pixels off the edge of the texture on the U-axis
//      should be mirrored, not wraped.
//  D3DX_NORMALMAP_MIRROR_V
//      Indicates that pixels off the edge of the texture on the V-axis
//      should be mirrored, not wraped.
//  D3DX_NORMALMAP_MIRROR
//      Same as specifying D3DX_NORMALMAP_MIRROR_U | D3DX_NORMALMAP_MIRROR_V
//  D3DX_NORMALMAP_INVERTSIGN
//      Inverts the direction of each normal 
//  D3DX_NORMALMAP_COMPUTE_OCCLUSION
//      Compute the per pixel Occlusion term and encodes it into the alpha.
//      An Alpha of 1 means that the pixel is not obscured in anyway, and
//      an alpha of 0 would mean that the pixel is completly obscured.
//
//----------------------------------------------------------------------------

//----------------------------------------------------------------------------

#define D3DX_NORMALMAP_MIRROR_U     (1 << 16)
#define D3DX_NORMALMAP_MIRROR_V     (2 << 16)
#define D3DX_NORMALMAP_MIRROR       (3 << 16)
#define D3DX_NORMALMAP_INVERTSIGN   (8 << 16)
#define D3DX_NORMALMAP_COMPUTE_OCCLUSION (16 << 16)




//----------------------------------------------------------------------------
// D3DX_CHANNEL flags:
// -------------------
// These flags are used by functions which operate on or more channels
// in a texture.
//
// D3DX_CHANNEL_RED
//     Indicates the red channel should be used
// D3DX_CHANNEL_BLUE
//     Indicates the blue channel should be used
// D3DX_CHANNEL_GREEN
//     Indicates the green channel should be used
// D3DX_CHANNEL_ALPHA
//     Indicates the alpha channel should be used
// D3DX_CHANNEL_LUMINANCE
//     Indicates the luminaces of the red green and blue channels should be 
//     used.
//
//----------------------------------------------------------------------------

#define D3DX_CHANNEL_RED            (1 << 0)
#define D3DX_CHANNEL_BLUE           (1 << 1)
#define D3DX_CHANNEL_GREEN          (1 << 2)
#define D3DX_CHANNEL_ALPHA          (1 << 3)
#define D3DX_CHANNEL_LUMINANCE      (1 << 4)




//----------------------------------------------------------------------------
// D3DXIMAGE_FILEFORMAT:
// ---------------------
// This enum is used to describe supported image file formats.
//
//----------------------------------------------------------------------------

typedef enum _D3DXIMAGE_FILEFORMAT
{
    D3DXIFF_BMP         = 0,
    D3DXIFF_JPG         = 1,
    D3DXIFF_TGA         = 2,
    D3DXIFF_PNG         = 3,
    D3DXIFF_DDS         = 4,
    D3DXIFF_PPM         = 5,
    D3DXIFF_DIB         = 6,
    D3DXIFF_FORCE_DWORD = 0x7fffffff

} D3DXIMAGE_FILEFORMAT;


//----------------------------------------------------------------------------
// LPD3DXFILL2D and LPD3DXFILL3D:
// ------------------------------
// Function types used by the texture fill functions.
//
// Parameters:
//  pOut
//      Pointer to a vector which the function uses to return its result.
//      X,Y,Z,W will be mapped to R,G,B,A respectivly. 
//  pTexCoord
//      Pointer to a vector containing the coordinates of the texel currently 
//      being evaluated.  Textures and VolumeTexture texcoord components 
//      range from 0 to 1. CubeTexture texcoord component range from -1 to 1.
//  pTexelSize
//      Pointer to a vector containing the dimensions of the current texel.
//  pData
//      Pointer to user data.
//
//----------------------------------------------------------------------------

typedef VOID (*LPD3DXFILL2D)(D3DXVECTOR4 *pOut, D3DXVECTOR2 *pTexCoord, D3DXVECTOR2 *pTexelSize, LPVOID pData);
typedef VOID (*LPD3DXFILL3D)(D3DXVECTOR4 *pOut, D3DXVECTOR3 *pTexCoord, D3DXVECTOR3 *pTexelSize, LPVOID pData);
 


//----------------------------------------------------------------------------
// D3DXIMAGE_INFO:
// ---------------
// This structure is used to return a rough description of what the
// the original contents of an image file looked like.
// 
//  Width
//      Width of original image in pixels
//  Height
//      Height of original image in pixels
//  Depth
//      Depth of original image in pixels
//  MipLevels
//      Number of mip levels in original image
//  Format
//      D3D format which most closely describes the data in original image
//  ResourceType
//      D3DRESOURCETYPE representing the type of texture stored in the file.
//      D3DRTYPE_TEXTURE, D3DRTYPE_VOLUMETEXTURE, or D3DRTYPE_CUBETEXTURE.
//  ImageFileFormat
//      D3DXIMAGE_FILEFORMAT representing the format of the image file.
//
//----------------------------------------------------------------------------

typedef struct _D3DXIMAGE_INFO
{
    UINT                    Width;
    UINT                    Height;
    UINT                    Depth;
    UINT                    MipLevels;
    D3DFORMAT               Format;
    D3DRESOURCETYPE         ResourceType;
    D3DXIMAGE_FILEFORMAT    ImageFileFormat;

} D3DXIMAGE_INFO;





#ifdef __cplusplus
extern "C" {
#endif //__cplusplus



//////////////////////////////////////////////////////////////////////////////
// Image File APIs ///////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
;
//----------------------------------------------------------------------------
// GetImageInfoFromFile/Resource:
// ------------------------------
// Fills in a D3DXIMAGE_INFO struct with information about an image file.
//
// Parameters:
//  pSrcFile
//      File name of the source image.
//  pSrcModule
//      Module where resource is located, or NULL for module associated
//      with image the os used to create the current process.
//  pSrcResource
//      Resource name
//  pSrcData
//      Pointer to file in memory.
//  SrcDataSize
//      Size in bytes of file in memory.
//  pSrcInfo
//      Pointer to a D3DXIMAGE_INFO structure to be filled in with the 
//      description of the data in the source image file.
//
//----------------------------------------------------------------------------

HRESULT WINAPI
    D3DXGetImageInfoFromFileA(
        LPCSTR                    pSrcFile,
        D3DXIMAGE_INFO*           pSrcInfo);

HRESULT WINAPI
    D3DXGetImageInfoFromFileW(
        LPCWSTR                   pSrcFile,
        D3DXIMAGE_INFO*           pSrcInfo);

#ifdef UNICODE
#define D3DXGetImageInfoFromFile D3DXGetImageInfoFromFileW
#else
#define D3DXGetImageInfoFromFile D3DXGetImageInfoFromFileA
#endif


HRESULT WINAPI
    D3DXGetImageInfoFromResourceA(
        HMODULE                   hSrcModule,
        LPCSTR                    pSrcResource,
        D3DXIMAGE_INFO*           pSrcInfo);

HRESULT WINAPI
    D3DXGetImageInfoFromResourceW(
        HMODULE                   hSrcModule,
        LPCWSTR                   pSrcResource,
        D3DXIMAGE_INFO*           pSrcInfo);

#ifdef UNICODE
#define D3DXGetImageInfoFromResource D3DXGetImageInfoFromResourceW
#else
#define D3DXGetImageInfoFromResource D3DXGetImageInfoFromResourceA
#endif


HRESULT WINAPI
    D3DXGetImageInfoFromFileInMemory(
        LPCVOID                   pSrcData,
        UINT                      SrcDataSize,
        D3DXIMAGE_INFO*           pSrcInfo);




//////////////////////////////////////////////////////////////////////////////
// Load/Save Surface APIs ////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

//----------------------------------------------------------------------------
// D3DXLoadSurfaceFromFile/Resource:
// ---------------------------------
// Load surface from a file or resource
//
// Parameters:
//  pDestSurface
//      Destination surface, which will receive the image.
//  pDestPalette
//      Destination palette of 256 colors, or NULL
//  pDestRect
//      Destination rectangle, or NULL for entire surface
//  pSrcFile
//      File name of the source image.
//  pSrcModule
//      Module where resource is located, or NULL for module associated
//      with image the os used to create the current process.
//  pSrcResource
//      Resource name
//  pSrcData
//      Pointer to file in memory.
//  SrcDataSize
//      Size in bytes of file in memory.
//  pSrcRect
//      Source rectangle, or NULL for entire image
//  Filter
//      D3DX_FILTER flags controlling how the image is filtered.
//      Or D3DX_DEFAULT for D3DX_FILTER_TRIANGLE.
//  ColorKey
//      Color to replace with transparent black, or 0 to disable colorkey.
//      This is always a 32-bit ARGB color, independent of the source image
//      format.  Alpha is significant, and should usually be set to FF for 
//      opaque colorkeys.  (ex. Opaque black == 0xff000000)
//  pSrcInfo
//      Pointer to a D3DXIMAGE_INFO structure to be filled in with the 
//      description of the data in the source image file, or NULL.
//
//----------------------------------------------------------------------------

HRESULT WINAPI
    D3DXLoadSurfaceFromFileA(
        LPDIRECT3DSURFACE8        pDestSurface,
        CONST PALETTEENTRY*       pDestPalette,
        CONST RECT*               pDestRect,
        LPCSTR                    pSrcFile,
        CONST RECT*               pSrcRect,
        DWORD                     Filter,
        D3DCOLOR                  ColorKey,
        D3DXIMAGE_INFO*           pSrcInfo);

HRESULT WINAPI
    D3DXLoadSurfaceFromFileW(
        LPDIRECT3DSURFACE8        pDestSurface,
        CONST PALETTEENTRY*       pDestPalette,
        CONST RECT*               pDestRect,
        LPCWSTR                   pSrcFile,
        CONST RECT*               pSrcRect,
        DWORD                     Filter,
        D3DCOLOR                  ColorKey,
        D3DXIMAGE_INFO*           pSrcInfo);

#ifdef UNICODE
#define D3DXLoadSurfaceFromFile D3DXLoadSurfaceFromFileW
#else
#define D3DXLoadSurfaceFromFile D3DXLoadSurfaceFromFileA
#endif



HRESULT WINAPI
    D3DXLoadSurfaceFromResourceA(
        LPDIRECT3DSURFACE8        pDestSurface,
        CONST PALETTEENTRY*       pDestPalette,
        CONST RECT*               pDestRect,
        HMODULE                   hSrcModule,
        LPCSTR                    pSrcResource,
        CONST RECT*               pSrcRect,
        DWORD                     Filter,
        D3DCOLOR                  ColorKey,
        D3DXIMAGE_INFO*           pSrcInfo);

HRESULT WINAPI
    D3DXLoadSurfaceFromResourceW(
        LPDIRECT3DSURFACE8        pDestSurface,
        CONST PALETTEENTRY*       pDestPalette,
        CONST RECT*               pDestRect,
        HMODULE                   hSrcModule,
        LPCWSTR                   pSrcResource,
        CONST RECT*               pSrcRect,
        DWORD                     Filter,
        D3DCOLOR                  ColorKey,
        D3DXIMAGE_INFO*           pSrcInfo);


#ifdef UNICODE
#define D3DXLoadSurfaceFromResource D3DXLoadSurfaceFromResourceW
#else