///////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) Microsoft Corporation.  All Rights Reserved.
//
//  File:       d3dxcore.h
//  Content:    D3DX core types and functions
//
///////////////////////////////////////////////////////////////////////////

#ifndef __D3DXCORE_H__
#define __D3DXCORE_H__

#include <d3d.h>
#include <limits.h>
#include "d3dxerr.h"


typedef struct ID3DXContext *LPD3DXCONTEXT;

// {9B74ED7A-BBEF-11d2-9F8E-0000F8080835}
DEFINE_GUID(IID_ID3DXContext, 
     0x9b74ed7a, 0xbbef, 0x11d2, 0x9f, 0x8e, 0x0, 0x0, 0xf8, 0x8, 0x8, 0x35);


///////////////////////////////////////////////////////////////////////////
// Defines and Enumerators used below:
///////////////////////////////////////////////////////////////////////////

//-------------------------------------------------------------------------
// D3DX_DEFAULT:
// ---------
// A predefined value that could be used for any parameter in D3DX APIs or 
// member functions that is an enumerant or a handle.  The D3DX 
// documentation indicates wherever D3DX_DEFAULT may be used, 
// and how it will be interpreted in each situation.
//-------------------------------------------------------------------------
#define D3DX_DEFAULT ULONG_MAX
                            
//-------------------------------------------------------------------------
// D3DX_DEFAULT_FLOAT:
// ------------------
// Similar to D3DX_DEFAULT, but used for floating point parameters.
// The D3DX documentation indicates wherever D3DX_DEFAULT_FLOAT may be used, 
// and how it will be interpreted in each situation.
//-------------------------------------------------------------------------
#define D3DX_DEFAULT_FLOAT FLT_MAX
                            
//-------------------------------------------------------------------------
// Hardware Acceleration Level:
// ---------------------------
// These constants represent pre-defined hardware acceleration levels,
// and may be used as a default anywhere a (DWORD) deviceIndex is required.
// Each pre-define indicates a different level of hardware acceleration.
// They are an alternative to using explicit deviceIndices retrieved by
// D3DXGetDeviceDescription().
//
// The only case these pre-defines should be used as device indices is if
// a particular level of acceleration is required, and given more than 
// one capable device on the computer, it does not matter which one
// is used.
//
// The method of selection is as follows: If one of the D3DX devices on 
// the primary DDraw device supports a requested hardware acceleration 
// level, it will be used. Otherwise, the first matching device discovered 
// by D3DX will be used.  
//
// Of course, it is possible for no match to exist for any of the
// pre-defines on a particular computer.  Passing such a value into the
// D3DX apis will simply cause them to fail, reporting that no match
// is available.
// 
// D3DX_HWLEVEL_NULL:      Null implementation (draws nothing)
// D3DX_HWLEVEL_REFERENCE: Reference implementation (slowest)
// D3DX_HWLEVEL_2D:        2D acceleration only (RGB rasterizer used)
// D3DX_HWLEVEL_RASTER:    Rasterization acceleration (likely most useful)
// D3DX_HWLEVEL_TL:        Transform and lighting acceleration 
// D3DX_DEFAULT:           The highest level of acceleration available
//                         on the primary DDraw device.
//-------------------------------------------------------------------------
#define D3DX_HWLEVEL_NULL       (D3DX_DEFAULT - 1)
#define D3DX_HWLEVEL_REFERENCE  (D3DX_DEFAULT - 2)
#define D3DX_HWLEVEL_2D         (D3DX_DEFAULT - 3) 
#define D3DX_HWLEVEL_RASTER     (D3DX_DEFAULT - 4) 
#define D3DX_HWLEVEL_TL         (D3DX_DEFAULT - 5) 

//-------------------------------------------------------------------------
// Surface Class:
// -------------
// These are the various types of 2D-surfaces classified according to their
// usage. Note that a number of them overlap. e.g. STENCILBUFFERS and 
// DEPTHBUFFERS overlap (since in DX7 implementation the stencil and depth
// bits are part of the same pixel format).
//
// Mapping to the DX7 DDPIXELFORMAT concepts:
// -----------------------------------------
// D3DX_SC_DEPTHBUFFER:    All ddpfs which have the DDPF_ZPIXELS or the
//                           DDPF_ZBUFFER flags set.
// D3DX_SC_STENCILBUFFER:  All ddpfs which have the DDPF_STENCILBUFFER 
//                          flag set.
// D3DX_SC_BUMPMAP:        All ddpfs which have the DDPF_BUMPLUMINANCE 
//                           or the DDPF_BUMPDUDV flags set.
// D3DX_SC_LUMINANCEMAP:   All ddpfs which have the DDPF_BUMPLUMINANCE
//                           or the DDPF_LUMINANCE flags set.
// D3DX_SC_COLORTEXTURE:   All the surfaces that have color information in
//                           them and can be used for texturing.
// D3DX_SC_COLORRENDERTGT: All the surfaces that contain color 
//                           information and can be used as render targets.
//-------------------------------------------------------------------------
#define D3DX_SC_DEPTHBUFFER     0x01
#define D3DX_SC_STENCILBUFFER   0x02
#define D3DX_SC_COLORTEXTURE    0x04
#define D3DX_SC_BUMPMAP         0x08
#define D3DX_SC_LUMINANCEMAP    0x10
#define D3DX_SC_COLORRENDERTGT  0x20

//-------------------------------------------------------------------------
// Surface Formats:
// ---------------
// These are the various types of surface formats that can be enumerated, 
// there is no DDPIXELFORMAT structure in D3DX, the enums carry the meaning 
// (like FOURCCs).
//
// All the surface classes are represented here.  
//
//-------------------------------------------------------------------------
typedef enum _D3DX_SURFACEFORMAT
{
    D3DX_SF_UNKNOWN    = 0,
    D3DX_SF_R8G8B8     = 1,
    D3DX_SF_A8R8G8B8   = 2,
    D3DX_SF_X8R8G8B8   = 3,
    D3DX_SF_R5G6B5     = 4,
    D3DX_SF_R5G5B5     = 5,
    D3DX_SF_PALETTE4   = 6,
    D3DX_SF_PALETTE8   = 7,
    D3DX_SF_A1R5G5B5   = 8,
    D3DX_SF_X4R4G4B4   = 9,
    D3DX_SF_A4R4G4B4   =10,
    D3DX_SF_L8         =11,      // 8 bit luminance-only
    D3DX_SF_A8L8       =12,      // 16 bit alpha-luminance
    D3DX_SF_U8V8       =13,      // 16 bit bump map format
    D3DX_SF_U5V5L6     =14,      // 16 bit bump map format with luminance
    D3DX_SF_U8V8L8     =15,      // 24 bit bump map format with luminance
    D3DX_SF_UYVY       =16,      // UYVY format (PC98 compliance)
    D3DX_SF_YUY2       =17,      // YUY2 format (PC98 compliance)
    D3DX_SF_DXT1       =18,      // S3 texture compression technique 1
    D3DX_SF_DXT3       =19,      // S3 texture compression technique 3
    D3DX_SF_DXT5       =20,      // S3 texture compression technique 5
    D3DX_SF_R3G3B2     =21,      // 8 bit RGB texture format
    D3DX_SF_A8         =22,      // 8 bit alpha-only
    D3DX_SF_TEXTUREMAX =23,      // Last texture format

    D3DX_SF_Z16S0      =256,
    D3DX_SF_Z32S0      =257,
    D3DX_SF_Z15S1      =258,
    D3DX_SF_Z24S8      =259,
    D3DX_SF_S1Z15      =260,
    D3DX_SF_S8Z24      =261,
    D3DX_SF_DEPTHMAX   =262,     // Last depth format

    D3DX_SF_FORCEMAX  = (DWORD)(-1)
} D3DX_SURFACEFORMAT;

//-------------------------------------------------------------------------
// Filtering types for Texture APIs 
//
// -------------
// These are the various filter types for generation of mip-maps 
//
// D3DX_FILTERTYPE
// -----------------------------------------
// D3DX_FT_POINT:   Point sampling only - no filtering
// D3DX_FT_LINEAR:  Bi-linear filtering
//
//-------------------------------------------------------------------------
typedef enum _D3DX_FILTERTYPE
{
    D3DX_FT_POINT    = 0x01,
    D3DX_FT_LINEAR   = 0x02,
    D3DX_FT_DEFAULT  = D3DX_DEFAULT
} D3DX_FILTERTYPE;

///////////////////////////////////////////////////////////////////////////
// Structures used below:
///////////////////////////////////////////////////////////////////////////

//-------------------------------------------------------------------------
// D3DX_VIDMODEDESC: Display mode description.
// ----------------
// width:       Screen Width 
// height:      Screen Height
// bpp:         Bits per pixel
// refreshRate: Refresh rate
//-------------------------------------------------------------------------
typedef struct  _D3DX_VIDMODEDESC
{
    DWORD width;
    DWORD height;
    DWORD bpp;
    DWORD refreshRate;
} D3DX_VIDMODEDESC;

//-------------------------------------------------------------------------
// D3DX_DEVICEDESC: Description of a device that can do 3D
// ---------------
// deviceIndex:   Unique (DWORD) number for the device.
// hwLevel:       Level of acceleration afforded.  This is one of the
//                predefined Device Indices, and exists in this
//                structure for informational purposes only.  More than
//                one device on the system may have the same hwLevel.
//                To refer to a particular device with the D3DX apis,
//                use the value in the deviceIndex member instead.
// ddGuid:        The ddraw GUID
// d3dDeviceGuid: Direct3D Device GUID
// ddDeviceID:    DDraw's GetDeviceIdentifier GUID.  This GUID is unique to
//                a particular driver revision on a particular video card.
// driverDesc:    String describing the driver
// monitor:       Handle to the video monitor used by this device (multimon
//                specific).  Devices that use different monitors on a 
//                multimon system report different values in this field.
//                Therefore, to test for a multimon system, an application 
//                should look for more than one different monitor handle in 
//                the list of D3DX devices.
// onPrimary:     Indicates if this device is on the primary monitor
//                (multimon specific).
//-------------------------------------------------------------------------
#define D3DX_DRIVERDESC_LENGTH    256

typedef struct _D3DX_DEVICEDESC
{
    DWORD       deviceIndex;  
    DWORD       hwLevel;
    GUID        ddGuid;       
    GUID        d3dDeviceGuid;   
    GUID        ddDeviceID;      
    char        driverDesc[D3DX_DRIVERDESC_LENGTH];          
    HMONITOR    monitor;
    BOOL        onPrimary;
} D3DX_DEVICEDESC;

///////////////////////////////////////////////////////////////////////////
// APIs:
///////////////////////////////////////////////////////////////////////////
#ifdef __cplusplus
extern "C" {
#endif //__cplusplus
    
//-------------------------------------------------------------------------
// D3DXInitialize: The very first call a D3DX app must make.
//-------------------------------------------------------------------------
HRESULT WINAPI
    D3DXInitialize();

//-------------------------------------------------------------------------
// D3DXUninitialize: The very last call a D3DX app must make.
//-------------------------------------------------------------------------
HRESULT WINAPI