magnification.h Magnification API Windows 8.1+

// -------------------------------------------------------------
// magnification.h
//
// Magnification Control API
//
// Copyright (c) Microsoft Corporation. All rights reserved.
// -------------------------------------------------------------


#ifndef _INC_MAGNIFIER
#define _INC_MAGNIFIER

#include <winapifamily.h>

#pragma region Desktop Family
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)

#ifndef __wincodec_h__
#include <wincodec.h>
#endif

#ifdef __cplusplus    // If used by C++ code,
extern "C" {          // we need to export the C interface
#endif

#ifdef _WIN32

// Magnifier Class Name
#define WC_MAGNIFIERA             "Magnifier"
#define WC_MAGNIFIERW             L"Magnifier"

#ifdef UNICODE
#define WC_MAGNIFIER              WC_MAGNIFIERW
#else
#define WC_MAGNIFIER              WC_MAGNIFIERA
#endif

#else
#define WC_MAGNIFIER              "Magnifier"
#endif

// Magnifier Window Styles
#define MS_SHOWMAGNIFIEDCURSOR      0x0001L
#define MS_CLIPAROUNDCURSOR         0x0002L
#define MS_INVERTCOLORS             0x0004L


// Filter Modes
#define MW_FILTERMODE_EXCLUDE   0
#define MW_FILTERMODE_INCLUDE   1

typedef struct tagMAGTRANSFORM
{
    float v[3][3];
} MAGTRANSFORM, *PMAGTRANSFORM;

typedef struct tagMAGIMAGEHEADER
{
    UINT width;
    UINT height;
    WICPixelFormatGUID format;
    UINT stride;
    UINT offset;
    SIZE_T cbSize;
} MAGIMAGEHEADER, *PMAGIMAGEHEADER;

typedef struct tagMAGCOLOREFFECT
{
    float transform[5][5];
} MAGCOLOREFFECT, *PMAGCOLOREFFECT;

typedef BOOL (CALLBACK* MagImageScalingCallback)(HWND hwnd, void * srcdata, MAGIMAGEHEADER srcheader, void * destdata, MAGIMAGEHEADER destheader, RECT unclipped, RECT clipped, HRGN dirty );

// Public Functions
BOOL WINAPI MagInitialize();
BOOL WINAPI MagUninitialize();

BOOL WINAPI MagSetWindowSource(HWND hwnd, RECT rect);
BOOL WINAPI MagGetWindowSource(HWND hwnd, RECT *pRect);
BOOL WINAPI MagSetWindowTransform(HWND hwnd, PMAGTRANSFORM pTransform);
BOOL WINAPI MagGetWindowTransform(HWND hwnd, PMAGTRANSFORM pTransform);
BOOL WINAPI MagSetWindowFilterList(HWND hwnd, DWORD dwFilterMode, int count, HWND *pHWND );
int  WINAPI MagGetWindowFilterList(HWND hwnd, DWORD *pdwFilterMode, int count, HWND *pHWND );
BOOL WINAPI MagSetImageScalingCallback(HWND hwnd, MagImageScalingCallback callback );
MagImageScalingCallback WINAPI MagGetImageScalingCallback(HWND hwnd );
BOOL WINAPI MagSetColorEffect(HWND hwnd, PMAGCOLOREFFECT pEffect);
BOOL WINAPI MagGetColorEffect(HWND hwnd, PMAGCOLOREFFECT pEffect);
BOOL WINAPI MagSetFullscreenTransform(_In_ float magLevel, _In_ int xOffset, _In_ int yOffset);
BOOL WINAPI MagGetFullscreenTransform(_Out_ float *pMagLevel, _Out_ int *pxOffset, _Out_ int *pyOffset);
BOOL WINAPI MagSetFullscreenColorEffect(_In_ PMAGCOLOREFFECT pEffect);
BOOL WINAPI MagGetFullscreenColorEffect(_Out_ PMAGCOLOREFFECT pEffect);
BOOL WINAPI MagSetInputTransform(_In_ BOOL fEnabled, _In_ const LPRECT pRectSource, _In_ const LPRECT pRectDest);
BOOL WINAPI MagGetInputTransform(_Out_ BOOL *pfEnabled, _Out_ LPRECT pRectSource, _Out_ LPRECT pRectDest);
BOOL WINAPI MagShowSystemCursor(_In_ BOOL fShowCursor);

#ifdef __cplusplus
}
#endif


#endif /* WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) */
#pragma endregion

#endif // !_INC_MAGNIFIER