IG_dspl_image_to

IG_dspl_image_to_device

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This function translates an array of pointers from image coordinates into device coordinates.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_dspl_image_to_device( [IN] HIGEAR hIGear, [IN] DWORD dwGrpID, [IN] HWND hWnd, [IN] HDC hDC, [IN/OUT] LPAT_POINT lpPoint, [IN] UINT nCount );

Arguments:

Name	Type	Description
hIGear	HIGEAR	ImageGear handle of image.
dwGrpID	DWORD	Identifier of group from which to get display options.
hWnd	HWND	Handle of a window where the image is drawn.
hDC	HDC	Handle of the device context used for drawing. Can be NULL, but if it is necessary to perform a calculation for the printer device context, then a real value should be provided.
lpPoint	LPAT_POINT	Pointer to an array of points that should be translated.
nCount	UINT	Number of elements in lpPoint array.

Return Value:

Returns the number of ImageGear errors that occurred during this function call.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.

Sample:

Image Processing

Example:

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HIGEAR hIGear; /* HIGEAR handle of image / DWORD nGrpID; / display group identifier / AT_POINT p[2]; / array of point to translate / AT_RECTANGLE ImageRect; / image rectangle / ... / calculates device coordinates of current image rectangle */ IG_dspl_layout_get( hIGear, nGrpID, &ImageRect, NULL, NULL, NULL, NULL, NULL, NULL ); p[0].x = ImageRect.x; p[0].y = ImageRect.y; p[1].x = ImageRect.x + ImageRect.width - 1; p[1].y = ImageRect.y + ImageRect.height - 1; IG_dspl_image_to_device( hIGear, nGrpID, hWnd, NULL, p, 2 ); ...

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HIGEAR            hIGear;         /* HIGEAR handle of image                                       */ 
DWORD           nGrpID;         /* display group identifier                                     */
AT_POINT                 p[2];          /* array of point to translate                                  */
AT_RECTANGLE            ImageRect;              /* image rectangle                                      */
 ...
/* calculates device coordinates of current image rectangle */   
IG_dspl_layout_get( hIGear, nGrpID, &ImageRect, NULL, NULL, NULL, NULL, NULL, NULL );
p[0].x = ImageRect.x;
p[0].y = ImageRect.y;
p[1].x = ImageRect.x + ImageRect.width - 1;
p[1].y = ImageRect.y + ImageRect.height - 1;
IG_dspl_image_to_device( hIGear, nGrpID, hWnd, NULL, p, 2 );
 ...

Remarks:

This function takes into account all display parameters including orientation and current scrolling position.

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