IG_dspl_zoom

IG_dspl_zoom_set

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This function sets the new zoom values.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_dspl_zoom_set( [IN] HIGEAR hIGear, [IN] DWORD dwGrpID, [IN] AT_MODE nZoomMode, [IN] DOUBLE dHZoom, [IN] DOUBLE dVZoom );

Arguments:

Name	Type	Description
hIGear	HIGEAR	Image handle to where set zoom options.
dwGrpID	DWORD	Identifier of group in which to set zoom options.
nZoomlMode	AT_MODE	New value of ZoomMode to set. Possible value is combination from one of the horizontal zoom flags: IG_DSPL_ZOOM_H_NOT_FIXED IG_DSPL_ZOOM_H_FIXED and one of the vertical flags: IG_DSPL_ZOOM_V_NOT_FIXED IG_DSPL_ZOOM_V_FIXED
dHZoom	DOUBLE	New value of ZoomValueH to set. Any positive number is accepted. Value 1.0 means that the image is zoomed by 100% or displayed in its actual size.
dVZoom	DOUBLE	New value of ZoomValueV to set. Any positive number is accepted. Value 1.0 means that the image is zoomed by 100% or displayed in its actual size.

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:

Display, MFC, FILTERS, ASCII, PAN, ART, Vector

Example:

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HIGEAR hIGear; /* HIGEAR handle of image / DWORD nGrpID; / display group identifier / ... / set aspect ratio as not fixed and zoom image by 150% and 200% for horizontal and vertical directions respectively / IG_dspl_layout_set( hIGear, nGrpID, IG_ASPECT_MODE, NULL, NULL, NULL, 0, 0, IG_DSPL_ASPECT_NOT_FIXED, 0.0 ); IG_dspl_zoom_set( hIGear, nGrpID, IG_DSPL_ZOOM_H_FIXED\| IG_DSPL_ZOOM_V_FIXED, 1.5, 2.0 ); ... / the same as before but only for horizontal direction; vertical direction is zoomed according to current fit method and device rectangle */ IG_dspl_zoom_set( hIGear, nGrpID, IG_DSPL_ZOOM_H_FIXED\| IG_DSPL_ZOOM_V_NOT_FIXED, 1.5, 2.0 ); ...

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HIGEAR            hIGear;        /* HIGEAR handle of image    */ 
DWORD           nGrpID;        /* display group identifier  */
 ...
/* set aspect ratio as not fixed and zoom image by 150% and 200% for horizontal and
vertical directions respectively  */
IG_dspl_layout_set( hIGear, nGrpID, IG_ASPECT_MODE, NULL, NULL, NULL, 0, 0,
IG_DSPL_ASPECT_NOT_FIXED, 0.0 ); 
IG_dspl_zoom_set( hIGear, nGrpID, IG_DSPL_ZOOM_H_FIXED| IG_DSPL_ZOOM_V_FIXED, 1.5, 2.0 );
 ...
/* the same as before but only for horizontal direction; vertical direction is zoomed
according to current fit method and device rectangle */
IG_dspl_zoom_set( hIGear, nGrpID, IG_DSPL_ZOOM_H_FIXED| IG_DSPL_ZOOM_V_NOT_FIXED, 1.5, 2.0
);
 ...

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