DLI Implementation and Reference Guide - Datalogics

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A.24 DLI Reference Guide dlpdfcontentreferenceimage (DLPDFCONTENT *Content, DLPDFIMAGE *Image, ASFixed X, ASFixed Y, ASFixed Rotate, ASFixed ScaleX, ASFixed ScaleY) Return Value: void Concepts and Facilities: Guide to the DL Pager Composition System Description Parameters Return Value This procedure places a copy of the referenced image into the current content. • DLPDFCONTENT *Content: Represents the content element. These structures are destroyed when associated with a page or form, and pointers to them should not be used after that time. • DLPDFIMAGE *Image • ASFixed X: The X-axis location of the rotation point • ASFixed Y: The Y-axis location of the rotation point • ASFixed Rotate: Amount of counterclockwise rotation in degrees • ASFixed ScaleX: X-axis Scale Factor • ASFixed ScaleY: Y-axis Scale Factor void Exceptions Header Related Methods Availability dli.h dlpdfimagegetsize (New in DLI v2.2.5) All DLI-supported platforms.
DLI Reference Guide A.25 Technical Notes 1 The image will be placed so as to align its lower left hand corner with the given (X,Y) location, scaled as per ScaleX and ScaleY, and rotated as per Rotate. 2 Image rotation, if any, always occurs about its origin, typically the lower-left corner of the image, and the point of rotation is located by the given (X,Y) location. 3 The Scale Factors will determine the resulting size of the image. You need to know the original image resolution and its intended size in order to determine whether a Scale Factor on either axis is required. In DLI v2.2.5 or higher, the dlpdfimagegetsize method can retrieve image sizing data for you, and dividing the intended print size by the file size for each dimension (delivered by dlpdfimagegetsize) will yield a Scale Factor ratio which dlpdfcontentreferenceimage uses to calculate the final output image size. 4 The typical scaling calculation using values returned by dlpdfimagegetsize would be to divide the intended print size by the image size on each axis (e.g. "dlpdfcontentreferenceimage(Content, Image, Int32ToFixed(72), Int32ToFixed(92), 0, ASFixedDiv(xPoints,Int32ToFixed(xRasters)), ASFixedDiv(yPoints,Int32ToFixed(yRasters)));"). 5 An image in which each pixel of each raster line represents one PDF unit of output will return the same values for both image dimension (xRasters and yRasters) and print size (xPoints and yPoints), and thus a Scale Factor of 1 on both axes.
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Implementation and Reference Guide
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This guide is part of the Adobe® P
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