PDFTextAlpha Property (ILEADRasterDlgFile)
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long PDFTextAlpha; | |
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Overview |
Refer to Using Imaging Common Dialogs |
Remarks
(Read Only) Get the type of font anti-aliasing entered by the user in the Open dialog box.
LEADTOOLS uses the PDFTextAlpha property when loading PDF, PS or EPS files. Possible values are:
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Value |
Meaning |
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1 |
Do not use font anti-aliasing. |
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2 |
Use 2-bit font anti-aliasing. |
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4 |
Use 4-bit font anti-aliasing. |
Aliasing is the effect on all pixel devices where diagonal and curved lines have a zigzag appearance. As pixels get larger, this effect becomes more noticeable. Anti-aliasing refers to methods designed to decrease or eliminate this effect. Shading the pixels along the borders of the affected lines does this.
Font anti-aliasing slows down the drawing of the resulting bitmap.
Font anti-aliasing can only be used if PDFDisplayDepth property is set to 8 or greater.
The PDFTextAlpha property is valid only if OptionsFileType property contains one of the PDF formats:
FILE_RAS_PDF,
FILE_RAS_PDF_G3_1D,
FILE_RAS_PDF_G3_2D,
FILE_RAS_PDF_G4,
FILE_RAS_PDF_JPEG,
FILE_RAS_PDF_JPEG_422,
FILE_RAS_PDF_JPEG_411.
See Also
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Elements |