AspPDF for .NET - Object Reference: PdfImage

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PdfImage represents an image opened via PdfDocument's OpenImage method. Currently, AspPDF.NET supports BMP, GIF, JPEG, PNG and TIFF image formats. For more information on images, see Section 5.1 - PdfImage Object.

Properties Methods

BitsPerComponent
ColorSpace
ComponentsPerSample
Format
Height
IsMask
ResolutionX
ResolutionY
TransparencyColor
TransparencyColorExists
Width
ClearMask
SetColorMask
SetImageMask

Properties

int BitsPerComponent (Read-only)

Returns the number of bits per color component for this image. This number can be 1, 2, 4, or 8 depending on the image format. The property returns 8 for all GIF, JPEG, and 24-bit BMP images.

String ColorSpace (Read-only)

Returns the color space name for this image. Possible values are "DeviceGray" for grayscale images, "DeviceCMYK" for CMYK images, and "DeviceRGB" for RGB images.

int ComponentsPerSample (Read-only)

Returns the number of color components per sample (a rough equivalent of a pixel). This property is 1 for monochrome bitmaps, 3 for RGB images and 4 for CMYK images.

String Format (Read-only)

Returns the image format. Possible values are "GIF", "BMP", "JPG", "PNG" and "TIF" for GIF, BMP, JPEG, PNG and TIFF images, respectively.

float Height (Read-only)

Returns the image height in pixels.

bool IsMask (Read/Write)

Marks an image as a mask. For more information about using images as masks, see Section 5.2.1 - Explicit Masking.

float ResolutionX (Read-only)

Returns the resolution, in dots per inch (dpi), of the image along the X-axis. This property always returns 72 for GIF, PNG and BMP images.

float ResolutionY (Read-only)

Returns the resolution, in dots per inch (dpi), of the image along the Y-axis. This property always returns 72 for GIF, PNG and BMP images.

PdfParam TransparencyColor (Read-only)

If the underlying image is a transparent GIF, this property returns a PdfParam object filled with transparency color information. This property is currently obsolete.

bool TransparencyColorExists (Read-only)

Returns True if the underlying image is a transparent GIF, False otherwise. Should be used before the TransparencyColor property can be used to prevent an exception. This property is currently obsolete.

float Width (Read-only)

Returns the image width in pixels.

Methods

void ClearMask ( )
Clears a mask set by SetColorMask or SetImageMask methods.

void SetColorMask ( Object Param )
Sets a color key mask by specifying a range of colors to mask. Each color component of the range is specified by its min and max values. Min1, Max1, Min2, Max2, etc.
Param is a PdfParam object or parameter string specifying the color key masking parameters. These parameters are:
Min1, Max1,
Min2, Max2,
...
MinN, MaxN
where N is the number of color components per sample. Each Min and Max value must be an integer in the range 0 to 2^{BitsPerComponent} - 1.
For more information on color key masks, see Section 5.2.2 - Color Key Masking.

void SetImageMask ( PdfImage Image )
Sets an explicit image mask. Image must be a PdfImage object representing a monochrome bitmap which IsMap property is set to True. For more information about explicit image masks, see Section 5.2.1 - Explicit Masking.


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