PDFDraw

The Constant e_bgr.

The Constant e_bgra.

The Constant e_gray.

The Constant e_gray_alpha.

The Constant e_postprocess_invert.

The Constant e_postprocess_none.

The Constant e_rgb.

The Constant e_rgba.

PDFDraw constructor and destructor.

Instantiates a new PDFDraw with specified DPI(Dots per Inch).

Frees the native memory of the object. This can be explicity called to control the deallocation of native memory and avoid situations where the garbage collector does not free the object in a timely manner.

Frees the native memory of the object. This can be explicitly called to control the deallocation of native memory and avoid situations where the garbage collector does not free the object in a timely manner.

Draws the contents of the page to a given Graphics object.

A utility method to export the given PDF page to a PNG image file.

Export.

Export.

Get the bitmap for the given page.

Get the bitmap from given page

Get the rendered page with its pixels in an int array.

Gets the Separations from the page

Enable or disable anti-aliasing. Anti-Aliasing is a technique used to improve the visual quality of images when displaying them on low resolution devices (for example, low DPI computer monitors). Anti-aliasing is enabled by default.

Set the caching.

Enables or disables caching. Caching can improve the rendering performance in cases where the same page will be drawn multiple times.

clip the render region to the provided rect (in page space)

Set the color post processing transformation. This transform is applied to the rasterized bitmap as the final step in the rasterization process, and is applied directly to the resulting bitmap (disregarding any color space information). Color post processing only supported for RGBA output.

Set the output image resolution. DPI stands for Dots Per Inch. This parameter is used to specify the output image size and quality. A typical screen resolution for monitors these days is 92 DPI, but printers could use 200 DPI or more.

Note: The size of resulting image is a function of DPI and the dimensions of the source PDF page. For example, is DPI is 92 and page is 8 inches wide, the output bitmap will have 92*8 = 736 pixels per line. If you know the dimensions of the destination bitmap, but don't care about DPI of the image you can use pdfdraw.SetImageSize() instead.

Note: if you would like to rasterize extremely large bitmaps (e.g. with resolutions of 2000 DPI or more) it is not practical to use PDFDraw directly because of the memory required to store the entire image. In this case, you can use PDFRasterizer directly to generate the rasterized image in stripes or tiles.

Sets the default color of the page backdrop. By default, the page color is white.

Note: If the page backdrop is set to transparent, the page backdrop will be ignored.

Enable or disable annotation and forms rendering. By default, all annotations and form fields are rendered.

Set the error handling function to be called in case an error is encountered during page rendering.

Flips the vertical (i.e. Y) axis of the image.

Set the gamma factor used for anti-aliased rendering.

Note: Gamma correction is used only in the built-in rasterizer.

Enable or disable highlighting form fields. Default is disabled.

SetImageSize can be used instead of SetDPI() to adjust page scaling so that image fits into a buffer of given dimensions. If this function is used, DPI will be calculated dynamically for each page so that every page fits into the buffer of given dimensions.

Set the image size.

Set the image smoothing.

Enable image smoothing. The rasterizer allows a tradeoff between rendering quality and rendering speed. This function can be used to indicate the preference between rendering speed and quality.

Note: image smoothing option has effect only if the source image has higher resolution that the output resolution of the image on the rasterized page. PDFNet automatically controls at what resolution/zoom factor, 'image smoothing' needs to take effect.

Set the image smoothing.

Set the Optional Content Group (OCG) context that should be used when rendering the page. This function can be used to selectively render optional content (such as PDF layers) based on the states of optional content groups in the given context.

Enable or disable support for overprint. Overprint is a device dependent feature and the results will vary depending on the output color space and supported colorants (i.e. CMYK, CMYK+spot, RGB, etc). By default overprint is enabled.

Selects the page box/region to rasterize.

Set the page color to transparent. By default, PDFDraw assumes that the page is imposed directly on an opaque white surface. Some applications may need to impose the page on a different backdrop. In this case any pixels that are not covered during rendering will be transparent.

Note: If page transparency is enabled, the alpha channel will be preserved when the image is exported as PNG, TIFF, or RAW.

Enable or disable path hinting. Path hinting is used to slightly adjust paths in order to avoid or alleviate artifacts of hair line cracks between certain graphical elements. Path hinting is enabled by default.

Tells the rasterizer to render the page 'print' mode. Certain page elements (such as annotations or OCG-s) are meant to be visible either on the screen or on the printed paper but not both. A common example, is the "Submit" button on electronic forms. By default, print mode flag is set to false.

Set the core graphics library used for rasterization and rendering. Using this method it is possible to quickly switch between different implementations. By default, PDFDraw uses the built-in, platform independent rasterizer.

Set the rotation value for this page.

Note: This method is used only for drawing purposes and it does not modify the document (unlike Page::SetRotate()).

Set thin line adjustment parameters.