iflBMP(3) Image Format Library C++ Reference Manual iflBMP(3)
NAME
iflBMP - Windows bitmap format image file
HEADER FILE
#include <ifl/iflBMP.h>
DESCRIPTION
This Image Format Library provides support to read/write image files
stored in Windows Bitmap Image File (BMP) format.
The default extension for image files in the BMP format is '.bmp'. When
you create a file with that extension IFL will assume you want the BMP
format, unless you override it with the iflFormat parameter.
In addition to all the standard iflFile methods, this format supprts an
number of format specific operations via the getItem() and setItem()
methods. The tag values supported by these methods are enumerated in the
following sections.
TAG VALUES FOR GET ITEM
The following tag values are supported with getItem():
iflBMPHorizResolution
iflStatus getItem(iflBMPHorizResolution,
unsigned int* resolution)
This item gets the image's horizontal resolution in pixels per meter. It
is intended as a hint for applications that perform device independent
rendering.
iflBMPVertResolution
iflStatus getItem(iflBMPVertResolution,
unsigned int* resolution)
This item gets the image's vertical resolution in pixels per meter. It is
intended as a hint for applications that perform device independent
rendering.
iflBMPSignificantColors
iflStatus getItem(iflBMPSignificantColors,
unsigned int* colorCount)
Page 1
iflBMP(3) Image Format Library C++ Reference Manual iflBMP(3)
This item gets the number of significant colors in the image's colormap.
It is intended as a hint for applications that render the image to
devices with fewer colors than available in the colormap. It can be
assumed that the colors presented in the colormap (see getColormap()) are
ordered such that the significant colors appear at the lower addresses.
TAG VALUES FOR SET ITEM
The following tag values are supported with setItem():
iflBMPHorizResolution
iflStatus setItem(iflBMPHorizResolution,
unsigned int index)
This item gets the image's horizontal resolution in pixels per meter. It
is intended as a hint for applications that perform device independent
rendering. If not set, the format defaults this value to 75 pixels per
inch.
iflBMPVertResolution
iflStatus setItem(iflBMPVertResolution,
unsigned int interlaced)
This item sets the image's vertical resolution in pixels per meter. It is
intended as a hint for applications that perform device independent
rendering. If not set, the format defaults this value to 75 pixels per
inch.
iflBMPSignificantColors
iflStatus setItem(iflBMPSignificantColors,
unsigned int delayTime)
This item gets the number of significant colors in the image's colormap.
It is intended as a hint for applications that render the image to
devices with fewer colors than available in the colormap. For this to
function properly, the colormap (see setColormap()) must be sorted such
that the significant colors appear first.
SEE ALSO
iflFile, ilFileImg
Page 2