gdk-sharp0.0.0.0neutralGtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.In memory image handling and representation.
The Gdk.Pixbuf class is used to represent an image in
memory. The in-memory representation uses either a three
byte RGB representation or a four byte RGBA representation.
Pixbufs can be created from a number of sources: image files
in an assorted set of file formats (png, tiff, jpg, gif, xpm,
pcx, ico, xpm, xbm); Drawables (which can be windows on the X
server, or off-screen images in the X server) or in-memory
images.
A pixbuf can be rendered, scaled or composited into another
pixbuf, into a window on the X server, or on a drawable in the
X server. Various rendering methods are provided for this
purpose.
Pixbufs can also be saved to a number of different file
formats.
GLib.ObjectGLib.IWrapperSystem.IDisposableMethodGdk.Pixbuf
Creates a Pixbuf from a Pixdata
Source Gdk.Pixdata
Whether to make a private copy of the data
The return value is an initialized Pixbuf class
This creates a Pixbuf from a class that implements the
Gdk.Pixdata interface.
MethodGdk.PixbufAdds an alpha channel to the Pixbuf
Whether to set a color to zero
opacity. If this is , then the (r, g, b) arguments will be ignored.
Red value to substitute
Green value to substitute
Blue value to substitute
A new pixbuf with an alpha channel.
Takes an existing pixbuf and adds an alpha channel to
it. If the existing pixbuf already had an alpha channel,
the channel values are copied from the original;
otherwise, the alpha channel is initialized to 255 (full
opacity).
If is , then the color specified by (, , )
will be assigned zero opacity. That is, if you pass (255,
255, 255) for the substitute color, all white pixels will
become fully transparent.
The original image is not modified, a copy of the image is
made and returned.
MethodGdk.PixbufScaling with checkboard rendering
The width of destination image
The height of destination image
The interpolation type for the transformation.
Overall alpha for source image (0..255)
The size of checks in the checkboard (must be a power of two)
The color of check at upper left
The color of the other check
The new Pixbuf, or if not enough
memory could be allocated for it.
Creates a new Pixbuf by scaling to
x
and compositing the result with a checkboard
of colors and .
The colors must be in RGB format.
MethodGdk.PixbufScales a Pixbuf
The width of destination image
The height of destination image
The interpolation type for the transformation
A new Pixbuf object, or if no
memory is available for the transformation.
Create a new GdkPixbuf containing a copy of src scaled to
x . It leaves the current Pixbuf
unaffected. should be if you want maximum
speed (but when scaling down is usually unusably
ugly). The default should
be which offers
reasonable quality and speed.
You can scale a sub-portion of the Pixbuf by creating a
sub-pixbuf using a Pixbuf constructor.
For more complicated scale/compositions see and MethodSystem.VoidScale and Compose a Pixbuf with control over the checks
The destination Pixbuf to render to.
The left coordinate for region to render
The top coordinate for region to render
The width of the region to render
The height of the region to render
The offset in the X direction (currently rounded to an integer)
The offset in the Y direction (currently rounded to an integer)
The scale factor in the X direction
The scale factor in the Y direction
The interpolation type for the transformation.
Overall alpha for source image (0..255)
The X offset for the checkboard (origin of checkboard is at -check_x, -check_y)
The Y offset for the checkboard
The size of checks in the checkboard (must be a power of two)
The color of check at upper left
The color of the other check
Creates a transformation of the Pixbuf by scaling by
and
then translating by and
, then composites the rectangle
( ,,
, ) of the resulting image with a
checkboard of the colors and
and renders it onto the
destination image.
The and encode the color in 32-bit RGB format.
MethodGdk.PixbufGets an image from a Gdk.Image
Source Image (A )
A colormap (if src does not have one set) (A
Source X coordinate within drawable.
Source Y coordinate within drawable.
Destination X coordinate in pixbuf, or 0
if dest is .
Destination Y coordinate in pixbuf, or 0
if dest is .
Width in pixels of region to get.
Height in pixels of region to get.
The value of the Pixbuf (the same one that was passed) or
on error. See the remarks below
for details on the possible ways on which this function
might fail.
Transfers image data from a and
converts it to an RGB(A) representation inside a . In other words, copies image data
from the Image (which might be potentially shared using
shared memory between the client and the server) to a
client-side RGB(A) buffer (the Pixbuf). This allows you to
efficiently read individual pixels on the client side.
If the has no colormap ( returns ), then a suitable colormap must be
specified. Typically a or a
pixmap created by passing a to
the constructor will already
have a colormap associated with it. If the has a colormap, the argument will be ignored. If the is a bitmap (1 bit per pixel pixmap),
then a colormap is not required; pixels with a value of 1
are assumed to be white, and pixels with a value of 0 are
assumed to be black. For taking screenshots, the property returns the
correct colormap to use.
If the specified destination pixbuf is , then this
function will create an RGB Pixbuf with 8 bits per channel
and no alpha, with the same size specified by the width
and height arguments. In this case, the and arguments
must be specified as 0. If the specified destination
pixbuf is not and it contains alpha
information, then the filled pixels will be set to full
opacity (alpha = 255).
If the specified is a pixmap,
then the requested source rectangle must be completely
contained within the pixmap, otherwise the function will
return . For pixmaps only (not for
windows) passing -1 for or
is allowed, to mean the full
width or height of the pixmap.
If the specified is a window,
and the window is off the screen, then there is no image
data in the obscured/offscreen regions to be placed in the
pixbuf. The contents of portions of the corresponding to the offscreen
region are undefined.
If the window you are obtaining data from is partially
obscured by other windows, then the contents of the Pixbuf
areas corresponding to the obscured regions are undefined.
If the target image is not mapped (typically because
it's iconified/minimized or not on the current workspace),
then will be returned.
If memory can't be allocated for the return value, will be returned instead.
(In short, there are several ways this function can fail,
and if it fails it returns ; so
check the return value.)
MethodSystem.VoidRenders the image into a Drawable
Destination drawable.
GC used for rendering.
Source X coordinate within pixbuf.
Source Y coordinate within pixbuf.
Destination X coordinate within drawable.
Destination Y coordinate within drawable.
Width of region to render, in pixels, or -1 to use pixbuf width
Height of region to render, in pixels, or -1 to use pixbuf height
Dithering mode for GdkRGB.
X offset for dither.
Y offset for dither.
Renders a rectangular portion of the Pixbuf into the
while using the specified
. This is done using GdkRGB, so the
specified drawable must have the
visual and colormap. Note that this function will ignore
the opacity information for images with an alpha channel;
the GC must already have the clipping mask set if you want
transparent regions to show through.
For an explanation of dither offsets, see the GdkRGB
documentation. In brief, the dither offset is important
when re-rendering partial regions of an image to a
rendered version of the full image, or for when the
offsets to a base position change, as in scrolling. The
dither matrix has to be shifted for consistent visual
results. If you do not have any of these cases, the dither
offsets can be both zero.
MethodGdk.PixbufGets image from a Gdk.Drawable
Source drawable (A )
A colormap (if src does not have one set) (A
Source X coordinate within drawable.
Source Y coordinate within drawable.
Destination X coordinate in pixbuf, or 0
if dest is .
Destination Y coordinate in pixbuf, or 0
if dest is .
Width in pixels of region to get.
Height in pixels of region to get.
The value of the Pixbuf (the same one that was passed) or
on error. See the remarks below
for details on the possible ways on which this function
might fail.
Transfers image data from a
and converts it to an RGB(A) representation inside a . In other words, copies image data
from a server-side drawable to a client-side RGB(A)
buffer. This allows you to efficiently read individual
pixels on the client side.
If the has no colormap ( returns ), then a suitable colormap must be
specified. Typically a or a
pixmap created by passing a to
the constructor will already
have a colormap associated with it. If the has a colormap, the argument will be ignored. If the is a bitmap (1 bit per pixel pixmap),
then a colormap is not required; pixels with a value of 1
are assumed to be white, and pixels with a value of 0 are
assumed to be black. For taking screenshots, the property returns the
correct colormap to use.
If the specified destination pixbuf is , then this
function will create an RGB Pixbuf with 8 bits per channel
and no alpha, with the same size specified by the width
and height arguments. In this case, the and arguments
must be specified as 0. If the specified destination
pixbuf is not and it contains alpha
information, then the filled pixels will be set to full
opacity (alpha = 255).
If the specified is a pixmap,
then the requested source rectangle must be completely
contained within the pixmap, otherwise the function will
return . For pixmaps only (not for
windows) passing -1 for or
is allowed, to mean the full
width or height of the pixmap.
If the specified is a window,
and the window is off the screen, then there is no image
data in the obscured/offscreen regions to be placed in the
pixbuf. The contents of portions of the corresponding to the offscreen
region are undefined.
If the window you are obtaining data from is partially
obscured by other windows, then the contents of the Pixbuf
areas corresponding to the obscured regions are undefined.
If the target drawable is not mapped (typically because
it's iconified/minimized or not on the current workspace),
then will be returned.
If memory can't be allocated for the return value, will be returned instead.
(In short, there are several ways this function can fail,
and if it fails it returns ; so
check the return value.)
This function calls
internally and converts the resulting image to a , so the documentation for is also
relevant.
MethodGdk.PixbufCopies the Pixbuf
A copy of the data in the Pixbuf, or on failure
MethodobjectClones the Pixbuf
Implements the method.
MethodSystem.VoidTo be added
To be added: an object of type 'Gdk.Colormap'
To be added: an object of type 'Gdk.Pixmap'
To be added: an object of type 'Gdk.Bitmap'
To be added: an object of type 'int'
To be addedMethodSystem.VoidTo be added
To be added: an object of type 'Gdk.Bitmap'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be addedMethodSystem.VoidScale and Compose a Pixbuf
The destination Pixbuf to render to.
The left coordinate for region to render
The top coordinate for region to render
The width of the region to render
The height of the region to render
The offset in the X direction (currently rounded to an integer)
The offset in the Y direction (currently rounded to an integer)
The scale factor in the X direction
The scale factor in the Y direction
The interpolation type for the transformation.
Overall alpha for source image (0..255)
Creates a transformation of the Pixbuf by scaling by
and
then translating by and
, then composites the rectangle
(, ,
, ) of the resulting image onto the
destination image.
MethodSystem.VoidScale transformation.
The destination Pixbuf where the results
are rendered
The left coordinate for region to render
The top coordinate for region to render
The width of the region to render
The height of the region to render
The offset in the X direction (currently rounded to an integer)
The offset in the Y direction (currently rounded to an integer)
The scale factor in the X direction
The scale factor in the Y direction
The interpolation type for the transformation.
Creates a transformation of the Pixbuf by scaling to
and
then translating by and
, then renders the rectangle
(, ,
, ) of the resulting image onto the
destination image replacing the previous contents.
Try to use , this
function is the industrial-strength power tool you can
fall back to if is
not powerful enough.
MethodSystem.VoidCopies a region from one Pixbuf to another
Source X coordinate within src_pixbuf.
Source Y coordinate within src_pixbuf
Width of the area to copy.
Height of the area to copy.
Destination Pixbuf.
X coordinate within dest_pixbuf.
Y coordinate within dest_pixbuf.
Copies a rectangular area from src_pixbuf to
dest_pixbuf. Conversion of pixbuf formats is done
automatically.
MethodSystem.Void
Fills a pixbuf with a single color
RGBA value for the pixel to set (0xffffffff is opaque white, 0x00000000 transparent black)
Clears a pixbuf to the given RGBA value, converting the
RGBA value into the pixbuf's pixel format. The alpha will
be ignored if the Pixbuf does not have an alpha channel.
MethodSystem.StringLooks up an option in the Pixbuf
the key to lookup
The value associated with the
Looks up key in the list of options that may have been
attached to the pixbuf when it was loaded.
MethodSystem.VoidTo be added
To be added: an object of type 'Gdk.Pixmap'
To be added: an object of type 'Gdk.Bitmap'
To be added: an object of type 'int'
To be addedMethodSystem.VoidSaturation and pixelation of a Pixbuf
Target Pixbuf where the resulting image is stored
saturation factor
whether to pixelation will take place
Modifies saturation and optionally pixelates the Pixbuf,
placing the result in . may be the same Pixbuf with no ill
effects. If is 1.0 then
saturation is not changed. If it's less than 1.0,
saturation is reduced (the image is darkened); if greater
than 1.0, saturation is increased (the image is
brightened). If is , then pixels are faded in a checkerboard
pattern to create a pixelated image. src and dest must
have the same image format, size, and rowstride.
MethodSystem.VoidTo be added
To be added: an object of type 'Gdk.Drawable'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'Gdk.PixbufAlphaMode'
To be added: an object of type 'int'
To be added: an object of type 'Gdk.RgbDither'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be addedMethodSystem.VoidDisposes the resources associated with the object.ConstructorInternal constructor
Pointer to the C object.
An instance of Pixbuf, wrapping the C object.This is an internal constructor, and should not be used by user code.ConstructorConstructor
The colorspace ()
Whether the image should have transparency information.
Number of bits per color sample.
Width of image in pixels.
Height of image in pixels.
Creates a new structure and allocates a buffer
for it. The buffer has an optimal rowstride. Note that the
buffer is not cleared; you will have to fill it completely
yourself.
ConstructorCreates Pixbuf from image file.
Filename with the image
Creates a new pixbuf by loading an image from a file. The
file format is detected automatically (multiple formats are
supported: JPG, PNG, TIFF, XPM, XBM). If the file is not
found, a will be thrown.
ConstructorCreates a sub-Pixbuf from an existing one.
The containing .
X coord in src_pixbuf
Y coord in src_pixbuf
Width of region in src_pixbuf
Height of region in src_pixbuf
Creates a new pixbuf which represents a sub-region of
. The new pixbuf shares its
pixels with the original pixbuf, so writing to one affects
both. The new pixbuf holds a reference to , so will
not be finalized until the new pixbuf is finalized.
PropertySystem.Int32Number of bits per color sample in a pixbuf.The number of bits per color sample in the pixbufNone.PropertySystem.Int32Height of the imageThe height in pixels of the image
See also the , and for more information about
the layout of the image.
PropertySystem.BooleanReturns whether the Pixbuf contains an alpha channel if the image contains an Alpha
channel, otherwise.
The Pixbuf object handles images in either the RGB format,
or the RGBA format. The alpha channel value is a value
between 0 and 255 and controls the opacity of a given pixel.
PropertySystem.Int32The width of the imageThe width in pixels of the image
This is the width of the image in pixels. See the property as well.
PropertySystem.Int32The number of channels on a PixbufReturns the number of channels on a Pixbuf
The possible values are 3 (for RGB encoding) and 4 (for RGB
with an alpha transparency channel encoding.
PropertySystem.Int32Rowstride of the PixbufThe rowstride property for the Pixbuf
Queries the rowstride of a pixbuf. The rowstring is the
number of bytes occupied by a row of pixels. Sometimes
for alignment purposes, the rowstride might be bigger than
the actual width of the image. Applications that
manually process data from the image would scan lines by
adding the value of the Rowstride.
PropertyGdk.ColorspaceThe colorspace for this PixbufThe colorspace used by this Pixbuf
Currently Pixbuf only support the RGB colorspace.
MethodGdk.PixbufTo be added
To be added: an object of type 'Gdk.Drawable'
To be added: an object of type 'Gdk.Colormap'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'Gdk.Pixbuf'To be addedConstructorTo be added
To be added: an object of type 'byte []'
To be added: an object of type 'bool'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'int'
To be added: an object of type 'Gdk.PixbufDestroyNotify'
To be added: an object of type 'Gdk.Pixbuf'To be addedConstructorTo be added
To be added: an object of type 'byte []'
To be added: an object of type 'bool'
To be added: an object of type 'Gdk.Pixbuf'To be addedConstructorTo be added
To be added: an object of type 'int'
To be added: an object of type 'Void*'
To be added: an object of type 'bool'
To be added: an object of type 'Gdk.Pixbuf'To be addedMethodSystem.Int32To be addeda To be addedConstructorTo be added
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a a To be addedMethodGdk.PixbufTo be added
a a To be addedConstructorTo be added
a a To be addedConstructorTo be added
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a a To be addedPropertyGLib.GTypeTo be addeda To be addedConstructorInternal constructor
a a This is a constructor used by derivative types of that would have their own GLib.GType assigned to it. This is not typically used by C# code.PropertyGdk.PixbufFormat[]To be addeda To be addedPropertySystem.IntPtrTo be addeda To be addedMethodSystem.BooleanTo be added
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