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NAME ^

Win32::GUI::DIBitmap - add new reading/writing image formats to Win32::GUI and some image manipulation.

SYNOPSIS ^

  use Win32::GUI();
  use Win32::GUI::DIBitmap;

  $W = new Win32::GUI::Window (
              -title    => "Win32::GUI::DIBitmap test",
              -pos      => [100, 100],
              -size     => [400, 400],
              -name     => "Window",
              );

  $dib = newFromFile Win32::GUI::DIBitmap ('image.jpg');
  $hbitmap = $dib->ConvertToBitmap();
  undef $dib;

  $W->AddButton (
    -pos     => [100, 100],
    -size    => [200, 200],
    -bitmap  => $hbitmap,
    -name    => "Button",
    -visible => 1,
    );

  $W->Show();
  Win32::GUI::Dialog();
  sub Window_Terminate { -1 }

DESCRIPTION ^

Win32::GUI::DIBitmap adds new reading/writing image formats to Win32::GUI and some image manipulation.

This package use FreeImage 3.8.0, an open source image library supporting all common image formats http://freeimage.sourceforge.net/.

Supports many formats, such as:

   Format  Reading Writing Description
   BMP     Y       Y       Windows or OS/2 Bitmap [Export = 1 4 8 16 24 32]
   ICO     Y       Y       Windows Icon [Export = 1 4 8 16 24 32]
   JPEG    Y       Y       JPEG - JFIF Compliant [Export = 8 24]
   JNG     Y       N       JPEG Network Graphics
   KOALA   Y       N       C64 Koala Graphics
   IFF     Y       N       IFF Interleaved Bitmap
   MNG     Y       N       Multiple Network Graphics
   PBM     Y       Y       Portable Bitmap (ASCII) [Export = 1 8 24]
   PBMRAW  Y       Y       Portable Bitmap (RAW) [Export = 1 8 24]
   PCD     Y       N       Kodak PhotoCD
   PCX     Y       N       Zsoft Paintbrush
   PGM     Y       Y       Portable Greymap (ASCII) [Export = 1 8 24]
   PGMRAW  Y       Y       Portable Greymap (RAW) [Export = 1 8 24]
   PNG     Y       Y       Portable Network Graphics [Export = 1 4 8 24 32]
   PPM     Y       Y       Portable Pixelmap (ASCII) [Export = 1 8 24]
   PPMRAW  Y       Y       Portable Pixelmap (RAW) [Export = 1 8 24]
   RAS     Y       N       Sun Raster Image
   TARGA   Y       Y       Truevision Targa [Export = 8 16 24 32]
   TIFF    Y       Y       Tagged Image File Format [Export = 1 4 8 24 32]
   WBMP    Y       Y       Wireless Bitmap [Export = 1]
   PSD     Y       N       Adobe Photoshop
   CUT     Y       N       Dr. Halo
   XBM     Y       N       X11 Bitmap Format
   XPM     Y       Y       X11 Pixmap Format [Export = 8 24]
   DDS     Y       N       DirectX Surface
   GIF     Y       Y       Graphics Interchange Format [Export = 8]

FreeImage can handle multi-page file (TIFF and ICO support only).

PACKAGE FUNCTIONS ^

FreeImage Library Info functions

GetVersion ()

Return the FreeImage version string.

GetCopyright ()

Return the FreeImage copyright string.

FIF functions

Constant

FIF = Format Identifier File.

  FIF_UNKNOWN = -1
  FIF_BMP     FIF_ICO    FIF_JPEG   FIF_JNG
  FIF_KOALA   FIF_LBM    FIF_MNG    FIF_PBM
  FIF_PBMRAW  FIF_PCD    FIF_PCX    FIF_PGM
  FIF_PGMRAW  FIF_PNG    FIF_PPM    FIF_PPMRAW
  FIF_RAS     FIF_TARGA  FIF_TIFF   FIF_WBMP
  FIF_PSD     FIF_IFF    FIF_LBM    FIF_CUT
  FIF_XBM     FIF_XPM    FIF_DDS    FIF_GIF
GetFIFCount ()

Return the max FIF value.

GetFormatFromFIF (fif)

Return the string format from FIF value.

GetFIFFromFormat (format)

Return FIF value from the string format.

GetFIFFromMime (mime)

Return FIF value from the Mime string.

GetFIFFromFilename (filename)

Return FIF value from the filename string.

GetFIFFromFile (filename)

Return FIF value from file data.

GetFIFFromData (data)

Return FIF value from memory data.

FIF info functions

FIFExtensionList (fif)

Return a coma separated string of extension filenname.

FIFDescription (fif)

Return a description string of the format.

FIFRegExpr (fif)

Return a regexp string for identify format.

FIFMimeType (fif)

Return a mime-type string of the format.

FIFSupportsReading (fif)

This format can be read ?

FIFSupportsWriting (fif)

This format can be write ?

FIFSupportsExportBPP (fif, bpp)

This format can be write bpp image ?

FIFSupportsExportType (fif, type)

This format can export as image format type ?

FIFSupportsICCProfiles (fif)

This format support ICC profile ?

Colors functions

LookupX11Color (string_color)

Return Color of string color or undef if error. This color value can be an integer value or a [B,G,R,A] array.

LookupSVGColor (string_color)

Return Color of string color or undef if error. This color value can be an integer value or a [B,G,R,A] array.

DIBITMAP OBJECT ^

DIBitmap New methods

new ([width=100, height=100, bpp=24, redmask=0, bluemask=0, greemask=0, type=FIT_BITMAP])

Allocate a Win32::GUI::DIBitmap object.

Image storage types availlable.

  FIT_UNKNOWN = 0 : unknown type
  FIT_BITMAP  = 1 : standard image           : 1-, 4-, 8-, 16-, 24-, 32-bit
  FIT_UINT16  = 2 : array of unsigned short  : unsigned 16-bit
  FIT_INT16   = 3 : array of short           : signed 16-bit
  FIT_UINT32  = 4 : array of unsigned long   : unsigned 32-bit
  FIT_INT32   = 5 : array of long            : signed 32-bit
  FIT_FLOAT   = 6 : array of float           : 32-bit IEEE floating point
  FIT_DOUBLE  = 7 : array of double          : 64-bit IEEE floating point
  FIT_COMPLEX = 8 : array of FICOMPLEX       : 2 x 64-bit IEEE floating point
newFromFile (filename, [flag])

Create a Win32::GUI::DIBBitmap from a image file.

Some format have special load flag :

  Type   | Flag              | Description
  -------+-------------------+----------------------------------------
  ICO    | ICO_MAKEALPHA     | Convert to 32bpp and create an alpha
         |                   | channel from the AND-mask when loading
  JPEG   | JPEG_FAST         | Load file fast (sacrifing quality)
         | JPEG_ACCURATE     | Load file with best quality (sacrifing speed)
  PCD    | PCD_BASE          | Load picture sized 768 * 512.
  PCD    | PCD_BASEDIV4      | Load picture sized 384 * 256.
  PCD    | PCD_BASEDIV16     | Load picture sized 192 * 128.
  PNG    | PNG_IGNOREGAMMA   | Avoid gamma correction
  TARGA  | TARGA_LOAD_RGB888 | Convert RGB555 and ARGB8888 to RGB888
  TIFF   | TIFF_CMYK         | Load CMYK bitmap as 32 bit separated CMYK.
newFromData (data, [flag])

Create a Win32::GUI::DIBitmap from memory data.

newFromBitmap (hbitmap)

Create a Win32::GUI::DIBitmap from a Win32::GUI::Bitmap.

newFromDC (hdc, [x, y, w, h] )

Create a Win32::GUI::DIBitmap from a Win32::GUI::DC.

You can capture only a portion of the HDC with x,y,w,h option.

newFromWindow (hwnd, [flag = 0])

Create a Win32::GUI::DIBitmap from a Win32::GUI::Window.

  flag = 0 : All the window is capture (with border)
  flag = 1 : Only the Client window is capture

DIBitmap Save methods

SaveToFile (filename, [fif, flag])

Save a Win32::GUI::DIBitmap in a file.

Some format have special save format :

  Type  | Flag                | Description
  ------+---------------------+---------------------------------------
  BMP   | BMP_SAVE_RLE        | Compress bitmap using RLE
  JPEG  | JPEG_DEFAULT        | Save with good quality (75:1)
        | JPEG_QUALITYSUPERB  | Save with superb quality (100:1)
        | JPEG_QUALITYGOOD    | Save with good quality (75:1)
        | JPEG_QUALITYNORMAL  | Save with normal quality (50:1)
        | JPEG_QUALITYAVERAGE | Save with average quality (25:1)
        | JPEG_QUALITYBAD     | Save with bad quality (10:1)
  PxM   | PNM_DEFAULT         | Save bitmap as a binary file
        | PNM_SAVE_RAW        | Save bitmap as a binary file
        | PNM_SAVE_ASCII      | Save bitmap as a ascii file
  TIFF  | TIFF_DEFAULT        | Save using CCITFAX4 compression for
        |                     | 1bit and PACKBITS for other
        | TIFF_CMYK           | Store tags for separated CMYK
        |                     | (combine with compresion flag)
        | TIFF_PACKBITS       | Save using PACKBITS compression
        | TIFF_DEFLATE        | Save using DEFLATE compression
        | TIFF_ADOBE_DEFLATE  | Save using Adobe DEFLATE compression
        | TIFF_NONE           | Save without compression
        | TIFF_CCITTFAX3      | Save using CCITT Group 3 fax encoding
        | TIFF_CCITTFAX4      | Save using CCITT Group 4 fax encoding
        | TIFF_LZW            | Save using LZW compression

  A tempory convertion is done for 16-32bit JPEG and 16bit PNG before saving.
SaveToData (fif, [flag])
  Save a Win32::GUI::DIBitmap in memory.

DIBitmap information methods

GetWidth () or Width

Return the Width of the image.

GetHeight () or Height

Return the Height of the image.

GetColorsUsed ()

Return the number of color use in the image.

GetBPP ()

Return the bit per pixel use in the image.

GetRedMask ()

Return a bit pattern describing the red color copmponent of a pixel.

GetGreenMask ()

Return a bit pattern describing the green color copmponent of a pixel.

GetBlueMask ()

Return a bit pattern describing the blue color copmponent of a pixel.

GetColorType ()

Return the color type of the image.

Values : FIC_MINISWHITE = 0 : Monochrome bitmap, with first palette entry is white FIC_MINISBLACK = 1 : Monochrome bitmap, with first palette entry is black Palletised bitmap, with greyscale palette FIC_RGB = 2 : RGB color model FIC_PALETTE = 3 : Color map indexed FIC_RGBALPHA = 4 : RGB color model with alpha channel FIC_CMYK = 5 : CMYK color model

GetLine ()

Return width of data image in bytes.

GetPitch ()

Return pitch of data image. Pitch it's the width of the bitmap in bytes, rounded to the next 32 bit boundary.

GetDotsPerMeterX ()

Return dots per meter on X.

GetDotsPerMeterY ()

Return dots per meter on Y.

GetInfoHeader ()

Return a windows BITMAPINFOHEADER struct.

GetInfo ()

Return a window BITMAPINFO struct.

GetSize ()

Return memory size of data for the image

GetBits ()

Return data of the image

IsTransparent ()

Image is transparent.

GetImageType ()

Return image type.

DIBitmap and GD

newFromGD (gd, newGD=0)

Create a Win32::GUI::DIBitmap from a GD image New object have same size and format, gd image copy into.

Flag newGD is for new GD version (> 2.0) with trueColor bitmap. Default value force 8 bit bitmap.

CopyFromGD (gd, newGD=0)

Copy GD image into Win32::GUI::DIBitmap. GD and Win32::GUI::DIBitmap must have same size and format.

CopyToGD (gd, newGD=0)

Copy Win32::GUI::DIBitmap into GD image. GD and Win32::GUI::DIBitmap must have same size and format.

DIBitmap Pixels and Background methods

GetPixel (x, y)

Return pixel value color at x, y or undef if error. For image with BPP <= 8 return palette index color. For image with BPP > 8 return color value. This color value can be an integer value or a [B,G,R,A] array.

SetPixel (x, y, color | Blue, Green, Red, [Alpha])

Set pixel value color at x, y. Return boolean value. For image with BPP <= 8, it's palette color index. For image with BPP > 8, arguments can an integer color value or B,G,R,[A] values.

HasBackgroundColor ()

Indicate if image have Background Color.

GetBackgroundColor ()

Return Background Color or undef if error. This color value can be an integer value or a [B,G,R,A] array.

SetBackgroundColor (color | Blue, Green, Red, [Alpha])

Set Background Color. Return boolean value.

DIBitmap Convertion methods

ConvertToBitmap ()

Convert a Win32::GUI::DIBitmap to a new Win32::GUI::Bitmap.

ConvertTo4Bits ()

Convert a Win32::GUI::DIBitmap to a new 4 bits Win32::GUI::DIBitmap.

ConvertTo8Bits ()

Convert a Win32::GUI::DIBitmap to a new 8 bits (grayscale) Win32::GUI::DIBitmap. See ColorQuantize for convert to 8 bits colors.

ConvertTo16Bits555 ()

Convert a Win32::GUI::DIBitmap to a new 16 bits Win32::GUI::DIBitmap (555 format).

ConvertTo16Bits565 ()

Convert a Win32::GUI::DIBitmap to a new 16 bits Win32::GUI::DIBitmap (565 format).

ConvertTo24Bits ()

Convert a Win32::GUI::DIBitmap to a new 24 bits Win32::GUI::DIBitmap.

ConvertTo32Bits ()

Convert a Win32::GUI::DIBitmap to a new 32 bits Win32::GUI::DIBitmap.

ColorQuantize ([flag = FIQ_WUQUANT])

Convert a Win32::GUI::DIBitmap to a new 8 bits (colorscale) Win32::GUI::DIBitmap. None 24 bits image are converted to 24bits before.

Flag possible value : FIQ_WUQUANT = Xiaolin Wu color quantization algorithm FIQ_NNQUANT = NeuQuant neural-net quantization algorithm by Anthony Dekker

Threshold (T)

Convert a Win32::GUI::DIBitmap to a new 1 bit Win32::GUI::DIBitmap using a Threshold between 0..255.

Dither ([flag = FID_FS])

Convert a Win32::GUI::DIBitmap to a new 1 bit Win32::GUI::DIBitmap.

Flag possible value : FID_FS = Floyd and Steinberg error diffusion algorithm. FID_BAYER4x4 = Bayer ordered dispersed dot dithering (order 2 - 4*4 matrix) FID_BAYER8x8 = Bayer ordered dispersed dot dithering (order 3 - 8*8 matrix) FID_CLUSTER6x6 = Ordered clustered dot dithering (order 3 - 6*6 matrix) FID_CLUSTER8x8 = Ordered clustered dot dithering (order 4 - 8*8 matrix) FID_CLUSTER16x16 = Ordered clustered dot dithering (order 8 - 16*16 matrix)

ConvertToStandardType ([scale_linear=TRUE])

TBD

ConvertToType (type, [scale_linear=TRUE])

For type see new method.

DIBitmap Rotating and flipping

Rotate (angle)

Create a new rotated Win32::GUI::DIBitmap (8,24,32 bits only)

This function rotates an 8-bit greyscale, 24- or 32-bit image by means of 3 shears. The angle of rotation is specified by the angle parameter in degrees. Rotation occurs around the center of the image area. Rotated image retains size and aspect ratio of source image (destination image size is usually bigger), so that this function should be used when rotating an image by 90°, 180° or 270°.

RotateEx (angle, x_shift, y_shift, x_origin, y_origin, use_mask)

Create a new rotated/translated Win32::GUI::DIBitmap (8,24,32 bits only)

This function performs a rotation and / or translation of an 8-bit greyscale, 24- or 32-bit image, using a 3rd order (cubic) B-Spline. The rotated image will have the same width and height as the source image, so that this function is better suited for computer vision and robotics. The angle of rotation is specified by the angle parameter in degrees. Horizontal and vertical image translations (in pixel units) are specified by the x_shift and y_shift parameters. Rotation occurs around the center specified by x_origin and y_origin, also given in pixel units. When use_mask is set to TRUE, the irrelevant part of the image is set to a black color, otherwise, a mirroring technique is used to fill irrelevant pixels.

FlipHorizontal ()

Flip DIBitmap dib horizontally along the vertical axis.

FlipVertical ()

Flip DIBitmap vertically along the horizontal axis.

DIBitmap UpSampling / DownSampling

Rescale (new_width, new_heigth, filter=FILTER_BOX)

Create a new size Win32::GUI::DIBitmap (32 bits only)

This function performs resampling (or scaling, zooming) of a 32-bit image to the desired destination width and height. Resampling refers to changing the pixel dimensions (and therefore display size) of an image. When you downsample (or decrease the number of pixels), information is deleted from the image. When you upsample (or increase the number of pixels), new pixels are added based on color values of existing pixels. You specify an interpolation filter to determine how pixels are added or deleted.

The following filters can be used as resampling filters: FILTER_BOX = Box, pulse, Fourier window, 1st order (constant) B-Spline FILTER_BILINEAR = Bilinear filter FILTER_BSPLINE = 4th order (cubic) B-Spline FILTER_BICUBIC = Mitchell and Netravali's two-param cubic filter FILTER_CATMULLROM = Catmull-Rom spline, Overhauser spline FILTER_LANCZOS3 = Lanczos-windowed sinc filter

DIBitmap Color manipulation

AdjustGamma (gamma)

Adjust Gamma of Win32::GUI::DIBitmap (8,24,32 bits only)

The gamma parameter represents the gamma value to use (gamma > 0). A value of 1.0 leaves the image alone, less than one darkens it, and greater than one lightens it.

AdjustBrightness (percentage)

Adjust Brightness of Win32::GUI::DIBitmap (8,24,32 bits only)

Adjusts the brightness of a 8-, 24- or 32-bit image by a certain amount. This amount is given by the percentage parameter, where percentage is a value between [-100..100]. A value 0 means no change, less than 0 will make the image darker and greater than 0 will make the image brighter.

AdjustContrast (percentage)

Adjust ContrastCreate of Win32::GUI::DIBitmap (8,24,32 bits only)

Adjusts the contrast of a 8-, 24- or 32-bit image by a certain amount. This amount is given by the percentage parameter, where percentage is a value between [-100..100]. A value 0 means no change, less than 0 will decrease the contrast and greater than 0 will increase the contrast of the image.

Invert ()

Inverts each pixel data.

GetHistogram (channel)

Return a histogram array[0..255] of a Win32::GUI::DIBitmap (8,24,32 bits only)

Computes the image histogram. For 24-bit and 32-bit images, histogram can be computed from red, green, blue and black channels. For 8-bit images, histogram is computed from the black channel.

DIBitmap Channel methods

Channel Constant
  FICC_RGB     = 0 : Use red, green and blue channels
  FICC_RED     = 1 : Use red channel
  FICC_GREEN   = 2 : Use green channel
  FICC_BLUE    = 3 : Use blue channel
  FICC_ALPHA   = 4 : Use alpha channel
  FICC_BLACK   = 5 : Use black channel
  FICC_REAL    = 6 : Complex images: use real part
  FICC_IMAG    = 7 : Complex images: use imaginary part
  FICC_MAG     = 8 : Complex images: use magnitude
  FICC_PHASE   = 9 : Complex images: use phase
GetChannel (channel)

Return an 8-bit channel Win32::GUI::DIBitmap.

Retrieves the red, green, blue or alpha channel of a 24 or 32-bit BGR[A] image. Channel is the color channel to extract.

SetChannel (channel, 8bit_image)

Set the red, green, blue or alpha channel of a 24 or 32-bit BGR[A] image. Channel is the color channel to set.

GetComplexChannel (channel)

Return a complex channel Win32::GUI::DIBitmap.

Retrieves the red, green, blue or alpha channel of a 24 or 32-bit BGR[A] image. Channel is the color channel to extract.

SetComplexChannel (channel, 8bit_image)

Set the red, green, blue or alpha channel of a 24 or 32-bit BGR[A] image. Channel is the complex channel to set.

DIBitmap Copy/Paste methods

Clone ()

Clone a Win32::GUI::DIBitmap to a new Win32::GUI::Bitmap.

Copy (left, top, right, botton)

Return a new Win32::GUI::Bitmap with a sub part Win32::GUI::DIBitmap (8, 16, 24 or 32 only).

  Left specifies the left position of the cropped rectangle.
  Top specifies the top position of the cropped rectangle.
  Right specifies the right position of the cropped rectangle.
  Bottom specifies the bottom position of the cropped rectangle.
Paste (source_image, left, top, alpha)

Returns TRUE if successful, FALSE otherwise ( 8, 16, 24 or 32 only).

Alpha blend or combine a sub part image with the current dib image. The bit depth must be greater than or equal to the bit depth of source image.

Alpha is alpha blend factor. The source and destination images are alpha blended if alpha=0..255. If alpha > 255, then the source image is combined to the destination image.

Composite ([useFileBkg=FALSE, imageBkg=undef appBkColor=undef)

TBD

DIBitmap Device Context methods

CopyToDC (hdc, [xd=0, yd=0, w=0, h=0, xs=0, ys=0])

Copy Win32::GUI::DIBitmap to a Win32::GUI::DC.

Specify the destination rectangle with xd,yd,w,h option. Specify the begining of the image with xs,ys option. The image copy keep the same size.

AlphaCopyToDC (hdc, [xd=0, yd=0, w=0, h=0, xs=0, ys=0])

Copy Win32::GUI::DIBitmap to a Win32::GUI::DC with transparency/alpha channel support.

Specify the destination rectangle with xd,yd,w,h option. Specify the begining of the image with xs,ys option. The image copy keep the same size.

StretchToDC (hdc, [xd=0, yd=0, wd=0, hd=0, xs=0, ys=0, ws=0, hs=0, flag=SRCCOPY])

Copy Win32::GUI::DIBitmap to a Win32::GUI::DC.

Specify the destination rectangle with xd,yd,wd,hd option. Specify the image source rectangle ith xs,ys,ws,hs option. The image copy is resize if necessary.

For flag option, see StretchDIBits win32 function.

AlphaStretchToDC (hdc, [xd=0, yd=0, wd=0, hd=0, xs=0, ys=0, ws=0, hs=0)

Copy Win32::GUI::DIBitmap to a Win32::GUI::DC with transparency/alpha channel support.

Specify the destination rectangle with xd,yd,wd,hd option. Specify the image source rectangle ith xs,ys,ws,hs option. The image copy is resize if necessary.

MDIBITMAP OBJECT ^

MDIBitmap New methods

new (filename, fif=-1, keep_cache_in_memory=0)

Create a new Win32::GUI::MDIBitmap in edit mode.

newFromFile (filename, read_only=1, keep_cache_in_memory=0)

Create a Win32::GUI::MDIBitmap from a image file.

MDIBitmap Get methods

GetPageCount

Return page count.

GetLockedPageNumbers

Return a list of locked page index.

MDIBitmap Lock methods

LockPage ([index = 0])

Lock and return a page (Win32::GUI::DIBitmap object).

UnlockPage (Win32::GUI::DIBitmap, [update = 0])

Unlock a locked page (Win32::GUI::DIBitmap object). Update indicate if the page must be updated.

MDIBitmap Edit methods

AppendPage (Win32::GUI::DIBitmap)

Append a Win32::GUI::DIBitmap to a Win32::GUI::MDIBBitmap.

InsertPage (Win32::GUI::DIBitmap, [index = 0])

Insert a Win32::GUI::DIBitmap in a Win32::GUI::MDIBBitmap.

DeletePage ([index = 0])

Delete a page from a Win32::GUI::MDIBBitmap.

MovePage (to_index, [from_index = 0])

Move a page in a Win32::GUI::MDIBBitmap.

SEE ALSO ^

Win32::GUI
http://freeimage.sourceforge.net/

AUTHOR ^

Laurent Rocher (lrocher@cpan.org)

COPYRIGHT AND LICENCE ^

Copyright 2003 by Laurent Rocher (lrocher@cpan.org).

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html

Unmodified code from the FreeImage project (http://freeimage.sourceforge.net) is statically linked into this module. The FreeImage code is released under the GNU General Public Licence (http://www.opensource.org/licenses/gpl-license.php) and the FreeImage Public Licence (http://freeimage.sourceforge.net/freeimage-license.txt)

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