Index of values

equivalent with Bytes.unsafe_set

equivalent with Bytes.set

equivalent with Array.unsafe.get

Add a new color into the given colormap and return its index.

Add the list of new colors into the given colormap and return their indices.

If you write new drivers for some image format, use this function to register their loading/saving functions into the libaray

Convert an Images.t value to an array of colors.

blit src sx sy dst dx dy width height copies the rectangle region of src at (sx, sy) - (sx + width - 1, sy + height - 1) to dst, at (dx, dy) - (dx + width - 1, dy + height - 1).

blit src x y dst x' y' w h copies rectangular area of src at x,y with size wxh, to an image dst.

check width height x y checks whether the point (x,y) is in the region of (0, 0) - (width - 1, height - 1).

Checks the file header

Checks the file header

Checks the file header of a png image.

Checks the file header

Checks the file header

Checks the file header

copy t duplicates the image t.

Copy a colormap

Same as Gdk.Image.create, but with size info

create w h creates an image with a size wxh.

Get one of the first finding of the followings: exif DateTimeOriginal ifd_0 DateTime

You need manual destroy

Free the image.

destroy t explicitly frees the image content of t.

Info query

Draw an Images.t value into the graphic window.

functions for internal use

Get exif DateTimeOriginal

Functions for filename extensions

file_format filename reads the header of image file filename and returns its format and some useful information found in the header (ex.

Finds a color in the colormap and returns its color index.

format does decode + unpack

get t x y gets image pixel of t at x,y.

Return the bounding box option of the postscript image inside the file argument.

get_color x y returns image pixel color value of t at x,y.

Lower interface

get_image x y w h Capture the contents of a rectangle of the graphic window with lower left corner at x,y, width w and height h

Returns number of glyphs stored in the face.

returns the image format guessed from the file extension of a given file name

Get ifd_0 DateTime

Convert an Graphics.image value to *our* image

init () initializes the Freetype library.

Returns image info and its thumbnail

Loads an xpm image.

Loads a tiff image.

Loads a postscript image.

Ppm.load filename reads the image contained in the file filename, and returns an image.

Loads a png image.

Loads a jpeg image.

load filename options read the header of an image file filename, loads the image by calling corresponding loading method, and returns it.

Loads a gif image sequence

Loads a bmp image.

Loads a png image, and coerce it to Rgb24.

Same as above for portable bitmaps.

Loads the first frame of a gif image sequence.

Option queries

Loads a postscript image within a bounding box.

Loads a gif image sequence, but to more general type

make w h c creates an image with a size wxh.

map f src x y dst x' y' w h maps pixels of the rectangular area of src at x,y with size wxh, to an image dst, using color conversion function f.

new_face library fontfile n loads n-th font stored in the font file fontfile, and returns its face and face information.

norm_crlf last_was_cr buf offs len returns buf with CRLF/CR/LF converted to LF, and a flag indicating whether last char was CR.

Convert an Images.t value to a graphic image.

Image format conversion functions between Rgba32.t images

To convert DateTime string to DateTime.t.

I had an Android phone which created DateTime tag with a little endian encoded unsigned int32 of unix time! This function tries to fix the issue.

range_check bs from to_ raises Invalid_argument "index out of bounds" when from and to_ are invalid range for bs.

Open the file, read the markers, then close it immediately.

resize progress t w h creates a resized image of t with size wxh.

Rgb specialized functions (for backward compatibility)

Save xv thumbnail.

Save a full-color image in tiff format file.

Save a full-color image in the Encapuslated PS format file.

Ppm.save : filename img stores image img, on file filename.

Saves an image into a png file format.

Save a full-color image in jpeg format file.

save filename formatopt options image saves image into a file filename.

Saves a gif image sequence

Save an image in bmp format file.

This converts RGB images to CMYK, but the color conversion is not something fancy.

Load and save functions for BMP images.

Create CMYK jpeg image sample.

Saves an image as a gif file with only one frame

Specialized version for portable bitmaps.

Same as save but it also writes markers

set t x y c sets image pixel of t at x,y by the color c.

set_char_size face charw charh resh resv sets the character size of face.

set_pixel_sizes face pixw pixh also sets the character size of face.

Returns size (width and height) of image

Colormap manipulation functions

sub dst x y width height returns sub-bitmap of dst, at (x, y) - (x + width - 1, y + height - 1).

sub t x y w h duplicates a subimage of t of size wxh, whose origin (0,0) is at (x,y) of t.

to_rgb? ~failsafe t: Image format conversion functions to Rgb24.t and Rgba32.t images.

Tag name requires IFD.t since the same tag number has different meaning in IFD and GPS

unpack format components packed components are the number of elements in packed, not the bytes of packed.

Unsafe versions of get and set.