<cimg/>

Provided by module: Graphics: Image converter

Manipulates and converts images between different image formats. Provides the tag <cimg> that makes it is possible to convert, resize, crop and in other ways transform images.

Attributes

src="url"

The path to the indata file.

<cimg src='/internal-roxen-testimage'/>

data="imagedata"

Insert images from other sources, e.g. databases through entities or variables.

<emit source='sql' query='select imagedata from images where id=37'> <cimg data='&sql.imagedata;'/> </emit>

format="{gif, jpeg, png, avs, gmp, bd, hrz, ilbm, psx, pnm, ps, pvr, tga, tiff, wbf, xbm, xpm}" (gif)

The format to encode the image to. The formats available are:

Acronym	Acronym interpretation
gif	Graphics Interchange Format (might be missing in your roxen)
jpeg	Joint Photography Expert Group image compression
png	Portable Networks Graphics
avs	Advanced Visual Systems Inc. image format
bmp	Windows BitMaP file
gd	Internal format used by libgd
hrz	HRZ is (was?) used for amatuer radio slow-scan TV.
ilbm	Interchangeable File Format: interleaved bitmap
pcx	Zsoft PCX file format (PC / DOS)
pnm	Portable AnyMap
ps	Adobe PostScript file
pvr	Pover VR (dreamcast image)
tga	TrueVision Targa (PC / DOS)
tiff	Tag Image File Format
wbf	WAP Bitmap File
xbm	XWindows Bitmap File
xpm	XWindows Pixmap File

<cimg src='/internal-roxen-testimage' format='png'/>

<cimg src='/internal-roxen-testimage' format='gif'/>

quant="number" (format dependant)

The number of colors to quantizize the image to.

Default for gif is 32(+1 transparent), for most other formats (except black and white) is it unlimited.

<cimg src='/internal-roxen-testimage' quant='2'/>

dither="{none, random, floyd-steinberg}" (none)

Choose the dithering method.

Method	Meaning
none	No dithering is performed at all.
random	Random scatter dither. Not visually pleasing, but it is useful for very high resolution printing.
floyd-steinberg	Error diffusion dithering. Usually the best dithering method.

<cimg src='/internal-roxen-testimage' dither='random' quant='10'/>

<cimg src='/internal-roxen-testimage' dither='floyd-steinberg' quant='10'/>

true-alpha

If present, render a real alpha channel instead of on/off alpha. If the file format only supports on/off alpha, the alpha channel is dithered using a floyd-steinberg dither.

<cimg src='/internal-roxen-testimage' opaque-value='20'/>

<cimg src='/internal-roxen-testimage' opaque-value='20' true-alpha='1'/>

background-color="color" (taken from the page)

The color to render the image against.

<cimg src='/internal-roxen-testimage' background-color='red' opaque-value='50'/>

opaque-value="percentage" (100)

The transparency value to use, 100 is fully opaque, and 0 is fully transparent.

cs-rgb-hsv="{0, 1}" (0)

Perform rgb to hsv colorspace conversion.

<cimg src='/internal-roxen-testimage' cs-rgb-hsv='1'/>

gamma="number" (1.0)

Perform gamma adjustment.

<cimg src='/internal-roxen-testimage' gamma='0.5'/>

<cimg src='/internal-roxen-testimage' gamma='1.5'/>

cs-grey="{0, 1}" (0)

Perform rgb to greyscale colorspace conversion.

<cimg src='/internal-roxen-testimage' cs-grey='1'/>

cs-invert="{0, 1}" (0)

Invert all colors

<cimg src='/internal-roxen-testimage' cs-invert='1'/>

cs-hsv-rgb="{0, 1}" (0)

Perform hsv to rgb colorspace conversion.

<cimg src='/internal-roxen-testimage' cs-hsv-rgb='1'/>

rotate-cw="degree" (0)

Rotate the image clock-wise.

<cimg src='/internal-roxen-testimage' rotate-cw='20'/>

rotate-ccw="degree" (0)

Rotate the image counter clock-wise.

rotate-unit="{rad, deg, ndeg, part}" (deg)

Select the unit to use while rotating.

Unit	Meaning
rad	Radians
deg	Degrees
ndeg	'New' degrees (400 for each full rotation)
part	0 - 1.0 (1.0 == full rotation)

mirror-x="{0, 1}" (0)

Mirror the image around the X-axis.

mirror-y="{0, 1}" (0)

Mirror the image around the Y-axis.

scale="fact" (1.0)

Scale fact times. (0.5 -> half size, 2.0 -> double size)

<cimg src='/internal-roxen-testimage' scale='0.5'/>

scale="x,y"

Scale to the exact size x,y. If either of X or Y is zero, the image is scaled to the specified width or hight, and the value that is zero is scaled in proportion to the other value.

<cimg src='/internal-roxen-testimage' scale='20,50'/>

max-width="xsize"

If width is larger than 'xsize', scale width to 'xsize' while keeping aspect.

max-height="ysize"

If height is larger than 'ysize', scale height to 'ysize' while keeping aspect.

span-width="xsize"

If width is larger than 'xsize', scale width to 'xsize' while keeping aspect. If width is smaller than 'xsize', extend width to 'xsize' by filling the new space with current background color.

<cimg src='/internal-roxen-testimage' span-width="350" background-color='white'/>

span-height="ysize"

If height is larger than 'ysize', scale height to 'ysize' while keeping aspect. If height is smaller than 'ysize', extend height to 'ysize' by filling the new space with current background color.

<cimg src='/internal-roxen-testimage' span-height="350" background-color='white'/>

x-offset="pixels" (0)

Cut n pixels from the beginning of the X scale.

<cimg src='/internal-roxen-testimage' x-offset='100'/>

y-offset="pixels" (0)

Cut n pixels from the beginning of the Y scale.

x-size="pixels" (whole image)

Keep n pixels from the beginning of the X scale.

<cimg src='/internal-roxen-testimage' x-size='100'/>

y-size="pixels" (whole image)

Keep n pixels from the beginning of the Y scale.

crop="{x1,y1-x2,y2, auto, guides-cross, guides-region}"

Crops the image by using several differen methods. The simplest is to only specify the area to be cropped with x,y-x,y coordinates. By instead selecting "auto" the image will be cropped so that as many pixels as possible with the same color is removed from around the image.

A more advanced cropping method can be used by giving the crop argument "guides-cross". The image will then be cropped around the intersection of two guides inside the image. Guides can be added to e.g. Photoshop and GIMP images. If several guides are present, which ones to use can be selected with the guides-index=x,y attribute, where x and y is the number of the guides. Guides cross cropping is usefull together with max-width and max-height attributes when creating thumb nails.

A combination of guides cross cropping can be used by giving the crop argument "guides-region". In this cropping mode the area enclosed by two horizontal and two vertical guides are saved. Which guides to use is given by the guides-index=x1,y1-x2,y2 attribute, where the x and y parameters are the number of the guides. Guides can also be specified as guides-index=x,y. Then the saved area will be the one enclosed by the buides x,y and x+1,y+1, counting from left and top. Again, combine max-width and max-height makes a good effect, since scaling is performed after cropping.

<cimg src='/internal-roxen-testimage' crop='50,28-150,92'/>

jpeg-quality="percentage" (75)

Set the quality on the output jpeg image.

<cimg src='/internal-roxen-testimage' format='jpeg' jpeg-quality='30'/>

<cimg src='/internal-roxen-testimage' format='jpeg' jpeg-quality='1'/>

jpeg-optimize="{0, 1}" (1)

If 0, do not generate optimal tables. Somewhat faster, but produces bigger files.

jpeg-progressive=="{0, 1}" (0)

Generate progressive jpeg images.

jpeg-smooth="0-100" (0)

Smooth the image while compressing it. This produces smaller files, but might undo the effects of dithering.

bmp-bpp="1,4,8,24" (24)

Force this number of bits per pixel for bmp images.

bmp-windows="{0, 1}" (1)

Windows or OS/2 mode, default is 1. (windows mode)

bmp-rle="{0, 1}" (0)

RLE 'compress' the BMP image.

gd-alpha_index="color" (0)

Color in the colormap to make transparent for GD-images with alpha channel.

pcx-raw="{1, 0}" (0)

If 1, do not RLE encode the PCX image.

pcx-dpy="0-10000000.0" (75.0)

Resolution, in pixels per inch.

pcx-xdpy="0-10000000.0" (75.0)

Resolution, in pixels per inch.

pcx-ydpy="0-10000000.0" (75.0)

Resolution, in pixels per inch.

pcx-xoffset="0-imagexsize-2" (0)

Offset from start of image data to image content for PCX images. Unused by most programs.

pcx-yoffset="0-imageysize-2" (0)

Offset from start of image data to image content for PCX images. Unused by most programs.

tga-raw="{1, 0}" (0)

If 1, do not RLE encode the Targa image.

ps-dpi="0-10000000.0" (75.0)

Dots per inch for the resulting postscript file.