fmt

Response image format.

fmt=format [,pixelType ]

format	jpeg \| png \| png-alpha \| tif \| tif-alpha \| swf \| pdf \| gif \| gif-alpha \| fxg \| fxgraw
	Specifies the image encoding format for image data sent to the client and the corresponding response MIME type for the HTTP reply header. jpeg : lossy JPEG png : loss-less PNG png-alpha : loss-less PNG with alpha channel tif : TIFF tif-alpha : TIFF with alpha channel swf : lossy JPEG embedded into an Adobe swf file pdf : image embedded in PDF gif : GIF with 2 to 256 colors gif-alpha : GIF with 2 to 255 colors plus key-color transparency fxg : FXG with variables and DOM manipulation applied fxgraw : original FXG stored on server
pixelType	rgb \| gray \| cmyk
	Can be used to effect output color space. rgb : return RGB image data gray : return gray-scale image data cmyk : return CMYK image data

tiffCompression is permitted only if tif, tif-alpha is specified as the format. Refer to the table below for the compression options supported for these image formats.

qlt= can be used to set the JPEG encoding options for these formats: JPEG, TIFF with JPEG compression. quantize= can be used if fmt=gif or fmt=gif-alpha. Refer to the command descriptions for details. The other formats do not have settable options.

8-bits per pixel component are returned for all formats and pixelTypes[7].

The following table lists the valid combinations of format and pixelType, the corresponding HTTP response MIME types.

format	pixelType	Response MIME type	Embed ICC profile	Options
jpeg	rgb, gray, cmyk	<image/jpeg>	yes	qlt=
png, png-alpha	rgb, gray	<image/png>	yes
tif, tif-alpha	rgb, gray, cmyk	<image/tiff>	yes	tiffCompression ( none \| lzw \| zip \| jpeg), qlt=
swf, swf-alpha	rgb	<application/x-shockwave-flash>	no	qlt=
pdf	rgb, gray, cmyk	<application/pdf>	yes
gif, gif-alpha	rgb, gray	<image/gif>	no	quantize=