Supported Image File Formats/en: Unterschied zwischen den Versionen
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Although expecco supports a wide range of bitmap image formats, |
Although expecco supports a wide range of bitmap image formats, some rarely used formats are not supported, or only supported with limitations. |
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some seldom used formats are not supported, or only supported with limitations. |
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== GIF == |
== GIF == |
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Reading and writing of 8 bit/pixel palette images is supported. |
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Other images should be converted to 8bpp before writing. |
Other images should be converted to 8bpp before writing. |
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Tiled images with multiple palettes are not supported. |
Tiled images with multiple palettes are not supported. |
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== JPEG == |
== JPEG == |
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Reading and writing of 24bit/pixel is supported. |
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Expecco uses the |
Expecco uses the libjpeg library, so any format supported by that (standard) library will also be supported by expecco. |
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== PNG == |
== PNG == |
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* Grayscale + alpha: reading unsupported (as of 2.11) |
* Grayscale + alpha: reading unsupported (as of 2.11) |
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* 16bit RGB + alpha: incorrect display |
* 16bit RGB + alpha: incorrect display |
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* tRNS chunk with alpha values (only on-off masks) |
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When writing, expecco will always generate either 8bpp palette, or 24bpp truecolor images. |
When writing, expecco will always generate either 8bpp palette, or 24bpp truecolor images. |
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== BMP == |
== BMP == |
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1,4,8,24 and 32 bpp files can be read and written. |
1, 4, 8, 24 and 32 bpp files can be read and written. |
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== TIFF == |
== TIFF == |
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Most formats are supported in reading, with some limitations: |
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* supported compressions: |
* supported compressions: |
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** CCITT group3 FAX compression |
** CCITT group3 FAX compression |
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** LZW |
** LZW |
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** packbits |
** packbits |
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1, 4, 8 and 24 bit files can be written. Data is always written uncompressed. No support for image masks or alpha channels. |
1, 4, 8 and 24 bit files can be written. Data is always written uncompressed. No support for image masks or alpha channels. |
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== XBM == |
== XBM == |
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Both, reading and writing |
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== XPM == |
== XPM == |
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Some restrictions apply (to be documented) |
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== Other Formats == |
== Other Formats == |
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Support for other formats, which are more or less of historic interest, |
Support for other formats, which are more or less of historic interest, can be made available upon request and at some extra charge: XWD, Targa, Sun-Raster, PICT, PCX, PBM, OSX-Icon, IrisRGB. Also, subset of the AVI and FLI formats can be provided if there is a need. |
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can be made available upon request and at some extra charge: XWD, Targa, Sun-Raster, PICT, PCX, PBM, OSX-Icon, IrisRGB. Also, subset of the AVI and FLI formats can be provided if there is a need. |
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Version vom 5. Juni 2017, 12:48 Uhr
Although expecco supports a wide range of bitmap image formats, some rarely used formats are not supported, or only supported with limitations.
GIF[Bearbeiten]
Reading and writing of 8 bit/pixel palette images is supported. Other images should be converted to 8bpp before writing. Tiled images with multiple palettes are not supported.
JPEG[Bearbeiten]
Reading and writing of 24bit/pixel is supported. Expecco uses the libjpeg library, so any format supported by that (standard) library will also be supported by expecco.
PNG[Bearbeiten]
(see http://www.schaik.com/pngsuite/pngsuite.html)
- Grayscale + alpha: reading unsupported (as of 2.11)
- 16bit RGB + alpha: incorrect display
- tRNS chunk with alpha values (only on-off masks)
When writing, expecco will always generate either 8bpp palette, or 24bpp truecolor images.
BMP[Bearbeiten]
1, 4, 8, 24 and 32 bpp files can be read and written.
TIFF[Bearbeiten]
Most formats are supported in reading, with some limitations:
- supported compressions:
- CCITT group3 FAX compression
- LZW
- packbits
1, 4, 8 and 24 bit files can be written. Data is always written uncompressed. No support for image masks or alpha channels.
XBM[Bearbeiten]
Both, reading and writing
XPM[Bearbeiten]
Some restrictions apply (to be documented)
Other Formats[Bearbeiten]
Support for other formats, which are more or less of historic interest, can be made available upon request and at some extra charge: XWD, Targa, Sun-Raster, PICT, PCX, PBM, OSX-Icon, IrisRGB. Also, subset of the AVI and FLI formats can be provided if there is a need.
