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TGA: Support for TGA specification 2.0

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Adds TGA 2.0 compliance:
- Support for Extension Area, Developer Area and Footer (metadata support)
- Support for 15-bit and 16-bit per pixel images (both RGB and Indexed)
- Full support for rotation on reading (we cannot use Qt transformations because only a subset is part of the TGA specification)
- When writing you can choose the supported version (subType)
- Improved writing speed (approximately 10 times) and removed whole image conversions (significant memory savings)

It pass the [TrueVision TGA 2.0 conformance suite](https://github.com/zigimg/test-suite/tree/master/fixtures/tga).

Test changes:
- Read test: added ability to skip a specific test on sequential devices (via JSON behavior file)
- Write test: added the ability to set the subType when writing (via JSON properties file)

Closes #37
This commit is contained in:
Mirco Miranda
2025-08-23 11:20:09 +02:00
committed by Albert Astals Cid
parent f933cbe12d
commit 9c6c0c01ae
31 changed files with 1054 additions and 200 deletions
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32
autotests/README.md
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@ -88,30 +88,33 @@ are iterated sequentially and the first object that matches the requirements
is used for testing (successes are ignored).
Supported values ​​for JSON objects:
- `comment`: Type string. A string shown by the test when a condition occurs.
- `description`: Type string. A description of the object. Not used by the
- `comment`: Type `string`. A string shown by the test when a condition occurs.
- `description`: Type `string`. A description of the object. Not used by the
test.
- `disableAutoTransform`: Type boolean. By default, tests are run with
- `disableAutoTransform`: Type `boolean`. By default, tests are run with
autotransform enabled (i.e. rotation is applied if the plugin supports it).
Set to `true` to disable autotransform.
- `filename`: Type string. Name of the template file to use. E.g.
- `filename`: Type `string`. Name of the template file to use. E.g.
"testRGB_Qt_6_2.png".
- `fuzziness`: Type integer. Set the fuzziness only if not already set on the
- `fuzziness`: Type `integer`. Set the fuzziness only if not already set on the
command line. The value set on the command line wins over the one in the JSON
file.
- `maxQtVersion`: Type string. Maximum Qt version this object is compatible
- `maxQtVersion`: Type `string`. Maximum Qt version this object is compatible
with (if not set means all). E.g. "6.2.99".
- `metadata`: Type Array. An array of key/value objects (string type)
- `metadata`: Type `array`. An array of key/value objects (string type)
containing the image metadata as returned by `QImage::text`.
- `minQtVersion`: Type string. Minimum Qt version this object is compatible
- `minQtVersion`: Type `string`. Minimum Qt version this object is compatible
with (if not set means all). E.g. "6.2.0".
- `perceptiveFuzziness` Type boolean. Set the perceptive fuzziness only if not
- `perceptiveFuzziness` Type `boolean`. Set the perceptive fuzziness only if not
already set on the command line. The value set on the command line wins over
the one in the JSON file.
- `resolution`: Type object. An object with the `dotsPerMeterX` and
- `resolution`: Type `object`. An object with the `dotsPerMeterX` and
`dotsPerMeterY` (integer) values ​​of the image.
- `seeAlso`: Type string. More info about the object. Normally used to point
- `seeAlso`: Type `string`. More info about the object. Normally used to point
to bug reports. Not used by the test.
- `skipSequential`: Type `boolean`. Skip the test on sequential access device.
Some plugins may have limited functionality on sequential devices (e.g.,
not reading metadata).
- `unsupportedFormat`: Type `boolean`. When true, the test is skipped.
Some examples:
@ -169,11 +172,12 @@ See also [Add a test to CMakeLists.txt](#add-a-test-to-cmakeliststxt).
The properties file must be located in `write/basic` and must have the name
of the file format (e.g. jxl.json). It is a JSON object composed of the
following values:
- `format`: Type string. The format tested.
- `metadata`: Type Array. An array of key/value objects (string type)
- `format`: Type `string`. The format tested.
- `metadata`: Type `array`. An array of key/value objects (string type)
containing the image metadata as returned by `QImage::text`.
- `resolution`: Type object. An object with the `dotsPerMeterX` and `
- `resolution`: Type `object`. An object with the `dotsPerMeterX` and `
dotsPerMeterY` (integer) values ​​of the image.
- `subType`: type `string`. The image writer subtype to set when testing.
[This is an example](write/basic/jxl.json) of property file.