Add avif support to ext/gd

This backports avif support from upstream libgd into bundled libgd
and exposes the functionality through new imagecreatefromavif()
and imageavif() function

Add avif support to ext/gd

This backports avif support from upstream libgd into bundled libgd
and exposes the functionality through new imagecreatefromavif()
and imageavif() functions.

Closes GH-7026.

Co-authored-by: Christoph M. Becker <cmbecker69@gmx.de>

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Fix #81032: GD install is affected by external libgd installation

This PR replaces the bundled libgd includes from #include <foo.h> with
#include "foo.h" for gd-related headers to avoid

Fix #81032: GD install is affected by external libgd installation

This PR replaces the bundled libgd includes from #include <foo.h> with
#include "foo.h" for gd-related headers to avoid including headers that
may be available in system directories instead of the expected local
headers.

Closes GH-6975.

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Introduce pseudo-keyword ZEND_FALLTHROUGH

And use it instead of comments

Fix #79676: imagescale adds black border with IMG_BICUBIC

We have to loop over all image pixels to avoid the black border. This
is also done in external libgd in `_gdScaleOneAxis` and `

Fix #79676: imagescale adds black border with IMG_BICUBIC

We have to loop over all image pixels to avoid the black border. This
is also done in external libgd in `_gdScaleOneAxis` and `_gdScalePass`.

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Fix [-Wtype-limits] in bundled GD lib by using signed integers

As seen in the gdImageRotateBicubicFixed() function the same setup
occurs but it uses signed integers, therefore we use als

Fix [-Wtype-limits] in bundled GD lib by using signed integers

As seen in the gdImageRotateBicubicFixed() function the same setup
occurs but it uses signed integers, therefore we use also use
signed integers in gdImageRotateBilinear()

Moreover, these two functions have been removed upstream in
https://github.com/libgd/libgd/commit/bd6d2e101f6f1df106d1cd2e2dc8058a5538109b
therefore we should also mimic upstream and remove them...

Thanks to @cmb69 for pointing it out.

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Add imagegetinterpolation()

While `imagesetinterpolation()` is available as of PHP 5.5.0,
there is no according getter function, so users would have to track the
current interpolatio

Add imagegetinterpolation()

While `imagesetinterpolation()` is available as of PHP 5.5.0,
there is no according getter function, so users would have to track the
current interpolation method manually.

To remedy this, we introduce `imagegetinterpolation()` as thin wrapper
for `gdImageGetInterpolationMethod()` (which has been introduced with
libgd 2.1.1), and use `im->interpolation_id` as fallback for older
libgd. Since our bundled libgd does not yet have this function, we add
it.

We also simplify the recently introduced bug79068.phpt, where it is
sufficient to check that the interpolation method has not been changed.

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Fix hypothetical segfault in gdTransformAffineCopy()

This has been reported to upstream[1], but since ext/gd never calls
`gdTransformAffineCopy()` for a palette image, it is not a bug fo

Fix hypothetical segfault in gdTransformAffineCopy()

This has been reported to upstream[1], but since ext/gd never calls
`gdTransformAffineCopy()` for a palette image, it is not a bug for PHP.
Therefore we apply the fix to master only.

[1] <https://github.com/libgd/libgd/issues/586>

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Fix #79068: gdTransformAffineCopy() changes interpolation method

We port
<https://github.com/libgd/libgd/commit/9088591eae437358ee5b929adf82865e37e3001e>.

Fix #79067: gdTransformAffineCopy() may use unitialized values

We port
<https://github.com/libgd/libgd/commit/7a06c1669c563917bc48c464521e3de962ddb4e8>.

Use e.g. instead of less common f.e. [ci skip]

Suppress shift UB in gd_itofx()

There doesn't seem to be a corresponding upstream fix for this.

Remove unused _setEdgePixel() and getPixelOverflowColorTC() functions

Fix fabs warning in gd_interpolation.c

Matches upstream code.

Fix misleading variable type

We port libgd/libgd@0414bb2da0b27d90b6125bd34a3e2cfb89fd3f42.

Remove unused variables and functions

We remove the unused variables altogether, and port
libgd/libgd@f50c24e467f1f44f0ede90bc7d2d8eaadbe11094 to silence the
compiler warnings.

Fix #73281: imagescale(…, IMG_BILINEAR_FIXED) can cause black border

We port the upstream fixes for libgd/libgd#329 and libgd/libgd#224.

Fix #77272: imagescale() may return image resource on failure

`_gdScaleHoriz()` and `_gdScaleVert()` may fail, but don't signal
failure since they are void functions. We change that acc

Fix #77272: imagescale() may return image resource on failure

`_gdScaleHoriz()` and `_gdScaleVert()` may fail, but don't signal
failure since they are void functions. We change that according to
upstream libgd.

We also remove the unused `Scale()` function, which doesn't exist in
upstream libgd either, right away.

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Fix #77269: Potential unsigned underflow in gdImageScale

Belatedly, we're porting the respective upstream patch[1].

[1] <https://github.com/libgd/libgd/commit/60bfb401ad5a4a8ae995dc

Fix #77269: Potential unsigned underflow in gdImageScale

Belatedly, we're porting the respective upstream patch[1].

[1] <https://github.com/libgd/libgd/commit/60bfb401ad5a4a8ae995dcd36372fe15c71e1a35>

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Fix #77269: Potential unsigned underflow in gdImageScale

Belatedly, we're porting the respective upstream patch[1].

[1] <https://github.com/libgd/libgd/commit/60bfb401ad5a4a8ae995dc

Fix #77269: Potential unsigned underflow in gdImageScale

Belatedly, we're porting the respective upstream patch[1].

[1] <https://github.com/libgd/libgd/commit/60bfb401ad5a4a8ae995dcd36372fe15c71e1a35>

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Removed unused variables

Trailing whitespaces

Signed-off-by: Gabriel Caruso <carusogabriel34@gmail.com>

Define floorf if system doesn't have it (follow up for 22c48761)

floorf is checked in config.m4

Fixed bug #65148 (imagerotate may alter image dimensions)

We apply the respective patches from external libgd, work around the
still missing `gdImageClone()`, and fix the special cased r

Fixed bug #65148 (imagerotate may alter image dimensions)

We apply the respective patches from external libgd, work around the
still missing `gdImageClone()`, and fix the special cased rotation
routines according to Pierre's patch
(https://gist.github.com/pierrejoye/59d72385ed1888cf8894a7ed437235ae).

We also cater to bug73272.phpt whose result obviously changes a bit.

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Fixed bug #75139 (libgd/gd_interpolation.c:1786: suspicious if ?)

We back-port https://github.com/libgd/libgd/commit/dd48286 even though
we cannot come up with a regression test, because

Fixed bug #75139 (libgd/gd_interpolation.c:1786: suspicious if ?)

We back-port https://github.com/libgd/libgd/commit/dd48286 even though
we cannot come up with a regression test, because the erroneous
condition appears to be impossible to trigger.

We also parenthesize the inner ternary operation to avoid confusion.

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Fix #73279: Integer overflow in gdImageScaleBilinearPalette()

The color components are supposed to be in range 0..255, so we must not
cast them to `signed char`, what can be the default

Fix #73279: Integer overflow in gdImageScaleBilinearPalette()

The color components are supposed to be in range 0..255, so we must not
cast them to `signed char`, what can be the default for `char`.

Port of <https://github.com/libgd/libgd/commit/77c8d359>.

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