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PhabricatorImageTransformer.php
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Created
Fri, May 17, 18:21
Size
7 KB
Mime Type
text/x-php
Expires
Sun, May 19, 18:21 (1 d, 23 h)
Engine
blob
Format
Raw Data
Handle
17731792
Attached To
rPH Phabricator
PhabricatorImageTransformer.php
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<?php
final
class
PhabricatorImageTransformer
{
public
function
executeMemeTransform
(
PhabricatorFile
$file
,
$upper_text
,
$lower_text
)
{
$image
=
$this
->
applyMemeTo
(
$file
,
$upper_text
,
$lower_text
);
return
PhabricatorFile
::
newFromFileData
(
$image
,
array
(
'name'
=>
'meme-'
.
$file
->
getName
(),
));
}
public
function
executeThumbTransform
(
PhabricatorFile
$file
,
$x
,
$y
)
{
$image
=
$this
->
crudelyScaleTo
(
$file
,
$x
,
$y
);
return
PhabricatorFile
::
newFromFileData
(
$image
,
array
(
'name'
=>
'thumb-'
.
$file
->
getName
(),
));
}
public
function
executeProfileTransform
(
PhabricatorFile
$file
,
$x
,
$min_y
,
$max_y
)
{
$image
=
$this
->
crudelyCropTo
(
$file
,
$x
,
$min_y
,
$max_y
);
return
PhabricatorFile
::
newFromFileData
(
$image
,
array
(
'name'
=>
'profile-'
.
$file
->
getName
(),
));
}
public
function
executePreviewTransform
(
PhabricatorFile
$file
,
$size
)
{
$image
=
$this
->
generatePreview
(
$file
,
$size
);
return
PhabricatorFile
::
newFromFileData
(
$image
,
array
(
'name'
=>
'preview-'
.
$file
->
getName
(),
));
}
private
function
crudelyCropTo
(
PhabricatorFile
$file
,
$x
,
$min_y
,
$max_y
)
{
$data
=
$file
->
loadFileData
();
$img
=
imagecreatefromstring
(
$data
);
$sx
=
imagesx
(
$img
);
$sy
=
imagesy
(
$img
);
$scaled_y
=
(
$x
/
$sx
)
*
$sy
;
if
(
$scaled_y
>
$max_y
)
{
// This image is very tall and thin.
$scaled_y
=
$max_y
;
}
else
if
(
$scaled_y
<
$min_y
)
{
// This image is very short and wide.
$scaled_y
=
$min_y
;
}
$img
=
$this
->
applyScaleTo
(
$img
,
$x
,
$scaled_y
);
return
$this
->
saveImageDataInAnyFormat
(
$img
,
$file
->
getMimeType
());
}
/**
* Very crudely scale an image up or down to an exact size.
*/
private
function
crudelyScaleTo
(
PhabricatorFile
$file
,
$dx
,
$dy
)
{
$data
=
$file
->
loadFileData
();
$src
=
imagecreatefromstring
(
$data
);
$dst
=
$this
->
applyScaleTo
(
$src
,
$dx
,
$dy
);
return
$this
->
saveImageDataInAnyFormat
(
$dst
,
$file
->
getMimeType
());
}
private
function
applyScaleTo
(
$src
,
$dx
,
$dy
)
{
$x
=
imagesx
(
$src
);
$y
=
imagesy
(
$src
);
$scale
=
min
((
$dx
/
$x
),
(
$dy
/
$y
),
1
);
$dst
=
imagecreatetruecolor
(
$dx
,
$dy
);
imagesavealpha
(
$dst
,
true
);
imagefill
(
$dst
,
0
,
0
,
imagecolorallocatealpha
(
$dst
,
255
,
255
,
255
,
127
));
$sdx
=
$scale
*
$x
;
$sdy
=
$scale
*
$y
;
imagecopyresampled
(
$dst
,
$src
,
(
$dx
-
$sdx
)
/
2
,
(
$dy
-
$sdy
)
/
2
,
0
,
0
,
$sdx
,
$sdy
,
$x
,
$y
);
return
$dst
;
}
public
static
function
getPreviewDimensions
(
PhabricatorFile
$file
,
$size
)
{
$data
=
$file
->
loadFileData
();
$src
=
imagecreatefromstring
(
$data
);
$x
=
imagesx
(
$src
);
$y
=
imagesy
(
$src
);
$scale
=
min
(
$size
/
$x
,
$size
/
$y
,
1
);
$dx
=
max
(
$size
/
4
,
$scale
*
$x
);
$dy
=
max
(
$size
/
4
,
$scale
*
$y
);
$sdx
=
$scale
*
$x
;
$sdy
=
$scale
*
$y
;
return
array
(
'x'
=>
$x
,
'y'
=>
$y
,
'dx'
=>
$dx
,
'dy'
=>
$dy
,
'sdx'
=>
$sdx
,
'sdy'
=>
$sdy
);
}
private
function
generatePreview
(
PhabricatorFile
$file
,
$size
)
{
$data
=
$file
->
loadFileData
();
$src
=
imagecreatefromstring
(
$data
);
$dimensions
=
self
::
getPreviewDimensions
(
$file
,
$size
);
$x
=
$dimensions
[
'x'
];
$y
=
$dimensions
[
'y'
];
$dx
=
$dimensions
[
'dx'
];
$dy
=
$dimensions
[
'dy'
];
$sdx
=
$dimensions
[
'sdx'
];
$sdy
=
$dimensions
[
'sdy'
];
$dst
=
imagecreatetruecolor
(
$dx
,
$dy
);
imagesavealpha
(
$dst
,
true
);
imagefill
(
$dst
,
0
,
0
,
imagecolorallocatealpha
(
$dst
,
255
,
255
,
255
,
127
));
imagecopyresampled
(
$dst
,
$src
,
(
$dx
-
$sdx
)
/
2
,
(
$dy
-
$sdy
)
/
2
,
0
,
0
,
$sdx
,
$sdy
,
$x
,
$y
);
return
$this
->
saveImageDataInAnyFormat
(
$dst
,
$file
->
getMimeType
());
}
private
function
applyMemeTo
(
PhabricatorFile
$file
,
$upper_text
,
$lower_text
)
{
$data
=
$file
->
loadFileData
();
$img
=
imagecreatefromstring
(
$data
);
$phabricator_root
=
dirname
(
phutil_get_library_root
(
'phabricator'
));
$font_root
=
$phabricator_root
.
'/resources/font/'
;
$font_path
=
$font_root
.
'tuffy.ttf'
;
if
(
Filesystem
::
pathExists
(
$font_root
.
'impact.ttf'
))
{
$font_path
=
$font_root
.
'impact.ttf'
;
}
$text_color
=
imagecolorallocate
(
$img
,
255
,
255
,
255
);
$border_color
=
imagecolorallocatealpha
(
$img
,
0
,
0
,
0
,
110
);
$border_width
=
4
;
$font_max
=
200
;
$font_min
=
5
;
for
(
$i
=
$font_max
;
$i
>
$font_min
;
$i
--)
{
$fit
=
$this
->
doesTextBoundingBoxFitInImage
(
$img
,
$upper_text
,
$i
,
$font_path
);
if
(
$fit
[
'doesfit'
])
{
$x
=
(
$fit
[
'imgwidth'
]
-
$fit
[
'txtwidth'
])
/
2
;
$y
=
$fit
[
'txtheight'
]
+
10
;
$this
->
makeImageWithTextBorder
(
$img
,
$i
,
$x
,
$y
,
$text_color
,
$border_color
,
$border_width
,
$font_path
,
$upper_text
);
break
;
}
}
for
(
$i
=
$font_max
;
$i
>
$font_min
;
$i
--)
{
$fit
=
$this
->
doesTextBoundingBoxFitInImage
(
$img
,
$lower_text
,
$i
,
$font_path
);
if
(
$fit
[
'doesfit'
])
{
$x
=
(
$fit
[
'imgwidth'
]
-
$fit
[
'txtwidth'
])
/
2
;
$y
=
$fit
[
'imgheight'
]
-
10
;
$this
->
makeImageWithTextBorder
(
$img
,
$i
,
$x
,
$y
,
$text_color
,
$border_color
,
$border_width
,
$font_path
,
$lower_text
);
break
;
}
}
return
$this
->
saveImageDataInAnyFormat
(
$img
,
$file
->
getMimeType
());
}
private
function
makeImageWithTextBorder
(
$img
,
$font_size
,
$x
,
$y
,
$color
,
$stroke_color
,
$bw
,
$font
,
$text
)
{
$angle
=
0
;
$bw
=
abs
(
$bw
);
for
(
$c1
=
$x
-
$bw
;
$c1
<=
$x
+
$bw
;
$c1
++)
{
for
(
$c2
=
$y
-
$bw
;
$c2
<=
$y
+
$bw
;
$c2
++)
{
if
(!((
$c1
==
$x
-
$bw
||
$x
+
$bw
)
&&
$c2
==
$y
-
$bw
||
$c2
==
$y
+
$bw
))
{
$bg
=
imagettftext
(
$img
,
$font_size
,
$angle
,
$c1
,
$c2
,
$stroke_color
,
$font
,
$text
);
}
}
}
imagettftext
(
$img
,
$font_size
,
$angle
,
$x
,
$y
,
$color
,
$font
,
$text
);
}
private
function
doesTextBoundingBoxFitInImage
(
$img
,
$text
,
$font_size
,
$font_path
)
{
// Default Angle = 0
$angle
=
0
;
$bbox
=
imagettfbbox
(
$font_size
,
$angle
,
$font_path
,
$text
);
$text_height
=
abs
(
$bbox
[
3
]
-
$bbox
[
5
]);
$text_width
=
abs
(
$bbox
[
0
]
-
$bbox
[
2
]);
return
array
(
"doesfit"
=>
(
$text_height
*
1.05
<=
imagesy
(
$img
)
/
2
&&
$text_width
*
1.05
<=
imagesx
(
$img
)),
"txtwidth"
=>
$text_width
,
"txtheight"
=>
$text_height
,
"imgwidth"
=>
imagesx
(
$img
),
"imgheight"
=>
imagesy
(
$img
),
);
}
private
function
saveImageDataInAnyFormat
(
$data
,
$preferred_mime
=
''
)
{
switch
(
$preferred_mime
)
{
case
'image/gif'
:
// GIF doesn't support true color.
case
'image/png'
:
if
(
function_exists
(
'imagepng'
))
{
ob_start
();
imagepng
(
$data
);
return
ob_get_clean
();
}
break
;
}
$img
=
null
;
if
(
function_exists
(
'imagejpeg'
))
{
ob_start
();
imagejpeg
(
$data
);
$img
=
ob_get_clean
();
}
else
if
(
function_exists
(
'imagepng'
))
{
ob_start
();
imagepng
(
$data
);
$img
=
ob_get_clean
();
}
else
if
(
function_exists
(
'imagegif'
))
{
ob_start
();
imagegif
(
$data
);
$img
=
ob_get_clean
();
}
else
{
throw
new
Exception
(
"No image generation functions exist!"
);
}
return
$img
;
}
}
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