Что такое код imagecolorclosestalpha

imagecolorclosestalpha

Get the index of the closest color to the specified color + alpha ( PHP 4 >= 4.0.6, PHP 5 )

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Parameters

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

Value of red component

Value of green component

Value of blue component

A value between 0 and 127 . 0 indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Return Values

Returns the index of the closest color in the palette.

Notes

This function requires GD 2.0.1 or later (2.0.28 or later is recommended).

Imagecolorclosestalpha

Php функции


Php скрипты


imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

Description

int imagecolorclosestalpha ( resource image, int red, int green, int blue, int alpha )

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Замечание: Эта функция нуждается в GD версии 2.0.1 или выше.

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Что такое код imagecolorclosestalpha

imagecolorclosestalpha — получает индекс цвета, ближайшего к специфицированному, + alpha.

Описание

int imagecolorclosestalpha (resource image, int red, int green, int blue, int alpha)

Возвращает индекс цвета палитры изображения, «ближайшего» к специфицированному RGB-значению, и уровень alpha .

Примечание: эта функция была введена в PHP 4.0.6 и требует GD 2.0.1.


Назад Оглавление Вперёд
imagecolorclosest Вверх imagecolorclosesthwb

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imagecolorclosestalpha

Руководство по PHP
Пред. След.

imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

Description

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Замечание: Эта функция нуждается в GD версии 2.0.1 или выше.

imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

Description

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Parameters

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

Value of red component.

Value of green component.

Value of blue component.

A value between and 127. indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Return Values

Returns the index of the closest color in the palette.

Examples

Example #1 Search for a set of colors in an image

// Start with an image and convert it to a palette-based image
$im = imagecreatefrompng ( ‘figures/imagecolorclosest.png’ );
imagetruecolortopalette ( $im , false , 255 );

// Search colors (RGB)
$colors = array(
array( 254 , 145 , 154 , 50 ),
array( 153 , 145 , 188 , 127 ),
array( 153 , 90 , 145 , 0 ),
array( 255 , 137 , 92 , 84 )
);

// Loop through each search and find the closest color in the palette.
// Return the search number, the search RGB and the converted RGB match
foreach( $colors as $id => $rgb )
<
$result = imagecolorclosestalpha ( $im , $rgb [ 0 ], $rgb [ 1 ], $rgb [ 2 ], $rgb [ 3 ]);
$result = imagecolorsforindex ( $im , $result );
$result = «( < $result [ 'red' ]>, < $result [ 'green' ]>, < $result [ 'blue' ]>, < $result [ 'alpha' ]>)» ;

echo «# $id : Search ( $rgb [ 0 ] , $rgb [ 1 ] , $rgb [ 2 ] , $rgb [ 3 ] ); Closest match: $result .\n» ;
>

The above example will output something similar to:

imagecolorclosestalpha

Get the index of the closest color to the specified color + alpha ( PHP 4 >= 4.0.6, PHP 5 )

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Parameters

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

Value of red component

Value of green component

Value of blue component

A value between 0 and 127 . 0 indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Return Values

Returns the index of the closest color in the palette.

Notes

This function requires GD 2.0.1 or later (2.0.28 or later is recommended).

imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

Description

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Parameters

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor() .

Value of red component.

Value of green component.

Value of blue component.

A value between and 127. indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Return Values

Returns the index of the closest color in the palette.

Examples

Example #1 Search for a set of colors in an image

// Start with an image and convert it to a palette-based image
$im = imagecreatefrompng ( ‘figures/imagecolorclosest.png’ );
imagetruecolortopalette ( $im , false , 255 );

// Search colors (RGB)
$colors = array(
array( 254 , 145 , 154 , 50 ),
array( 153 , 145 , 188 , 127 ),
array( 153 , 90 , 145 , 0 ),
array( 255 , 137 , 92 , 84 )
);

// Loop through each search and find the closest color in the palette.
// Return the search number, the search RGB and the converted RGB match
foreach( $colors as $id => $rgb )
<
$result = imagecolorclosestalpha ( $im , $rgb [ 0 ], $rgb [ 1 ], $rgb [ 2 ], $rgb [ 3 ]);
$result = imagecolorsforindex ( $im , $result );
$result = «( < $result [ 'red' ]>, < $result [ 'green' ]>, < $result [ 'blue' ]>, < $result [ 'alpha' ]>)» ;

echo «# $id : Search ( $rgb [ 0 ] , $rgb [ 1 ] , $rgb [ 2 ] , $rgb [ 3 ] ); Closest match: $result .\n» ;
>

The above example will output something similar to:

imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

Description

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Parameters

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor() .

Value of red component.

Value of green component.

Value of blue component.

A value between and 127. indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Return Values

Returns the index of the closest color in the palette.

Examples

Example #1 Search for a set of colors in an image

// Start with an image and convert it to a palette-based image
$im = imagecreatefrompng ( ‘figures/imagecolorclosest.png’ );
imagetruecolortopalette ( $im , false , 255 );

// Search colors (RGB)
$colors = array(
array( 254 , 145 , 154 , 50 ),
array( 153 , 145 , 188 , 127 ),
array( 153 , 90 , 145 , 0 ),
array( 255 , 137 , 92 , 84 )
);

// Loop through each search and find the closest color in the palette.
// Return the search number, the search RGB and the converted RGB match
foreach( $colors as $id => $rgb )
<
$result = imagecolorclosestalpha ( $im , $rgb [ 0 ], $rgb [ 1 ], $rgb [ 2 ], $rgb [ 3 ]);
$result = imagecolorsforindex ( $im , $result );
$result = «( < $result [ 'red' ]>, < $result [ 'green' ]>, < $result [ 'blue' ]>, < $result [ 'alpha' ]>)» ;

echo «# $id : Search ( $rgb [ 0 ] , $rgb [ 1 ] , $rgb [ 2 ] , $rgb [ 3 ] ); Closest match: $result .\n» ;
>

The above example will output something similar to:

Что такое код imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

Description int imagecolorclosestalpha ( resource image, int red, int green, int blue, int alpha )

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Note: This function requires GD 2.0.1 or later.

imagecolorclosestalpha

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

imagecolorclosestalpha — Get the index of the closest color to the specified color + alpha

Description

Returns the index of the color in the palette of the image which is «closest» to the specified RGB value and alpha level.

Parameters

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor() .

Value of red component.

Value of green component.

Value of blue component.

A value between and 127. indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Return Values

Returns the index of the closest color in the palette.

Examples

Example #1 Search for a set of colors in an image

// Start with an image and convert it to a palette-based image
$im = imagecreatefrompng ( ‘figures/imagecolorclosest.png’ );
imagetruecolortopalette ( $im , false , 255 );

// Search colors (RGB)
$colors = array(
array( 254 , 145 , 154 , 50 ),
array( 153 , 145 , 188 , 127 ),
array( 153 , 90 , 145 , 0 ),
array( 255 , 137 , 92 , 84 )
);

// Loop through each search and find the closest color in the palette.
// Return the search number, the search RGB and the converted RGB match
foreach( $colors as $id => $rgb )
<
$result = imagecolorclosestalpha ( $im , $rgb [ 0 ], $rgb [ 1 ], $rgb [ 2 ], $rgb [ 3 ]);
$result = imagecolorsforindex ( $im , $result );
$result = «( < $result [ 'red' ]>, < $result [ 'green' ]>, < $result [ 'blue' ]>, < $result [ 'alpha' ]>)» ;

echo «# $id : Search ( $rgb [ 0 ] , $rgb [ 1 ] , $rgb [ 2 ] , $rgb [ 3 ] ); Closest match: $result .\n» ;
>

The above example will output something similar to:

Илон Маск рекомендует:  Что такое код pdf_setcolor
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