CalculationTrait
Calculation trait.
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Table of Contents
Methods
- calculateCounterClockwise() : int
- Calculate counter clockwise degree.
- calculateStartXOfCenter() : int
- Calculate startX position of center.
- calculateWatermarkImageStartXY() : array<string|int, mixed>
- Calculate watermark start X and Y from specified text position (left, right, bottom, top, middle, center).
- convertAlpha127ToRgba() : string
- Convert alpha number (0 - 127) to rgba value (1.00 - 0.00).
Methods
calculateCounterClockwise()
Calculate counter clockwise degree.
protected
calculateCounterClockwise(int $value) : int
Calculate input degree for use with Imagick.
In GD 90 degrees is 270 in Imagick. This function help to make it working together very well.
So it will be...
input = output
0 = 0
1 = 359
10 = 350
90 = 270
180 = 180
270 = 90
360 = 0
Parameters
- $value : int
-
Input degrees.
Return values
int —Return opposite degrees for use with Imagick.
calculateStartXOfCenter()
Calculate startX position of center.
protected
calculateStartXOfCenter(int $objWidth, int $canvasWidth) : int
With this method, you can calculate the start x position of center (horizontal) or middle (vertical).
The purpose of this method is for internal use, do not call this method from image's driver class directly due to it can be changed in the future.
Formular: round((half of canvas) - (half of object))
Parameters
- $objWidth : int
-
Destination image object size.
- $canvasWidth : int
-
Canvas size.
Return values
int —Calculated size.
calculateWatermarkImageStartXY()
Calculate watermark start X and Y from specified text position (left, right, bottom, top, middle, center).
protected
calculateWatermarkImageStartXY(string $wmStartX, string $wmStartY, int $imgWidth, int $imgHeight, int $wmWidth, int $wmHeight[, array<string|int, mixed> $options = [] ]) : array<string|int, mixed>
The purpose of this method is for internal use, do not call this method from image's driver class directly due to it can be changed in the future.
Parameters
- $wmStartX : string
-
Position to begin in x axis. The value is 'left', 'center', 'right'.
- $wmStartY : string
-
Position to begin in y axis. The value is 'top', 'middle', 'bottom'.
- $imgWidth : int
-
Latest image width. Get the dimension from latest modified image only.
- $imgHeight : int
-
Latest image height. Get the dimension from latest modified image only.
- $wmWidth : int
-
Latest watermark image width. Get the dimension from latest modified image only.
- $wmHeight : int
-
Latest watermark image height. Get the dimension from latest modified image only.
- $options : array<string|int, mixed> = []
-
The watermark options. This argument must be normalized before calling this method. Value is associative array.
padding(int) Padding around watermark object. Use with left, right, bottom, top but not middle, center.
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Return values
array<string|int, mixed> —Return array with width as index 0, height as index 1.
convertAlpha127ToRgba()
Convert alpha number (0 - 127) to rgba value (1.00 - 0.00).
protected
convertAlpha127ToRgba(int $number) : string
The purpose of this method is for internal use, do not call this method from image's driver class directly due to it can be changed in the future.
Parameters
- $number : int
-
Alpha number (0 to 127). 127 is completely transparent.
Return values
string —Return RGBA value (1.00 to 0.00). 0.00 is completely transparent.