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… | |
| 749 | =head2 COLOUR MODIFICATIONS |
749 | =head2 COLOUR MODIFICATIONS |
| 750 | |
750 | |
| 751 | The following operators change the pixels of the image. |
751 | The following operators change the pixels of the image. |
| 752 | |
752 | |
| 753 | =over 4 |
753 | =over 4 |
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754 | |
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755 | =item tint $color, $img |
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756 | |
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757 | Tints the image in the given colour. |
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758 | |
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759 | Example: tint the image red. |
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760 | |
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761 | tint "red", load "rgb.png" |
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762 | |
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763 | Example: the same, but specify the colour by component. |
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764 | |
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765 | tint [1, 0, 0], load "rgb.png" |
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766 | |
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767 | =cut |
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768 | |
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769 | sub tint($$) { |
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770 | $_[1]->tint ($_[0]) |
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771 | } |
| 754 | |
772 | |
| 755 | =item contrast $factor, $img |
773 | =item contrast $factor, $img |
| 756 | |
774 | |
| 757 | =item contrast $r, $g, $b, $img |
775 | =item contrast $r, $g, $b, $img |
| 758 | |
776 | |
