35 lines
1.9 KiB
PHP
35 lines
1.9 KiB
PHP
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<?php
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function fastImageCopyResampled(&$dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h, $quality = 4) {
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###
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# Plug-and-Play fastImageCopyResampled function replaces much slower imagecopyresampled.
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# Just include this function and change all "imagecopyresampled" references to "fastImageCopyResampled".
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# Typically from 30 to 60 times faster when reducing high resolution images down to thumbnail size using the default quality setting.
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# Author: Tim Eckel - Date: 09/07/07 - Version: 1.1 - Project: FreeRingers.net - Freely distributable - These comments must remain.
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#
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# Optional "quality" parameter (defaults is 3). Fractional values are allowed, for example 1.5. Must be greater than zero.
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# Between 0 and 1 = Fast, but mosaic results, closer to 0 increases the mosaic effect.
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# 1 = Up to 350 times faster. Poor results, looks very similar to imagecopyresized.
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# 2 = Up to 95 times faster. Images appear a little sharp, some prefer this over a quality of 3.
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# 3 = Up to 60 times faster. Will give high quality smooth results very close to imagecopyresampled, just faster.
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# 4 = Up to 25 times faster. Almost identical to imagecopyresampled for most images.
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# 5 = No speedup. Just uses imagecopyresampled, no advantage over imagecopyresampled.
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###
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if (empty($src_image) || empty($dst_image) || $quality <= 0) { return false; }
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if ($quality < 5 && (($dst_w * $quality) < $src_w || ($dst_h * $quality) < $src_h)) {
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$temp = imagecreatetruecolor($dst_w * $quality + 1, $dst_h * $quality + 1);
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imagecopyresized($temp, $src_image, 0, 0, $src_x, $src_y, $dst_w * $quality + 1, $dst_h * $quality + 1, $src_w, $src_h);
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imagecopyresampled($dst_image, $temp, $dst_x, $dst_y, 0, 0, $dst_w, $dst_h, $dst_w * $quality, $dst_h * $quality);
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imagedestroy($temp);
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} else imagecopyresampled($dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
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return true;
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}
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?>
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