add quality_truecolor parameter #65
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This is amazing. Can you do the same for all other image types too? I think JPG and GIF will benefit from same improvements. |
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JPG is always truecolor, and GIF is palette-based. PS. Although the GIF format is almost never used for True Color images, it is possible to do so. But imagegif() uses GIF87a/GIF89a format, which allow only 256 colors (8-bit palette). Truecolor is 24-bit. |
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Added new optional quality parameter, that allows to significantly reduce png file size.
By default this library converts palettized png files into truecolor images.
You can set $quality_truecolor to "false" to avoid convertation.
NOTE: palettized images have lesser quality! Because of this and for BC default value for $quality_truecolor is "true".
Test results for ~20000 images with different sizes and palettes:
Original folder size: 2GB
Resized folder without new parameter: 9,3GB (0 compression), 4GB (7 compression)
Resized folder with new parameter: 3,2GB (0 compression), 1,5GB (7 compression)