added parameter "rmalpha"

cubicdaiya / ngx_small_light

Dynamic Image Transformation Module For nginx.

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added parameter "rmalpha" #100

Open harloprillar opened 4 years ago

harloprillar commented 4 years ago

Converting PNG with transparent alpha channel to JPEG results to image with black background no metter what background (canvas) color is defined. This PR allows to remove alpha channel from resulting image making possible to set background color while converting to JPEG.