It\'s possible to access the alpha channel of a given bitmap with extractAlpha(), but I haven\'t been able to find any way to actually set the alpha channel of a bitmap.
i have an image processing application that is able to getpixel, anyone know how can i hide or show the RGB channel of my image? For ex开发者_如何学编程ample when i click a button call \"RED\" it will
Is there a way I can determine if an HDC uses alpha chan开发者_JS百科nel? I read Question 333559 and Question 685684, but their questions are about BITMAP. Apparently, some HDC has alpha channel (thou
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