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Questions - quartz-2d

CGGradientCreateWithColors / CGContextDrawLinearGradient - formula to calculate intermediate colour combinations?

Does anyone know the formula used by CGGradientCreateWithColors to calculate the intermediate colours at each point along the gradient? I want to reproduce the colour for a given point - e.g. with CGG...
test-img

djmlewis

swift

objective-c

core-graphics

quartz-2d

Votes: 0

Answers: 1

Latest Answer

Larme's formula does the trick for me, where the proportion of the second colour (colour at location 1.0 in CGGradientCreateWithColors) that you want expressed (i.e. the "distance" between c...
test-img

djmlewis

Significance of kCGImageAlphaPremultipliedLast and kCGBitmapByteOrder32Big in core graphics

I am converting pdf's to images and displaying in ios using quartz 2d api's. The bitmap image width and height will be arbitrary and will not necessarily match the PDF's dimensions. While most PDF's...
test-img

Muthukumar

ios

xcode

core-graphics

quartz-2d

Votes: 0

Answers: 0

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