CGContextDrawImage is available in OSX and iOS which helps to draws an image into a graphics context.
Does anyone know why CGContextDrawImage would be drawing my image upside down? I am loading an image in from my …
ios cocoa-touch core-graphics cgcontextdrawimageIt seems that CGContextDrawImage(CGContextRef, CGRect, CGImageRef) performs MUCH WORSE when drawing a CGImage that was created by CoreGraphics (i.…
ios performance core-graphics cgcontextdrawimageHow can I rotate an image drawn by CGContextDrawImage() at its center? In drawRect: CGContextSaveGState(c); rect = CGRectOffset(rect, -rect.…
ios core-graphics cgcontext cgaffinetransform cgcontextdrawimageI need some help using the CGContextDrawImage. I have the following code which will create a Bitmap context and convert …
quartz-2d cgcontextdrawimageI have an UIImage extension that uses CGContextDrawImage. It simply rotate a UIImage. I updated to Xcode8 and Swift3 and …
ios swift swift3 cgcontextdrawimage