cgcontext
CGContext line drawing: CGContextFillPath not working?
Anyone have any idea why CGContextFillPath won\'t work in the code snippet below? I\'m using the following code to draw to a UIImageView. It\'s stroking the path correctly, but ignoring CGContextFillP[详细]
2023-01-17 16:11 分类:问答incorrect position when draw image context into UIImage that has been scale to another size;
my uiimage has been add to UIView, then i transform it to scale 1.5 when i try to draw image context it will present incorrect position[详细]
2023-01-17 01:22 分类:问答Multiplying RGBA with two CGImageRefs
I\'d like to multiply r, g, b and a values of two CGImages, to use a single image as both a mask (in its alpha channel) and tint (in the rgb channels). I first tried simply:[详细]
2023-01-16 15:07 分类:问答error when trying to undo Context
i try to undo myContext from save state then after i draw the line i call undo method to restore my context to previous but it report error[详细]
2023-01-15 08:15 分类:问答CGContext & CGBitmapContextCreateImage errors, how to fix?
I\'ve been at this for hours now, and don\'t even know how to debug this error. Maybe there\'s an SO expert who knows what\'s going on.[详细]
2023-01-14 09:33 分类:问答iPhone MapKit: Custom MKPolygonView with image draws upside down
does anybody know what to do with this problem: my image in a custom MKPolygonView is flipped upside down?[详细]
2023-01-13 23:09 分类:问答transparency/alpha in CoreGraphics context (iphone, objc)
I am currently making a basic image editor for iphone. I take the CGImageRef from a UIIma开发者_如何学运维ge and create a context for it using the following code[详细]
2023-01-13 19:29 分类:问答How do i print a image in images tiles in Cocoa printing
I hadCarbon code which prints image as tiles in . But now for 64 bit i want to change that into carbon.[详细]
2023-01-12 05:26 分类:问答iOS4: how do you set a CGContext's transormation matrix to an absolute number?
I\'m currently making a graphical application, and it will make my life a lot easier if I simply flip the context\'s transform matrix upside down whenever I want to draw something upside down, which i[详细]
2023-01-11 06:04 分类:问答Can I obtain a valid CGContext for drawing with just a @synthesize UIView dropped into a view controller view
Thank you in advance for any help, I am building a multipage iPad app,and each page has specialized calculations, they all work great, but i would like to make the user experience better with some sim[详细]
2023-01-11 01:38 分类:问答