I want to draw an image using an additive blend mode. But I don\'t want to use OpenGL. I can\'t find anything to do this, maybe there\'s something in Quartz2D?
I\'m doing some graphics processing an开发者_如何学运维d I have a logic where in I have a bitmap with edges and I disregard all table edges from the letters E.g.
I want to temporarily distort the area under the mouse using a 开发者_运维百科CIBumpDistortion to increase the visibility of the mouse pointer.
Does anyone know what the limitations are on image size with custom CIFilters? I\'ve created a filter that performs as expected when the images are up to 2 mega pixels but then produce very strange re
My problem : the color of the fill in square go from black to full blue (255) with no transition color (darkest blue, dark blue, blue...). It seems that the CGContextSetRGBStroke is additive (WTF Oo)
I have c开发者_JAVA技巧reated a CALayer (I added several shapes to the layer, but ultimately, I have a single CALayer), and I am having a LOT of trouble adding it to a CGImage.I have found some refer
I currently have two UIViews: one of a red background and the other blue.The blue view is a subview of the red view.What I would like t开发者_运维知识库o do is be able to \"cut\" out rectangles on the
For the UIImage resize I used the following class. http://iphone.svn.wordpress.org/trunk/UIImage+Resize.m
I am drawing on a UIview several other subviews. Then in the DrawRect method of this UIView I am drawing a bezier curve.
I would like to add 3D or glossy look to s开发者_如何学Pythonome iPhone UIButtons, but do so without the use of PNGs or stretchable images.I have a lot of buttons of varying shapes and sizes with lots
加载中,请稍侯......