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 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.
Instead of loading a PDF from the resources folder I would like to load it from the documents directory. I have been trying to do this
This project is a generic C++ plugin with core-graphics support. I am unable to convert a PicHandle to CGImageRef successfully. Saving off image from CFDataRef results in a bad image.
I\'m reading PDF file, and then releasing it: CFURLRef pdfURL = CFBundleCopyResourceURL(CFBundleGetMainBundle(), (CFStringRef)@\"somepdf.pdf\", NULL, NULL);
I\'m using this sniplet to center strings that are drawn with CoreGraphics. I can\'t f开发者_StackOverflow中文版ind any documentation on the function CGContextGetTextDrawingMode(). It\'s obvious what
I am trying to render text to a shape that isn\'t a rectangle.The following code works when I add a rectangular path but not when I add an elliptical path.Ultimately, I\'d like to draw to any path (L
Does anyone know how to use core graphics to draw a pdf like in iBooks. I can already draw a pdf page using core graphics but was curious how iBooks shows a lower quality view of each page so it loads
On my iPhone app, I would need to draw a kind of full gauge with a dynamic indicator. I was thinking of using a gauge image (a .png, that I would draw in an external tool) without any indicator, and t
I am building an application that must add an overlay view once a scrollview is done zooming.I was having problems adding the overlay to the scrollview itself and keeping the position consistent, due
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