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2014/10/15 ¤U¤È 10:12:27
iphone Programming Glossary: paintingDraw lines with Glow effect smoothly in iPad http://stackoverflow.com/questions/13174862/draw-lines-with-glow-effect-smoothly-in-ipad which does all the drawing for you you need to set the color of your stroke stroke color means the color with which painting will be done on screen. on screen and also the blend mode. You can try different blend mode and see the result. void drawRect..
Improving Finger Painting Performance http://stackoverflow.com/questions/1355527/improving-finger-painting-performance Graphics on top UIView. In this manner I can accumulate graphics on the underlying UIView while maintaining responsive painting of the temporary graphics on the top UIView. Sidenote Each Drawing is simply an NSArray of custom Point Objects which are..
How would I implement undo in an OpenGL ES painting application on the iPhone? http://stackoverflow.com/questions/3474252/how-would-i-implement-undo-in-an-opengl-es-painting-application-on-the-iphone would I implement undo in an OpenGL ES painting application on the iPhone I'm using Apple's sample application GLPaint as a basis for an OpenGL ES painting application.. OpenGL ES painting application on the iPhone I'm using Apple's sample application GLPaint as a basis for an OpenGL ES painting application but I can't figure out how to implement undo functionality within it. I don't want to take images of every stroke..
want to add manual erasing option in ipad painting application by quartz http://stackoverflow.com/questions/3863931/want-to-add-manual-erasing-option-in-ipad-painting-application-by-quartz to add manual erasing option in ipad painting application by quartz i am working on a painting application using Quartz 2D for ipad. now i want to add an eraser option.. to add manual erasing option in ipad painting application by quartz i am working on a painting application using Quartz 2D for ipad. now i want to add an eraser option so that user can manually erase portion of his..
http://stackoverflow.com/questions/4048811/erase-using-brush-in-glpaint I am trying to add erase functionality where user could select an eraser button and erase the painted area just as painting. I am trying have a conditional statement within renderLineFromPoint CGPoint start toPoint CGPoint end method so that I.. within renderLineFromPoint CGPoint start toPoint CGPoint end method so that I could check whether the stroke is for painting or erasing. For erasing I do not know how to make use of the start and end parameters for erasing. Is there any method call..
Drawing app on iPad using OpenGL http://stackoverflow.com/questions/4606680/drawing-app-on-ipad-using-opengl a look at Apple's example GLPaint and my app is now based on that code. My app should be just for drawing text not for painting pictures. Well my App works I can write some text. But the writing isn't really good it doesn't make fun to write. The drawing..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now to the original question.............................................. In a word you can A background the large painting and call to the foreground for UI updates or B arguably controversially there are four 'immediate' methods suggested that.. commit #endif #ifdef DDLONG self setNeedsDisplay self layer displayIfNeeded #endif #ifdef BACKGROUNDMETHOD here the painting is being done in the bg we have been called here in the foreground to inval self setNeedsDisplay #endif You can see for..
Mysterious “progressive slowing” problem in run loop / drawRect http://stackoverflow.com/questions/4786754/mysterious-progressive-slowing-problem-in-run-loop-drawrect sample code. Here is my take on a possible answer The issue I see is the following. CGLayer are great for repeatedly painting because they cache their rendering into a flat image. The cache is invalidated when additional operations are appended to.. in the PaintView. Instead of invalidating the complete view invalidate only the the CGRect that really needs repainting. This as I understand it is the solution proposed by @v01d. Flatten the layer. Instead of holding a single CGLayer copy..
Performing iPhone optimization on externally downloaded PNGs http://stackoverflow.com/questions/640909/performing-iphone-optimization-on-externally-downloaded-pngs pngs.html Also the performance I'm referring to isn't the downloading but the rendering. I superimpose custom painting on top of the image overriding the drawRect method of the UIView and it's very choppy when the background is the downloaded..
Blur Effect (Wet in Wet effect) in Paint Application Using OpenGL-ES http://stackoverflow.com/questions/6980402/blur-effect-wet-in-wet-effect-in-paint-application-using-opengl-es am developing Paint application using OpenGL ES for iPhone and i want to implement Gaussian blur effect Wet in Wet for painting. Please have look at the image describing my requirement for Blur effect I tried to search how for OpenGL function but did..
Filling a portion of an image with color http://stackoverflow.com/questions/8124308/filling-a-portion-of-an-image-with-color a portion of an image with color I'm doing an IPhone painting app. I would like to paint a particular portion of an image using touchevent to find the pixel data and then use that pixel..
http://stackoverflow.com/questions/946700/glpaint-save-image save image I'm trying to develop a complex painting application on the iPhone. I'm currently drawing using Quartz e.g. CGContext ... . Unfortunately the Quartz overhead is..
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