Quartz 2D Programming Guide

最新推荐文章于 2024-06-09 15:30:00 发布

原创最新推荐文章于 2024-06-09 15:30:00 发布 · 190 阅读

0 ·

CC 4.0 BY-SA版权

本文深入探讨了Quartz2D中的关键图形技术，包括路径、图像、层、图案、渐变、颜色和颜色空间等核心概念，并介绍了如何在iOS应用中高效地进行图形渲染。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

一.相关的类(个人感觉必须要熟悉的)

CGPathRef,CGImageRef,CGLayerRef,CGPatternRef,CGShadingRef,CGGradientRef

其它

CGFunctionRef, used to define callback functions that take an arbitrary number of floating-point arguments. You use this data type when you create gradients for a shading. See “Gradients.”
CGColorRef and CGColorSpaceRef, used to inform Quartz how to interpret color. See “Color and Color Spaces.”
CGImageSourceRef and CGImageDestinationRef, which you use to move data into and out of Quartz. See “Data Management in Quartz 2D” and Image I/O Programming Guide.
CGFontRef, used to draw text. See “Text.”
CGPDFDictionaryRef, CGPDFObjectRef, CGPDFPageRef, CGPDFStream, CGPDFStringRef, and CGPDFArrayRef, which provide access to PDF metadata. See “PDF Document Creation, Viewing, and Transforming.”
CGPDFScannerRef and CGPDFContentStreamRef, which parse PDF metadata. See “PDF Document Parsing.”
CGPSConverterRef, used to convert PostScript to PDF. It is not available in iOS. See “PostScript Conversion.”

二.Graphics State

CGContextSaveGState &