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DATE: Nov. 25, 2014, 7:16 a.m.

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  1. /* CoreGraphics - CGLayer.h
  2. * Copyright (c) 2004-2008 Apple Inc.
  3. * All rights reserved. */
  5. #ifndef CGLAYER_H_
  6. #define CGLAYER_H_
  8. typedef struct CGLayer *CGLayerRef;
  10. #include <CoreGraphics/CGBase.h>
  11. #include <CoreGraphics/CGContext.h>
  13. CF_IMPLICIT_BRIDGING_ENABLED
  15. /* Create a layer of size `size' relative to the context `context'. The
  16. value of `size' is specified in default user space (base space) units.
  17. The parameter `auxiliaryInfo' should be NULL; it is reserved for future
  18. expansion. */
  20. CG_EXTERN CGLayerRef CGLayerCreateWithContext(CGContextRef context,
  21. CGSize size, CFDictionaryRef auxiliaryInfo)
  22. CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  24. /* Equivalent to `CFRetain(layer)', except it doesn't crash (as CFRetain
  25. does) if `layer' is NULL. */
  27. CG_EXTERN CGLayerRef CGLayerRetain(CGLayerRef layer)
  28. CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  30. /* Equivalent to `CFRelease(layer)', except it doesn't crash (as CFRelease
  31. does) if `layer' is NULL. */
  33. CG_EXTERN void CGLayerRelease(CGLayerRef layer)
  34. CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  36. /* Return the size of the layer `layer'. */
  38. CG_EXTERN CGSize CGLayerGetSize(CGLayerRef layer)
  39. CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  41. /* Return the context of `layer'. */
  43. CG_EXTERN CGContextRef CGLayerGetContext(CGLayerRef layer)
  44. CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  46. /* Draw the contents of `layer' into `rect' of `context'. The contents are
  47. scaled, if necessary, to fit into `rect'; the rectangle `rect' is in user
  48. space. */
  50. CG_EXTERN void CGContextDrawLayerInRect(CGContextRef context, CGRect rect,
  51. CGLayerRef layer) CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  53. /* Draw the contents of `layer' at `point' in `context'. This is equivalent
  54. to calling "CGContextDrawLayerInRect" with a rectangle having origin at
  55. `point' and size equal to the size of `layer'. */
  57. CG_EXTERN void CGContextDrawLayerAtPoint(CGContextRef context, CGPoint point,
  58. CGLayerRef layer) CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  60. /* Return the CFTypeID for CGLayerRefs. */
  62. CG_EXTERN CFTypeID CGLayerGetTypeID(void)
  63. CG_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
  65. CF_IMPLICIT_BRIDGING_DISABLED
  67. #endif /* CGLAYER_H_ */
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