1  include::meta/VK_NV_scissor_exclusive.txt[]
 2  
 3  *Last Modified Date*::
 4      2018-07-31
 5  *IP Status*::
 6      No known IP claims.
 7  *Interactions and External Dependencies*::
 8      None
 9  *Contributors*::
10    - Pat Brown, NVIDIA
11    - Jeff Bolz, NVIDIA
12    - Piers Daniell, NVIDIA
13    - Daniel Koch, NVIDIA
14  
15  This extension adds support for an exclusive scissor test to Vulkan.
16  The exclusive scissor test behaves like the scissor test, except that the
17  exclusive scissor test fails for pixels inside the corresponding rectangle
18  and passes for pixels outside the rectangle.
19  If the same rectangle is used for both the scissor and exclusive scissor
20  tests, the exclusive scissor test will pass if and only if the scissor test
21  fails.
22  
23  === New Object Types
24  
25  None.
26  
27  === New Enum Constants
28  
29    * Extending elink:VkStructureType
30    ** ename:VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_EXCLUSIVE_SCISSOR_STATE_CREATE_INFO_NV
31    ** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXCLUSIVE_SCISSOR_FEATURES_NV
32    * Extending elink:VkDynamicState
33    ** ename:VK_DYNAMIC_STATE_EXCLUSIVE_SCISSOR_NV
34  
35  === New Enums
36  
37  None.
38  
39  === New Structures
40  
41    * slink:VkPhysicalDeviceExclusiveScissorFeaturesNV
42    * slink:VkPipelineViewportExclusiveScissorStateCreateInfoNV
43  
44  === New Functions
45  
46    * flink:vkCmdSetExclusiveScissorNV
47  
48  === New Built-In Variables
49  
50  None.
51  
52  === New SPIR-V Capabilities
53  
54  None.
55  
56  === Issues
57  
58  1) For the scissor test, the viewport state must be created with a matching
59     number of scissor and viewport rectangles.
60     Should we have the same requirement for exclusive scissors?
61  
62  *RESOLVED*: For exclusive scissors, we relax this requirement and allow an
63  exclusive scissor rectangle count that is either zero or equal to the number
64  of viewport rectangles.
65  If you pass in an exclusive scissor count of zero, the exclusive scissor
66  test is treated as disabled.
67  
68  === Version History
69  
70    * Revision 1, 2018-07-31 (Pat Brown)
71      - Internal revisions