C Specification
Comparison operators compare a reference and a test value, and return a true (“passed”) or false (“failed”) value depending on the comparison operator chosen. The supported operators are:
// Provided by VK_VERSION_1_0
typedef enum VkCompareOp {
VK_COMPARE_OP_NEVER = 0,
VK_COMPARE_OP_LESS = 1,
VK_COMPARE_OP_EQUAL = 2,
VK_COMPARE_OP_LESS_OR_EQUAL = 3,
VK_COMPARE_OP_GREATER = 4,
VK_COMPARE_OP_NOT_EQUAL = 5,
VK_COMPARE_OP_GREATER_OR_EQUAL = 6,
VK_COMPARE_OP_ALWAYS = 7,
} VkCompareOp;Description
-
VK_COMPARE_OP_NEVERspecifies that the comparison always evaluates false. -
VK_COMPARE_OP_LESSspecifies that the comparison evaluates reference < test. -
VK_COMPARE_OP_EQUALspecifies that the comparison evaluates reference = test. -
VK_COMPARE_OP_LESS_OR_EQUALspecifies that the comparison evaluates reference ≤ test. -
VK_COMPARE_OP_GREATERspecifies that the comparison evaluates reference > test. -
VK_COMPARE_OP_NOT_EQUALspecifies that the comparison evaluates reference ≠ test. -
VK_COMPARE_OP_GREATER_OR_EQUALspecifies that the comparison evaluates reference ≥ test. -
VK_COMPARE_OP_ALWAYSspecifies that the comparison always evaluates true.
Comparison operators are used for:
-
The Depth Compare Operation operator for a sampler, specified by VkSamplerCreateInfo::
compareOp. -
The stencil comparison operator for the stencil test, specified by vkCmdSetStencilOpEXT::
compareOpor VkStencilOpState::compareOp. -
The Depth Comparison operator for the depth test, specified by vkCmdSetDepthCompareOpEXT::
depthCompareOpor VkPipelineDepthStencilStateCreateInfo::depthCompareOp.
Each such use describes how the reference and test values for that comparison are determined.
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.