C Specification
Multisample values in a multisample attachment are combined according to the resolve mode used:
// Provided by VK_VERSION_1_2
typedef enum VkResolveModeFlagBits {
VK_RESOLVE_MODE_NONE = 0,
VK_RESOLVE_MODE_SAMPLE_ZERO_BIT = 0x00000001,
VK_RESOLVE_MODE_AVERAGE_BIT = 0x00000002,
VK_RESOLVE_MODE_MIN_BIT = 0x00000004,
VK_RESOLVE_MODE_MAX_BIT = 0x00000008,
// Provided by VK_KHR_dynamic_rendering with VK_ANDROID_external_format_resolve
VK_RESOLVE_MODE_EXTERNAL_FORMAT_DOWNSAMPLE_ANDROID = 0x00000010,
// Provided by VK_KHR_depth_stencil_resolve
VK_RESOLVE_MODE_NONE_KHR = VK_RESOLVE_MODE_NONE,
// Provided by VK_KHR_depth_stencil_resolve
VK_RESOLVE_MODE_SAMPLE_ZERO_BIT_KHR = VK_RESOLVE_MODE_SAMPLE_ZERO_BIT,
// Provided by VK_KHR_depth_stencil_resolve
VK_RESOLVE_MODE_AVERAGE_BIT_KHR = VK_RESOLVE_MODE_AVERAGE_BIT,
// Provided by VK_KHR_depth_stencil_resolve
VK_RESOLVE_MODE_MIN_BIT_KHR = VK_RESOLVE_MODE_MIN_BIT,
// Provided by VK_KHR_depth_stencil_resolve
VK_RESOLVE_MODE_MAX_BIT_KHR = VK_RESOLVE_MODE_MAX_BIT,
} VkResolveModeFlagBits;
or the equivalent
// Provided by VK_KHR_depth_stencil_resolve
typedef VkResolveModeFlagBits VkResolveModeFlagBitsKHR;
Description
-
VK_RESOLVE_MODE_NONE
indicates that no resolve operation is done. -
VK_RESOLVE_MODE_SAMPLE_ZERO_BIT
indicates that result of the resolve operation is equal to the value of sample 0. -
VK_RESOLVE_MODE_AVERAGE_BIT
indicates that result of the resolve operation is the average of the sample values. -
VK_RESOLVE_MODE_MIN_BIT
indicates that result of the resolve operation is the minimum of the sample values. -
VK_RESOLVE_MODE_MAX_BIT
indicates that result of the resolve operation is the maximum of the sample values. -
VK_RESOLVE_MODE_EXTERNAL_FORMAT_DOWNSAMPLE_ANDROID
indicates that rather than a multisample resolve, a single sampled color attachment will be downsampled into a Y′CBCR format image specified by an external Android format. Unlike other resolve modes, implementations can resolve multiple times during rendering, or even bypass writing to the color attachment altogether, as long as the final value is resolved to the resolve attachment. Values in the G, B, and R channels of the color attachment will be written to the Y, CB, and CR channels of the external format image, respectively. Chroma values are calculated as if sampling with a linear filter from the color attachment at full rate, at the location the chroma values sit according to VkPhysicalDeviceExternalFormatResolvePropertiesANDROID::chromaOffsetX
, VkPhysicalDeviceExternalFormatResolvePropertiesANDROID::chromaOffsetY
, and the chroma sample rate of the resolved image.
If no resolve mode is otherwise specified, VK_RESOLVE_MODE_AVERAGE_BIT
is used.
Note
No range compression or Y′CBCR model conversion is performed by
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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.