VkFragmentShadingRateNV

If the fragmentShadingRateEnums feature is enabled, fragment shading rates may be specified using the VkFragmentShadingRateNV enumerated type defined as:

typedef enum VkFragmentShadingRateNV {
    VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_PIXEL_NV = 0,
    VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_1X2_PIXELS_NV = 1,
    VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X1_PIXELS_NV = 4,
    VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X2_PIXELS_NV = 5,
    VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X4_PIXELS_NV = 6,
    VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X2_PIXELS_NV = 9,
    VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X4_PIXELS_NV = 10,
    VK_FRAGMENT_SHADING_RATE_2_INVOCATIONS_PER_PIXEL_NV = 11,
    VK_FRAGMENT_SHADING_RATE_4_INVOCATIONS_PER_PIXEL_NV = 12,
    VK_FRAGMENT_SHADING_RATE_8_INVOCATIONS_PER_PIXEL_NV = 13,
    VK_FRAGMENT_SHADING_RATE_16_INVOCATIONS_PER_PIXEL_NV = 14,
    VK_FRAGMENT_SHADING_RATE_NO_INVOCATIONS_NV = 15,
} VkFragmentShadingRateNV;

• VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_PIXEL_NV specifies a fragment size of 1x1 pixels.
• VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_1X2_PIXELS_NV specifies a fragment size of 1x2 pixels.
• VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X1_PIXELS_NV specifies a fragment size of 2x1 pixels.
• VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X2_PIXELS_NV specifies a fragment size of 2x2 pixels.
• VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X4_PIXELS_NV specifies a fragment size of 2x4 pixels.
• VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X2_PIXELS_NV specifies a fragment size of 4x2 pixels.
• VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X4_PIXELS_NV specifies a fragment size of 4x4 pixels.
• VK_FRAGMENT_SHADING_RATE_2_INVOCATIONS_PER_PIXEL_NV specifies a fragment size of 1x1 pixels, with two fragment shader invocations per fragment.
• VK_FRAGMENT_SHADING_RATE_4_INVOCATIONS_PER_PIXEL_NV specifies a fragment size of 1x1 pixels, with four fragment shader invocations per fragment.
• VK_FRAGMENT_SHADING_RATE_8_INVOCATIONS_PER_PIXEL_NV specifies a fragment size of 1x1 pixels, with eight fragment shader invocations per fragment.
• VK_FRAGMENT_SHADING_RATE_16_INVOCATIONS_PER_PIXEL_NV specifies a fragment size of 1x1 pixels, with sixteen fragment shader invocations per fragment.
• VK_FRAGMENT_SHADING_RATE_NO_INVOCATIONS_NV specifies that any portions of a primitive that use that shading rate should be discarded without invoking any fragment shader.

To use the shading rates VK_FRAGMENT_SHADING_RATE_2_INVOCATIONS_PER_PIXEL_NV, VK_FRAGMENT_SHADING_RATE_4_INVOCATIONS_PER_PIXEL_NV, VK_FRAGMENT_SHADING_RATE_8_INVOCATIONS_PER_PIXEL_NV, and VK_FRAGMENT_SHADING_RATE_16_INVOCATIONS_PER_PIXEL_NV as a pipeline, primitive, or attachment shading rate, the supersampleFragmentShadingRates feature must be enabled. To use the shading rate VK_FRAGMENT_SHADING_RATE_NO_INVOCATIONS_NV as a pipeline, primitive, or attachment shading rate, the noInvocationFragmentShadingRates feature must be enabled.