PointSize
PointSize
Decorating a variable with the PointSize built-in decoration will make
that variable contain the size of point primitives
or the final rasterization of polygons if polygon
mode is VK_POLYGON_MODE_POINT when
VkPhysicalDeviceMaintenance5PropertiesKHR::polygonModePointSize
is set to VK_TRUE
.
The value written to the variable decorated with PointSize by the last
pre-rasterization shader
stage in the pipeline is used as the framebuffer-space size of points
produced by rasterization.
If maintenance5 is enabled and a value is
not written to a variable decorated with PointSize, a value of 1.0 is
used as the size of points.
When PointSize decorates a variable in the Input Storage Class,
it contains the data written to the output variable decorated with
PointSize from the previous shader stage.
Valid Usage
VUID-PointSize-PointSize-04314
The PointSize decoration must be used only within the
MeshEXT, MeshNV, Vertex, TessellationControl,
TessellationEvaluation, or Geometry Execution Model
VUID-PointSize-PointSize-04315
The variable decorated with PointSize within the MeshEXT,
MeshNV, or Vertex Execution Model must be declared using the
Output Storage Class
VUID-PointSize-PointSize-04316
The variable decorated with PointSize within the
TessellationControl, TessellationEvaluation, or Geometry
Execution Model must not be declared using a Storage Class other than
Input or Output
VUID-PointSize-PointSize-04317
The variable decorated with PointSize must be declared as a scalar
32-bit floating-point value