Description
FragCoord-
Decorating a variable with the
FragCoordbuilt-in decoration will make that variable contain the coordinates (x,y,z,1/w) of the fragment being processed.The (x,y) values are the framebuffer coordinates (xf,yf) of the fragment.
When Sample Shading is enabled, the x and y components of
FragCoordreflect the location of one of the samples corresponding to the shader invocation.Otherwise, the x and y components of
FragCoordreflect the location of the center of the fragment.The z component of
FragCoordis the interpolated depth value of the primitive.The w component is the interpolated .
The
Centroidinterpolation decoration is ignored, but allowed, onFragCoord.
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.