Vulkan Cookbook

How it works...

Vertex positions are transformed (usually inside a vertex shader) from the local space into a clip space. The hardware then performs a perspective division which generates normalized device coordinates. Next, polygons are assembled and rasterized--this process generates fragments. Each fragment has its own position defined in a framebuffer's coordinates. Also, for this position to be correctly calculated, a viewport transformation is required. Parameters of this transformation are specified in a viewport state.

The viewport and scissor test state is optional, though commonly used--we don't need to provide it when rasterization is disabled.

Through a viewport state, we define the top-left corner and the width and height of ...