pulp::view::web::ViewportMapping Struct Reference

Maps CSS pixels — the unit every browser pointer event reports — to root-view coordinates. More...

#include <web_event_translate.hpp>

Public Member Functions
bool	has_design_viewport () const
bool	transform (float &sx, float &sy, float &tx, float &ty) const
	Root → CSS transform, or false when no design viewport is active (identity; outputs untouched).

Public Attributes
float	css_width = 0
float	css_height = 0
float	design_width = 0
float	design_height = 0
bool	top_align = false

Detailed Description

Maps CSS pixels — the unit every browser pointer event reports — to root-view coordinates.

HiDPI is deliberately absent from this transform. The canvas backing store is sized css * devicePixelRatio and Skia re-applies the same factor at paint time (SkiaSurface scale factor), so root coordinates stay in CSS pixels: dividing pointer coordinates by the ratio here would scale the input twice.

With a design viewport (design_width/design_height > 0) the root is pinned at design size and letterboxed into the canvas, exactly as the macOS GPU host does, so the mapping becomes the inverse of WindowHost::compute_design_viewport_transform().

Member Function Documentation

has_design_viewport()

bool pulp::view::web::ViewportMapping::has_design_viewport ( ) const

inline

transform()

bool pulp::view::web::ViewportMapping::transform ( float & sx, float & sy, float & tx, float & ty ) const

inline

Root → CSS transform, or false when no design viewport is active (identity; outputs untouched).

Member Data Documentation

css_height

float pulp::view::web::ViewportMapping::css_height = 0

css_width

float pulp::view::web::ViewportMapping::css_width = 0

design_height

float pulp::view::web::ViewportMapping::design_height = 0

design_width

float pulp::view::web::ViewportMapping::design_width = 0

top_align

bool pulp::view::web::ViewportMapping::top_align = false

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The documentation for this struct was generated from the following file:

• /home/runner/work/pulp/pulp/core/view/include/pulp/view/web/web_event_translate.hpp