css_effect_parse.hpp

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#pragma once
 
// CSS effect values that a renderer needs as numbers and enums rather than as
// strings: the blur radius out of a filter list, and a blend-mode keyword.
//
// These live apart from the import path because both render lanes need them
// and neither owns them. Keeping them together is also what stops the two
// lanes drifting — the JS bridge and the native tree read the same rules.
 
#include <pulp/canvas/canvas.hpp>
 
#include <optional>
#include <string>
#include <string_view>
#include <vector>
 
namespace pulp::view {

std::optional<float> css_blur_radius(const std::string& filter);

std::vector<canvas::Canvas::FilterChainEntry> css_filter_chain(
    const std::string& filter);

std::optional<canvas::Canvas::BlendMode> css_blend_mode(const std::string& keyword);

std::optional<float> css_transform_rotation(const std::string& transform);

bool css_keyword_is_none(std::string_view value);
 
}  // namespace pulp::view