pimoroni-pico/libraries/pico_vector/alright_fonts.hpp

75 wiersze
1.9 KiB
C++
Czysty Zwykły widok Historia

#include <cstdint>
#include <math.h>
#include <string.h>
#include <algorithm>
#include <vector>
#include <optional>
#include <map>
#include "pretty_poly.hpp"
namespace alright_fonts {
struct glyph_t {
uint16_t codepoint;
pretty_poly::rect_t bounds;
uint8_t advance;
std::vector<pretty_poly::contour_t<int8_t>> contours;
};
struct face_t {
uint16_t glyph_count;
uint16_t flags;
std::map<uint16_t, glyph_t> glyphs;
face_t() {};
face_t(pretty_poly::file_io &ifs) {load(ifs);}
face_t(std::string_view path) {load(path);}
bool load(pretty_poly::file_io &ifs);
bool load(std::string_view path);
};
enum alignment_t {
left = 0,
center = 1,
right = 2,
justify = 4,
top = 8,
bottom = 16
};
struct text_metrics_t {
face_t face; // font to write in
int size; // text size in pixels
uint scroll; // vertical scroll offset
int line_height; // spacing between lines (%)
int letter_spacing; // spacing between characters
int word_spacing; // spacing between words
alignment_t align; // horizontal and vertical alignment
//optional<mat3_t> transform; // arbitrary transformation
pretty_poly::antialias_t antialiasing = pretty_poly::X4; // level of antialiasing to apply
void set_size(int s) {
size = s;
2023-08-15 10:42:19 +00:00
line_height = size;
letter_spacing = 0;
2023-08-15 10:42:19 +00:00
word_spacing = size / 2;
}
text_metrics_t() {};
};
2023-08-15 10:42:19 +00:00
/*
utility functions
*/
pretty_poly::rect_t measure_character(text_metrics_t &tm, uint16_t codepoint);
/*
render functions
*/
void render_character(text_metrics_t &tm, uint16_t codepoint, pretty_poly::point_t<int> origin);
template<typename mat_t>
void render_character(text_metrics_t &tm, uint16_t codepoint, pretty_poly::point_t<int> origin, mat_t transform);
}