text.h

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#pragma once
 
#include <stddef.h>
#include <stdint.h>
 
#include "tinyimg/image.h"
#include "tinyimg/memory.h"
#include "tinyimg/tinyimg.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#pragma region font loading

typedef enum TinyFontKind
{
    TINYIMG_FONT_TRUETYPE = 0,
    TINYIMG_FONT_PSF = 1,
    TINYIMG_FONT_BDF = 2,
} TinyFontKind;

typedef struct {
    const uint8_t* data;
    size_t size;
    TinyFontKind kind;

    uint32_t cmap;
    uint32_t glyf;
    uint32_t loca;
    uint32_t hmtx;
    uint32_t kern;
    uint32_t glyf_size;
    uint32_t glyphs;
    uint32_t hmetrics;
    uint32_t units_per_em;
    uint8_t long_loca;

    int32_t ascent;
    int32_t descent;
    int32_t line_gap;

    uint32_t cell_width;
    uint32_t cell_height;
    uint32_t glyph_bytes;
    uint32_t bitmap;

    uint32_t* index;
    uint32_t index_count;
} TinyFont;

typedef struct {
    float ascent;
    float descent;
    float line_height;
    float size;
    uint32_t glyphs;
    uint8_t fixed_size;
} TinyFontMetrics;

int tiny_font_load(TinyFont* font, const char* blob_id);

int tiny_font_load_bytes(TinyFont* font, const uint8_t* data, size_t size);

void tiny_font_free(TinyFont* font);

int tiny_font_metrics(const TinyFont* font, float size, TinyFontMetrics* out);

int tiny_font_has_glyph(const TinyFont* font, uint32_t codepoint);

uint32_t tiny_font_sizeof(void);

uint32_t tiny_font_metrics_sizeof(void);
 
#pragma endregion
 
#pragma region text drawing

typedef struct {
    float size;
    float tracking;
    float line_height;
    uint8_t kerning;
} TinyTextStyle;

typedef struct {
    float width;
    float height;
    float ascent;
    float descent;
    float line_height;
    uint32_t lines;
    uint32_t glyphs;
    uint32_t missing;
} TinyTextMetrics;

typedef enum TinyTextAlign
{
    TINYIMG_ALIGN_LEFT = 0,
    TINYIMG_ALIGN_CENTER = 1,
    TINYIMG_ALIGN_RIGHT = 2,
} TinyTextAlign;

void tiny_text_style(TinyTextStyle* style, float size);

int tiny_image_draw_text(
    TinyImage* image, const TinyFont* font, const char* text, int32_t x,
    int32_t y, const TinyTextStyle* style, const uint8_t* color
);

int tiny_image_draw_text_box(
    TinyImage* image, const TinyFont* font, const char* text, int32_t x,
    int32_t y, uint32_t width, uint32_t height, const TinyTextStyle* style,
    TinyTextAlign align, const uint8_t* color
);

int tiny_text_measure(
    const TinyFont* font, const char* text, const TinyTextStyle* style,
    TinyTextMetrics* out
);

int tiny_text_measure_wrapped(
    const TinyFont* font, const char* text, uint32_t width,
    const TinyTextStyle* style, TinyTextMetrics* out
);

uint32_t tiny_text_style_sizeof(void);

uint32_t tiny_text_metrics_sizeof(void);
 
#pragma endregion
 
#ifdef __cplusplus
}
#endif