scufpong/subprojects/scufeng-x86_64/include/scufeng/text.h

#ifndef SCUFENG_TEXT_H_
#define SCUFENG_TEXT_H_

#include <stdint.h>

#include "cglm/types.h"

#include "scufeng/engine.h"
#include "scufeng/Mesh.h"
#include "scufcont/DString.h"

#define SETextInput_pos(ti) (ti.bg_mesh.transform.pos)
#define SETextInput_scale(ti) (ti.bg_mesh.transform.scale)

typedef struct {
    unsigned int textures[128];
    ivec2 sizes[128];
    ivec2 bearings[128];
    unsigned int advances[128];
    int size_x_max;
    int size_y_max;
    int bearing_y_max;
} SEFont;

typedef struct {
    bool active;
    size_t cursor;
    SEMesh cursor_mesh;
    SEMesh bg_mesh;
    SCDString text;
    vec3 text_color;
} SETextInput;

SEResult se_font_load(
    const char *path,
    const unsigned int pixel_w,
    const unsigned int pixel_h,
    size_t *const font_id
);
void se_font_set(const size_t font_id);
SEFont *se_font_current_get();
size_t se_font_current_get_id();

/**
  @param x Left edge of text.
  @param y Bottom of text. For example, the bottom edge of a '_' character is at y.
  @param h Height scale. Values above font.size_y_max scale up, values below it scale down. Set to 0 or font.size_y_max for no scaling.
*/
int se_text_render(
    const char *text,
    unsigned int x,
    unsigned int y,
    unsigned int h,
    const vec3 color
);

SETextInput SETextInput_alloc(
    const char *text,
    const size_t text_len,
    vec3 color,
    vec4 bg_color
);
void SETextInput_free(SETextInput *const ti);
void SETextInput_scale_set(SETextInput *const ti, const vec2 dims);
void SETextInput_pos_set(SETextInput *const ti, const vec2 pos);
void SETextInput_color_set(SETextInput *const ti, const vec3 color);
void SETextInput_bg_color_set(SETextInput *const ti, const vec4 color);
SCDString *SETextInput_string_get_ref(SETextInput *const ti);
void SETextInput_deactivate();
void SETextInput_activate(SETextInput *const ti);
void SETextInput_bbox_get(
    const SETextInput *const ti,
    float *const left,
    float *const top,
    float *const right,
    float *const bottom
);
void SETextInput_bbox_get_v(const SETextInput *const ti, vec4 bbox);
SEResult SETextInput_text_copy(const SETextInput *const ti, SCDString *const dst);
const char *SETextInput_c_str(const SETextInput *const ti);
SEResult SETextInput_char_insert_at_cursor(SETextInput *const ti, const char ch);
void SETextInput_char_remove_at_cursor(SETextInput *const ti);
bool SETextInput_is_pos_inside(const SETextInput *const ti, const float x, const float y);
void SETextInput_render_2d(SETextInput *const ti);
void SETextInput_render_multiple_2d(SETextInput *const *const tis, const size_t ti_count);

#endif // SCUFENG_TEXT_H_