blf_internal.hh

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/* SPDX-FileCopyrightText: 2009 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#include "BLI_array.hh"
#include "BLI_bounds_types.hh"
#include "BLI_function_ref.hh"
#include "BLI_string_ref.hh"
#include "BLI_vector.hh"
 
struct FontBLF;
struct GlyphBLF;
struct GlyphCacheBLF;
struct ListBase;
struct ResultBLF;
struct rcti;
enum class BLFWrapMode;

#define BLF_MAX_FONT 64

#define BLF_SUBPIXEL_POSITION

#define BLF_SUBPIXEL_AA

#define BLF_CACHE_MAX_FACES 4
#define BLF_CACHE_MAX_SIZES 8
#define BLF_CACHE_BYTES 400000

#define BLF_ICON_OFFSET 0x100000L

#define BLF_DPI 72

extern FontBLF *global_font[BLF_MAX_FONT];
 
void blf_batch_draw_begin(FontBLF *font);
void blf_batch_draw();

char *blf_dir_metrics_search(const char *filepath);
 
int blf_font_init();
void blf_font_exit();

uint blf_get_char_index(FontBLF *font, uint charcode);

bool blf_ensure_face(FontBLF *font);
void blf_ensure_size(FontBLF *font);
 
void blf_draw_buffer__start(FontBLF *font);
void blf_draw_buffer__end();
 
FontBLF *blf_font_new_from_filepath(const char *filepath);
FontBLF *blf_font_new_from_mem(const char *mem_name, const unsigned char *mem, size_t mem_size);
void blf_font_attach_from_mem(FontBLF *font, const unsigned char *mem, size_t mem_size);

bool blf_font_size(FontBLF *font, float size);
 
void blf_font_draw(FontBLF *font, const char *str, size_t str_len, ResultBLF *r_info);
void blf_font_draw__wrap(FontBLF *font, const char *str, size_t str_len, ResultBLF *r_info);
 
void blf_draw_svg_icon(FontBLF *font,
                       uint icon_id,
                       float x,
                       float y,
                       float size,
                       const float color[4] = nullptr,
                       float outline_alpha = 1.0f,
                       bool multicolor = false,
                       blender::FunctionRef<void(std::string &)> edit_source_cb = nullptr);
 
blender::Array<uchar> blf_svg_icon_bitmap(
    FontBLF *font,
    uint icon_id,
    float size,
    int *r_width,
    int *r_height,
    bool multicolor = false,
    blender::FunctionRef<void(std::string &)> edit_source_cb = nullptr);
 
blender::Vector<blender::StringRef> blf_font_string_wrap(FontBLF *font,
                                                         blender::StringRef str,
                                                         int max_pixel_width,
                                                         BLFWrapMode mode);

int blf_font_draw_mono(
    FontBLF *font, const char *str, size_t str_len, int cwidth, int tab_columns);
void blf_font_draw_buffer(FontBLF *font, const char *str, size_t str_len, ResultBLF *r_info);
void blf_font_draw_buffer__wrap(FontBLF *font, const char *str, size_t str_len, ResultBLF *r_info);
size_t blf_font_width_to_strlen(
    FontBLF *font, const char *str, size_t str_len, int width, int *r_width);
size_t blf_font_width_to_rstrlen(
    FontBLF *font, const char *str, size_t str_len, int width, int *r_width);
void blf_font_boundbox(
    FontBLF *font, const char *str, size_t str_len, rcti *r_box, ResultBLF *r_info);
void blf_font_boundbox__wrap(
    FontBLF *font, const char *str, size_t str_len, rcti *r_box, ResultBLF *r_info);
void blf_font_width_and_height(FontBLF *font,
                               const char *str,
                               size_t str_len,
                               float *r_width,
                               float *r_height,
                               ResultBLF *r_info);
float blf_font_width(FontBLF *font, const char *str, size_t str_len, ResultBLF *r_info);
float blf_font_height(FontBLF *font, const char *str, size_t str_len, ResultBLF *r_info);
float blf_font_fixed_width(FontBLF *font);
int blf_font_glyph_advance(FontBLF *font, const char *str);
int blf_font_height_max(FontBLF *font);
int blf_font_width_max(FontBLF *font);
int blf_font_descender(FontBLF *font);
int blf_font_ascender(FontBLF *font);
 
char *blf_display_name(FontBLF *font);
 
void blf_font_boundbox_foreach_glyph(
    FontBLF *font,
    const char *str,
    size_t str_len,
    bool (*user_fn)(const char *str, size_t str_step_ofs, const rcti *bounds, void *user_data),
    void *user_data);
 
size_t blf_str_offset_from_cursor_position(FontBLF *font,
                                           const char *str,
                                           size_t str_len,
                                           int location_x);
 
void blf_str_offset_to_glyph_bounds(FontBLF *font,
                                    const char *str,
                                    size_t str_offset,
                                    rcti *r_glyph_bounds);
 
blender::Vector<blender::Bounds<int>> blf_str_selection_boxes(
    FontBLF *font, const char *str, size_t str_len, size_t sel_start, size_t sel_length);
 
int blf_str_offset_to_cursor(
    FontBLF *font, const char *str, size_t str_len, size_t str_offset, int cursor_width);
 
void blf_font_free(FontBLF *font);
 
GlyphCacheBLF *blf_glyph_cache_acquire(FontBLF *font);
void blf_glyph_cache_release(FontBLF *font);
void blf_glyph_cache_clear(FontBLF *font);

GlyphBLF *blf_glyph_ensure(FontBLF *font, GlyphCacheBLF *gc, uint charcode, uint8_t subpixel = 0);
 
#ifdef BLF_SUBPIXEL_AA
GlyphBLF *blf_glyph_ensure_subpixel(FontBLF *font, GlyphCacheBLF *gc, GlyphBLF *g, int32_t pen_x);
#endif
 
GlyphBLF *blf_glyph_ensure_icon(
    GlyphCacheBLF *gc,
    uint icon_id,
    bool color = false,
    blender::FunctionRef<void(std::string &)> edit_source_cb = nullptr);

float blf_character_to_curves(FontBLF *font,
                              unsigned int unicode,
                              ListBase *nurbsbase,
                              const float scale,
                              bool use_fallback);
 
void blf_glyph_draw(FontBLF *font, GlyphCacheBLF *gc, GlyphBLF *g, int x, int y);
 
#ifdef WIN32
/* `blf_font_win32_compat.cc` */
 
#  ifdef FT_FREETYPE_H
extern FT_Error FT_New_Face__win32_compat(FT_Library library,
                                          const char *pathname,
                                          FT_Long face_index,
                                          FT_Face *aface);
#  endif
#endif