refactor(core): simplify font handling

This commit removes the usage of macros for font data definitions. Instead, it includes data as const structs of newly introduced font_info_t type. [no changelog]
2024-11-14 03:30:02 +00:00 · 2024-09-18 15:02:20 +02:00 · 2024-09-18 15:02:20 +02:00 · 25cabd515d
commit 25cabd515d
parent 9b718122f9
4 changed files with 147 additions and 327 deletions
--- a/core/embed/lib/fonts/fonts.c
+++ b/core/embed/lib/fonts/fonts.c
@ -22,124 +22,123 @@
 #include <stdbool.h>
 #include <stddef.h>
 #include <string.h>
+#include "fonts_types.h"
 #ifdef TRANSLATIONS
 #include "librust_fonts.h"
 #endif

-#define UNICODE_BADCHAR 0xFFFD
-
-int font_height(int font) {
-  switch (font) {
+// include selectively based on the SCons variables
 #ifdef TREZOR_FONT_NORMAL_ENABLE
-    case FONT_NORMAL:
-      return FONT_NORMAL_HEIGHT;
+#include TREZOR_FONT_NORMAL_INCLUDE
 #endif
 #ifdef TREZOR_FONT_DEMIBOLD_ENABLE
-    case FONT_DEMIBOLD:
-      return FONT_DEMIBOLD_HEIGHT;
+#include TREZOR_FONT_DEMIBOLD_INCLUDE
+#endif
+#ifdef TREZOR_FONT_BOLD_ENABLE
+#include TREZOR_FONT_BOLD_INCLUDE
+#endif
+#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
+#include TREZOR_FONT_NORMAL_UPPER_INCLUDE
+#endif
+#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
+#include TREZOR_FONT_BOLD_UPPER_INCLUDE
+#endif
+#ifdef TREZOR_FONT_MONO_ENABLE
+#include TREZOR_FONT_MONO_INCLUDE
+#endif
+#ifdef TREZOR_FONT_BIG_ENABLE
+#include TREZOR_FONT_BIG_INCLUDE
+#endif
+#ifdef TREZOR_FONT_SUB_ENABLE
+#include TREZOR_FONT_SUB_INCLUDE
+#endif
+
+#define PASTER(font_name) font_name##_info
+#define FONT_INFO(font_name) PASTER(font_name)
+
+
+static const font_info_t *get_font_info(font_id_t font_id) {
+  switch (font_id) {
+#ifdef TREZOR_FONT_NORMAL_ENABLE
+    case FONT_NORMAL:
+      return &FONT_INFO(TREZOR_FONT_NORMAL_NAME);
 #endif
 #ifdef TREZOR_FONT_BOLD_ENABLE
    case FONT_BOLD:
-      return FONT_BOLD_HEIGHT;
+      return &FONT_INFO(TREZOR_FONT_BOLD_NAME);
 #endif
-#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
-    case FONT_NORMAL_UPPER:
-      return FONT_NORMAL_UPPER_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
-    case FONT_BOLD_UPPER:
-      return FONT_BOLD_UPPER_HEIGHT;
+#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
+    case FONT_DEMIBOLD:
+      return &FONT_INFO(TREZOR_FONT_DEMIBOLD_NAME);
 #endif
 #ifdef TREZOR_FONT_MONO_ENABLE
    case FONT_MONO:
-      return FONT_MONO_HEIGHT;
+      return &FONT_INFO(TREZOR_FONT_MONO_NAME);
 #endif
 #ifdef TREZOR_FONT_BIG_ENABLE
    case FONT_BIG:
-      return FONT_BIG_HEIGHT;
+      return &FONT_INFO(TREZOR_FONT_BIG_NAME);
+#endif
+#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
+    case FONT_NORMAL_UPPER:
+      return &FONT_INFO(TREZOR_FONT_NORMAL_UPPER_NAME);
+#endif
+#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
+    case FONT_BOLD_UPPER:
+      return &FONT_INFO(TREZOR_FONT_BOLD_UPPER_NAME);
 #endif
 #ifdef TREZOR_FONT_SUB_ENABLE
    case FONT_SUB:
-      return FONT_SUB_HEIGHT;
+      return &FONT_INFO(TREZOR_FONT_SUB_NAME);
 #endif
+    default:
+      return NULL;
  }
-  return 0;
+}
+
+int font_height(int font_id) {
+  const font_info_t *font_info = get_font_info(font_id);
+  return font_info ? font_info->height : 0;
 }

 int font_max_height(int font) {
-  switch (font) {
-#ifdef TREZOR_FONT_NORMAL_ENABLE
-    case FONT_NORMAL:
-      return FONT_NORMAL_MAX_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
-    case FONT_DEMIBOLD:
-      return FONT_DEMIBOLD_MAX_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_BOLD_ENABLE
-    case FONT_BOLD:
-      return FONT_BOLD_MAX_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
-    case FONT_NORMAL_UPPER:
-      return FONT_NORMAL_UPPER_MAX_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
-    case FONT_BOLD_UPPER:
-      return FONT_BOLD_UPPER_MAX_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_MONO_ENABLE
-    case FONT_MONO:
-      return FONT_MONO_MAX_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_BIG_ENABLE
-    case FONT_BIG:
-      return FONT_BIG_MAX_HEIGHT;
-#endif
-#ifdef TREZOR_FONT_SUB_ENABLE
-    case FONT_SUB:
-      return FONT_SUB_MAX_HEIGHT;
-#endif
-  }
-  return 0;
+  const font_info_t *font_info = get_font_info(font);
+  return font_info ? font_info->max_height : 0;
 }

 int font_baseline(int font) {
-  switch (font) {
-#ifdef TREZOR_FONT_NORMAL_ENABLE
-    case FONT_NORMAL:
-      return FONT_NORMAL_BASELINE;
-#endif
-#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
-    case FONT_DEMIBOLD:
-      return FONT_DEMIBOLD_BASELINE;
-#endif
-#ifdef TREZOR_FONT_BOLD_ENABLE
-    case FONT_BOLD:
-      return FONT_BOLD_BASELINE;
-#endif
-#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
-    case FONT_NORMAL_UPPER:
-      return FONT_NORMAL_UPPER_BASELINE;
-#endif
-#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
-    case FONT_BOLD_UPPER:
-      return FONT_BOLD_UPPER_BASELINE;
-#endif
-#ifdef TREZOR_FONT_MONO_ENABLE
-    case FONT_MONO:
-      return FONT_MONO_BASELINE;
-#endif
-#ifdef TREZOR_FONT_BIG_ENABLE
-    case FONT_BIG:
-      return FONT_BIG_BASELINE;
-#endif
-#ifdef TREZOR_FONT_SUB_ENABLE
-    case FONT_SUB:
-      return FONT_SUB_BASELINE;
-#endif
+  const font_info_t *font_info = get_font_info(font);
+  return font_info ? font_info->baseline : 0;
+}
+
+const uint8_t *font_get_glyph(int font, uint16_t c) {
+#ifdef TRANSLATIONS
+  // found UTF8 character
+  // it is not hardcoded in firmware fonts, it must be extracted from the
+  // embedded blob
+  if (c >= 0x7F) {
+    const uint8_t *g = get_utf8_glyph(c, font);
+    if (g != NULL) {
+      return g;
+    }
  }
-  return 0;
+#endif
+
+  // printable ASCII character
+  if (c >= ' ' && c < 0x7F) {
+    const font_info_t *font_info = get_font_info(font);
+    if (font_info == NULL) {
+      return NULL;
+    }
+    return font_info->glyph_data[c - ' '];
+  }
+
+  return font_nonprintable_glyph(font);
+}
+
+const uint8_t *font_nonprintable_glyph(int font) {
+  const font_info_t *font_info = get_font_info(font);
+  return font_info ? font_info->glyph_nonprintable : NULL;
 }

 font_glyph_iter_t font_glyph_iter_init(const int font, const uint8_t *text,
@ -151,6 +150,7 @@ font_glyph_iter_t font_glyph_iter_init(const int font, const uint8_t *text,
  };
 }

+#define UNICODE_BADCHAR 0xFFFD
 #define IS_UTF8_CONTINUE(c) (((c) & 0b11000000) == 0b10000000)

 static uint16_t next_utf8_codepoint(font_glyph_iter_t *iter) {
@ -211,103 +211,6 @@ bool font_next_glyph(font_glyph_iter_t *iter, const uint8_t **out) {
  }
 }

-const uint8_t *font_nonprintable_glyph(int font) {
-#define PASTER(s) s##_glyph_nonprintable
-#define NONPRINTABLE_GLYPH(s) PASTER(s)
-
-  switch (font) {
-#ifdef TREZOR_FONT_NORMAL_ENABLE
-    case FONT_NORMAL:
-      return NONPRINTABLE_GLYPH(FONT_NORMAL_DATA);
-#endif
-#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
-    case FONT_DEMIBOLD:
-      return NONPRINTABLE_GLYPH(FONT_DEMIBOLD_DATA);
-#endif
-#ifdef TREZOR_FONT_BOLD_ENABLE
-    case FONT_BOLD:
-      return NONPRINTABLE_GLYPH(FONT_BOLD_DATA);
-#endif
-#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
-    case FONT_NORMAL_UPPER:
-      return NONPRINTABLE_GLYPH(FONT_NORMAL_UPPER_DATA);
-#endif
-#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
-    case FONT_BOLD_UPPER:
-      return NONPRINTABLE_GLYPH(FONT_BOLD_UPPER_DATA);
-#endif
-#ifdef TREZOR_FONT_MONO_ENABLE
-    case FONT_MONO:
-      return NONPRINTABLE_GLYPH(FONT_MONO_DATA);
-#endif
-#ifdef TREZOR_FONT_BIG_ENABLE
-    case FONT_BIG:
-      return NONPRINTABLE_GLYPH(FONT_BIG_DATA);
-#endif
-#ifdef TREZOR_FONT_SUB_ENABLE
-    case FONT_SUB:
-      return NONPRINTABLE_GLYPH(FONT_SUB_DATA);
-#endif
-    default:
-      return NULL;
-  }
-}
-
-const uint8_t *font_get_glyph(int font, uint16_t c) {
-#ifdef TRANSLATIONS
-  // found UTF8 character
-  // it is not hardcoded in firmware fonts, it must be extracted from the
-  // embedded blob
-  if (c >= 0x7F) {
-    const uint8_t *g = get_utf8_glyph(c, font);
-    if (g != NULL) {
-      return g;
-    }
-  }
-#endif
-
-  // printable ASCII character
-  if (c >= ' ' && c < 0x7F) {
-    switch (font) {
-#ifdef TREZOR_FONT_NORMAL_ENABLE
-      case FONT_NORMAL:
-        return FONT_NORMAL_DATA[c - ' '];
-#endif
-#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
-      case FONT_DEMIBOLD:
-        return FONT_DEMIBOLD_DATA[c - ' '];
-#endif
-#ifdef TREZOR_FONT_BOLD_ENABLE
-      case FONT_BOLD:
-        return FONT_BOLD_DATA[c - ' '];
-#endif
-#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
-      case FONT_NORMAL_UPPER:
-        return FONT_NORMAL_UPPER_DATA[c - ' '];
-#endif
-#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
-      case FONT_BOLD_UPPER:
-        return FONT_BOLD_UPPER_DATA[c - ' '];
-#endif
-#ifdef TREZOR_FONT_MONO_ENABLE
-      case FONT_MONO:
-        return FONT_MONO_DATA[c - ' '];
-#endif
-#ifdef TREZOR_FONT_BIG_ENABLE
-      case FONT_BIG:
-        return FONT_BIG_DATA[c - ' '];
-#endif
-#ifdef TREZOR_FONT_SUB_ENABLE
-      case FONT_SUB:
-        return FONT_SUB_DATA[c - ' '];
-#endif
-    }
-    return 0;
-  }
-
-  return font_nonprintable_glyph(font);
-}
-
 // compute the width of the text (in pixels)
 int font_text_width(int font, const char *text, int textlen) {
  int width = 0;
--- a/core/embed/lib/fonts/fonts.h
+++ b/core/embed/lib/fonts/fonts.h
@ -23,6 +23,7 @@
 #include <stdbool.h>

 #include "fonts/font_bitmap.h"
+#include "fonts_types.h"
 #include TREZOR_BOARD

 #ifdef USE_RGB_COLORS
@ -31,140 +32,27 @@
 #define TREZOR_FONT_BPP 1
 #endif

-#define COMPOSE(font_name, suffix) font_name##suffix
-#define FONT_DEFINE(s, suffix) COMPOSE(s, suffix)
-
-#ifdef TREZOR_FONT_NORMAL_ENABLE
-#define FONT_NORMAL (-1)
-#include TREZOR_FONT_NORMAL_INCLUDE
-#define FONT_NORMAL_DATA TREZOR_FONT_NORMAL_NAME
-#define FONT_NORMAL_HEIGHT FONT_DEFINE(TREZOR_FONT_NORMAL_NAME, _HEIGHT)
-#define FONT_NORMAL_MAX_HEIGHT FONT_DEFINE(TREZOR_FONT_NORMAL_NAME, _MAX_HEIGHT)
-#define FONT_NORMAL_BASELINE FONT_DEFINE(TREZOR_FONT_NORMAL_NAME, _BASELINE)
-#endif
-
-#ifdef TREZOR_FONT_BIG_ENABLE
-#include TREZOR_FONT_BIG_INCLUDE
-#define FONT_BIG (-4)
-#define FONT_BIG_DATA TREZOR_FONT_BIG_NAME
-#define FONT_BIG_HEIGHT FONT_DEFINE(TREZOR_FONT_BIG_NAME, _HEIGHT)
-#define FONT_BIG_MAX_HEIGHT FONT_DEFINE(TREZOR_FONT_BIG_NAME, _MAX_HEIGHT)
-#define FONT_BIG_BASELINE FONT_DEFINE(TREZOR_FONT_BIG_NAME, _BASELINE)
-#endif
-
-#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
-#include TREZOR_FONT_DEMIBOLD_INCLUDE
-#define FONT_DEMIBOLD (-5)
-#define FONT_DEMIBOLD_DATA TREZOR_FONT_DEMIBOLD_NAME
-#define FONT_DEMIBOLD_HEIGHT FONT_DEFINE(TREZOR_FONT_DEMIBOLD_NAME, _HEIGHT)
-#define FONT_DEMIBOLD_MAX_HEIGHT \
-  FONT_DEFINE(TREZOR_FONT_DEMIBOLD_NAME, _MAX_HEIGHT)
-#define FONT_DEMIBOLD_BASELINE FONT_DEFINE(TREZOR_FONT_DEMIBOLD_NAME, _BASELINE)
-#endif
-
-#ifdef TREZOR_FONT_SUB_ENABLE
-#include TREZOR_FONT_SUB_INCLUDE
-#define FONT_SUB (-8)
-#define FONT_SUB_DATA TREZOR_FONT_SUB_NAME
-#define FONT_SUB_HEIGHT FONT_DEFINE(TREZOR_FONT_SUB_NAME, _HEIGHT)
-#define FONT_SUB_MAX_HEIGHT FONT_DEFINE(TREZOR_FONT_SUB_NAME, _MAX_HEIGHT)
-#define FONT_SUB_BASELINE FONT_DEFINE(TREZOR_FONT_SUB_NAME, _BASELINE)
-#endif
-
-#ifdef TREZOR_FONT_MONO_ENABLE
-#include TREZOR_FONT_MONO_INCLUDE
-#define FONT_MONO (-3)
-#define FONT_MONO_DATA TREZOR_FONT_MONO_NAME
-#define FONT_MONO_HEIGHT FONT_DEFINE(TREZOR_FONT_MONO_NAME, _HEIGHT)
-#define FONT_MONO_MAX_HEIGHT FONT_DEFINE(TREZOR_FONT_MONO_NAME, _MAX_HEIGHT)
-#define FONT_MONO_BASELINE FONT_DEFINE(TREZOR_FONT_MONO_NAME, _BASELINE)
-#endif
-
-#ifdef TREZOR_FONT_BOLD_ENABLE
-#include TREZOR_FONT_BOLD_INCLUDE
-#define FONT_BOLD (-2)
-#define FONT_BOLD_DATA TREZOR_FONT_BOLD_NAME
-#define FONT_BOLD_HEIGHT FONT_DEFINE(TREZOR_FONT_BOLD_NAME, _HEIGHT)
-#define FONT_BOLD_MAX_HEIGHT FONT_DEFINE(TREZOR_FONT_BOLD_NAME, _MAX_HEIGHT)
-#define FONT_BOLD_BASELINE FONT_DEFINE(TREZOR_FONT_BOLD_NAME, _BASELINE)
-#endif
-
-#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
-#include TREZOR_FONT_NORMAL_UPPER_INCLUDE
-#define FONT_NORMAL_UPPER (-6)
-#define FONT_NORMAL_UPPER_DATA TREZOR_FONT_NORMAL_UPPER_NAME
-#define FONT_NORMAL_UPPER_HEIGHT \
-  FONT_DEFINE(TREZOR_FONT_NORMAL_UPPER_NAME, _HEIGHT)
-#define FONT_NORMAL_UPPER_MAX_HEIGHT \
-  FONT_DEFINE(TREZOR_FONT_NORMAL_UPPER_NAME, _MAX_HEIGHT)
-#define FONT_NORMAL_UPPER_BASELINE \
-  FONT_DEFINE(TREZOR_FONT_NORMAL_UPPER_NAME, _BASELINE)
-#endif
-
-#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
-#include TREZOR_FONT_BOLD_UPPER_INCLUDE
-#define FONT_BOLD_UPPER (-7)
-#define FONT_BOLD_UPPER_DATA TREZOR_FONT_BOLD_UPPER_NAME
-#define FONT_BOLD_UPPER_HEIGHT FONT_DEFINE(TREZOR_FONT_BOLD_UPPER_NAME, _HEIGHT)
-#define FONT_BOLD_UPPER_MAX_HEIGHT \
-  FONT_DEFINE(TREZOR_FONT_BOLD_UPPER_NAME, _MAX_HEIGHT)
-#define FONT_BOLD_UPPER_BASELINE \
-  FONT_DEFINE(TREZOR_FONT_BOLD_UPPER_NAME, _BASELINE)
-#endif
-
+// Calculate the maximum height across all enabled fonts at compile time
 #define MAX_FONT_H(A, B) ((A) > (B) ? (A) : (B))
-
-#define FONT_MAX_HEIGHT_1 0
-#ifdef TREZOR_FONT_NORMAL_ENABLE
-#define FONT_MAX_HEIGHT_2 MAX_FONT_H(FONT_NORMAL_MAX_HEIGHT, FONT_MAX_HEIGHT_1)
-#else
-#define FONT_MAX_HEIGHT_2 FONT_MAX_HEIGHT_1
-#endif
-
-#ifdef TREZOR_FONT_BOLD_ENABLE
-#define FONT_MAX_HEIGHT_3 MAX_FONT_H(FONT_BOLD_MAX_HEIGHT, FONT_MAX_HEIGHT_2)
-#else
-#define FONT_MAX_HEIGHT_3 FONT_MAX_HEIGHT_2
-#endif
-
-#ifdef TREZOR_FONT_BIG_ENABLE
-#define FONT_MAX_HEIGHT_4 MAX_FONT_H(FONT_BIG_MAX_HEIGHT, FONT_MAX_HEIGHT_3)
-#else
-#define FONT_MAX_HEIGHT_4 FONT_MAX_HEIGHT_3
-#endif
-
-#ifdef TREZOR_FONT_DEMIBOLD_ENABLE
-#define FONT_MAX_HEIGHT_5 \
-  MAX_FONT_H(FONT_DEMIBOLD_MAX_HEIGHT, FONT_MAX_HEIGHT_4)
-#else
-#define FONT_MAX_HEIGHT_5 FONT_MAX_HEIGHT_4
-#endif
-
-#ifdef TREZOR_FONT_NORMAL_UPPER_ENABLE
-#define FONT_MAX_HEIGHT_6 \
-  MAX_FONT_H(FONT_NORMAL_UPPER_MAX_HEIGHT, FONT_MAX_HEIGHT_5)
-#else
-#define FONT_MAX_HEIGHT_6 FONT_MAX_HEIGHT_5
-#endif
-
-#ifdef TREZOR_FONT_BOLD_UPPER_ENABLE
-#define FONT_MAX_HEIGHT_7 \
-  MAX_FONT_H(FONT_BOLD_UPPER_MAX_HEIGHT, FONT_MAX_HEIGHT_6)
-#else
-#define FONT_MAX_HEIGHT_7 FONT_MAX_HEIGHT_6
-#endif
-
-#ifdef TREZOR_FONT_SUB_ENABLE
-#define FONT_MAX_HEIGHT_8 MAX_FONT_H(FONT_SUB_MAX_HEIGHT, FONT_MAX_HEIGHT_7)
-#else
-#define FONT_MAX_HEIGHT_8 FONT_MAX_HEIGHT_7
-#endif
-
-#ifdef TREZOR_FONT_MONO_ENABLE
-#define FONT_MAX_HEIGHT MAX_FONT_H(FONT_MONO_MAX_HEIGHT, FONT_MAX_HEIGHT_8)
-#else
-#define FONT_MAX_HEIGHT FONT_MAX_HEIGHT_8
-#endif
+// clang-format off
+#define FONT_MAX_HEIGHT \
+    MAX_FONT_H( \
+    MAX_FONT_H( \
+    MAX_FONT_H( \
+    MAX_FONT_H( \
+    MAX_FONT_H( \
+    MAX_FONT_H( \
+    MAX_FONT_H( \
+    MAX_FONT_H(0, \
+        TREZOR_FONT_NORMAL_ENABLE ? FONT_NORMAL_MAX_HEIGHT : 0), \
+        TREZOR_FONT_BOLD_ENABLE ? FONT_BOLD_MAX_HEIGHT : 0), \
+        TREZOR_FONT_BIG_ENABLE ? FONT_BIG_MAX_HEIGHT : 0), \
+        TREZOR_FONT_DEMIBOLD_ENABLE ? FONT_DEMIBOLD_MAX_HEIGHT : 0), \
+        TREZOR_FONT_NORMAL_UPPER_ENABLE ? FONT_NORMAL_UPPER_MAX_HEIGHT : 0), \
+        TREZOR_FONT_BOLD_UPPER_ENABLE ? FONT_BOLD_UPPER_MAX_HEIGHT : 0), \
+        TREZOR_FONT_SUB_ENABLE ? FONT_SUB_MAX_HEIGHT : 0), \
+        TREZOR_FONT_MONO_ENABLE ? FONT_MONO_MAX_HEIGHT : 0)
+// clang-format on

 int font_height(int font);
 int font_max_height(int font);
@ -172,12 +60,6 @@ int font_baseline(int font);
 const uint8_t *font_get_glyph(int font, uint16_t c);
 const uint8_t *font_nonprintable_glyph(int font);

-typedef struct {
-  const int font;
-  const uint8_t *text;
-  int remaining;
-} font_glyph_iter_t;
-
 font_glyph_iter_t font_glyph_iter_init(const int font, const uint8_t *text,
                                       const int len);
 bool font_next_glyph(font_glyph_iter_t *iter, const uint8_t **out);
--- a/core/embed/lib/fonts/fonts_types.h
+++ b/core/embed/lib/fonts/fonts_types.h
@ -0,0 +1,35 @@
+#ifndef _FONTS_TYPES_H
+#define _FONTS_TYPES_H
+
+#include <stdint.h>
+
+/// Font information structure containing metadata and pointers to font data
+typedef struct {
+  const char* name;
+  int height;
+  int max_height;
+  int baseline;
+  const uint8_t* const* glyph_data;
+  const uint8_t* glyph_nonprintable;
+} font_info_t;
+
+/// Font identifiers
+typedef enum {
+  FONT_NORMAL = -1,
+  FONT_BOLD = -2,
+  FONT_MONO = -3,
+  FONT_BIG = -4,
+  FONT_DEMIBOLD = -5,
+  FONT_NORMAL_UPPER = -6,
+  FONT_BOLD_UPPER = -7,
+  FONT_SUB = -8,
+} font_id_t;
+
+/// Font glyph iterator structure
+typedef struct {
+  const int font;
+  const uint8_t* text;
+  int remaining;
+} font_glyph_iter_t;
+
+#endif  // _FONTS_TYPES_H
--- a/core/embed/rust/src/ui/display/font.rs
+++ b/core/embed/rust/src/ui/display/font.rs
@ -142,8 +142,8 @@ impl Glyph {
    }
 }

-/// Font constants. Keep in sync with FONT_ definitions in
-/// `core/embed/lib/fonts/fonts.h`.
+/// Font constants. Keep in sync with `font_id_t` definition in
+/// `core/embed/lib/fonts/fonts_types.h`.
 #[derive(Copy, Clone, PartialEq, Eq, FromPrimitive)]
 #[repr(u8)]
 #[allow(non_camel_case_types)]