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bind/v4k.lua

@@ -2323,6 +2323,12 @@ FONT_TH =2097152,
 FONT_VI =4194304,
 FONT_CJK = FONT_ZH|FONT_JP|FONT_KR,
 };
+typedef struct font_metrics_t {
+float ascent;
+float descent;
+float linegap;
+float linedist;
+} font_metrics_t;
  void  font_face(const char *face_tag, const char *filename_ttf, float font_size, unsigned flags);
  void  font_face_from_mem(const char *tag, const void *ttf_buffer, unsigned ttf_len, float font_size, unsigned flags);
  void  font_scales(const char *face_tag, float h1, float h2, float h3, float h4, float h5, float h6);
@@ -2332,6 +2338,7 @@ FONT_CJK = FONT_ZH|FONT_JP|FONT_KR,
  void  		   font_goto(float x, float y);
  vec2  		   font_print(const char *text);
  vec2  		   font_rect(const char *text);
+ font_metrics_t font_metrics(const char *text);
  void* font_colorize(const char *text, const char *comma_types, const char *comma_keywords);
  vec2  font_highlight(const char *text, const void *colors);
  int         input_use( int controller_id );
@@ -3342,7 +3349,7 @@ unsigned play;
 bool paused;
 struct atlas_t *a;
 } sprite_t;
-enum { OBJTYPE_sprite_t = 10 };       typedef struct { unsigned static_assert_on_L__LINE__ : !!(10 <= 255); } static_assert_on_Lconcat(_L,3963)___COUNTER__;       typedef struct { unsigned static_assert_on_L__LINE__ : !!(sizeof(sprite_t)); } static_assert_on_Lconcat(_L,3963)___COUNTER__;;
+enum { OBJTYPE_sprite_t = 10 };       typedef struct { unsigned static_assert_on_L__LINE__ : !!(10 <= 255); } static_assert_on_Lconcat(_L,3971)___COUNTER__;       typedef struct { unsigned static_assert_on_L__LINE__ : !!(sizeof(sprite_t)); } static_assert_on_Lconcat(_L,3971)___COUNTER__;;
  void     sprite_ctor(sprite_t *s);
  void     sprite_dtor(sprite_t *s);
  void     sprite_tick(sprite_t *s);

engine/joint/v4k.h

@@ -16115,6 +16115,13 @@ enum FONT_FLAGS {
     // FONT_DEFAULTS = FONT_512 | FONT_NO_OVERSAMPLE | FONT_ASCII,
 };
 
+typedef struct font_metrics_t {
+	float ascent;   // max distance above baseline for all glyphs
+    float descent;  // max distance below baseline for all glyphs
+    float linegap;  // distance betwen ascent of next line and descent of current line
+    float linedist; // distance between the baseline of two lines (ascent - descent + linegap)
+} font_metrics_t;
+
 // configures
 API void  font_face(const char *face_tag, const char *filename_ttf, float font_size, unsigned flags);
 API void  font_face_from_mem(const char *tag, const void *ttf_buffer, unsigned ttf_len, float font_size, unsigned flags);
@@ -16127,6 +16134,7 @@ API vec2  font_xy();
 API void  		   font_goto(float x, float y);
 API vec2  		   font_print(const char *text);
 API vec2  		   font_rect(const char *text);
+API font_metrics_t font_metrics(const char *text);
 //  void  font_clip(vec2 topleft, vec2 bottomright);
 //  void  font_wrap(vec2 topleft, vec2 bottomright);
 
@@ -360722,6 +360730,37 @@ vec2 font_highlight(const char *text, const void *colors) {
 vec2 font_rect(const char *str) {
     return font_draw_ex(str, gotoxy, NULL, NULL);
 }
+
+font_metrics_t font_metrics(const char *text) {
+    font_metrics_t m={0};
+    int S = 3;
+    font_t *f = &fonts[0];
+
+    // utf8 to utf32
+    array(uint32_t) unicode = string32(text);
+
+    // parse string
+    for( int i = 0, end = array_count(unicode); i < end; ++i ) {
+        uint32_t ch = unicode[i];
+        if( ch >= 1 && ch <= 6 ) {
+            S = ch;
+            continue;
+        }
+        if( ch >= 0x1a && ch <= 0x1f ) {
+            if( fonts[ ch - 0x1a ].initialized) {
+                // change face
+                f = &fonts[ ch - 0x1a ];
+            }
+            continue;
+        }
+    }
+
+    m.ascent = f->ascent*f->factor*f->scale[S];
+    m.descent = f->descent*f->factor*f->scale[S];
+    m.linegap = f->linegap*f->factor*f->scale[S];
+    m.linedist = f->linedist*f->factor*f->scale[S];
+    return m;
+}
 #line 0
 
 #line 1 "v4k_gui.c"

engine/split/v4k_font.c

@@ -2396,3 +2396,34 @@ vec2 font_highlight(const char *text, const void *colors) {
 vec2 font_rect(const char *str) {
     return font_draw_ex(str, gotoxy, NULL, NULL);
 }
+
+font_metrics_t font_metrics(const char *text) {
+    font_metrics_t m={0};
+    int S = 3;
+    font_t *f = &fonts[0];
+
+    // utf8 to utf32
+    array(uint32_t) unicode = string32(text);
+
+    // parse string
+    for( int i = 0, end = array_count(unicode); i < end; ++i ) {
+        uint32_t ch = unicode[i];
+        if( ch >= 1 && ch <= 6 ) {
+            S = ch;
+            continue;
+        }
+        if( ch >= 0x1a && ch <= 0x1f ) {
+            if( fonts[ ch - 0x1a ].initialized) {
+                // change face
+                f = &fonts[ ch - 0x1a ];
+            }
+            continue;
+        }
+    }
+
+    m.ascent = f->ascent*f->factor*f->scale[S];
+    m.descent = f->descent*f->factor*f->scale[S];
+    m.linegap = f->linegap*f->factor*f->scale[S];
+    m.linedist = f->linedist*f->factor*f->scale[S];
+    return m;
+}

engine/split/v4k_font.h

@@ -70,6 +70,13 @@ enum FONT_FLAGS {
     // FONT_DEFAULTS = FONT_512 | FONT_NO_OVERSAMPLE | FONT_ASCII,
 };
 
+typedef struct font_metrics_t {
+	float ascent;   // max distance above baseline for all glyphs
+    float descent;  // max distance below baseline for all glyphs
+    float linegap;  // distance betwen ascent of next line and descent of current line
+    float linedist; // distance between the baseline of two lines (ascent - descent + linegap)
+} font_metrics_t;
+
 // configures
 API void  font_face(const char *face_tag, const char *filename_ttf, float font_size, unsigned flags);
 API void  font_face_from_mem(const char *tag, const void *ttf_buffer, unsigned ttf_len, float font_size, unsigned flags);
@@ -82,6 +89,7 @@ API vec2  font_xy();
 API void  		   font_goto(float x, float y);
 API vec2  		   font_print(const char *text);
 API vec2  		   font_rect(const char *text);
+API font_metrics_t font_metrics(const char *text);
 //  void  font_clip(vec2 topleft, vec2 bottomright);
 //  void  font_wrap(vec2 topleft, vec2 bottomright);