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[rtext] Add MeasureTextCodepoints() for direct measurement of codepoints (#5623)

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* Measuring length of an array of codepoints

* Applied style changes and removed default measurement function
This commit is contained in:
moe li
2026-03-05 18:49:57 +08:00
committed by GitHub
parent 84dc56ba89
commit 02b592cd7b
2 changed files with 59 additions and 0 deletions
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1
src/raylib.h
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@@ -1509,6 +1509,7 @@ RLAPI void DrawTextCodepoints(Font font, const int *codepoints, int codepointCou
RLAPI void SetTextLineSpacing(int spacing); // Set vertical line spacing when drawing with line-breaks
RLAPI int MeasureText(const char *text, int fontSize); // Measure string width for default font
RLAPI Vector2 MeasureTextEx(Font font, const char *text, float fontSize, float spacing); // Measure string size for Font
RLAPI Vector2 MeasureTextCodepoints(Font font, const int *codepoints, int length, float fontSize, float spacing); // Measure string size for an existing array of codepoints for Font
RLAPI int GetGlyphIndex(Font font, int codepoint); // Get glyph index position in font for a codepoint (unicode character), fallback to '?' if not found
RLAPI GlyphInfo GetGlyphInfo(Font font, int codepoint); // Get glyph font info data for a codepoint (unicode character), fallback to '?' if not found
RLAPI Rectangle GetGlyphAtlasRec(Font font, int codepoint); // Get glyph rectangle in font atlas for a codepoint (unicode character), fallback to '?' if not found

58
src/rtext.c
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@@ -1388,6 +1388,64 @@ Vector2 MeasureTextEx(Font font, const char *text, float fontSize, float spacing
return textSize;
}
// Measure string size for an existing array of codepoints for Font
Vector2 MeasureTextCodepoints(Font font, const int *codepoints, int length, float fontSize, float spacing)
{
Vector2 textSize = { 0 };
// Security check
if ((font.texture.id == 0) || (codepoints == NULL) || (length == 0)) return textSize;
float textWidth = 0.0f;
// Used to count longer text line width
float tempTextWidth = 0.0f;
// Used to count longer text line num chars
int tempGlyphCounter = 0;
int glyphCounter = 0;
float textHeight = fontSize;
float scaleFactor = fontSize/(float)font.baseSize;
// Current character
int letter = 0;
// Index position in sprite font
int index = 0;
for (int i = 0; i < length; i++)
{
letter = codepoints[i];
index = GetGlyphIndex(font, letter);
if (letter != '\n')
{
glyphCounter++;
if (font.glyphs[index].advanceX > 0) textWidth += font.glyphs[index].advanceX;
else textWidth += (font.recs[index].width + font.glyphs[index].offsetX);
}
else
{
if (tempTextWidth < textWidth) tempTextWidth = textWidth;
textWidth = 0;
glyphCounter = 0;
// NOTE: Line spacing is a global variable, use SetTextLineSpacing() to setup
textHeight += (fontSize + textLineSpacing);
}
if (tempGlyphCounter < glyphCounter) tempGlyphCounter = glyphCounter;
}
if (tempTextWidth < textWidth) tempTextWidth = textWidth;
textSize.x = tempTextWidth*scaleFactor + (float)((tempGlyphCounter - 1)*spacing);
textSize.y = textHeight;
return textSize;
}
// Get index position for a unicode character on font
// NOTE: If codepoint is not found in the font it fallbacks to '?'
int GetGlyphIndex(Font font, int codepoint)