[rtext] Sometimes fails to pack characters into glyph atlas #5141
Description
I was trying to draw text at the native resolution by reloading the font when the font size changes, instead of using blurry scaling of the font.
#include "raylib.h"
#include <stdio.h>
void DrawFiraFont(char* msg, Vector2 pos, int size, int spacing, Color color) {
static _Thread_local int old_font_size;
static _Thread_local Font font;
if (size != old_font_size) {
int count;
int* memory = LoadCodepoints(msg, &count);
for (int i = 0; i < count; i++) {
printf("%c, ", memory[i]);
}
char* f1 = "c:/Users/alexa/Downloads/fonts/CascadiaMono/CaskaydiaMonoNerdFont-BoldItalic.ttf";
char* f2 = "c:/Users/alexa/Downloads/fonts/Fira_Mono/FiraMono-Bold.ttf";
font = LoadFontEx(f2, size, memory, count);
UnloadCodepoints(memory);
old_font_size = size;
}
DrawTextEx(font, msg, pos, size, spacing, WHITE);
}
int main(void)
{
unsigned int n = 8;
InitWindow(800, 600, "Hello");
SetWindowState(FLAG_WINDOW_RESIZABLE);
SetTargetFPS(60);
int scale = 100;
int font_size = 100;
while (!WindowShouldClose())
{
BeginDrawing();
ClearBackground(BLACK);
if (IsKeyDown(KEY_DOWN)) font_size--;
if (IsKeyDown(KEY_UP)) font_size++;
DrawFiraFont("Hello, World", (Vector2){100, 100}, font_size, 0, WHITE);
DrawTextEx((Font){0}, "Hello, World", (Vector2){00, 00}, font_size, 10, WHITE);
EndDrawing();
}
CloseWindow();
return 0;
}But when I used the arrow keys, sporadically I got warnings like these and the correspondings glyphs did not show up on screen.
WARNING: FONT: Failed to package character (9)
WARNING: FONT: Failed to package character (10)
WARNING: FONT: Failed to package character (11)
This happened only for certain font sizes, but I tested it with two different ttf files so I don't think it is related to the specific font file I was using.
Questions:
-> What is the proper way to draw a custom TTF font at a specific font size without using blurry scaling?
NOTE: I know there is an API to generate and the font atlas manually which would allow me to avoid reloading and reparsing the font file, also selecting the packing method 1 (stb_rectpack) gives no packing error.
-> Am I using the LoadFont API correctly? I am passing some codepoints multiple times. Are duplicates allowed?
NOTE: Even if the string contains no duplicate characters the error still shows up.
Expected behaviour:
-> Succesful packing and display of all the codepoints regardless of my specified font size.
Environment
Windows 11, OpenGL 4.5,