59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
//
|
|
// Created by sebastian on 10.02.26.
|
|
//
|
|
|
|
#include "Font.h"
|
|
|
|
#include <iostream>
|
|
#include <stdexcept>
|
|
|
|
Font::Font(const std::string &fontPath, unsigned int fontSize) {
|
|
if (FT_Init_FreeType(&ft)) throw std::runtime_error("Could not init FreeType");
|
|
if (FT_New_Face(ft, fontPath.c_str(), 0, &face)) throw std::runtime_error("Failed to load font");
|
|
|
|
FT_Set_Pixel_Sizes(face, 0, fontSize);
|
|
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // 1 byte per pixel
|
|
|
|
for (unsigned char c = 0; c < 128; c++) {
|
|
if (FT_Load_Char(face, c, FT_LOAD_RENDER)) {
|
|
std::cerr << "Failed to load char: " << (int)c << "\n";
|
|
continue;
|
|
}
|
|
|
|
GLuint texture;
|
|
glGenTextures(1, &texture);
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED,
|
|
face->glyph->bitmap.width,
|
|
face->glyph->bitmap.rows,
|
|
0, GL_RED, GL_UNSIGNED_BYTE,
|
|
face->glyph->bitmap.buffer);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
|
|
Character character = {
|
|
texture,
|
|
{face->glyph->bitmap.width, face->glyph->bitmap.rows},
|
|
{face->glyph->bitmap_left, face->glyph->bitmap_top},
|
|
static_cast<unsigned int>(face->glyph->advance.x)
|
|
};
|
|
characters.insert({c, character});
|
|
}
|
|
|
|
FT_Done_Face(face);
|
|
FT_Done_FreeType(ft);
|
|
}
|
|
|
|
Font::Character Font::getCharacter(char c) const {
|
|
unsigned char uc = static_cast<unsigned char>(c);
|
|
auto it = characters.find(uc);
|
|
if (it != characters.end())
|
|
return it->second;
|
|
else
|
|
throw std::runtime_error("Character not loaded: " + std::to_string(uc));
|
|
}
|