viktorljung
109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
#include "Rendering/Font.h"
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Font::Font(std::string path)
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{
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typedef boost::tokenizer<boost::char_separator<char>> tokenizer;
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boost::char_separator<char> sep(",");
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tokenizer tok(path, sep);
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tokenizer::iterator it = tok.begin();
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std::string filePath = "";
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if (it != tok.end()) {
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filePath = (*it).c_str();
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it++;
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if (it != tok.end()) {
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if((*it).c_str() == "") {
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throw std::runtime_error("");
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}
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try {
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FontSize = boost::lexical_cast<int>((*it).c_str());
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} catch (boost::bad_lexical_cast const&) {
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LOG_ERROR("input string did not have a valid font resolution");
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throw std::runtime_error("");
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}
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}
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} else {
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throw std::runtime_error("");;
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}
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FT_Library library;
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FT_Face face;
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if (FT_Init_FreeType(&library)) {
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LOG_ERROR("FreeType error: init failed");
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throw std::runtime_error("");;
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}
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if (FT_New_Face(library, filePath.c_str(), 0, &face)) {
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LOG_ERROR("FreeType error: loading font");
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throw std::runtime_error("");;
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}
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FT_Set_Char_Size(face, 0, FontSize*64, 300, 300); // temp
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FT_Set_Pixel_Sizes(face, 0, FontSize); //
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if (FT_Load_Char(face, 'X', FT_LOAD_RENDER)) {
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LOG_ERROR("FreeType error: loading char");
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throw std::runtime_error("");;
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}
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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for (GLubyte c = 0; c < 128; c++) {
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//Load character glyph
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if (FT_Load_Char(face, c, FT_LOAD_RENDER)) {
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continue;
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}
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//Generate texture
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GLuint texture;
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glGenTextures(1, &texture);
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glBindTexture(GL_TEXTURE_2D, texture);
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glTexImage2D(
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GL_TEXTURE_2D,
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0,
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GL_RED,
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face->glyph->bitmap.width,
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face->glyph->bitmap.rows,
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0,
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GL_RED,
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GL_UNSIGNED_BYTE,
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face->glyph->bitmap.buffer
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);
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// Set texture options
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// Now store character for later use
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Character character = {
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texture,
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glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
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glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
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face->glyph->advance.x
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};
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m_Characters.insert(std::pair<GLchar, Character>(c, character));
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}
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FT_Done_Face(face);
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FT_Done_FreeType(library);
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GLERROR("Font Load");
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}
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Font::~Font()
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{
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for (auto c : m_Characters) {
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glDeleteTextures(1, &c.second.TextureID);
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}
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}
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