add engine version

1 files changed, 74 insertions, 0 deletions

diff --git a/engine-ocean/Graphics/font.cpp b/engine-ocean/Graphics/font.cpp
new file mode 100644
index 0000000..b5bc7a1
--- /dev/null
+++ b/engine-ocean/Graphics/font.cpp
@@ -0,0 +1,74 @@
+#include "font.h"
+#include <iostream>
+
+Font::Font(const std::string filepath){
+    FT_Library ft;
+    if (FT_Init_FreeType(&ft))
+    {
+        std::cout << "ERROR::FREETYPE: Could not init FreeType Library" << std::endl;
+    }
+
+    FT_Face face;
+    if (FT_New_Face(ft, filepath.data(), 0, &face))
+    {
+        std::cout << "ERROR::FREETYPE: Failed to load font" << std::endl;  
+    }
+
+    FT_Set_Pixel_Sizes(face, 0, 48);
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // disable byte-alignment restriction
+  
+    for (unsigned char c = 0; c < 128; c++)
+    {
+        createGlyphTexture(c, face);
+    }
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // Back to default value
+    FT_Done_Face(face);
+    FT_Done_FreeType(ft);
+}
+
+Font::~Font(){
+
+}
+
+void Font::createGlyphTexture(unsigned char c, FT_Face &face){
+    if (FT_Load_Char(face, c, FT_LOAD_RENDER))
+    {
+        std::cout << "ERROR::FREETYTPE: Failed to load Glyph" << std::endl;
+        return;
+    }
+    // generate texture
+    unsigned int 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
+    );
+    // set texture options
+    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);
+    // now store character for later use
+    unsigned int advance = static_cast<unsigned int>(face->glyph->advance.x);
+    Character character = {
+        texture, 
+        glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
+        glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
+        advance
+    };
+    m_characters.insert(std::pair<char, Character>(c, character));
+}
+
+Character& Font::getCharacter(char c){
+    return m_characters[c];
+}