Implemented basic game dll interaction

src/Engine/Asset/FontLoader.cpp

@@ -2,6 +2,9 @@
 #include "Graphics/Graphics.h"
 #include "FontAsset.h"
 #include "AssetRegistry.h"
+#include "Graphics/GraphicsResources.h"
+#include <ft2build.h>
+#include FT_FREETYPE_H
 
 using namespace Seele;
 
@@ -27,7 +30,49 @@ void FontLoader::importAsset(const std::filesystem::path& filePath, const std::s
     import(filePath, asset);
 }
 
+// in case of the space character there is no bitmap
+// so we create a single pixel empty texture
+uint8 transparentPixel = 0;
 void FontLoader::import(std::filesystem::path path, PFontAsset asset)
 {
-    asset->load();
+    FT_Library ft;
+    FT_Error error = FT_Init_FreeType(&ft);
+    assert(!error);
+    FT_Face face;
+    error = FT_New_Face(ft, asset->getFullPath().c_str(), 0, &face);
+    assert(!error);
+    FT_Set_Pixel_Sizes(face, 0, 48);
+    for(uint32 c = 0; c < 256; ++c)
+    {
+        if(FT_Load_Char(face, c, FT_LOAD_RENDER))
+        {
+            std::cout << "error loading " << (char)c << std::endl;
+            continue;
+        }
+        FontAsset::Glyph& glyph = asset->glyphs[c];
+        glyph.size = IVector2(face->glyph->bitmap.width, face->glyph->bitmap.rows);
+        glyph.bearing = IVector2(face->glyph->bitmap_left, face->glyph->bitmap_top);
+        glyph.advance = face->glyph->advance.x;
+        TextureCreateInfo imageData;
+        imageData.format = Gfx::SE_FORMAT_R8_UINT;
+        imageData.width = face->glyph->bitmap.width;
+        imageData.height = face->glyph->bitmap.rows;
+        imageData.resourceData.data = face->glyph->bitmap.buffer;
+        imageData.resourceData.size = imageData.width * imageData.height;
+        if(imageData.width == 0 || imageData.width == 0)
+        {
+            glyph.size.x = 1;
+            glyph.size.y = 1;
+            glyph.bearing.x = 0;
+            glyph.bearing.y = 0;
+            imageData.width = 1;
+            imageData.height = 1;
+            imageData.resourceData.size = sizeof(uint8);
+            imageData.resourceData.data = &transparentPixel;
+        }
+        glyph.texture = graphics->createTexture2D(imageData);
+    }
+    FT_Done_Face(face);
+    FT_Done_FreeType(ft);
+    asset->setStatus(Asset::Status::Ready);
 }