From 7f8b3e8786fc168aa7a9e9540db8d466ac06a442 Mon Sep 17 00:00:00 2001
From: Speiger <Speiger@gmx.net>
Date: Sat, 20 Jul 2024 20:11:06 +0200
Subject: [PATCH] Start on true type fonts

---
 .../rendering/gui/font/FontTexture.java       |  1 +
 .../font/providers/STBTrueTypeProvider.java   | 42 +++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 src/main/java/speiger/src/coreengine/rendering/gui/font/providers/STBTrueTypeProvider.java

diff --git a/src/main/java/speiger/src/coreengine/rendering/gui/font/FontTexture.java b/src/main/java/speiger/src/coreengine/rendering/gui/font/FontTexture.java
index fc1eef9..7c47de5 100644
--- a/src/main/java/speiger/src/coreengine/rendering/gui/font/FontTexture.java
+++ b/src/main/java/speiger/src/coreengine/rendering/gui/font/FontTexture.java
@@ -19,6 +19,7 @@ public class FontTexture extends BaseTexture {
 	
 	@Override
 	public void load(IAssetProvider provider) {
+		//TODO use old texture system instead
 		GL45.glTextureStorage2D(id, 1, GLTextureFormat.RGBA.glValue(), bounds, bounds);
 	}
 	
diff --git a/src/main/java/speiger/src/coreengine/rendering/gui/font/providers/STBTrueTypeProvider.java b/src/main/java/speiger/src/coreengine/rendering/gui/font/providers/STBTrueTypeProvider.java
new file mode 100644
index 0000000..cc66512
--- /dev/null
+++ b/src/main/java/speiger/src/coreengine/rendering/gui/font/providers/STBTrueTypeProvider.java
@@ -0,0 +1,42 @@
+package speiger.src.coreengine.rendering.gui.font.providers;
+
+import org.lwjgl.stb.STBTTFontinfo;
+import org.lwjgl.stb.STBTruetype;
+
+import speiger.src.collections.ints.sets.IntSet;
+import speiger.src.coreengine.rendering.gui.font.glyth.GlythData;
+
+public class STBTrueTypeProvider implements IFontProvider {
+	long data;
+	STBTTFontinfo info;
+	IntSet skip;
+	float oversample;
+	float xOff;
+	float yOff;
+	float pointScale;
+	float ascent;
+	
+	public STBTrueTypeProvider(long data, STBTTFontinfo info, float size, float oversample, float xOff, float yOff, String skip) {
+		this.data = data;
+		this.info = info;
+		skip.codePoints().forEach(this.skip::add);
+		this.oversample = oversample;
+		this.xOff = xOff;
+		this.yOff = yOff;
+		pointScale = STBTruetype.stbtt_ScaleForPixelHeight(info, size * oversample);
+		int[] ascent = new int[1];
+		STBTruetype.stbtt_GetFontVMetrics(info, ascent, new int[1], new int[1]);
+		this.ascent = pointScale * ascent[0];
+	}
+
+	@Override
+	public GlythData glythData(int codepoint) {
+		return null;
+	}
+
+	@Override
+	public void close() {
+		
+	}
+	
+}