From 180aad05decc7eefa87e4e45d6747c48f40e5361 Mon Sep 17 00:00:00 2001
From: Tyler Murphy <tylerm@tylerm.dev>
Date: Mon, 17 Apr 2023 12:12:01 -0400
Subject: save

---
 .../tylermurphy/Minecraft/Render/FontRenderer.java | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100755 src/main/java/net/tylermurphy/Minecraft/Render/FontRenderer.java

(limited to 'src/main/java/net/tylermurphy/Minecraft/Render/FontRenderer.java')

diff --git a/src/main/java/net/tylermurphy/Minecraft/Render/FontRenderer.java b/src/main/java/net/tylermurphy/Minecraft/Render/FontRenderer.java
new file mode 100755
index 0000000..ed17824
--- /dev/null
+++ b/src/main/java/net/tylermurphy/Minecraft/Render/FontRenderer.java
@@ -0,0 +1,101 @@
+package net.tylermurphy.Minecraft.Render;
+
+import java.util.List;
+
+import java.util.Map;
+
+import net.tylermurphy.Minecraft.Render.Data.Mesh;
+import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL13;
+import org.lwjgl.opengl.GL20;
+import org.lwjgl.opengl.GL30;
+import org.joml.Matrix4f;
+import org.joml.Vector2f;
+import org.joml.Vector4f;
+
+import net.tylermurphy.Minecraft.Render.Shaders.FontShader;
+import net.tylermurphy.Minecraft.Render.Shaders.QuadShader;
+import net.tylermurphy.Minecraft.UI.UIFont;
+import net.tylermurphy.Minecraft.UI.UIText;
+import net.tylermurphy.Minecraft.Util.Maths;
+
+public class FontRenderer {
+
+	private final Mesh quad;
+	private final FontShader fontShader;
+	private final QuadShader quadShader;
+
+	public FontRenderer() {
+		float[] positions = {-1, 1, -1, -1, 1, 1, 1, -1};
+		quad = new Mesh(positions.length/2).store(positions, 2).finish();
+		fontShader = new FontShader();
+		quadShader = new QuadShader();
+	}
+	
+	public void render(Map<UIFont, List<UIText>> texts){
+		for(UIFont font : texts.keySet()){
+			for(UIText text : texts.get(font)){
+				renderQuad(text);
+			}
+		}
+		prepare();
+		for(UIFont font : texts.keySet()){
+			GL13.glActiveTexture(GL13.GL_TEXTURE0);
+			GL11.glBindTexture(GL11.GL_TEXTURE_2D, font.getTextureAtlas());
+			for(UIText text : texts.get(font)){
+				renderText(text);
+			}
+		}
+		endRendering();
+	}
+
+	public void cleanUp(){
+		fontShader.cleanUp();
+		quadShader.cleanUp();
+	}
+	
+	private void prepare(){
+		GL11.glEnable(GL11.GL_BLEND);
+		GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
+		GL11.glDisable(GL11.GL_DEPTH_TEST);
+		fontShader.start();
+	}
+	
+	private void renderText(UIText text){
+		GL30.glBindVertexArray(text.getMesh());
+		GL20.glEnableVertexAttribArray(0);
+		GL20.glEnableVertexAttribArray(1);
+		fontShader.loadColor(text.getColour());
+		fontShader.loadTranslation(text.getConvertedPosition());
+		GL11.glDrawArrays(GL11.GL_TRIANGLES, 0, text.getVertexCount());
+		GL20.glDisableVertexAttribArray(0);
+		GL20.glDisableVertexAttribArray(1);
+		GL30.glBindVertexArray(0);
+	}
+	
+	private void renderQuad(UIText text) {
+		quadShader.start();
+		GL30.glBindVertexArray(quad.getID());
+		GL20.glEnableVertexAttribArray(0);
+		GL11.glEnable(GL11.GL_BLEND);
+		GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
+		GL11.glDisable(GL11.GL_DEPTH_TEST);
+		Matrix4f matrix = Maths.createTransformationMatrix(new Vector2f(text.getStretchBackdrop() ? -1 : text.getConvertedPosition().x*2-1,(1-text.getConvertedPosition().y-.0125f*text.getFontSize()-.0025f)*2-1), new Vector2f(text.getStretchBackdrop() ? 2 : (float) text.getMaxX()*2,.025f*text.getFontSize()));
+		quadShader.loadTransformation(matrix);
+		quadShader.loadColor(new Vector4f(150/255f,150/255f,150/255f,.5f));
+		GL11.glDrawArrays(GL11.GL_TRIANGLE_STRIP, 0, quad.getVertexCount());
+		GL11.glEnable(GL11.GL_DEPTH_TEST);
+		GL20.glDisableVertexAttribArray(0);
+		GL30.glBindVertexArray(0);
+		quadShader.stop();
+		GL11.glDisable(GL11.GL_BLEND);
+		GL11.glEnable(GL11.GL_DEPTH_TEST);
+	}
+	
+	private void endRendering(){
+		fontShader.stop();
+		GL11.glDisable(GL11.GL_BLEND);
+		GL11.glEnable(GL11.GL_DEPTH_TEST);
+	}
+
+}
-- 
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