1 files changed, 113 insertions, 0 deletions
diff --git a/src/main/java/net/tylermurphy/Minecraft/Render/Data/Texture.java b/src/main/java/net/tylermurphy/Minecraft/Render/Data/Texture.java
new file mode 100755
index 0000000..edfce82
--- /dev/null
+++ b/src/main/java/net/tylermurphy/Minecraft/Render/Data/Texture.java
@@ -0,0 +1,113 @@
+package net.tylermurphy.Minecraft.Render.Data;
+
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.lwjgl.opengl.GL30.*;
+
+import org.lwjgl.opengl.EXTTextureFilterAnisotropic;
+import org.lwjgl.opengl.GL;
+import org.lwjgl.stb.STBImage;
+import org.lwjgl.system.MemoryStack;
+
+import net.tylermurphy.Minecraft.Util.Constants;
+
+public class Texture {
+	
+    public ByteBuffer getImage() {
+        return image;
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    private ByteBuffer image;
+    private int width, height;
+
+    private static List<Integer> ids = new ArrayList<Integer>();
+    
+    Texture(int width, int heigh, ByteBuffer image) {
+        this.image = image;
+        this.height = heigh;
+        this.width = width;
+    }
+    
+    public static Texture loadRawTextureData(String fileName) {
+        ByteBuffer image;
+        int width, height;
+        try (MemoryStack stack = MemoryStack.stackPush()) {
+            IntBuffer comp = stack.mallocInt(1);
+            IntBuffer w = stack.mallocInt(1);
+            IntBuffer h = stack.mallocInt(1);
+            image = STBImage.stbi_load(Constants.PNG_LOCATION + fileName + ".png", w, h, comp, 4);
+            if (image == null) {
+                System.err.println("Couldn't load " + Constants.PNG_LOCATION + fileName + ".png");
+            }
+            width = w.get();
+            height = h.get();
+            return new Texture(width, height, image);
+        }
+    }
+    
+    private static int loadImage(String fileName) {
+    	int id = glGenTextures();
+    	Texture image = loadRawTextureData(fileName);
+    	glActiveTexture(GL_TEXTURE0);
+    	glBindTexture(GL_TEXTURE_2D, id);
+    	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image.getWidth(), image.getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, image.getImage());
+        glGenerateMipmap(GL_TEXTURE_2D);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, -1);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		glBindTexture(GL_TEXTURE_2D, 0);
+		ids.add(id);
+		return id;
+    }
+    
+    public static int loadTexture(String fileName) {
+    	return loadImage(fileName);
+    }
+    
+    public static int loadFontAtlas(String fileName) {
+    	return loadImage(fileName);
+    }
+    
+    public static int loadTexture2DArray(HashMap<Integer, Texture> textures){
+        int id = glGenTextures();
+        glActiveTexture(GL_TEXTURE0);
+        glBindTexture(GL_TEXTURE_2D, id);
+        glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_REPEAT);
+        glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_REPEAT);
+        if (GL.getCapabilities().GL_EXT_texture_filter_anisotropic) {
+            float maxAnisotropy = glGetFloat(EXTTextureFilterAnisotropic.GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT);
+            glTexParameterf(GL_TEXTURE_2D_ARRAY, EXTTextureFilterAnisotropic.GL_TEXTURE_MAX_ANISOTROPY_EXT, maxAnisotropy);
+        }
+        glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA, textures.get(0).width, textures.get(0).height, textures.values().size(), 0, GL_RGBA, GL_UNSIGNED_BYTE, (ByteBuffer) null);
+        for(Map.Entry<Integer, Texture> entry : textures.entrySet()){
+            glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, entry.getKey(), entry.getValue().width, entry.getValue().height, 1, GL_RGBA, GL_UNSIGNED_BYTE, entry.getValue().getImage());
+        }
+        glGenerateMipmap(GL_TEXTURE_2D_ARRAY);
+        glBindTexture(GL_TEXTURE_2D_ARRAY, 0);
+        ids.add(id);
+        return id;
+    }
+    
+    public static void cleanUp(){
+		for(int id:ids){
+			glDeleteTextures(id);
+            glActiveTexture(GL_TEXTURE0);
+            glBindTexture(GL_TEXTURE_2D_ARRAY, id);
+		}
+	}
+}
+\ No newline at end of file