Added the option of creating legacy OpenGL contexts

plutostatic/src/main/java/cz/tefek/pluto/engine/buffer/BufferHelper.java

@@ -3,11 +3,15 @@ package cz.tefek.pluto.engine.buffer;
 import org.apache.commons.io.IOUtils;
 import org.lwjgl.BufferUtils;
 
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.nio.FloatBuffer;
 import java.nio.IntBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import cz.tefek.pluto.io.asl.resource.ResourceAddress;
 
 /**
  * A utility class to handle primitive native buffers.
@@ -110,9 +114,83 @@ public final class BufferHelper
      */
     public static ByteBuffer readToFlippedByteBuffer(String path) throws IOException
     {
-        try (var fis = new FileInputStream(path))
+        try (var fc = FileChannel.open(Path.of(path)))
         {
-            var ba = IOUtils.toByteArray(fis);
+            var size = fc.size();
+
+            if (size > Integer.MAX_VALUE)
+            {
+                throw new IOException("File ' + pah + ' is too big to be read into a ByteBuffer!");
+            }
+
+            ByteBuffer buf = BufferUtils.createByteBuffer((int) size);
+            fc.read(buf);
+            buf.flip();
+            return buf;
+        }
+    }
+
+    /**
+     * Loads a file denoted by the specified {@link Path} and fills the input
+     * {@link ByteBuffer} with the read bytes.
+     * 
+     * <p>
+     * <em>Make sure the buffer can hold the entire file.</em>
+     * </p>
+     * 
+     * @param path The file's path.
+     * @param buf The input buffer to be filled with data.
+     * 
+     * @return The input {@link ByteBuffer}.
+     * @throws IOException Upon standard I/O errors.
+     * 
+     * @author 493msi
+     * @since 0.3
+     */
+    public static ByteBuffer readToByteBuffer(Path path, ByteBuffer buf) throws IOException
+    {
+        try (var fc = FileChannel.open(path))
+        {
+            fc.read(buf);
+            buf.flip();
+            return buf;
+        }
+    }
+
+    /**
+     * {@link ResourceAddress} version of
+     * {@link BufferHelper#readToByteBuffer(Path path, ByteBuffer buf)}.
+     * 
+     * @param addr The file's {@link ResourceAddress}.
+     * @param buf The input buffer to be filled with data.
+     * 
+     * @return The input {@link ByteBuffer}.
+     * @throws IOException Upon standard I/O errors.
+     * 
+     * @author 493msi
+     * @since 0.3
+     */
+    public static ByteBuffer readToByteBuffer(ResourceAddress addr, ByteBuffer buf) throws IOException
+    {
+        return readToByteBuffer(addr.toNIOPath(), buf);
+    }
+
+    /**
+     * Loads a file denoted by the specified {@link ResourceAddress} and returns
+     * a {@link ByteBuffer} containing the read bytes.
+     * 
+     * @param path The file's path.
+     * @return A {@link ByteBuffer} containing the file's contents.
+     * @throws IOException Upon standard I/O errors.
+     * 
+     * @author 493msi
+     * @since 0.3
+     */
+    public static ByteBuffer readToFlippedByteBuffer(ResourceAddress path) throws IOException
+    {
+        try (var is = Files.newInputStream(path.toNIOPath()))
+        {
+            var ba = IOUtils.toByteArray(is);
             return flippedByteBuffer(ba);
         }
     }

plutostatic/src/main/java/cz/tefek/pluto/engine/display/Display.java

@@ -27,6 +27,7 @@ public class Display
     int width;
     int height;
     boolean debugMode;
+    boolean coreProfile = true;
 
     private boolean wasResized;
 
@@ -190,7 +191,7 @@ public class Display
 
     public void createOpenGLCapabilities()
     {
-        var glCapabilities = GL.createCapabilities(true);
+        var glCapabilities = GL.createCapabilities(this.coreProfile);
 
         GLDebugInfo.printDebugInfo(glCapabilities);
 

plutostatic/src/main/java/cz/tefek/pluto/engine/display/DisplayBuilder.java

@@ -50,11 +50,26 @@ public class DisplayBuilder
 
     public DisplayBuilder hintOpenGLVersion(int major, int minor)
     {
+        GLFW.glfwWindowHint(GLFW.GLFW_CLIENT_API, GLFW.GLFW_OPENGL_API);
         GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MAJOR, major);
         GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, minor);
         GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_FORWARD_COMPAT, GLFW.GLFW_TRUE);
         GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_PROFILE, GLFW.GLFW_OPENGL_CORE_PROFILE);
 
+        this.display.coreProfile = true;
+
+        return this;
+    }
+
+    public DisplayBuilder hintOpenGLVersionLegacy(int major, int minor)
+    {
+        GLFW.glfwWindowHint(GLFW.GLFW_CLIENT_API, GLFW.GLFW_OPENGL_API);
+        GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_PROFILE, GLFW.GLFW_OPENGL_ANY_PROFILE);
+        GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MAJOR, major);
+        GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, minor);
+
+        this.display.coreProfile = false;
+
         return this;
     }
 

plutostatic/src/main/java/cz/tefek/pluto/engine/math/ViewMatrix.java

@@ -11,10 +11,10 @@ import org.joml.Matrix3x2f;
 public class ViewMatrix
 {
     /**
-     * Create a 2D
+     * Create a 2D view matrix.
      * 
-     * @param x    The X camera translation
+     * @param x The X camera translation
-     * @param y    The Y camera translation
+     * @param y The Y camera translation
      * @param zoom The zoom
      * 
      * @return the view matrix