Allow custom resolution for all video rendering modes

Remove tiled rendering
Choose different rendering strategy based on video size and framebuffer support
Make size of video writer queue configurable via system properties

src/main/java/eu/crushedpixel/replaymod/utils/OpenGLUtils.java

@@ -0,0 +1,41 @@
+package eu.crushedpixel.replaymod.utils;
+
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.GL11;
+
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBufferInt;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+
+public class OpenGLUtils {
+    public static final int VIEWPORT_MAX_WIDTH;
+    public static final int VIEWPORT_MAX_HEIGHT;
+
+    static {
+        IntBuffer buffer = BufferUtils.createIntBuffer(16);
+        GL11.glGetInteger(GL11.GL_MAX_VIEWPORT_DIMS, buffer);
+        VIEWPORT_MAX_WIDTH = buffer.get();
+        VIEWPORT_MAX_HEIGHT = buffer.get();
+    }
+
+    public static void openGlBytesToBufferedImage(ByteBuffer buffer, int bufferWidth, BufferedImage image, int offsetX, int offsetY) {
+        int[] pixels = ((DataBufferInt) image.getRaster().getDataBuffer()).getData();
+        int imageWidth = image.getWidth();
+        int bufferSize = buffer.remaining() / 3;
+        // Read the OpenGL image row by row from right to left (flipped horizontally)
+        for (int i = bufferSize - 1; i >= 0; i--) {
+            // Coordinates in the final image
+            int x = offsetX + bufferWidth - i % bufferWidth - 1; // X coord of OpenGL image has to be flipped first
+            int y = offsetY + i / bufferWidth;
+            if (x >= imageWidth || y * imageWidth >= pixels.length) {
+                buffer.position(buffer.position() + 3); // Pixel would end up outside of image
+                continue;
+            }
+            // Write to image (row by row, left to right)
+            pixels[y * imageWidth + x] = 0xff << 24 | (buffer.get() & 0xff) << 16 | (buffer.get() & 0xff) << 8 | buffer.get() & 0xff;
+        }
+        buffer.rewind();
+    }
+
+}