Added Video Export feature with according Options in the Options Menu

Fixed Linear Interpolation

src/main/java/eu/crushedpixel/replaymod/video/ScreenCapture.java

@@ -0,0 +1,85 @@
+package eu.crushedpixel.replaymod.video;
+
+import java.awt.AWTException;
+import java.awt.Rectangle;
+import java.awt.Robot;
+import java.awt.image.BufferedImage;
+import java.nio.IntBuffer;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.renderer.OpenGlHelper;
+import net.minecraft.client.renderer.texture.TextureUtil;
+import net.minecraft.client.shader.Framebuffer;
+
+import org.lwjgl.BufferUtils;
+import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL12;
+import org.monte.screenrecorder.ScreenRecorder;
+
+public class ScreenCapture {
+
+	private static final Minecraft mc = Minecraft.getMinecraft();
+	
+	private static IntBuffer pixelBuffer;
+	private static int[] pixelValues;
+	
+	public static BufferedImage captureScreen() {
+		int width = mc.displayWidth;
+		int height = mc.displayHeight;
+
+		Framebuffer buffer = mc.getFramebuffer();
+		
+		if (OpenGlHelper.isFramebufferEnabled())
+		{
+			width = buffer.framebufferTextureWidth;
+			height = buffer.framebufferTextureHeight;
+		}
+
+		int k = width * height;
+
+		if (pixelBuffer == null || pixelBuffer.capacity() < k)
+		{
+			pixelBuffer = BufferUtils.createIntBuffer(k);
+			pixelValues = new int[k];
+		}
+
+		GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1);
+		GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1);
+		pixelBuffer.clear();
+
+		if (OpenGlHelper.isFramebufferEnabled()) {
+			GlStateManager.bindTexture(buffer.framebufferTexture);
+			GL11.glGetTexImage(GL11.GL_TEXTURE_2D, 0, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, pixelBuffer);
+		}
+		else {
+			GL11.glReadPixels(0, 0, width, height, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, pixelBuffer);
+		}
+
+		pixelBuffer.get(pixelValues);
+		TextureUtil.processPixelValues(pixelValues, width, height);
+		BufferedImage bufferedimage = null;
+
+
+		if (OpenGlHelper.isFramebufferEnabled())
+		{
+			bufferedimage = new BufferedImage(buffer.framebufferWidth, buffer.framebufferHeight, 1);
+			int l = buffer.framebufferTextureHeight - buffer.framebufferHeight;
+
+			for (int i1 = l; i1 < buffer.framebufferTextureHeight; ++i1)
+			{
+				for (int j1 = 0; j1 < buffer.framebufferWidth; ++j1)
+				{
+					bufferedimage.setRGB(j1, i1 - l, pixelValues[i1 * buffer.framebufferTextureWidth + j1]);
+				}
+			}
+		}
+		else {	 
+			bufferedimage = new BufferedImage(width, height, 1);
+			bufferedimage.setRGB(0, 0, width, height, pixelValues, 0, width);
+		}
+		
+		
+		return bufferedimage;
+	}
+}