Add .blend export

src/main/java/com/replaymod/render/blend/BlendFrameCapturer.java

@@ -0,0 +1,48 @@
+package com.replaymod.render.blend;
+
+import com.replaymod.render.capturer.RenderInfo;
+import com.replaymod.render.capturer.WorldRenderer;
+import com.replaymod.render.frame.RGBFrame;
+import com.replaymod.render.rendering.FrameCapturer;
+import com.replaymod.render.utils.ByteBufferPool;
+import net.minecraft.client.Minecraft;
+import org.lwjgl.util.Dimension;
+
+import java.io.IOException;
+
+public class BlendFrameCapturer implements FrameCapturer<RGBFrame> {
+    protected final WorldRenderer worldRenderer;
+    protected final RenderInfo renderInfo;
+    protected int framesDone;
+
+    public BlendFrameCapturer(WorldRenderer worldRenderer, RenderInfo renderInfo) {
+        this.worldRenderer = worldRenderer;
+        this.renderInfo = renderInfo;
+    }
+
+    @Override
+    public boolean isDone() {
+        return framesDone >= renderInfo.getTotalFrames();
+    }
+
+    @Override
+    public RGBFrame process() {
+        if (framesDone == 0) {
+            BlendState.getState().setup();
+        }
+
+        renderInfo.updateForNextFrame();
+
+        BlendState.getState().preFrame(framesDone);
+        worldRenderer.renderWorld(Minecraft.getMinecraft().timer.renderPartialTicks, null);
+        BlendState.getState().postFrame(framesDone);
+
+        return new RGBFrame(framesDone++, new Dimension(0, 0), ByteBufferPool.allocate(0));
+    }
+
+    @Override
+    public void close() throws IOException {
+        BlendState.getState().tearDown();
+        BlendState.setState(null);
+    }
+}