e223be2571
实测链路（全绿）： 1. 官方 ProGuard 映射 → SRG → SpecialSource 重映射 → client-named.jar 2. 反编译确认 MC 渲染器挂在 Minecraft 单例上，不能独立 new 3. 权威序列：tryDetectVersion → Bootstrap → RenderSystem → new Minecraft(cfg) 4. 渲 3 帧 + glReadPixels → PNG，画面是 Mojang 加载屏（真渲染，非清屏） 三个坑（实测证据）： - 漏 tryDetectVersion → Game version not set - FolderData 参数顺序错 → icons/ 404 - assetIndex 用 id(5) 而非落盘名(1.20.1) → 资源全找不到 下一步：ClientLevel 构造只需 listener.registryAccess()， ClientChunkCache.replaceWithPacketData 接收 map_chunk 原始字节 （与 chunk.py 同格式）⇒ 这就是数据喂渲染器的落点。
106 lines
4.6 KiB
Java
106 lines
4.6 KiB
Java
import com.mojang.blaze3d.pipeline.MainTarget;
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import com.mojang.blaze3d.platform.DisplayData;
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import com.mojang.blaze3d.systems.RenderSystem;
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import com.mojang.authlib.properties.PropertyMap;
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import net.minecraft.SharedConstants;
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import net.minecraft.client.Minecraft;
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import net.minecraft.client.User;
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import net.minecraft.client.main.GameConfig;
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import net.minecraft.server.Bootstrap;
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import org.lwjgl.glfw.GLFW;
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import org.lwjgl.opengl.GL11;
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import javax.imageio.ImageIO;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.net.Proxy;
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import java.nio.ByteBuffer;
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import java.util.Optional;
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import java.util.OptionalInt;
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/**
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* mcfold render probe —— 起 MC 渲染栈，渲一帧，读像素写 PNG。
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* 全程：不连服、不登录、不进主循环、不 gameplay。
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*/
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public class RenderProbe {
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public static void main(String[] args) throws Exception {
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String gameDir = arg(args, "--gameDir", "/home/newqqagent/mcview/instances/default");
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String assets = arg(args, "--assets", "/home/newqqagent/mcview/store/vanilla-1.20.1/assets");
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String assetIdx = arg(args, "--assetIndex", "1.20.1");
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String out = arg(args, "--out", "/tmp/scaffold-frame.png");
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int width = Integer.parseInt(arg(args, "--width", "854"));
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int height = Integer.parseInt(arg(args, "--height", "480"));
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SharedConstants.tryDetectVersion();
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SharedConstants.enableDataFixerOptimizations();
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Bootstrap.bootStrap();
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File runDir = new File(gameDir);
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User user = new User("mcfold_cam", "0".repeat(32), "mcfold_cam",
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Optional.empty(), Optional.empty(), User.Type.LEGACY);
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PropertyMap props = new PropertyMap();
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GameConfig cfg = new GameConfig(
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new GameConfig.UserData(user, props, props, Proxy.NO_PROXY),
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new DisplayData(width, height, OptionalInt.empty(), OptionalInt.empty(), false),
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new GameConfig.FolderData(runDir, new File(runDir, "resourcepacks"), new File(assets), assetIdx),
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new GameConfig.GameData(false, "mcfold", "release", false, false),
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new GameConfig.QuickPlayData(null, null, null, null)
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);
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RenderSystem.initRenderThread();
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RenderSystem.beginInitialization();
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Minecraft mc = new Minecraft(cfg);
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RenderSystem.finishInitialization();
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System.out.println("[probe] constructed. w=" + mc.getWindow().getWidth()
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+ " h=" + mc.getWindow().getHeight());
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// ★ 渲染一帧：照抄 Minecraft.render() 的实测序列（反编译 nout2/.../Minecraft.java:1110-1140）
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MainTarget target = (MainTarget) mc.getMainRenderTarget();
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for (int frame = 0; frame < 3; frame++) {
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RenderSystem.clear(16640, Minecraft.ON_OSX);
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target.bindWrite(true);
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mc.gameRenderer.render(0.0F, 0L, true);
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target.unbindWrite();
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target.blitToScreen(mc.getWindow().getWidth(), mc.getWindow().getHeight());
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mc.getWindow().updateDisplay();
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System.out.println("[probe] frame " + frame + " rendered");
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}
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// ★ 读像素：从 GL 后台缓冲直接读（比截屏更可靠，且不依赖 X）
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GL11.glReadBuffer(GL11.GL_BACK);
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int w = mc.getWindow().getWidth(), h = mc.getWindow().getHeight();
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ByteBuffer buf = org.lwjgl.BufferUtils.createByteBuffer(w * h * 4);
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GL11.glReadPixels(0, 0, w, h, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buf);
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BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
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// GL 原点在左下，PNG 在左上，需翻转
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for (int y = 0; y < h; y++) {
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for (int x = 0; x < w; x++) {
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int i = ((h - 1 - y) * w + x) * 4;
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int r = buf.get(i) & 0xFF, g = buf.get(i + 1) & 0xFF, b = buf.get(i + 2) & 0xFF;
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img.setRGB(x, y, (r << 16) | (g << 8) | b);
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}
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}
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ImageIO.write(img, "png", new File(out));
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System.out.println("[probe] wrote " + out + " (" + w + "x" + h + ")");
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// 统计非黑像素，证明真的画了东西（而非空缓冲）
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long nonBlack = 0; int total = w * h;
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for (int p : img.getRGB(0, 0, w, h, null, 0, w)) if ((p & 0xFFFFFF) != 0) nonBlack++;
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System.out.println("[probe] non-black pixels = " + nonBlack + "/" + total
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+ " (" + (100.0 * nonBlack / total) + "%)");
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GLFW.glfwTerminate();
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System.out.println("[probe] DONE");
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System.exit(0);
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}
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private static String arg(String[] a, String key, String def) {
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for (int i = 0; i < a.length - 1; i++) if (a[i].equals(key)) return a[i + 1];
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return def;
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}
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}
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