Test offset window

flutter-ui/src/main/java/com/primogemstudio/advancedfmk/flutter/FlutterNative.java

@@ -6,7 +6,7 @@
 
 public final class FlutterNative {
     static {
-        System.load("D:/engine/src/out/host_release/flutter_minecraft.dll");
+        System.load("/home/coder2/flutter/engine_build/test/src/out/host_release/libflutter_minecraft.so");
     }
 
     static Cleaner cleaner = Cleaner.create();

flutter-ui/src/main/java/com/primogemstudio/advancedfmk/flutter/Rect.java

@@ -12,4 +12,9 @@ public Rect(int left, int top, int right, int bottom) {
 
     public Rect() {
     }
+
+    @Override
+    public String toString() {
+        return left + " " + top + " " + right + " " + bottom;
+    }
 }

flutter-ui/src/main/java/com/primogemstudio/advancedfmk/flutter/ViewEvent.java

@@ -5,8 +5,8 @@
 public class ViewEvent {
     public static void resize(int width, int height) {
         instances.forEach(i -> {
-            i.rect.top = height - i.height;
-            i.rect.bottom = height;
+            i.rect.top = height - i.height - 100;
+            i.rect.bottom = height - 100;
         });
     }
 }

flutter-ui/src/main/java/com/primogemstudio/advancedfmk/mixin/RenderSystemMixin.java

@@ -2,14 +2,14 @@
 
 import com.mojang.blaze3d.platform.GlStateManager;
 import com.mojang.blaze3d.systems.RenderSystem;
-import com.mojang.blaze3d.vertex.BufferBuilder;
-import com.mojang.blaze3d.vertex.BufferUploader;
-import com.mojang.blaze3d.vertex.DefaultVertexFormat;
-import com.mojang.blaze3d.vertex.VertexFormat;
+import com.mojang.blaze3d.vertex.*;
 import com.primogemstudio.advancedfmk.flutter.FlutterInstance;
 import com.primogemstudio.advancedfmk.flutter.Rect;
 import com.primogemstudio.advancedfmk.flutter.Shaders;
 import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.renderer.GameRenderer;
+import org.joml.Matrix4f;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
@@ -23,21 +23,26 @@ public abstract class RenderSystemMixin {
 
     @Inject(method = "flipFrame", at = @At(value = "INVOKE", target = "Lorg/lwjgl/glfw/GLFW;glfwSwapBuffers(J)V"), remap = false)
     private static void flipFrame(long l, CallbackInfo ci) {
+        var window = Minecraft.getInstance().getWindow();
         if (instance == null) {
-            var window = Minecraft.getInstance().getWindow();
-            instance = new FlutterInstance("F:/Else Language/Dart/flutter-starrail/build/app", new Rect(0, window.getHeight() - 600, 800, window.getHeight()), 800, 600);
+            instance = new FlutterInstance("/home/coder2/flutter/flutter_demo/build/linux/x64/release/bundle/data/flutter_assets", new Rect(0, window.getHeight() - 600 - 100, 800, window.getHeight() - 100), 800, 600);
         }
         instance.pollEvents();
-        blit(800, 600);
+        var rect = instance.rect;
+        blit(rect.left, window.getHeight() - rect.bottom, rect.right - rect.left, rect.bottom - rect.top);
     }
 
     @Unique
-    private static void blit(int width, int height) {
+    private static void blit(int x, int y, int width, int height) {
+        var w = Minecraft.getInstance().getWindow().getWidth();
+        var h = Minecraft.getInstance().getWindow().getHeight();
         GlStateManager._colorMask(true, true, true, false);
         GlStateManager._disableDepthTest();
         GlStateManager._depthMask(false);
-        GlStateManager._viewport(0, 0, width, height);
+        GlStateManager._viewport(x, y, width, height);
+        GlStateManager._enableBlend();
         var shader = Shaders.BLIT_NO_FLIP;
+        shader.getUniform("PositionOffset").set((float) (x / w), (float) (y / h));
         shader.setSampler("DiffuseSampler", instance.getTexture());
         shader.apply();
         BufferBuilder buff = RenderSystem.renderThreadTesselator().begin(VertexFormat.Mode.QUADS, DefaultVertexFormat.BLIT_SCREEN);

flutter-ui/src/main/resources/assets/minecraft/shaders/core/blit_no_flip.json

@@ -7,5 +7,6 @@
     }
   ],
   "uniforms": [
+    { "name": "PositionOffset", "type": "float", "count": 2, "values": [ 0.0, 0.0 ] }
   ]
 }

flutter-ui/src/main/resources/assets/minecraft/shaders/core/blit_no_flip.vsh

@@ -4,8 +4,10 @@ in vec3 Position;
 
 out vec2 texCoord;
 
+uniform vec2 PositionOffset;
+
 void main() {
-    vec2 screenPos = Position.xy * 2.0 - 1.0;
+    vec2 screenPos = Position.xy * 2.0 - 1.0 + PositionOffset;
     gl_Position = vec4(screenPos.x, screenPos.y, 1.0, 1.0);
     texCoord = vec2(Position.x, 1 - Position.y);
 }