very very _very_ iritated with iris atm

src/main/java/me/cortex/voxy/client/core/VoxyRenderSystem.java

@@ -151,7 +151,8 @@ public class VoxyRenderSystem {
 
 
     public Viewport<?> setupViewport(ChunkRenderMatrices matrices, FogParameters fogParameters, double cameraX, double cameraY, double cameraZ) {
-        if (IrisUtil.irisShadowActive()) {
+        var viewport = this.getViewport();
+        if (viewport == null) {
             return null;
         }
 
@@ -170,7 +171,6 @@ public class VoxyRenderSystem {
         int[] dims = new int[4];
         glGetIntegerv(GL_VIEWPORT, dims);
 
-        var viewport = this.getViewport();
         viewport
                 .setVanillaProjection(matrices.projection())
                 .setProjection(projection)
@@ -354,6 +354,9 @@ public class VoxyRenderSystem {
     }
 
     public Viewport<?> getViewport() {
+        if (IrisUtil.irisShadowActive()) {
+            return null;
+        }
         return this.viewportSelector.getViewport();
     }
 

src/main/java/me/cortex/voxy/client/core/util/IrisUtil.java

@@ -1,10 +1,23 @@
 package me.cortex.voxy.client.core.util;
 
+import me.cortex.voxy.client.core.VoxyRenderSystem;
+import me.cortex.voxy.client.core.rendering.Viewport;
+import net.caffeinemc.mods.sodium.client.render.chunk.ChunkRenderMatrices;
+import net.caffeinemc.mods.sodium.client.util.FogParameters;
 import net.fabricmc.loader.api.FabricLoader;
+import net.irisshaders.iris.Iris;
 import net.irisshaders.iris.gl.IrisRenderSystem;
 import net.irisshaders.iris.shadows.ShadowRenderer;
 
 public class IrisUtil {
+    public record CapturedViewportParameters(ChunkRenderMatrices matrices, FogParameters parameters, double x, double y, double z) {
+        public Viewport<?> apply(VoxyRenderSystem vrs) {
+            return vrs.setupViewport(this.matrices, this.parameters, this.x, this.y, this.z);
+        }
+    }
+
+    public static CapturedViewportParameters CAPTURED_VIEWPORT_PARAMETERS;
+
     public static final boolean IRIS_INSTALLED = FabricLoader.getInstance().isModLoaded("iris");
     public static final boolean SHADER_SUPPORT = System.getProperty("voxy.enableExperimentalIrisPipeline", "false").equalsIgnoreCase("true");
 
@@ -26,4 +39,12 @@ public class IrisUtil {
             IrisRenderSystem.bindSamplerToUnit(i, 0);
         }
     }
+
+    private static boolean irisShaderPackEnabled0() {
+        return Iris.isPackInUseQuick();
+    }
+
+    public static boolean irisShaderPackEnabled() {
+        return IRIS_INSTALLED && irisShaderPackEnabled0();
+    }
 }

src/main/java/me/cortex/voxy/client/mixin/iris/MixinIrisRenderingPipeline.java

@@ -1,5 +1,6 @@
 package me.cortex.voxy.client.mixin.iris;
 
+import me.cortex.voxy.client.core.IGetVoxyRenderSystem;
 import me.cortex.voxy.client.core.util.IrisUtil;
 import me.cortex.voxy.client.iris.IGetIrisVoxyPipelineData;
 import me.cortex.voxy.client.iris.IGetVoxyPatchData;
@@ -9,6 +10,7 @@ import net.irisshaders.iris.gl.buffer.ShaderStorageBufferHolder;
 import net.irisshaders.iris.pipeline.IrisRenderingPipeline;
 import net.irisshaders.iris.shaderpack.programs.ProgramSet;
 import net.irisshaders.iris.uniforms.custom.CustomUniforms;
+import net.minecraft.client.MinecraftClient;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
@@ -39,6 +41,16 @@ public class MixinIrisRenderingPipeline implements IGetVoxyPatchData, IGetIrisVo
         }
     }
 
+    @Inject(method = "beginLevelRendering", at = @At(value = "INVOKE", target = "Lcom/mojang/blaze3d/opengl/GlStateManager;_activeTexture(I)V", shift = At.Shift.BEFORE), remap = true)
+    private void voxy$injectViewportSetup(CallbackInfo ci) {
+        if (IrisUtil.CAPTURED_VIEWPORT_PARAMETERS != null) {
+            var renderer = ((IGetVoxyRenderSystem) MinecraftClient.getInstance().worldRenderer).getVoxyRenderSystem();
+            if (renderer != null) {
+                IrisUtil.CAPTURED_VIEWPORT_PARAMETERS.apply(renderer);
+            }
+        }
+    }
+
     @Override
     public IrisShaderPatch voxy$getPatchData() {
         return this.patchData;

src/main/java/me/cortex/voxy/client/mixin/iris/MixinWorldRenderer.java

@@ -0,0 +1,52 @@
+package me.cortex.voxy.client.mixin.iris;
+
+import com.mojang.blaze3d.buffers.GpuBufferSlice;
+import me.cortex.voxy.client.core.IGetVoxyRenderSystem;
+import me.cortex.voxy.client.core.VoxyRenderSystem;
+import me.cortex.voxy.client.core.util.IrisUtil;
+import net.caffeinemc.mods.sodium.client.render.chunk.ChunkRenderMatrices;
+import net.caffeinemc.mods.sodium.client.util.FogStorage;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.Camera;
+import net.minecraft.client.render.RenderTickCounter;
+import net.minecraft.client.render.WorldRenderer;
+import net.minecraft.client.util.ObjectAllocator;
+import org.joml.Matrix4f;
+import org.joml.Vector4f;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import static org.lwjgl.opengl.GL11C.glViewport;
+
+@Mixin(WorldRenderer.class)
+public class MixinWorldRenderer {
+    @Shadow @Final private MinecraftClient client;
+
+    @Inject(method = "render", at = @At("HEAD"), order = 100)
+    private void voxy$injectIrisCompat(
+            ObjectAllocator allocator,
+            RenderTickCounter tickCounter,
+            boolean renderBlockOutline,
+            Camera camera,
+            Matrix4f positionMatrix,
+            Matrix4f projectionMatrix,
+            GpuBufferSlice fog,
+            Vector4f fogColor,
+            boolean shouldRenderSky,
+            CallbackInfo ci) {
+        if (IrisUtil.irisShaderPackEnabled()) {
+            var renderer = ((IGetVoxyRenderSystem) this).getVoxyRenderSystem();
+            if (renderer != null) {
+                //Fixthe fucking viewport dims, fuck iris
+                glViewport(0,0,MinecraftClient.getInstance().getFramebuffer().textureWidth, MinecraftClient.getInstance().getFramebuffer().textureHeight);
+
+                var pos = camera.getCameraPos();
+                IrisUtil.CAPTURED_VIEWPORT_PARAMETERS = new IrisUtil.CapturedViewportParameters(new ChunkRenderMatrices(projectionMatrix, positionMatrix), ((FogStorage) this.client.gameRenderer).sodium$getFogParameters(), pos.x, pos.y, pos.z);
+            }
+        }
+    }
+}

src/main/java/me/cortex/voxy/client/mixin/sodium/MixinDefaultChunkRenderer.java

@@ -1,6 +1,8 @@
 package me.cortex.voxy.client.mixin.sodium;
 
 import me.cortex.voxy.client.core.IGetVoxyRenderSystem;
+import me.cortex.voxy.client.core.rendering.Viewport;
+import me.cortex.voxy.client.core.util.IrisUtil;
 import net.caffeinemc.mods.sodium.client.gl.device.CommandList;
 import net.caffeinemc.mods.sodium.client.render.chunk.ChunkRenderMatrices;
 import net.caffeinemc.mods.sodium.client.render.chunk.DefaultChunkRenderer;
@@ -23,7 +25,13 @@ public class MixinDefaultChunkRenderer {
         if (renderPass == DefaultTerrainRenderPasses.CUTOUT) {
             var renderer = ((IGetVoxyRenderSystem) MinecraftClient.getInstance().worldRenderer).getVoxyRenderSystem();
             if (renderer != null) {
-                renderer.renderOpaque(renderer.setupViewport(matrices, fogParameters, camera.x, camera.y, camera.z));
+                Viewport<?> viewport = null;
+                if (IrisUtil.irisShaderPackEnabled()) {
+                    viewport = renderer.getViewport();
+                } else {
+                    viewport = renderer.setupViewport(matrices, fogParameters, camera.x, camera.y, camera.z);
+                }
+                renderer.renderOpaque(viewport);
             }
         }
     }

src/main/resources/client.voxy.mixins.json

@@ -3,6 +3,7 @@
   "package": "me.cortex.voxy.client.mixin",
   "compatibilityLevel": "JAVA_17",
   "client": [
+    "iris.MixinWorldRenderer",
     "iris.MixinPackRenderTargetDirectives",
     "iris.CustomUniformsAccessor",
     "iris.IrisRenderingPipelineAccessor",