more fixes

Author: IMS212

common/src/main/java/net/irisshaders/iris/gl/IrisRenderSystem.java

@@ -586,6 +586,9 @@ public void drawBuffers(int framebuffer, int[] buffers) {
 
 		@Override
 		public int getTexParameteri(int texture, int target, int pname) {
+			if (Screen.hasAltDown()) {
+				return ARBDirectStateAccess.glGetTextureParameteri(texture, pname);
+			}
 			bindTextureForSetup(target, texture);
 			return GL32C.glGetTexParameteri(target, pname);
 		}

common/src/main/java/net/irisshaders/iris/mixin/texture/MixinAbstractTexture.java

@@ -2,21 +2,59 @@
 
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
 import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import com.mojang.blaze3d.platform.GlStateManager;
+import com.mojang.blaze3d.systems.RenderSystem;
+import net.irisshaders.iris.mixinterface.AbstractTextureExtended;
 import net.irisshaders.iris.pbr.TextureTracker;
 import net.minecraft.client.renderer.texture.AbstractTexture;
+import org.lwjgl.opengl.GL11;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 
 @Mixin(AbstractTexture.class)
-public class MixinAbstractTexture {
+public abstract class MixinAbstractTexture implements AbstractTextureExtended {
 	@Shadow
 	protected int id;
 
+	@Shadow
+	public abstract void bind();
+
+	@Shadow
+	private int minFilter;
+
+	@Shadow
+	private int magFilter;
+
 	@WrapOperation(method = "getId()I", at = @At(value = "INVOKE", target = "Lcom/mojang/blaze3d/platform/TextureUtil;generateTextureId()I", remap = false))
 	private int iris$afterGenerateId(Operation<Integer> original) {
 		int id = original.call();
 		TextureTracker.INSTANCE.trackTexture(id, (AbstractTexture) (Object) this);
 		return id;
 	}
+
+	@Override
+	public void setNearestFilter() {
+		RenderSystem.assertOnRenderThreadOrInit();
+		int min;
+		int mag;
+		boolean mipmap = minFilter >= 0x2700;
+		min = mipmap ? GL11.GL_NEAREST_MIPMAP_NEAREST : GL11.GL_NEAREST;
+		mag = GL11.GL_NEAREST;
+
+		boolean bl3 = this.minFilter != min;
+		boolean bl4 = this.magFilter != mag;
+		if (bl4 || bl3) {
+			this.bind();
+			if (bl3) {
+				GlStateManager._texParameter(3553, 10241, min);
+				this.minFilter = min;
+			}
+
+			if (bl4) {
+				GlStateManager._texParameter(3553, 10240, mag);
+				this.magFilter = mag;
+			}
+		}
+	}
 }

common/src/main/java/net/irisshaders/iris/mixinterface/AbstractTextureExtended.java

@@ -0,0 +1,5 @@
+package net.irisshaders.iris.mixinterface;
+
+public interface AbstractTextureExtended {
+	void setNearestFilter();
+}

common/src/main/java/net/irisshaders/iris/pbr/format/TextureFormat.java

@@ -1,6 +1,7 @@
 package net.irisshaders.iris.pbr.format;
 
 import net.irisshaders.iris.gl.IrisRenderSystem;
+import net.irisshaders.iris.mixinterface.AbstractTextureExtended;
 import net.irisshaders.iris.pbr.mipmap.CustomMipmapGenerator;
 import net.irisshaders.iris.pbr.texture.PBRType;
 import net.minecraft.client.renderer.texture.AbstractTexture;
@@ -46,12 +47,7 @@ default List<String> getDefines() {
 
 	default void setupTextureParameters(PBRType pbrType, AbstractTexture texture) {
 		if (!canInterpolateValues(pbrType)) {
-			int minFilter = IrisRenderSystem.getTexParameteri(texture.getId(), GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER);
-			// Non-mipped filters begin at 0x2600 whereas mipped filters begin at 0x2700,
-			// so this bit mask can be used to check if the filter is mipped or not
-			boolean mipmap = minFilter >= 0x2700;
-			IrisRenderSystem.texParameteri(texture.getId(), GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, mipmap ? GL11.GL_NEAREST_MIPMAP_NEAREST : GL11.GL_NEAREST);
-			IrisRenderSystem.texParameteri(texture.getId(), GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);
+			((AbstractTextureExtended) texture).setNearestFilter();
 		}
 	}