From 46619c5e93a96864048d0ba83cdbfaaa9c46e44b Mon Sep 17 00:00:00 2001
From: Bixilon <bixilon@bixilon.de>
Date: Thu, 6 Jan 2022 11:35:16 +0100
Subject: [PATCH] fun effect: invert

---
 .../world/fun/DefaultFunEffects.kt            |  2 ++
 .../framebuffer/world/fun/effects/Invert.kt   | 35 +++++++++++++++++++
 .../framebuffer/world/fun/invert/invert.fsh   | 28 +++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/effects/Invert.kt
 create mode 100644 src/main/resources/assets/minosoft/rendering/shader/framebuffer/world/fun/invert/invert.fsh

diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/DefaultFunEffects.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/DefaultFunEffects.kt
index 29877a42b..0b0040323 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/DefaultFunEffects.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/DefaultFunEffects.kt
@@ -16,8 +16,10 @@ package de.bixilon.minosoft.gui.rendering.framebuffer.world.`fun`
 import de.bixilon.minosoft.data.registries.factory.DefaultFactory
 import de.bixilon.minosoft.gui.rendering.framebuffer.world.`fun`.effects.BlackWhite
 import de.bixilon.minosoft.gui.rendering.framebuffer.world.`fun`.effects.Flip
+import de.bixilon.minosoft.gui.rendering.framebuffer.world.`fun`.effects.Invert
 
 object DefaultFunEffects : DefaultFactory<FunEffectFactory<*>>(
     BlackWhite,
     Flip,
+    Invert,
 )
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/effects/Invert.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/effects/Invert.kt
new file mode 100644
index 000000000..d2a31a157
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/framebuffer/world/fun/effects/Invert.kt
@@ -0,0 +1,35 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020-2022 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.gui.rendering.framebuffer.world.`fun`.effects
+
+import de.bixilon.minosoft.data.registries.ResourceLocation
+import de.bixilon.minosoft.gui.rendering.RenderWindow
+import de.bixilon.minosoft.gui.rendering.framebuffer.world.`fun`.FunEffect
+import de.bixilon.minosoft.gui.rendering.framebuffer.world.`fun`.FunEffectFactory
+import de.bixilon.minosoft.gui.rendering.system.base.shader.Shader
+import de.bixilon.minosoft.util.KUtil.toResourceLocation
+
+class Invert(override val renderWindow: RenderWindow) : FunEffect {
+    override val resourceLocation: ResourceLocation get() = RESOURCE_LOCATION
+    override val shader: Shader = createShader(fragment = "minosoft:framebuffer/world/fun/invert.fsh".toResourceLocation())
+
+
+    companion object : FunEffectFactory<Invert> {
+        override val RESOURCE_LOCATION: ResourceLocation = "minosoft:invert".toResourceLocation()
+
+        override fun build(renderWindow: RenderWindow): Invert {
+            return Invert(renderWindow)
+        }
+    }
+}
diff --git a/src/main/resources/assets/minosoft/rendering/shader/framebuffer/world/fun/invert/invert.fsh b/src/main/resources/assets/minosoft/rendering/shader/framebuffer/world/fun/invert/invert.fsh
new file mode 100644
index 000000000..37998b6a0
--- /dev/null
+++ b/src/main/resources/assets/minosoft/rendering/shader/framebuffer/world/fun/invert/invert.fsh
@@ -0,0 +1,28 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+#version 330 core
+
+in vec2 finUV;
+
+out vec4 foutColor;
+
+uniform sampler2D uColor;
+
+#include "minosoft:alpha"
+
+void main() {
+    foutColor = texture(uColor, vec2(finUV.x, finUV.y));
+    foutColor.rgb = 1.0f - foutColor.rgb;
+    discard_alpha();
+}