hot shader reloading

src/main/java/de/bixilon/minosoft/gui/rendering/system/base/RenderSystem.kt

@@ -130,6 +130,14 @@ interface RenderSystem {
         setBlendFunction(BlendingFunctions.ONE, BlendingFunctions.ONE_MINUS_SOURCE_ALPHA, BlendingFunctions.ONE, BlendingFunctions.ZERO)
     }
 
+    @Deprecated("Highly unstable")
+    fun reloadShaders() {
+        val copy = shaders.toMutableSet()
+        for (shader in copy) {
+            shader.reload()
+        }
+    }
+
 
     companion object {
 

src/main/java/de/bixilon/minosoft/gui/rendering/system/base/shader/Shader.kt

@@ -34,6 +34,10 @@ interface Shader {
     val log: String
 
     fun load()
+    fun unload()
+
+    @Deprecated("Highly buggy, do not use in normal environment")
+    fun reload()
 
     fun use(): Shader {
         renderWindow.renderSystem.shader = this

src/main/java/de/bixilon/minosoft/gui/rendering/system/opengl/OpenGLShader.kt

@@ -105,6 +105,19 @@ class OpenGLShader(
         renderWindow.renderSystem.shaders += this
     }
 
+    override fun unload() {
+        check(loaded) { "Not loaded!" }
+        glDeleteProgram(this.shader)
+        loaded = false
+        this.shader = -1
+        renderWindow.renderSystem.shaders -= this
+    }
+
+    override fun reload() {
+        unload()
+        load()
+    }
+
 
     private fun getUniformLocation(uniformName: String): Int {
         val location = uniformLocations.getOrPut(uniformName) {

src/main/java/de/bixilon/minosoft/terminal/commands/Commands.kt

@@ -14,11 +14,13 @@
 package de.bixilon.minosoft.terminal.commands
 
 import de.bixilon.minosoft.terminal.commands.connection.SayCommand
+import de.bixilon.minosoft.terminal.commands.rendering.ReloadCommand
 
 object Commands {
     val COMMANDS: List<Command> = listOf(
         HelpCommand,
         SayCommand,
         ConnectionManageCommand,
+        ReloadCommand,
     )
 }

src/main/java/de/bixilon/minosoft/terminal/commands/rendering/ReloadCommand.kt

@@ -0,0 +1,24 @@
+/*
+ * 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.terminal.commands.rendering
+
+import de.bixilon.minosoft.commands.nodes.LiteralNode
+
+object ReloadCommand : RenderingCommand {
+    override var node = LiteralNode("reload", setOf("rl"))
+        .addChild(LiteralNode("shaders", executor = {
+            it.connection.rendering!!.renderWindow.renderSystem.reloadShaders()
+            it.connection.util.sendDebugMessage("Shaders reloaded!")
+        }))
+}

src/main/java/de/bixilon/minosoft/terminal/commands/rendering/RenderingCommand.kt

@@ -0,0 +1,18 @@
+/*
+ * 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.terminal.commands.rendering
+
+import de.bixilon.minosoft.terminal.commands.Command
+
+interface RenderingCommand : Command