Java tutorial
/** * This file is part of Obsidian, licensed under the MIT License (MIT). * * Copyright (c) 2013-2014 ObsidianBox <http://obsidianbox.org/> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package org.obsidianbox.obsidian.renderer; import java.io.IOException; import java.io.InputStream; import java.nio.ByteBuffer; import java.util.HashMap; import java.util.LinkedList; import java.util.Map; import com.flowpowered.math.vector.Vector2f; import com.flowpowered.math.vector.Vector3f; import cpw.mods.fml.relauncher.Side; import cpw.mods.fml.relauncher.SideOnly; import net.minecraft.client.Minecraft; import net.minecraft.util.ResourceLocation; import org.lwjgl.opengl.GL11; import org.lwjgl.opengl.GL20; import org.lwjgl.opengl.GL30; import org.obsidianbox.magma.Game; import org.obsidianbox.magma.addon.Addon; import org.obsidianbox.magma.renderer.Renderer; import org.obsidianbox.obsidian.addon.CommonAddonManager; import org.spout.renderer.api.Camera; import org.spout.renderer.api.Material; import org.spout.renderer.api.Pipeline; import org.spout.renderer.api.data.UniformHolder; import org.spout.renderer.api.data.VertexData; import org.spout.renderer.api.gl.Context; import org.spout.renderer.api.gl.Program; import org.spout.renderer.api.gl.Texture; import org.spout.renderer.api.gl.Texture.FilterMode; import org.spout.renderer.api.gl.Texture.Format; import org.spout.renderer.api.gl.Texture.InternalFormat; import org.spout.renderer.api.gl.VertexArray; import org.spout.renderer.api.model.Model; import org.spout.renderer.api.util.CausticUtil; import org.spout.renderer.api.util.MeshGenerator; import org.spout.renderer.api.util.Rectangle; import org.spout.renderer.lwjgl.LWJGLUtil; /** * Renders the Addon GUI API using the Caustic rendering library. */ @SideOnly(Side.CLIENT) public class GuiRenderer extends Renderer { // Caustic GUI properties private final LinkedList<Model> guiRenderList = new LinkedList<>(); private final Rectangle rectangle = new Rectangle(); private Camera camera; private Pipeline pipeline; public GuiRenderer(Game game) { super(game); } @Override public void initialize(Context context) { super.initialize(context); updateScaledAttributes(); camera = Camera.createOrthographic(1, 0, 1 / aspectRatio, 0, 0.1f, 1000); context.setCamera(camera); pipeline = new Pipeline.PipelineBuilder().renderModels(guiRenderList).build(); } @Override public void render() { // Snapshot Minecraft rendering final int mcProgId = GL11.glGetInteger(GL20.GL_CURRENT_PROGRAM); final int mcVAID = GL11.glGetInteger(GL11.GL_VERTEX_ARRAY); updateScaledAttributes(); LWJGLUtil.checkForGLError(); GL11.glEnable(GL11.GL_BLEND); GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA); pipeline.run(context); GL11.glDisable(GL11.GL_BLEND); LWJGLUtil.checkForGLError(); GL20.glUseProgram(mcProgId); GL30.glBindVertexArray(mcVAID); LWJGLUtil.checkForGLError(); } @Override public void dispose() { } @Override public GuiRenderer addModel(Addon addon, Model model) { if (addon == null) { throw new IllegalStateException("Cannot add a model with a null addon instance"); } if (model == null) { throw new IllegalStateException( addon.getDescription().getName() + " attempted to add a model with a null instance!"); } guiRenderList.add(model); return this; } @Override public Texture createTexture(Addon addon, String name, Format format, FilterMode min, FilterMode mag, InternalFormat internalFormat, float anisotropicFiltering) throws IOException { if (name == null || name.isEmpty()) { throw new IOException( addon.getDescription().getName() + " attempted to create texture with a null or empty name!"); } // Create addon texture store or return loaded texture Map<String, Texture> textures = ADDON_TEXTURES.get(addon); if (textures == null) { textures = new HashMap<>(); ADDON_TEXTURES.put(addon, textures); } else { final Texture texture = textures.get(name); if (texture != null) { return texture; } } final InputStream textureStream = Minecraft.getMinecraft().getResourceManager() .getResource(new ResourceLocation(Game.MOD_ID.toLowerCase(), "textures/gui/" + addon.getDescription().getIdentifier() + "/" + name + ".png")) .getInputStream(); final Texture texture = context.newTexture(); texture.create(); texture.setFilters(min, mag); texture.setFormat(internalFormat); if (anisotropicFiltering > 0f) { texture.setAnisotropicFiltering(anisotropicFiltering); } final ByteBuffer data = CausticUtil.getImageData(textureStream, format, rectangle); texture.setImageData(data, rectangle.getWidth(), rectangle.getHeight()); textures.put(name, texture); return texture; } @Override public Model createTexturedPlane(Addon addon, String programName, UniformHolder holder, Texture diffuse, Texture normal, Texture specular, Vector2f size) throws IOException { // We ignore normal and specular for the GUI if (diffuse == null) { throw new IOException( addon.getDescription().getName() + " attempted to texture a plane with a null diffuse!"); } // Generate the plane final VertexData data = MeshGenerator.generatePlane(size); final VertexArray array = context.newVertexArray(); array.create(); array.setData(data); // Grab the textured program final Program program = loadProgram(((CommonAddonManager) game.getAddonManager()).getInternalAddon(), programName); // Create a material for it final Material material = new Material(program); if (holder != null) { material.getUniforms().addAll(holder); } material.addTexture(0, diffuse); final Model model = new Model(array, material); final float aspect = diffuse.getWidth() / (float) diffuse.getHeight(); model.setScale(new Vector3f(aspect, 1, 1)); return model; } @Override public Camera getCamera() { return camera; } }