Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2014-2015 Sri Harsha Chilakapati * * 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 com.shc.webgl4j.client; import com.google.gwt.core.client.JsArrayInteger; import com.google.gwt.typedarrays.shared.Int32Array; /** * @author Sri Harsha Chilakapati */ public final class WEBGL_draw_buffers { public static final int GL_COLOR_ATTACHMENT0_WEBGL = 0x8CE0; public static final int GL_COLOR_ATTACHMENT1_WEBGL = 0x8CE1; public static final int GL_COLOR_ATTACHMENT2_WEBGL = 0x8CE2; public static final int GL_COLOR_ATTACHMENT3_WEBGL = 0x8CE3; public static final int GL_COLOR_ATTACHMENT4_WEBGL = 0x8CE4; public static final int GL_COLOR_ATTACHMENT5_WEBGL = 0x8CE5; public static final int GL_COLOR_ATTACHMENT6_WEBGL = 0x8CE6; public static final int GL_COLOR_ATTACHMENT7_WEBGL = 0x8CE7; public static final int GL_COLOR_ATTACHMENT8_WEBGL = 0x8CE8; public static final int GL_COLOR_ATTACHMENT9_WEBGL = 0x8CE9; public static final int GL_COLOR_ATTACHMENT10_WEBGL = 0x8CEA; public static final int GL_COLOR_ATTACHMENT11_WEBGL = 0x8CEB; public static final int GL_COLOR_ATTACHMENT12_WEBGL = 0x8CEC; public static final int GL_COLOR_ATTACHMENT13_WEBGL = 0x8CED; public static final int GL_COLOR_ATTACHMENT14_WEBGL = 0x8CEE; public static final int GL_COLOR_ATTACHMENT15_WEBGL = 0x8CEF; public static final int GL_DRAW_BUFFER0_WEBGL = 0x8825; public static final int GL_DRAW_BUFFER1_WEBGL = 0x8826; public static final int GL_DRAW_BUFFER2_WEBGL = 0x8827; public static final int GL_DRAW_BUFFER3_WEBGL = 0x8828; public static final int GL_DRAW_BUFFER4_WEBGL = 0x8829; public static final int GL_DRAW_BUFFER5_WEBGL = 0x882A; public static final int GL_DRAW_BUFFER6_WEBGL = 0x882B; public static final int GL_DRAW_BUFFER7_WEBGL = 0x882C; public static final int GL_DRAW_BUFFER8_WEBGL = 0x882D; public static final int GL_DRAW_BUFFER9_WEBGL = 0x882E; public static final int GL_DRAW_BUFFER10_WEBGL = 0x882F; public static final int GL_DRAW_BUFFER11_WEBGL = 0x8830; public static final int GL_DRAW_BUFFER12_WEBGL = 0x8831; public static final int GL_DRAW_BUFFER13_WEBGL = 0x8832; public static final int GL_DRAW_BUFFER14_WEBGL = 0x8833; public static final int GL_DRAW_BUFFER15_WEBGL = 0x8834; public static final int GL_MAX_COLOR_ATTACHMENTS_WEBGL = 0x8CDF; public static final int GL_MAX_DRAW_BUFFERS_WEBGL = 0x8824; /* Prevent instantiation */ private WEBGL_draw_buffers() { } public static boolean isSupported() { if (!WebGL10.isSupported()) return false; if (!WebGL10.isContextCompatible()) throw new IllegalStateException( "You must have a WebGL context >= 1.0 to check if extension is supported."); for (String supportedExtension : WebGL10.glGetSupportedExtensions()) { switch (supportedExtension) { case "WEBGL_draw_buffers": case "O_WEBGL_draw_buffers": case "IE_WEBGL_draw_buffers": case "MOZ_WEBGL_draw_buffers": case "WEBKIT_WEBGL_draw_buffers": return true; } } return false; } public static void enableExtension() { if (!WebGL10.isContextCompatible()) throw new IllegalStateException("You must have a WebGL context >= 1.0 to enable this extension."); if (!isSupported()) throw new RuntimeException("This browser does not support the WEBGL_draw_buffers extension."); if (!isExtensionEnabled()) nEnableExtension(); } private static void checkExtension() { if (!WebGL10.isContextCompatible()) throw new RuntimeException("You must create a WebGL context before accessing extension methods."); if (!isExtensionEnabled()) throw new IllegalStateException("Extension must be enabled before using any members."); } public static void glDrawBuffersWEBGL(JsArrayInteger buffers) { checkExtension(); nglDrawBuffersWEBGL(buffers); } public static void glDrawBuffersWEBGL(int... buffers) { JsArrayInteger array = JsArrayInteger.createArray(buffers.length).cast(); for (int buffer : buffers) array.push(buffer); glDrawBuffersWEBGL(array); } public static void glDrawBuffersWEBGL(Int32Array buffers) { JsArrayInteger array = JsArrayInteger.createArray(buffers.length()).cast(); for (int i = 0; i < buffers.length(); i++) array.push(buffers.get(i)); glDrawBuffersWEBGL(array); } public static native boolean isExtensionEnabled() /*-{ return typeof ($wnd.gl.wdb_ext) !== 'undefined'; }-*/; private static native void nEnableExtension() /*-{ $wnd.gl.wdb_ext = $wnd.gl.getExtension('WEBGL_draw_buffers') || $wnd.gl.getExtension('O_WEBGL_draw_buffers') || $wnd.gl.getExtension('IE_WEBGL_draw_buffers') || $wnd.gl.getExtension('MOZ_WEBGL_draw_buffers') || $wnd.gl.getExtension('WEBKIT_WEBGL_draw_buffers'); }-*/; private static native void nglDrawBuffersWEBGL(JsArrayInteger buffers) /*-{ $wnd.gl.wdb_ext.drawBuffersWEBGL(buffers); }-*/; }