| /* |
| * libjingle |
| * Copyright 2015 Google Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.webrtc; |
| |
| import android.opengl.GLES20; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.nio.FloatBuffer; |
| |
| /** |
| * Some OpenGL static utility functions. |
| */ |
| public class GlUtil { |
| private GlUtil() {} |
| |
| // Assert that no OpenGL ES 2.0 error has been raised. |
| public static void checkNoGLES2Error(String msg) { |
| int error = GLES20.glGetError(); |
| if (error != GLES20.GL_NO_ERROR) { |
| throw new RuntimeException(msg + ": GLES20 error: " + error); |
| } |
| } |
| |
| public static FloatBuffer createFloatBuffer(float[] coords) { |
| // Allocate a direct ByteBuffer, using 4 bytes per float, and copy coords into it. |
| ByteBuffer bb = ByteBuffer.allocateDirect(coords.length * 4); |
| bb.order(ByteOrder.nativeOrder()); |
| FloatBuffer fb = bb.asFloatBuffer(); |
| fb.put(coords); |
| fb.position(0); |
| return fb; |
| } |
| |
| /** |
| * Generate texture with standard parameters. |
| */ |
| public static int generateTexture(int target) { |
| final int textureArray[] = new int[1]; |
| GLES20.glGenTextures(1, textureArray, 0); |
| final int textureId = textureArray[0]; |
| GLES20.glBindTexture(target, textureId); |
| GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR); |
| GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR); |
| GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE); |
| GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE); |
| checkNoGLES2Error("generateTexture"); |
| return textureId; |
| } |
| } |