commit baa47ae9cff61bc68a41358ff80263460468e140 Author: Leszek Koltunski Date: Tue May 2 15:12:10 2017 +0100 Transform Feedback Example. diff --git a/src/main/AndroidManifest.xml b/src/main/AndroidManifest.xml index b0afc56..1ce435b 100644 --- a/src/main/AndroidManifest.xml +++ b/src/main/AndroidManifest.xml @@ -45,5 +45,6 @@ + diff --git a/src/main/java/org/distorted/examples/TableOfContents.java b/src/main/java/org/distorted/examples/TableOfContents.java index 9012fd8..589c6f4 100644 --- a/src/main/java/org/distorted/examples/TableOfContents.java +++ b/src/main/java/org/distorted/examples/TableOfContents.java @@ -63,6 +63,7 @@ import org.distorted.examples.wind.WindActivity; import org.distorted.examples.mirror.MirrorActivity; import org.distorted.examples.blur.BlurActivity; import org.distorted.examples.multiblur.MultiblurActivity; +import org.distorted.examples.feedback.FeedbackActivity; /////////////////////////////////////////////////////////////////////////////////////////////////// @@ -346,6 +347,15 @@ public class TableOfContents extends ListActivity activityMapping.put(i++, MultiblurActivity.class); } + { + final Map item = new HashMap<>(); + item.put(ITEM_IMAGE, R.drawable.icon_example_feedback); + item.put(ITEM_TITLE, (i+1)+". "+getText(R.string.example_feedback)); + item.put(ITEM_SUBTITLE, getText(R.string.example_feedback_subtitle)); + data.add(item); + activityMapping.put(i++, FeedbackActivity.class); + } + final SimpleAdapter dataAdapter = new SimpleAdapter(this, data, R.layout.toc_item, new String[] {ITEM_IMAGE, ITEM_TITLE, ITEM_SUBTITLE}, new int[] {R.id.Image, R.id.Title, R.id.SubTitle}); setListAdapter(dataAdapter); diff --git a/src/main/java/org/distorted/examples/feedback/FeedbackActivity.java b/src/main/java/org/distorted/examples/feedback/FeedbackActivity.java new file mode 100644 index 0000000..23003b8 --- /dev/null +++ b/src/main/java/org/distorted/examples/feedback/FeedbackActivity.java @@ -0,0 +1,69 @@ +/////////////////////////////////////////////////////////////////////////////////////////////////// +// Copyright 2016 Leszek Koltunski // +// // +// This file is part of Distorted. // +// // +// Distorted 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 2 of the License, or // +// (at your option) any later version. // +// // +// Distorted 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 Distorted. If not, see . // +/////////////////////////////////////////////////////////////////////////////////////////////////// + +package org.distorted.examples.feedback; + +import android.app.Activity; +import android.os.Bundle; + +import org.distorted.library.Distorted; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +public class FeedbackActivity extends Activity +{ + private FeedbackSurfaceView mView; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + @Override + protected void onCreate(Bundle icicle) + { + super.onCreate(icicle); + mView = new FeedbackSurfaceView(this); + setContentView(mView); + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + @Override + protected void onPause() + { + mView.onPause(); + super.onPause(); + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + @Override + protected void onResume() + { + super.onResume(); + mView.onResume(); + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + @Override + protected void onDestroy() + { + super.onDestroy(); + } + +} diff --git a/src/main/java/org/distorted/examples/feedback/FeedbackRenderer.java b/src/main/java/org/distorted/examples/feedback/FeedbackRenderer.java new file mode 100644 index 0000000..f72ecef --- /dev/null +++ b/src/main/java/org/distorted/examples/feedback/FeedbackRenderer.java @@ -0,0 +1,60 @@ +/////////////////////////////////////////////////////////////////////////////////////////////////// +// Copyright 2016 Leszek Koltunski // +// // +// This file is part of Distorted. // +// // +// Distorted 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 2 of the License, or // +// (at your option) any later version. // +// // +// Distorted 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 Distorted. If not, see . // +/////////////////////////////////////////////////////////////////////////////////////////////////// + +package org.distorted.examples.feedback; + +import android.opengl.GLSurfaceView; + +import javax.microedition.khronos.egl.EGLConfig; +import javax.microedition.khronos.opengles.GL10; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +class FeedbackRenderer implements GLSurfaceView.Renderer +{ + + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + FeedbackRenderer(GLSurfaceView v) + { + + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + public void onDrawFrame(GL10 glUnused) + { + TransformFeedback tf = new TransformFeedback(); + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + public void onSurfaceChanged(GL10 glUnused, int width, int height) + { + + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + public void onSurfaceCreated(GL10 glUnused, EGLConfig config) + { + + } +} diff --git a/src/main/java/org/distorted/examples/feedback/FeedbackSurfaceView.java b/src/main/java/org/distorted/examples/feedback/FeedbackSurfaceView.java new file mode 100644 index 0000000..ee059c4 --- /dev/null +++ b/src/main/java/org/distorted/examples/feedback/FeedbackSurfaceView.java @@ -0,0 +1,42 @@ +/////////////////////////////////////////////////////////////////////////////////////////////////// +// Copyright 2016 Leszek Koltunski // +// // +// This file is part of Distorted. // +// // +// Distorted 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 2 of the License, or // +// (at your option) any later version. // +// // +// Distorted 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 Distorted. If not, see . // +/////////////////////////////////////////////////////////////////////////////////////////////////// + +package org.distorted.examples.feedback; + +import android.app.ActivityManager; +import android.content.Context; +import android.content.pm.ConfigurationInfo; +import android.opengl.GLSurfaceView; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +class FeedbackSurfaceView extends GLSurfaceView +{ +/////////////////////////////////////////////////////////////////////////////////////////////////// + + public FeedbackSurfaceView(Context context) + { + super(context); + final ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); + final ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo(); + setEGLContextClientVersion( (configurationInfo.reqGlEsVersion>>16) >= 3 ? 3:2 ); + setRenderer(new FeedbackRenderer(this)); + } +} + diff --git a/src/main/java/org/distorted/examples/feedback/TransformFeedback.java b/src/main/java/org/distorted/examples/feedback/TransformFeedback.java new file mode 100644 index 0000000..23f36e8 --- /dev/null +++ b/src/main/java/org/distorted/examples/feedback/TransformFeedback.java @@ -0,0 +1,198 @@ +package org.distorted.examples.feedback; + +import android.opengl.EGL14; +import android.opengl.GLES30; +import android.util.Log; + +import java.nio.Buffer; +import java.nio.ByteBuffer; +import java.nio.ByteOrder; +import java.nio.FloatBuffer; + +/** + * Created by izzy on 6/24/15. TransformFeedback is a example of how + * to do transform feedback on Android using OpenGLES 3.0. Closely + * follows the example found at https://open.gl/feedback. + * + * Assumes you have a working instance of GLSurfaceVew. Remember to call + * setEGLContextClientVersion(3) to set the OpenGLES context to API 3.0 + * and have the appropriate OpenGLES specified in the Android manifest file. + */ + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + +public class TransformFeedback { + private final String TAG = "TransformFeedback"; + + +// Vertex shader + private final String vertexShaderSrc = + "#version 300 es \n" + + "in float inValue;\n" + + "out float outValue;\n" + + + "void main() {\n" + + " outValue = sqrt(inValue);\n" + + "}"; + +// Need a fragmentShader or glLinkProgram will throw + private final String fragmentShaderCode = + "#version 300 es \n" + + "precision mediump float;\n" + + "out vec4 fragColor;\n" + + "void main() {\n" + + " fragColor = vec4(1.0,1.0,1.0,1.0);\n" + + "}"; + + private final int mProgram; + + /** + * The TransformFeedback constructor contains all the code to initialize + * and draw the TransformFeedback, so create an instance of TransformFeedback + * i.e. 'new TransformFeedBack()' in your 'GLRenderer.OnDrawFrame()' method. + */ + public TransformFeedback(){ + + // Compile shaders + int vertexShader = loadShader(GLES30.GL_VERTEX_SHADER , vertexShaderSrc ); + int fragmentShader = loadShader(GLES30.GL_FRAGMENT_SHADER, fragmentShaderCode); + + // Create program and attach shaders + mProgram = GLES30.glCreateProgram(); + GLES30.glAttachShader(mProgram, vertexShader); + GLES30.glAttachShader(mProgram, fragmentShader); + + // Tell GL where the feedbackVaryings are in the shader before Linking + // the shaders together to form a program. + final String[] feedbackVaryings = { "outValue" }; + GLES30.glTransformFeedbackVaryings(mProgram, feedbackVaryings, GLES30.GL_INTERLEAVED_ATTRIBS); + checkGlError(TAG + " glTransformFeedbackVaryings"); + + // Link program and look for errors + GLES30.glLinkProgram(mProgram); + + int[] linkSuccessful = new int[1]; + GLES30.glGetProgramiv(mProgram, GLES30.GL_LINK_STATUS, linkSuccessful, 0); + + if (linkSuccessful[0] != 1){ + Log.d(TAG, "glLinkProgram failed"); + } + checkGlError(TAG + " glLinkProgram"); + + /*********** + * Begin Rendering process + * everything before this can be moved to an initialization stage + ***********/ + + // Bring the program into use + GLES30.glUseProgram(mProgram); + checkGlError(TAG + " glUseProgram"); + + // Create data to fill VBO + float[] floatData = { 1.0f, 4.0f, 9.0f, 16.0f, 25.0f, 100.0f }; + int bufferLength = floatData.length * 4; + FloatBuffer data = ByteBuffer.allocateDirect(bufferLength) + .order(ByteOrder.nativeOrder()).asFloatBuffer(); + data.put(floatData).position(0); + + // Create VBO and fill with data + int[] vbo = new int[1]; + GLES30.glGenBuffers(1, vbo, 0); + GLES30.glBindBuffer(GLES30.GL_ARRAY_BUFFER, vbo[0]); + GLES30.glBufferData(GLES30.GL_ARRAY_BUFFER, bufferLength, data, GLES30.GL_STATIC_READ); + checkGlError(TAG + " glBufferData GL_ARRAY_BUFFER"); + + // Link created VBO to shader attribute "inValue" + int inputAttrib = GLES30.glGetAttribLocation(mProgram, "inValue"); + GLES30.glEnableVertexAttribArray(inputAttrib); + GLES30.glVertexAttribPointer(inputAttrib, 1, GLES30.GL_FLOAT, false, 4, 0); + checkGlError(TAG + " glVertexAttribPointer"); + + // Create transform feedback buffer object and bind to transform feedback + // this creates space in a buffer object for the TransformFeedback. + int[] tbo = new int[1]; + GLES30.glGenBuffers(1, tbo, 0); + GLES30.glBindBuffer(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, tbo[0]); + GLES30.glBufferData(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, bufferLength, null, GLES30.GL_STATIC_READ); + GLES30.glBindBufferBase(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, 0, tbo[0]); //very important + + checkGlError(TAG + " glBindBufferBase"); + + // Disable Rasterizer if you just need the data + GLES30.glEnable(GLES30.GL_RASTERIZER_DISCARD); + + // Start the TransformFeedback, Draw the Arrays, then End the Transform Feedback + GLES30.glBeginTransformFeedback(GLES30.GL_POINTS); + GLES30.glDrawArrays(GLES30.GL_POINTS, 0, bufferLength); + checkGlError(TAG + " glDrawArrays"); + GLES30.glEndTransformFeedback(); + + // Reenable Rasterizer if you need it, which you do if you are drawing anything. + GLES30.glDisable(GLES30.GL_RASTERIZER_DISCARD); + + // Flush out anything in GL before mapping the buffer. + GLES30.glFlush(); + checkGlError(TAG + " pre-glMapBufferRange "); + + // Map the transform feedback buffer to local address space. + Buffer mappedBuffer = GLES30.glMapBufferRange(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, + 0, bufferLength, GLES30.GL_MAP_READ_BIT); + checkGlError(TAG + " glMapBufferRange"); + + // Read out the data, here we write to logcat. + if (mappedBuffer!=null){ + ByteBuffer bb = ((ByteBuffer) mappedBuffer); + bb.order(ByteOrder.nativeOrder()); + FloatBuffer transformedData = bb.asFloatBuffer(); + + Log.d(TAG, String.format("output values = %f %f %f %f %f %f\n", + transformedData.get(), transformedData.get(), transformedData.get(), + transformedData.get(), transformedData.get(), transformedData.get() )); + } + // Don't forget to Unmap the Transform Feeback Buffer. + GLES30.glUnmapBuffer(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER); + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + private static void checkGlError(String op) + { + int error = GLES30.glGetError(); + + if (error != GLES30.GL_NO_ERROR) + { + String msg = op + ": glError 0x" + Integer.toHexString(error); + throw new RuntimeException(msg); + } + } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + private static int loadShader(final int shaderType, final String shaderSource) + { + int shaderHandle = GLES30.glCreateShader(shaderType); + + if (shaderHandle != 0) + { + GLES30.glShaderSource(shaderHandle, shaderSource); + GLES30.glCompileShader(shaderHandle); + final int[] compileStatus = new int[1]; + GLES30.glGetShaderiv(shaderHandle, GLES30.GL_COMPILE_STATUS, compileStatus, 0); + + if (compileStatus[0] != GLES30.GL_TRUE ) + { + GLES30.glDeleteShader(shaderHandle); + shaderHandle = 0; + } + } + + if (shaderHandle == 0) + { + String error = GLES30.glGetShaderInfoLog(shaderHandle); + android.util.Log.e("Program", "error compiling :"+error); + } + + return shaderHandle; + } +} diff --git a/src/main/res/drawable-hdpi/icon_example_feedback.png b/src/main/res/drawable-hdpi/icon_example_feedback.png new file mode 100644 index 0000000..3d73dbc Binary files /dev/null and b/src/main/res/drawable-hdpi/icon_example_feedback.png differ diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml index e5d2d12..31c2d17 100644 --- a/src/main/res/values/strings.xml +++ b/src/main/res/values/strings.xml @@ -138,6 +138,8 @@ Postprocessing effect: Blur. Multiblur Blur multiple objects which obstruct each other. + Transform Feedback + Transform Feedback test. Click on \'RESET\' and define your path by touching the screen. Then click on one of the effects and see it move along your path. Rotate the scene by swiping the screen