diff options
Diffstat (limited to 'opengl/tests/testViewport/src/com/android/test/TestView.java')
| -rw-r--r-- | opengl/tests/testViewport/src/com/android/test/TestView.java | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/opengl/tests/testViewport/src/com/android/test/TestView.java b/opengl/tests/testViewport/src/com/android/test/TestView.java new file mode 100644 index 0000000..23cc37d --- /dev/null +++ b/opengl/tests/testViewport/src/com/android/test/TestView.java @@ -0,0 +1,262 @@ +/* + * Copyright (C) 2009 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.test; +/* + * Copyright (C) 2008 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +import java.nio.ByteBuffer; +import java.nio.ByteOrder; +import java.nio.CharBuffer; +import java.nio.FloatBuffer; + +import android.content.Context; +import android.opengl.GLSurfaceView; +import android.util.AttributeSet; +import android.util.Log; +import android.view.KeyEvent; +import android.view.MotionEvent; + +import javax.microedition.khronos.egl.EGL10; +import javax.microedition.khronos.egl.EGLConfig; +import javax.microedition.khronos.opengles.GL; +import javax.microedition.khronos.opengles.GL10; +import javax.microedition.khronos.opengles.GL11; +/** + * An implementation of SurfaceView that uses the dedicated surface for + * displaying an OpenGL animation. This allows the animation to run in a + * separate thread, without requiring that it be driven by the update mechanism + * of the view hierarchy. + * + * The application-specific rendering code is delegated to a GLView.Renderer + * instance. + */ +class TestView extends GLSurfaceView { + TestView(Context context) { + super(context); + init(); + } + + public TestView(Context context, AttributeSet attrs) { + super(context, attrs); + init(); + } + + private void init() { + setRenderer(new Renderer()); + setRenderMode(RENDERMODE_WHEN_DIRTY); + } + + /** A grid is a topologically rectangular array of vertices. + * + * The vertex and index data are held in VBO objects because on most + * GPUs VBO objects are the fastest way of rendering static vertex + * and index data. + * + */ + + private static class Grid { + // Size of vertex data elements in bytes: + final static int FLOAT_SIZE = 4; + final static int CHAR_SIZE = 2; + + // Vertex structure: + // float x, y, z; + + final static int VERTEX_SIZE = 3 * FLOAT_SIZE; + + private int mVertexBufferObjectId; + private int mElementBufferObjectId; + + // These buffers are used to hold the vertex and index data while + // constructing the grid. Once createBufferObjects() is called + // the buffers are nulled out to save memory. + + private ByteBuffer mVertexByteBuffer; + private FloatBuffer mVertexBuffer; + private CharBuffer mIndexBuffer; + + private int mW; + private int mH; + private int mIndexCount; + + public Grid(int w, int h) { + if (w < 0 || w >= 65536) { + throw new IllegalArgumentException("w"); + } + if (h < 0 || h >= 65536) { + throw new IllegalArgumentException("h"); + } + if (w * h >= 65536) { + throw new IllegalArgumentException("w * h >= 65536"); + } + + mW = w; + mH = h; + int size = w * h; + + mVertexByteBuffer = ByteBuffer.allocateDirect(VERTEX_SIZE * size) + .order(ByteOrder.nativeOrder()); + mVertexBuffer = mVertexByteBuffer.asFloatBuffer(); + + int quadW = mW - 1; + int quadH = mH - 1; + int quadCount = quadW * quadH; + int indexCount = quadCount * 6; + mIndexCount = indexCount; + mIndexBuffer = ByteBuffer.allocateDirect(CHAR_SIZE * indexCount) + .order(ByteOrder.nativeOrder()).asCharBuffer(); + + /* + * Initialize triangle list mesh. + * + * [0]-----[ 1] ... + * | / | + * | / | + * | / | + * [w]-----[w+1] ... + * | | + * + */ + + { + int i = 0; + for (int y = 0; y < quadH; y++) { + for (int x = 0; x < quadW; x++) { + char a = (char) (y * mW + x); + char b = (char) (y * mW + x + 1); + char c = (char) ((y + 1) * mW + x); + char d = (char) ((y + 1) * mW + x + 1); + + mIndexBuffer.put(i++, a); + mIndexBuffer.put(i++, c); + mIndexBuffer.put(i++, b); + + mIndexBuffer.put(i++, b); + mIndexBuffer.put(i++, c); + mIndexBuffer.put(i++, d); + } + } + } + + } + + public void set(int i, int j, float x, float y, float z) { + if (i < 0 || i >= mW) { + throw new IllegalArgumentException("i"); + } + if (j < 0 || j >= mH) { + throw new IllegalArgumentException("j"); + } + + int index = mW * j + i; + + mVertexBuffer.position(index * VERTEX_SIZE / FLOAT_SIZE); + mVertexBuffer.put(x); + mVertexBuffer.put(y); + mVertexBuffer.put(z); + } + + public void createBufferObjects(GL gl) { + // Generate a the vertex and element buffer IDs + int[] vboIds = new int[2]; + GL11 gl11 = (GL11) gl; + gl11.glGenBuffers(2, vboIds, 0); + mVertexBufferObjectId = vboIds[0]; + mElementBufferObjectId = vboIds[1]; + + // Upload the vertex data + gl11.glBindBuffer(GL11.GL_ARRAY_BUFFER, mVertexBufferObjectId); + mVertexByteBuffer.position(0); + gl11.glBufferData(GL11.GL_ARRAY_BUFFER, mVertexByteBuffer.capacity(), mVertexByteBuffer, GL11.GL_STATIC_DRAW); + + gl11.glBindBuffer(GL11.GL_ELEMENT_ARRAY_BUFFER, mElementBufferObjectId); + mIndexBuffer.position(0); + gl11.glBufferData(GL11.GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer.capacity() * CHAR_SIZE, mIndexBuffer, GL11.GL_STATIC_DRAW); + + // We don't need the in-memory data any more + mVertexBuffer = null; + mVertexByteBuffer = null; + mIndexBuffer = null; + } + + public void draw(GL10 gl) { + GL11 gl11 = (GL11) gl; + + gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); + + gl11.glBindBuffer(GL11.GL_ARRAY_BUFFER, mVertexBufferObjectId); + gl11.glVertexPointer(3, GL10.GL_FLOAT, VERTEX_SIZE, 0); + + gl11.glBindBuffer(GL11.GL_ELEMENT_ARRAY_BUFFER, mElementBufferObjectId); + gl11.glDrawElements(GL10.GL_TRIANGLES, mIndexCount, GL10.GL_UNSIGNED_SHORT, 0); + gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); + gl11.glBindBuffer(GL11.GL_ARRAY_BUFFER, 0); + gl11.glBindBuffer(GL11.GL_ELEMENT_ARRAY_BUFFER, 0); + } + } + + + private class Renderer implements GLSurfaceView.Renderer { + private static final String TAG = "Renderer"; + private Grid mGrid; + + public void onDrawFrame(GL10 gl) { + gl.glClearColor(0,0,1,1); + gl.glClear(GL10.GL_COLOR_BUFFER_BIT); + mGrid.draw(gl); + } + + public void onSurfaceChanged(GL10 gl, int width, int height) { + gl.glViewport(0, 0, width, height); + gl.glMatrixMode(GL11.GL_PROJECTION); + gl.glLoadIdentity(); + gl.glOrthof(0, width, height, 0, -1, 1); + gl.glMatrixMode(GL11.GL_MODELVIEW); + createGrid(gl, width, height); + } + + public void onSurfaceCreated(GL10 gl, EGLConfig config) { + } + + private void createGrid(GL10 gl, float w, float h) { + mGrid = new Grid(2, 2); + for (int j = 0; j < 2; j++) { + for (int i = 0; i < 2; i++) { + float x = w * i; + float y = h * j; + float z = 0.0f; + mGrid.set(i,j, x, y, z); + } + } + mGrid.createBufferObjects(gl); + } + } +} + |