| /* |
| * Copyright (C) 2012 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.server.power; |
| |
| import java.io.PrintWriter; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.nio.FloatBuffer; |
| |
| import android.graphics.PixelFormat; |
| import android.graphics.SurfaceTexture; |
| import android.opengl.EGL14; |
| import android.opengl.EGLConfig; |
| import android.opengl.EGLContext; |
| import android.opengl.EGLDisplay; |
| import android.opengl.EGLSurface; |
| import android.opengl.GLES10; |
| import android.opengl.GLES11Ext; |
| import android.os.Looper; |
| import android.util.FloatMath; |
| import android.util.Slog; |
| import android.view.Display; |
| import android.view.DisplayInfo; |
| import android.view.Surface; |
| import android.view.SurfaceControl; |
| import android.view.SurfaceSession; |
| |
| import com.android.server.display.DisplayManagerService; |
| import com.android.server.display.DisplayTransactionListener; |
| |
| /** |
| * Bzzzoooop! *crackle* |
| * <p> |
| * Animates a screen transition from on to off or off to on by applying |
| * some GL transformations to a screenshot. |
| * </p><p> |
| * This component must only be created or accessed by the {@link Looper} thread |
| * that belongs to the {@link DisplayPowerController}. |
| * </p> |
| */ |
| final class ElectronBeam { |
| private static final String TAG = "ElectronBeam"; |
| |
| private static final boolean DEBUG = false; |
| |
| // The layer for the electron beam surface. |
| // This is currently hardcoded to be one layer above the boot animation. |
| private static final int ELECTRON_BEAM_LAYER = 0x40000001; |
| |
| // The relative proportion of the animation to spend performing |
| // the horizontal stretch effect. The remainder is spent performing |
| // the vertical stretch effect. |
| private static final float HSTRETCH_DURATION = 0.5f; |
| private static final float VSTRETCH_DURATION = 1.0f - HSTRETCH_DURATION; |
| |
| // The number of frames to draw when preparing the animation so that it will |
| // be ready to run smoothly. We use 3 frames because we are triple-buffered. |
| // See code for details. |
| private static final int DEJANK_FRAMES = 3; |
| |
| // Set to true when the animation context has been fully prepared. |
| private boolean mPrepared; |
| private int mMode; |
| |
| private final DisplayManagerService mDisplayManager; |
| private int mDisplayLayerStack; // layer stack associated with primary display |
| private int mDisplayWidth; // real width, not rotated |
| private int mDisplayHeight; // real height, not rotated |
| private SurfaceSession mSurfaceSession; |
| private SurfaceControl mSurfaceControl; |
| private final Surface mSurface = new Surface(); |
| private NaturalSurfaceLayout mSurfaceLayout; |
| private EGLDisplay mEglDisplay; |
| private EGLConfig mEglConfig; |
| private EGLContext mEglContext; |
| private EGLSurface mEglSurface; |
| private boolean mSurfaceVisible; |
| private float mSurfaceAlpha; |
| |
| // Texture names. We only use one texture, which contains the screenshot. |
| private final int[] mTexNames = new int[1]; |
| private boolean mTexNamesGenerated; |
| private float mTexMatrix[] = new float[16]; |
| |
| // Vertex and corresponding texture coordinates. |
| // We have 4 2D vertices, so 8 elements. The vertices form a quad. |
| private final FloatBuffer mVertexBuffer = createNativeFloatBuffer(8); |
| private final FloatBuffer mTexCoordBuffer = createNativeFloatBuffer(8); |
| |
| /** |
| * Animates an electron beam warming up. |
| */ |
| public static final int MODE_WARM_UP = 0; |
| |
| /** |
| * Animates an electron beam shutting off. |
| */ |
| public static final int MODE_COOL_DOWN = 1; |
| |
| /** |
| * Animates a simple dim layer to fade the contents of the screen in or out progressively. |
| */ |
| public static final int MODE_FADE = 2; |
| |
| |
| public ElectronBeam(DisplayManagerService displayManager) { |
| mDisplayManager = displayManager; |
| } |
| |
| /** |
| * Warms up the electron beam in preparation for turning on or off. |
| * This method prepares a GL context, and captures a screen shot. |
| * |
| * @param mode The desired mode for the upcoming animation. |
| * @return True if the electron beam is ready, false if it is uncontrollable. |
| */ |
| public boolean prepare(int mode) { |
| if (DEBUG) { |
| Slog.d(TAG, "prepare: mode=" + mode); |
| } |
| |
| mMode = mode; |
| |
| // Get the display size and layer stack. |
| // This is not expected to change while the electron beam surface is showing. |
| DisplayInfo displayInfo = mDisplayManager.getDisplayInfo(Display.DEFAULT_DISPLAY); |
| mDisplayLayerStack = displayInfo.layerStack; |
| mDisplayWidth = displayInfo.getNaturalWidth(); |
| mDisplayHeight = displayInfo.getNaturalHeight(); |
| |
| // Prepare the surface for drawing. |
| if (!tryPrepare()) { |
| dismiss(); |
| return false; |
| } |
| |
| // Done. |
| mPrepared = true; |
| |
| // Dejanking optimization. |
| // Some GL drivers can introduce a lot of lag in the first few frames as they |
| // initialize their state and allocate graphics buffers for rendering. |
| // Work around this problem by rendering the first frame of the animation a few |
| // times. The rest of the animation should run smoothly thereafter. |
| // The frames we draw here aren't visible because we are essentially just |
| // painting the screenshot as-is. |
| if (mode == MODE_COOL_DOWN) { |
| for (int i = 0; i < DEJANK_FRAMES; i++) { |
| draw(1.0f); |
| } |
| } |
| return true; |
| } |
| |
| private boolean tryPrepare() { |
| if (createSurface()) { |
| if (mMode == MODE_FADE) { |
| return true; |
| } |
| return createEglContext() |
| && createEglSurface() |
| && captureScreenshotTextureAndSetViewport(); |
| } |
| return false; |
| } |
| |
| /** |
| * Dismisses the electron beam animation surface and cleans up. |
| * |
| * To prevent stray photons from leaking out after the electron beam has been |
| * turned off, it is a good idea to defer dismissing the animation until the |
| * electron beam has been turned back on fully. |
| */ |
| public void dismiss() { |
| if (DEBUG) { |
| Slog.d(TAG, "dismiss"); |
| } |
| |
| destroyScreenshotTexture(); |
| destroyEglSurface(); |
| destroySurface(); |
| mPrepared = false; |
| } |
| |
| /** |
| * Draws an animation frame showing the electron beam activated at the |
| * specified level. |
| * |
| * @param level The electron beam level. |
| * @return True if successful. |
| */ |
| public boolean draw(float level) { |
| if (DEBUG) { |
| Slog.d(TAG, "drawFrame: level=" + level); |
| } |
| |
| if (!mPrepared) { |
| return false; |
| } |
| |
| if (mMode == MODE_FADE) { |
| return showSurface(1.0f - level); |
| } |
| |
| if (!attachEglContext()) { |
| return false; |
| } |
| try { |
| // Clear frame to solid black. |
| GLES10.glClearColor(0f, 0f, 0f, 1f); |
| GLES10.glClear(GLES10.GL_COLOR_BUFFER_BIT); |
| |
| // Draw the frame. |
| if (level < HSTRETCH_DURATION) { |
| drawHStretch(1.0f - (level / HSTRETCH_DURATION)); |
| } else { |
| drawVStretch(1.0f - ((level - HSTRETCH_DURATION) / VSTRETCH_DURATION)); |
| } |
| if (checkGlErrors("drawFrame")) { |
| return false; |
| } |
| |
| EGL14.eglSwapBuffers(mEglDisplay, mEglSurface); |
| } finally { |
| detachEglContext(); |
| } |
| return showSurface(1.0f); |
| } |
| |
| /** |
| * Draws a frame where the content of the electron beam is collapsing inwards upon |
| * itself vertically with red / green / blue channels dispersing and eventually |
| * merging down to a single horizontal line. |
| * |
| * @param stretch The stretch factor. 0.0 is no collapse, 1.0 is full collapse. |
| */ |
| private void drawVStretch(float stretch) { |
| // compute interpolation scale factors for each color channel |
| final float ar = scurve(stretch, 7.5f); |
| final float ag = scurve(stretch, 8.0f); |
| final float ab = scurve(stretch, 8.5f); |
| if (DEBUG) { |
| Slog.d(TAG, "drawVStretch: stretch=" + stretch |
| + ", ar=" + ar + ", ag=" + ag + ", ab=" + ab); |
| } |
| |
| // set blending |
| GLES10.glBlendFunc(GLES10.GL_ONE, GLES10.GL_ONE); |
| GLES10.glEnable(GLES10.GL_BLEND); |
| |
| // bind vertex buffer |
| GLES10.glVertexPointer(2, GLES10.GL_FLOAT, 0, mVertexBuffer); |
| GLES10.glEnableClientState(GLES10.GL_VERTEX_ARRAY); |
| |
| // set-up texturing |
| GLES10.glDisable(GLES10.GL_TEXTURE_2D); |
| GLES10.glEnable(GLES11Ext.GL_TEXTURE_EXTERNAL_OES); |
| |
| // bind texture and set blending for drawing planes |
| GLES10.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, mTexNames[0]); |
| GLES10.glTexEnvx(GLES10.GL_TEXTURE_ENV, GLES10.GL_TEXTURE_ENV_MODE, |
| mMode == MODE_WARM_UP ? GLES10.GL_MODULATE : GLES10.GL_REPLACE); |
| GLES10.glTexParameterx(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, |
| GLES10.GL_TEXTURE_MAG_FILTER, GLES10.GL_LINEAR); |
| GLES10.glTexParameterx(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, |
| GLES10.GL_TEXTURE_MIN_FILTER, GLES10.GL_LINEAR); |
| GLES10.glTexParameterx(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, |
| GLES10.GL_TEXTURE_WRAP_S, GLES10.GL_CLAMP_TO_EDGE); |
| GLES10.glTexParameterx(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, |
| GLES10.GL_TEXTURE_WRAP_T, GLES10.GL_CLAMP_TO_EDGE); |
| GLES10.glEnable(GLES11Ext.GL_TEXTURE_EXTERNAL_OES); |
| GLES10.glTexCoordPointer(2, GLES10.GL_FLOAT, 0, mTexCoordBuffer); |
| GLES10.glEnableClientState(GLES10.GL_TEXTURE_COORD_ARRAY); |
| |
| // draw the red plane |
| setVStretchQuad(mVertexBuffer, mDisplayWidth, mDisplayHeight, ar); |
| GLES10.glColorMask(true, false, false, true); |
| GLES10.glDrawArrays(GLES10.GL_TRIANGLE_FAN, 0, 4); |
| |
| // draw the green plane |
| setVStretchQuad(mVertexBuffer, mDisplayWidth, mDisplayHeight, ag); |
| GLES10.glColorMask(false, true, false, true); |
| GLES10.glDrawArrays(GLES10.GL_TRIANGLE_FAN, 0, 4); |
| |
| // draw the blue plane |
| setVStretchQuad(mVertexBuffer, mDisplayWidth, mDisplayHeight, ab); |
| GLES10.glColorMask(false, false, true, true); |
| GLES10.glDrawArrays(GLES10.GL_TRIANGLE_FAN, 0, 4); |
| |
| // clean up after drawing planes |
| GLES10.glDisable(GLES11Ext.GL_TEXTURE_EXTERNAL_OES); |
| GLES10.glDisableClientState(GLES10.GL_TEXTURE_COORD_ARRAY); |
| GLES10.glColorMask(true, true, true, true); |
| |
| // draw the white highlight (we use the last vertices) |
| if (mMode == MODE_COOL_DOWN) { |
| GLES10.glColor4f(ag, ag, ag, 1.0f); |
| GLES10.glDrawArrays(GLES10.GL_TRIANGLE_FAN, 0, 4); |
| } |
| |
| // clean up |
| GLES10.glDisableClientState(GLES10.GL_VERTEX_ARRAY); |
| GLES10.glDisable(GLES10.GL_BLEND); |
| } |
| |
| /** |
| * Draws a frame where the electron beam has been stretched out into |
| * a thin white horizontal line that fades as it expands outwards. |
| * |
| * @param stretch The stretch factor. 0.0 is no stretch / no fade, |
| * 1.0 is maximum stretch / maximum fade. |
| */ |
| private void drawHStretch(float stretch) { |
| // compute interpolation scale factor |
| final float ag = scurve(stretch, 8.0f); |
| if (DEBUG) { |
| Slog.d(TAG, "drawHStretch: stretch=" + stretch + ", ag=" + ag); |
| } |
| |
| if (stretch < 1.0f) { |
| // bind vertex buffer |
| GLES10.glVertexPointer(2, GLES10.GL_FLOAT, 0, mVertexBuffer); |
| GLES10.glEnableClientState(GLES10.GL_VERTEX_ARRAY); |
| |
| // draw narrow fading white line |
| setHStretchQuad(mVertexBuffer, mDisplayWidth, mDisplayHeight, ag); |
| GLES10.glColor4f(1.0f - ag, 1.0f - ag, 1.0f - ag, 1.0f); |
| GLES10.glDrawArrays(GLES10.GL_TRIANGLE_FAN, 0, 4); |
| |
| // clean up |
| GLES10.glDisableClientState(GLES10.GL_VERTEX_ARRAY); |
| } |
| } |
| |
| private static void setVStretchQuad(FloatBuffer vtx, float dw, float dh, float a) { |
| final float w = dw + (dw * a); |
| final float h = dh - (dh * a); |
| final float x = (dw - w) * 0.5f; |
| final float y = (dh - h) * 0.5f; |
| setQuad(vtx, x, y, w, h); |
| } |
| |
| private static void setHStretchQuad(FloatBuffer vtx, float dw, float dh, float a) { |
| final float w = dw + (dw * a); |
| final float h = 1.0f; |
| final float x = (dw - w) * 0.5f; |
| final float y = (dh - h) * 0.5f; |
| setQuad(vtx, x, y, w, h); |
| } |
| |
| private static void setQuad(FloatBuffer vtx, float x, float y, float w, float h) { |
| if (DEBUG) { |
| Slog.d(TAG, "setQuad: x=" + x + ", y=" + y + ", w=" + w + ", h=" + h); |
| } |
| vtx.put(0, x); |
| vtx.put(1, y); |
| vtx.put(2, x); |
| vtx.put(3, y + h); |
| vtx.put(4, x + w); |
| vtx.put(5, y + h); |
| vtx.put(6, x + w); |
| vtx.put(7, y); |
| } |
| |
| private boolean captureScreenshotTextureAndSetViewport() { |
| if (!attachEglContext()) { |
| return false; |
| } |
| try { |
| if (!mTexNamesGenerated) { |
| GLES10.glGenTextures(1, mTexNames, 0); |
| if (checkGlErrors("glGenTextures")) { |
| return false; |
| } |
| mTexNamesGenerated = true; |
| } |
| |
| SurfaceTexture st = new SurfaceTexture(mTexNames[0]); |
| SurfaceControl.screenshot(SurfaceControl.getBuiltInDisplay( |
| SurfaceControl.BUILT_IN_DISPLAY_ID_MAIN), |
| new Surface(st)); |
| |
| st.updateTexImage(); |
| st.getTransformMatrix(mTexMatrix); |
| |
| // Set up texture coordinates for a quad. |
| // We might need to change this if the texture ends up being |
| // a different size from the display for some reason. |
| mTexCoordBuffer.put(0, 0f); mTexCoordBuffer.put(1, 0f); |
| mTexCoordBuffer.put(2, 0f); mTexCoordBuffer.put(3, 1f); |
| mTexCoordBuffer.put(4, 1f); mTexCoordBuffer.put(5, 1f); |
| mTexCoordBuffer.put(6, 1f); mTexCoordBuffer.put(7, 0f); |
| |
| // Set up our viewport. |
| GLES10.glViewport(0, 0, mDisplayWidth, mDisplayHeight); |
| GLES10.glMatrixMode(GLES10.GL_PROJECTION); |
| GLES10.glLoadIdentity(); |
| GLES10.glOrthof(0, mDisplayWidth, 0, mDisplayHeight, 0, 1); |
| GLES10.glMatrixMode(GLES10.GL_MODELVIEW); |
| GLES10.glLoadIdentity(); |
| GLES10.glMatrixMode(GLES10.GL_TEXTURE); |
| GLES10.glLoadIdentity(); |
| GLES10.glLoadMatrixf(mTexMatrix, 0); |
| } finally { |
| detachEglContext(); |
| } |
| return true; |
| } |
| |
| private void destroyScreenshotTexture() { |
| if (mTexNamesGenerated) { |
| mTexNamesGenerated = false; |
| if (attachEglContext()) { |
| try { |
| GLES10.glDeleteTextures(1, mTexNames, 0); |
| checkGlErrors("glDeleteTextures"); |
| } finally { |
| detachEglContext(); |
| } |
| } |
| } |
| } |
| |
| private boolean createEglContext() { |
| if (mEglDisplay == null) { |
| mEglDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY); |
| if (mEglDisplay == EGL14.EGL_NO_DISPLAY) { |
| logEglError("eglGetDisplay"); |
| return false; |
| } |
| |
| int[] version = new int[2]; |
| if (!EGL14.eglInitialize(mEglDisplay, version, 0, version, 1)) { |
| mEglDisplay = null; |
| logEglError("eglInitialize"); |
| return false; |
| } |
| } |
| |
| if (mEglConfig == null) { |
| int[] eglConfigAttribList = new int[] { |
| EGL14.EGL_RED_SIZE, 8, |
| EGL14.EGL_GREEN_SIZE, 8, |
| EGL14.EGL_BLUE_SIZE, 8, |
| EGL14.EGL_ALPHA_SIZE, 8, |
| EGL14.EGL_NONE |
| }; |
| int[] numEglConfigs = new int[1]; |
| EGLConfig[] eglConfigs = new EGLConfig[1]; |
| if (!EGL14.eglChooseConfig(mEglDisplay, eglConfigAttribList, 0, |
| eglConfigs, 0, eglConfigs.length, numEglConfigs, 0)) { |
| logEglError("eglChooseConfig"); |
| return false; |
| } |
| mEglConfig = eglConfigs[0]; |
| } |
| |
| if (mEglContext == null) { |
| int[] eglContextAttribList = new int[] { |
| EGL14.EGL_NONE |
| }; |
| mEglContext = EGL14.eglCreateContext(mEglDisplay, mEglConfig, |
| EGL14.EGL_NO_CONTEXT, eglContextAttribList, 0); |
| if (mEglContext == null) { |
| logEglError("eglCreateContext"); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /* not used because it is too expensive to create / destroy contexts all of the time |
| private void destroyEglContext() { |
| if (mEglContext != null) { |
| if (!EGL14.eglDestroyContext(mEglDisplay, mEglContext)) { |
| logEglError("eglDestroyContext"); |
| } |
| mEglContext = null; |
| } |
| }*/ |
| |
| private boolean createSurface() { |
| if (mSurfaceSession == null) { |
| mSurfaceSession = new SurfaceSession(); |
| } |
| |
| SurfaceControl.openTransaction(); |
| try { |
| if (mSurfaceControl == null) { |
| try { |
| int flags; |
| if (mMode == MODE_FADE) { |
| flags = SurfaceControl.FX_SURFACE_DIM | SurfaceControl.HIDDEN; |
| } else { |
| flags = SurfaceControl.OPAQUE | SurfaceControl.HIDDEN; |
| } |
| mSurfaceControl = new SurfaceControl(mSurfaceSession, |
| "ElectronBeam", mDisplayWidth, mDisplayHeight, |
| PixelFormat.OPAQUE, flags); |
| } catch (SurfaceControl.OutOfResourcesException ex) { |
| Slog.e(TAG, "Unable to create surface.", ex); |
| return false; |
| } |
| } |
| |
| mSurfaceControl.setLayerStack(mDisplayLayerStack); |
| mSurfaceControl.setSize(mDisplayWidth, mDisplayHeight); |
| mSurface.copyFrom(mSurfaceControl); |
| |
| mSurfaceLayout = new NaturalSurfaceLayout(mDisplayManager, mSurfaceControl); |
| mSurfaceLayout.onDisplayTransaction(); |
| } finally { |
| SurfaceControl.closeTransaction(); |
| } |
| return true; |
| } |
| |
| private boolean createEglSurface() { |
| if (mEglSurface == null) { |
| int[] eglSurfaceAttribList = new int[] { |
| EGL14.EGL_NONE |
| }; |
| // turn our SurfaceControl into a Surface |
| mEglSurface = EGL14.eglCreateWindowSurface(mEglDisplay, mEglConfig, mSurface, |
| eglSurfaceAttribList, 0); |
| if (mEglSurface == null) { |
| logEglError("eglCreateWindowSurface"); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| private void destroyEglSurface() { |
| if (mEglSurface != null) { |
| if (!EGL14.eglDestroySurface(mEglDisplay, mEglSurface)) { |
| logEglError("eglDestroySurface"); |
| } |
| mEglSurface = null; |
| } |
| } |
| |
| private void destroySurface() { |
| if (mSurfaceControl != null) { |
| mSurfaceLayout.dispose(); |
| mSurfaceLayout = null; |
| SurfaceControl.openTransaction(); |
| try { |
| mSurfaceControl.destroy(); |
| mSurface.release(); |
| } finally { |
| SurfaceControl.closeTransaction(); |
| } |
| mSurfaceControl = null; |
| mSurfaceVisible = false; |
| mSurfaceAlpha = 0f; |
| } |
| } |
| |
| private boolean showSurface(float alpha) { |
| if (!mSurfaceVisible || mSurfaceAlpha != alpha) { |
| SurfaceControl.openTransaction(); |
| try { |
| mSurfaceControl.setLayer(ELECTRON_BEAM_LAYER); |
| mSurfaceControl.setAlpha(alpha); |
| mSurfaceControl.show(); |
| } finally { |
| SurfaceControl.closeTransaction(); |
| } |
| mSurfaceVisible = true; |
| mSurfaceAlpha = alpha; |
| } |
| return true; |
| } |
| |
| private boolean attachEglContext() { |
| if (mEglSurface == null) { |
| return false; |
| } |
| if (!EGL14.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) { |
| logEglError("eglMakeCurrent"); |
| return false; |
| } |
| return true; |
| } |
| |
| private void detachEglContext() { |
| if (mEglDisplay != null) { |
| EGL14.eglMakeCurrent(mEglDisplay, |
| EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_CONTEXT); |
| } |
| } |
| |
| /** |
| * Interpolates a value in the range 0 .. 1 along a sigmoid curve |
| * yielding a result in the range 0 .. 1 scaled such that: |
| * scurve(0) == 0, scurve(0.5) == 0.5, scurve(1) == 1. |
| */ |
| private static float scurve(float value, float s) { |
| // A basic sigmoid has the form y = 1.0f / FloatMap.exp(-x * s). |
| // Here we take the input datum and shift it by 0.5 so that the |
| // domain spans the range -0.5 .. 0.5 instead of 0 .. 1. |
| final float x = value - 0.5f; |
| |
| // Next apply the sigmoid function to the scaled value |
| // which produces a value in the range 0 .. 1 so we subtract |
| // 0.5 to get a value in the range -0.5 .. 0.5 instead. |
| final float y = sigmoid(x, s) - 0.5f; |
| |
| // To obtain the desired boundary conditions we need to scale |
| // the result so that it fills a range of -1 .. 1. |
| final float v = sigmoid(0.5f, s) - 0.5f; |
| |
| // And finally remap the value back to a range of 0 .. 1. |
| return y / v * 0.5f + 0.5f; |
| } |
| |
| private static float sigmoid(float x, float s) { |
| return 1.0f / (1.0f + FloatMath.exp(-x * s)); |
| } |
| |
| private static FloatBuffer createNativeFloatBuffer(int size) { |
| ByteBuffer bb = ByteBuffer.allocateDirect(size * 4); |
| bb.order(ByteOrder.nativeOrder()); |
| return bb.asFloatBuffer(); |
| } |
| |
| private static void logEglError(String func) { |
| Slog.e(TAG, func + " failed: error " + EGL14.eglGetError(), new Throwable()); |
| } |
| |
| private static boolean checkGlErrors(String func) { |
| return checkGlErrors(func, true); |
| } |
| |
| private static boolean checkGlErrors(String func, boolean log) { |
| boolean hadError = false; |
| int error; |
| while ((error = GLES10.glGetError()) != GLES10.GL_NO_ERROR) { |
| if (log) { |
| Slog.e(TAG, func + " failed: error " + error, new Throwable()); |
| } |
| hadError = true; |
| } |
| return hadError; |
| } |
| |
| public void dump(PrintWriter pw) { |
| pw.println(); |
| pw.println("Electron Beam State:"); |
| pw.println(" mPrepared=" + mPrepared); |
| pw.println(" mMode=" + mMode); |
| pw.println(" mDisplayLayerStack=" + mDisplayLayerStack); |
| pw.println(" mDisplayWidth=" + mDisplayWidth); |
| pw.println(" mDisplayHeight=" + mDisplayHeight); |
| pw.println(" mSurfaceVisible=" + mSurfaceVisible); |
| pw.println(" mSurfaceAlpha=" + mSurfaceAlpha); |
| } |
| |
| /** |
| * Keeps a surface aligned with the natural orientation of the device. |
| * Updates the position and transformation of the matrix whenever the display |
| * is rotated. This is a little tricky because the display transaction |
| * callback can be invoked on any thread, not necessarily the thread that |
| * owns the electron beam. |
| */ |
| private static final class NaturalSurfaceLayout implements DisplayTransactionListener { |
| private final DisplayManagerService mDisplayManager; |
| private SurfaceControl mSurfaceControl; |
| |
| public NaturalSurfaceLayout(DisplayManagerService displayManager, SurfaceControl surfaceControl) { |
| mDisplayManager = displayManager; |
| mSurfaceControl = surfaceControl; |
| mDisplayManager.registerDisplayTransactionListener(this); |
| } |
| |
| public void dispose() { |
| synchronized (this) { |
| mSurfaceControl = null; |
| } |
| mDisplayManager.unregisterDisplayTransactionListener(this); |
| } |
| |
| @Override |
| public void onDisplayTransaction() { |
| synchronized (this) { |
| if (mSurfaceControl == null) { |
| return; |
| } |
| |
| DisplayInfo displayInfo = mDisplayManager.getDisplayInfo(Display.DEFAULT_DISPLAY); |
| switch (displayInfo.rotation) { |
| case Surface.ROTATION_0: |
| mSurfaceControl.setPosition(0, 0); |
| mSurfaceControl.setMatrix(1, 0, 0, 1); |
| break; |
| case Surface.ROTATION_90: |
| mSurfaceControl.setPosition(0, displayInfo.logicalHeight); |
| mSurfaceControl.setMatrix(0, -1, 1, 0); |
| break; |
| case Surface.ROTATION_180: |
| mSurfaceControl.setPosition(displayInfo.logicalWidth, displayInfo.logicalHeight); |
| mSurfaceControl.setMatrix(-1, 0, 0, -1); |
| break; |
| case Surface.ROTATION_270: |
| mSurfaceControl.setPosition(displayInfo.logicalWidth, 0); |
| mSurfaceControl.setMatrix(0, 1, -1, 0); |
| break; |
| } |
| } |
| } |
| } |
| } |