| /* |
| * 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.gallery3d.ui; |
| |
| import android.opengl.GLSurfaceView.EGLConfigChooser; |
| |
| import com.android.gallery3d.common.ApiHelper; |
| import com.android.gallery3d.glrenderer.GLCanvas; |
| |
| import javax.microedition.khronos.egl.EGL10; |
| import javax.microedition.khronos.egl.EGLConfig; |
| import javax.microedition.khronos.egl.EGLDisplay; |
| |
| /* |
| * The code is copied/adapted from |
| * <code>android.opengl.GLSurfaceView.BaseConfigChooser</code>. Here we try to |
| * choose a configuration that support RGBA_8888 format and if possible, |
| * with stencil buffer, but is not required. |
| */ |
| class GalleryEGLConfigChooser implements EGLConfigChooser { |
| |
| private static final String TAG = "GalleryEGLConfigChooser"; |
| |
| private final int mConfigSpec565[] = new int[] { |
| EGL10.EGL_RED_SIZE, 5, |
| EGL10.EGL_GREEN_SIZE, 6, |
| EGL10.EGL_BLUE_SIZE, 5, |
| EGL10.EGL_ALPHA_SIZE, 0, |
| EGL10.EGL_NONE |
| }; |
| |
| private final int mConfigSpec888[] = new int[] { |
| EGL10.EGL_RED_SIZE, 8, |
| EGL10.EGL_GREEN_SIZE, 8, |
| EGL10.EGL_BLUE_SIZE, 8, |
| EGL10.EGL_ALPHA_SIZE, 0, |
| EGL10.EGL_NONE |
| }; |
| |
| private final int mConfig2Spec565[] = new int[] { |
| EGL10.EGL_RED_SIZE, 5, |
| EGL10.EGL_GREEN_SIZE, 6, |
| EGL10.EGL_BLUE_SIZE, 5, |
| EGL10.EGL_ALPHA_SIZE, 0, |
| EGL10.EGL_RENDERABLE_TYPE, 4, /* EGL_OPENGL_ES2_BIT */ |
| EGL10.EGL_NONE |
| }; |
| |
| private final int mConfig2Spec888[] = new int[] { |
| EGL10.EGL_RED_SIZE, 8, |
| EGL10.EGL_GREEN_SIZE, 8, |
| EGL10.EGL_BLUE_SIZE, 8, |
| EGL10.EGL_ALPHA_SIZE, 0, |
| EGL10.EGL_RENDERABLE_TYPE, 4, /* EGL_OPENGL_ES2_BIT */ |
| EGL10.EGL_NONE |
| }; |
| |
| @Override |
| public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) { |
| int[] numConfig = new int[1]; |
| |
| int configSpec[]; |
| if (GLCanvas.getEGLContextClientVersion() == 2) { |
| configSpec = ApiHelper.USE_888_PIXEL_FORMAT ? mConfig2Spec888 : mConfig2Spec565; |
| } else { |
| configSpec = ApiHelper.USE_888_PIXEL_FORMAT ? mConfigSpec888 : mConfigSpec565; |
| } |
| if (!egl.eglChooseConfig(display, configSpec, null, 0, numConfig)) { |
| throw new RuntimeException("eglChooseConfig failed"); |
| } |
| |
| if (numConfig[0] <= 0) { |
| throw new RuntimeException("No configs match configSpec"); |
| } |
| |
| EGLConfig[] configs = new EGLConfig[numConfig[0]]; |
| if (!egl.eglChooseConfig(display, |
| configSpec, configs, configs.length, numConfig)) { |
| throw new RuntimeException(); |
| } |
| |
| return chooseConfig(egl, display, configs); |
| } |
| |
| private EGLConfig chooseConfig( |
| EGL10 egl, EGLDisplay display, EGLConfig configs[]) { |
| |
| EGLConfig result = null; |
| int minStencil = Integer.MAX_VALUE; |
| int value[] = new int[1]; |
| |
| // Because we need only one bit of stencil, try to choose a config that |
| // has stencil support but with smallest number of stencil bits. If |
| // none is found, choose any one. |
| for (int i = 0, n = configs.length; i < n; ++i) { |
| if (!ApiHelper.USE_888_PIXEL_FORMAT) { |
| if (egl.eglGetConfigAttrib( |
| display, configs[i], EGL10.EGL_RED_SIZE, value)) { |
| // Filter out ARGB 8888 configs. |
| if (value[0] == 8) continue; |
| } |
| } |
| if (egl.eglGetConfigAttrib( |
| display, configs[i], EGL10.EGL_STENCIL_SIZE, value)) { |
| if (value[0] == 0) continue; |
| if (value[0] < minStencil) { |
| minStencil = value[0]; |
| result = configs[i]; |
| } |
| } else { |
| throw new RuntimeException( |
| "eglGetConfigAttrib error: " + egl.eglGetError()); |
| } |
| } |
| if (result == null) result = configs[0]; |
| egl.eglGetConfigAttrib( |
| display, result, EGL10.EGL_STENCIL_SIZE, value); |
| logConfig(egl, display, result); |
| return result; |
| } |
| |
| private static final int[] ATTR_ID = { |
| EGL10.EGL_RED_SIZE, |
| EGL10.EGL_GREEN_SIZE, |
| EGL10.EGL_BLUE_SIZE, |
| EGL10.EGL_ALPHA_SIZE, |
| EGL10.EGL_DEPTH_SIZE, |
| EGL10.EGL_STENCIL_SIZE, |
| EGL10.EGL_CONFIG_ID, |
| EGL10.EGL_CONFIG_CAVEAT |
| }; |
| |
| private static final String[] ATTR_NAME = { |
| "R", "G", "B", "A", "D", "S", "ID", "CAVEAT" |
| }; |
| |
| private void logConfig(EGL10 egl, EGLDisplay display, EGLConfig config) { |
| int value[] = new int[1]; |
| StringBuilder sb = new StringBuilder(); |
| for (int j = 0; j < ATTR_ID.length; j++) { |
| egl.eglGetConfigAttrib(display, config, ATTR_ID[j], value); |
| sb.append(ATTR_NAME[j] + value[0] + " "); |
| } |
| Log.i(TAG, "Config chosen: " + sb.toString()); |
| } |
| } |