Android的UI工具包

/* * Copyright (C) 2011 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.ex.carousel; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.Rect; import android.renderscript.*; import static android.renderscript.Element.*; import android.renderscript.RenderScript.RSMessageHandler; import android.util.Log; /** * This is a support class for Carousel renderscript. It handles most of the low-level interactions * with Renderscript as well as dispatching events. * */ public class CarouselRS { private static final int DEFAULT_VISIBLE_SLOTS = 1; private static final int DEFAULT_CARD_COUNT = 0; private static final int DEFAULT_ROW_COUNT = 1; // Client messages *** THIS LIST MUST MATCH THOSE IN carousel.rs *** public static final int CMD_CARD_SELECTED = 100; public static final int CMD_DETAIL_SELECTED = 105; public static final int CMD_CARD_LONGPRESS = 110; public static final int CMD_REQUEST_TEXTURE = 200; public static final int CMD_INVALIDATE_TEXTURE = 210; public static final int CMD_REQUEST_GEOMETRY = 300; public static final int CMD_INVALIDATE_GEOMETRY = 310; public static final int CMD_ANIMATION_STARTED = 400; public static final int CMD_ANIMATION_FINISHED = 500; public static final int CMD_REQUEST_DETAIL_TEXTURE = 600; public static final int CMD_INVALIDATE_DETAIL_TEXTURE = 610; public static final int CMD_PING = 1000; // for debugging // Drag models *** THIS LIST MUST MATCH THOSE IN carousel.rs *** public static final int DRAG_MODEL_SCREEN_DELTA = 0; public static final int DRAG_MODEL_PLANE = 1; public static final int DRAG_MODEL_CYLINDER_INSIDE = 2; public static final int DRAG_MODEL_CYLINDER_OUTSIDE = 3; public static final int FILL_DIRECTION_CCW = +1; public static final int FILL_DIRECTION_CW = -1; private static final String TAG = "CarouselRS"; private static final int DEFAULT_SLOT_COUNT = 10; private static final Allocation.MipmapControl MIPMAP = Allocation.MipmapControl.MIPMAP_NONE; private static final boolean DBG = false; private RenderScriptGL mRS; private Resources mRes; private ScriptC_carousel mScript; private ScriptField_Card mCards; private ScriptField_FragmentShaderConstants_s mFSConst; private ScriptField_ProgramStore_s mProgramStoresCard; private ProgramFragment mSingleTextureFragmentProgram; private ProgramFragment mSingleTextureBlendingFragmentProgram; private ProgramFragment mMultiTextureFragmentProgram; private ProgramFragment mMultiTextureBlendingFragmentProgram; private ProgramVertex mVertexProgram; private ProgramRaster mRasterProgram; private Allocation[] mAllocationPool; private boolean mForceBlendCardsWithZ; private int mVisibleSlots; private int mRowCount; private int mPrefetchCardCount; private CarouselCallback mCallback; private float[] mEyePoint = new float[] { 2.0f, 0.0f, 0.0f }; private float[] mAtPoint = new float[] { 0.0f, 0.0f, 0.0f }; private float[] mUp = new float[] { 0.0f, 1.0f, 0.0f }; private static final String mSingleTextureShader = new String( "varying vec2 varTex0;" + "void main() {" + "vec2 t0 = varTex0.xy;" + "vec4 col = texture2D(UNI_Tex0, t0);" + "gl_FragColor = col; " + "}"); private static final String mSingleTextureBlendingShader = new String( "varying vec2 varTex0;" + "void main() {" + "vec2 t0 = varTex0.xy;" + "vec4 col = texture2D(UNI_Tex0, t0);" + "gl_FragColor = col * UNI_overallAlpha; " + "}"); private static final String mMultiTextureShader = new String( "varying vec2 varTex0;" + "void main() {" + "vec2 t0 = varTex0.xy;" + "vec4 col = texture2D(UNI_Tex0, t0);" + "vec4 col2 = texture2D(UNI_Tex1, t0);" + "gl_FragColor = mix(col, col2, UNI_fadeAmount);}"); private static final String mMultiTextureBlendingShader = new String( "varying vec2 varTex0;" + "void main() {" + "vec2 t0 = varTex0.xy;" + "vec4 col = texture2D(UNI_Tex0, t0);" + "vec4 col2 = texture2D(UNI_Tex1, t0);" + "gl_FragColor = mix(col, col2, UNI_fadeAmount) * UNI_overallAlpha;" + "}" ); public static interface CarouselCallback { /** * Called when a card is selected * @param n the id of the card */ void onCardSelected(int n); /** * Called when the detail texture for a card is tapped * @param n the id of the card * @param x how far the user tapped from the left edge of the card, in pixels * @param y how far the user tapped from the top edge of the card, in pixels */ void onDetailSelected(int n, int x, int y); /** * Called when a card is long-pressed * @param n the id of the card * @param touchPosition position of where the user pressed, in screen coordinates * @param detailCoordinates position of detail texture, in screen coordinates */ void onCardLongPress(int n, int touchPosition[], Rect detailCoordinates); /** * Called when texture is needed for card n. This happens when the given card becomes * visible. * @param n the id of the card */ void onRequestTexture(int n); /** * Called when a texture is no longer needed for card n. This happens when the card * goes out of view. * @param n the id of the card */ void onInvalidateTexture(int n); /** * Called when detail texture is needed for card n. This happens when the given card * becomes visible. * @param n the id of the card */ void onRequestDetailTexture(int n); /** * Called when a detail texture is no longer needed for card n. This happens when the card * goes out of view. * @param n the id of the card */ void onInvalidateDetailTexture(int n); /** * Called when geometry is needed for card n. * @param n the id of the card. */ void onRequestGeometry(int n); /** * Called when geometry is no longer needed for card n. This happens when the card goes * out of view. * @param n the id of the card */ void onInvalidateGeometry(int n); /** * Called when card animation (e.g. a fling) has started. */ void onAnimationStarted(); /** * Called when card animation has stopped. * @param carouselRotationAngle the angle of rotation, in radians, at which the animation * stopped. */ void onAnimationFinished(float carouselRotationAngle); }; private RSMessageHandler mRsMessage = new RSMessageHandler() { public void run() { if (mCallback == null) return; switch (mID) { case CMD_CARD_SELECTED: mCallback.onCardSelected(mData[0]); break; case CMD_DETAIL_SELECTED: mCallback.onDetailSelected(mData[0