diff options
Diffstat (limited to 'src/com/android/gallery3d/ui/SlideshowView.java')
-rw-r--r-- | src/com/android/gallery3d/ui/SlideshowView.java | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ui/SlideshowView.java b/src/com/android/gallery3d/ui/SlideshowView.java new file mode 100644 index 000000000..79a6bf080 --- /dev/null +++ b/src/com/android/gallery3d/ui/SlideshowView.java @@ -0,0 +1,165 @@ +/* + * Copyright (C) 2010 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 com.android.gallery3d.anim.CanvasAnimation; +import com.android.gallery3d.anim.FloatAnimation; + +import android.graphics.Bitmap; +import android.graphics.PointF; + +import java.util.Random; +import javax.microedition.khronos.opengles.GL11; + +public class SlideshowView extends GLView { + @SuppressWarnings("unused") + private static final String TAG = "SlideshowView"; + + private static final int SLIDESHOW_DURATION = 3500; + private static final int TRANSITION_DURATION = 1000; + + private static final float SCALE_SPEED = 0.20f ; + private static final float MOVE_SPEED = SCALE_SPEED; + + private int mCurrentRotation; + private BitmapTexture mCurrentTexture; + private SlideshowAnimation mCurrentAnimation; + + private int mPrevRotation; + private BitmapTexture mPrevTexture; + private SlideshowAnimation mPrevAnimation; + + private final FloatAnimation mTransitionAnimation = + new FloatAnimation(0, 1, TRANSITION_DURATION); + + private Random mRandom = new Random(); + + public void next(Bitmap bitmap, int rotation) { + + mTransitionAnimation.start(); + + if (mPrevTexture != null) { + mPrevTexture.getBitmap().recycle(); + mPrevTexture.recycle(); + } + + mPrevTexture = mCurrentTexture; + mPrevAnimation = mCurrentAnimation; + mPrevRotation = mCurrentRotation; + + mCurrentRotation = rotation; + mCurrentTexture = new BitmapTexture(bitmap); + if (((rotation / 90) & 0x01) == 0) { + mCurrentAnimation = new SlideshowAnimation( + mCurrentTexture.getWidth(), mCurrentTexture.getHeight(), + mRandom); + } else { + mCurrentAnimation = new SlideshowAnimation( + mCurrentTexture.getHeight(), mCurrentTexture.getWidth(), + mRandom); + } + mCurrentAnimation.start(); + + invalidate(); + } + + public void release() { + if (mPrevTexture != null) { + mPrevTexture.recycle(); + mPrevTexture = null; + } + if (mCurrentTexture != null) { + mCurrentTexture.recycle(); + mCurrentTexture = null; + } + } + + @Override + protected void render(GLCanvas canvas) { + long currentTimeMillis = canvas.currentAnimationTimeMillis(); + boolean requestRender = mTransitionAnimation.calculate(currentTimeMillis); + GL11 gl = canvas.getGLInstance(); + gl.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE); + float alpha = mPrevTexture == null ? 1f : mTransitionAnimation.get(); + + if (mPrevTexture != null && alpha != 1f) { + requestRender |= mPrevAnimation.calculate(currentTimeMillis); + canvas.save(GLCanvas.SAVE_FLAG_ALPHA | GLCanvas.SAVE_FLAG_MATRIX); + canvas.setAlpha(1f - alpha); + mPrevAnimation.apply(canvas); + canvas.rotate(mPrevRotation, 0, 0, 1); + mPrevTexture.draw(canvas, -mPrevTexture.getWidth() / 2, + -mPrevTexture.getHeight() / 2); + canvas.restore(); + } + if (mCurrentTexture != null) { + requestRender |= mCurrentAnimation.calculate(currentTimeMillis); + canvas.save(GLCanvas.SAVE_FLAG_ALPHA | GLCanvas.SAVE_FLAG_MATRIX); + canvas.setAlpha(alpha); + mCurrentAnimation.apply(canvas); + canvas.rotate(mCurrentRotation, 0, 0, 1); + mCurrentTexture.draw(canvas, -mCurrentTexture.getWidth() / 2, + -mCurrentTexture.getHeight() / 2); + canvas.restore(); + } + if (requestRender) invalidate(); + gl.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_ALPHA); + } + + private class SlideshowAnimation extends CanvasAnimation { + private final int mWidth; + private final int mHeight; + + private final PointF mMovingVector; + private float mProgress; + + public SlideshowAnimation(int width, int height, Random random) { + mWidth = width; + mHeight = height; + mMovingVector = new PointF( + MOVE_SPEED * mWidth * (random.nextFloat() - 0.5f), + MOVE_SPEED * mHeight * (random.nextFloat() - 0.5f)); + setDuration(SLIDESHOW_DURATION); + } + + @Override + public void apply(GLCanvas canvas) { + int viewWidth = getWidth(); + int viewHeight = getHeight(); + + float initScale = Math.min(2f, Math.min((float) + viewWidth / mWidth, (float) viewHeight / mHeight)); + float scale = initScale * (1 + SCALE_SPEED * mProgress); + + float centerX = viewWidth / 2 + mMovingVector.x * mProgress; + float centerY = viewHeight / 2 + mMovingVector.y * mProgress; + + canvas.translate(centerX, centerY, 0); + canvas.scale(scale, scale, 0); + } + + @Override + public int getCanvasSaveFlags() { + return GLCanvas.SAVE_FLAG_MATRIX; + } + + @Override + protected void onCalculate(float progress) { + mProgress = progress; + } + } +} |