/*
* Copyright (C) 2015 Jorge Ruesga
*
* 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.ruesga.android.wallpapers.photophase.transitions;
import android.content.Context;
import android.opengl.GLES20;
import android.opengl.Matrix;
import com.ruesga.android.wallpapers.photophase.PhotoFrame;
import com.ruesga.android.wallpapers.photophase.R;
import com.ruesga.android.wallpapers.photophase.textures.TextureManager;
import com.ruesga.android.wallpapers.photophase.transitions.Transitions.TRANSITIONS;
import com.ruesga.android.wallpapers.photophase.utils.GLESUtil;
import com.ruesga.android.wallpapers.photophase.utils.Utils;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* A transition that applies a cube effect transition to the picture.
*/
public class CubeTransition extends Transition {
/**
* The enumeration of all possibles window movements
*/
public enum WINDOW_MODES {
/**
* Open the picture from left to right
*/
LEFT_TO_RIGHT,
/**
* Open the picture from right to left
*/
RIGHT_TO_LEFT
}
private static final int[] VERTEX_SHADER = {R.raw.default_vertex_shader, R.raw.default_vertex_shader};
private static final int[] FRAGMENT_SHADER = {R.raw.default_fragment_shader, R.raw.default_fragment_shader};
private static final float TRANSITION_TIME = 1500.0f;
private static final float SCALE_AMOUNT = 0.2f;
private WINDOW_MODES mMode;
private FloatBuffer mPositionBuffer;
private final float[] mTranslationMatrix;
private float[] mVertex;
private float mAmount;
public CubeTransition(Context ctx, TextureManager tm) {
super(ctx, tm, VERTEX_SHADER, FRAGMENT_SHADER);
// Initialized
mTranslationMatrix = new float[16];
reset();
}
@Override
public TRANSITIONS getType() {
return TRANSITIONS.CUBE;
}
@Override
public float getTransitionTime() {
return TRANSITION_TIME;
}
@Override
public boolean hasTransitionTarget() {
return true;
}
@Override
public void select(PhotoFrame target) {
super.select(target);
mAmount = getAmount();
// Create the interal buffer
float[] vertex = target.getFrameVertex();
if (mPositionBuffer == null) {
// (# of coordinate values * 4 bytes per float)
ByteBuffer bb = ByteBuffer.allocateDirect(vertex.length * 4);
bb.order(ByteOrder.nativeOrder());
mPositionBuffer = bb.asFloatBuffer();
}
if (mVertex == null) {
mVertex = new float[vertex.length];
}
// choose a random mode
chooseMode();
}
@Override
public void chooseMode() {
List<WINDOW_MODES> modes = new ArrayList<>(Arrays.asList(WINDOW_MODES.values()));
int low = 0;
int high = modes.size() - 1;
mMode = modes.get(Utils.getNextRandom(low, high));
}
@Override
public void applyTransition(float delta, float[] matrix, float offset) {
if (delta < 1) {
applyDstTransition(delta, matrix, offset);
applySrcTransition(delta, matrix, offset);
} else {
applyFinalTransition(matrix);
}
}
private void applySrcTransition(float delta, float[] matrix, float offset) {
// Bind default FBO
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
GLESUtil.glesCheckError("glBindFramebuffer");
// Set the program
useProgram(0);
// Disable blending
GLES20.glDisable(GLES20.GL_BLEND);
GLESUtil.glesCheckError("glDisable");
// Set the input texture
int textureHandle = mTarget.getTextureHandle();
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLESUtil.glesCheckError("glActiveTexture");
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
GLESUtil.glesCheckError("glBindTexture");
GLES20.glUniform1i(mTextureHandlers[0], 0);
GLESUtil.glesCheckError("glBindTexture");
// Texture
FloatBuffer textureBuffer = mTarget.getTextureBuffer();
textureBuffer.position(0);
GLES20.glVertexAttribPointer(mTextureCoordHandlers[0], 2, GLES20.GL_FLOAT, false, 0, textureBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mTextureCoordHandlers[0]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Position
setInternalVertex();
float interpolation = delta > 0.5f
? 1 - delta
: delta;
float w = Math.abs(mVertex[6] - mVertex[4]);
switch (mMode) {
case RIGHT_TO_LEFT:
mVertex[1] -= interpolation * mAmount;
mVertex[5] += interpolation * mAmount;
mVertex[4] += w * delta;
mVertex[0] = mVertex[4];
break;
case LEFT_TO_RIGHT:
mVertex[3] -= interpolation * mAmount;
mVertex[7] += interpolation * mAmount;
mVertex[6] -= w * delta;
mVertex[2] = mVertex[6];
break;
default:
break;
}
mPositionBuffer.position(0);
mPositionBuffer.put(mVertex);
mPositionBuffer.position(0);
GLES20.glVertexAttribPointer(mPositionHandlers[0], 2, GLES20.GL_FLOAT, false, 0, mPositionBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mPositionHandlers[0]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Calculate the delta angle and the translation and rotate parameters
float angle = 0.0f;
float translateX = 0.0f;
float rotateY = 0.0f;
switch (mMode) {
case RIGHT_TO_LEFT:
angle = delta * 90;
rotateY = -1.0f;
translateX = mVertex[2] * -1;
break;
case LEFT_TO_RIGHT:
angle = delta * -90;
rotateY = -1.0f;
translateX = mVertex[0] * -1;
break;
default:
break;
}
// Apply the projection and view transformation
Matrix.setIdentityM(matrix, 0);
if (offset != 0.0f) {
Matrix.translateM(matrix, 0, offset, 0.0f, 0.0f);
}
Matrix.translateM(mTranslationMatrix, 0, matrix, 0, -translateX, 0.0f, 0.0f);
Matrix.rotateM(mTranslationMatrix, 0, mTranslationMatrix, 0, angle, 0.0f, rotateY, 0.0f);
Matrix.translateM(mTranslationMatrix, 0, mTranslationMatrix, 0, translateX, 0.0f, 0.0f);
GLES20.glUniformMatrix4fv(mMVPMatrixHandlers[0], 1, false, mTranslationMatrix, 0);
GLESUtil.glesCheckError("glUniformMatrix4fv");
// Draw
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
GLESUtil.glesCheckError("glDrawElements");
// Disable attributes
GLES20.glDisableVertexAttribArray(mPositionHandlers[0]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
GLES20.glDisableVertexAttribArray(mTextureCoordHandlers[0]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
}
private void applyDstTransition(float delta, float[] matrix, float offset) {
// Bind default FBO
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
GLESUtil.glesCheckError("glBindFramebuffer");
// Set the program
useProgram(1);
// Disable blending
GLES20.glDisable(GLES20.GL_BLEND);
GLESUtil.glesCheckError("glDisable");
// Set the input texture
int textureHandle = mTransitionTarget.getTextureHandle();
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLESUtil.glesCheckError("glActiveTexture");
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
GLESUtil.glesCheckError("glBindTexture");
GLES20.glUniform1i(mTextureHandlers[1], 0);
GLESUtil.glesCheckError("glBindTexture");
// Texture
FloatBuffer textureBuffer = mTransitionTarget.getTextureBuffer();
textureBuffer.position(0);
GLES20.glVertexAttribPointer(mTextureCoordHandlers[1], 2, GLES20.GL_FLOAT, false, 0, textureBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mTextureCoordHandlers[1]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Position
setInternalVertex();
float interpolation = delta > 0.5f
? 1 - delta
: delta;
float w = Math.abs(mVertex[6] - mVertex[4]);
switch (mMode) {
case LEFT_TO_RIGHT:
mVertex[1] -= interpolation * mAmount;
mVertex[5] += interpolation * mAmount;
mVertex[4] += w * (1 - delta);
mVertex[0] = mVertex[4];
break;
case RIGHT_TO_LEFT:
mVertex[3] -= interpolation * mAmount;
mVertex[7] += interpolation * mAmount;
mVertex[6] -= w * (1 - delta);
mVertex[2] = mVertex[6];
break;
default:
break;
}
mPositionBuffer.position(0);
mPositionBuffer.put(mVertex);
mPositionBuffer.position(0);
GLES20.glVertexAttribPointer(mPositionHandlers[1], 2, GLES20.GL_FLOAT, false, 0, mPositionBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mPositionHandlers[1]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Calculate the delta angle and the translation and rotate parameters
float angle = 0.0f;
float translateX = 0.0f;
float rotateY = 0.0f;
switch (mMode) {
case LEFT_TO_RIGHT:
angle = 90 - (delta * 90);
rotateY = -1.0f;
translateX = mVertex[2] * -1;
break;
case RIGHT_TO_LEFT:
angle = -90 + (delta * 90);
rotateY = -1.0f;
translateX = mVertex[0] * -1;
break;
default:
break;
}
// Apply the projection and view transformation
Matrix.setIdentityM(matrix, 0);
if (offset != 0.0f) {
Matrix.translateM(matrix, 0, offset, 0.0f, 0.0f);
}
Matrix.translateM(mTranslationMatrix, 0, matrix, 0, -translateX, 0.0f, 0.0f);
Matrix.rotateM(mTranslationMatrix, 0, mTranslationMatrix, 0, angle, 0.0f, rotateY, 0.0f);
Matrix.translateM(mTranslationMatrix, 0, mTranslationMatrix, 0, translateX, 0.0f, 0.0f);
GLES20.glUniformMatrix4fv(mMVPMatrixHandlers[1], 1, false, mTranslationMatrix, 0);
GLESUtil.glesCheckError("glUniformMatrix4fv");
// Draw
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
GLESUtil.glesCheckError("glDrawElements");
// Disable attributes
GLES20.glDisableVertexAttribArray(mPositionHandlers[1]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
GLES20.glDisableVertexAttribArray(mTextureCoordHandlers[1]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
}
private void applyFinalTransition(float[] matrix) {
// Bind default FBO
GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
GLESUtil.glesCheckError("glBindFramebuffer");
// Use our shader program
useProgram(1);
// Disable blending
GLES20.glDisable(GLES20.GL_BLEND);
GLESUtil.glesCheckError("glDisable");
// Apply the projection and view transformation
GLES20.glUniformMatrix4fv(mMVPMatrixHandlers[1], 1, false, matrix, 0);
GLESUtil.glesCheckError("glUniformMatrix4fv");
// Texture
FloatBuffer textureBuffer = mTransitionTarget.getTextureBuffer();
textureBuffer.position(0);
GLES20.glVertexAttribPointer(mTextureCoordHandlers[1], 2, GLES20.GL_FLOAT, false, 0, textureBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mTextureCoordHandlers[1]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Position
FloatBuffer positionBuffer = mTransitionTarget.getPositionBuffer();
positionBuffer.position(0);
GLES20.glVertexAttribPointer(mPositionHandlers[1], 2, GLES20.GL_FLOAT, false, 0, positionBuffer);
GLESUtil.glesCheckError("glVertexAttribPointer");
GLES20.glEnableVertexAttribArray(mPositionHandlers[1]);
GLESUtil.glesCheckError("glEnableVertexAttribArray");
// Set the input texture
int textureHandle = mTransitionTarget.getTextureHandle();
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLESUtil.glesCheckError("glActiveTexture");
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
GLESUtil.glesCheckError("glBindTexture");
GLES20.glUniform1i(mTextureHandlers[1], 0);
GLESUtil.glesCheckError("glUniform1i");
// Draw
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
GLESUtil.glesCheckError("glDrawElements");
// Disable attributes
GLES20.glDisableVertexAttribArray(mPositionHandlers[1]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
GLES20.glDisableVertexAttribArray(mTextureCoordHandlers[1]);
GLESUtil.glesCheckError("glDisableVertexAttribArray");
}
private void setInternalVertex() {
float[] originalVertex = mTarget.getFrameVertex();
System.arraycopy(originalVertex, 0, mVertex, 0, originalVertex.length);
}
private float getAmount() {
return ((mTarget.getFrameWidth() * SCALE_AMOUNT) / 2);
}
}