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/*
* Copyright (C) 2013 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.filtershow.crop;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.graphics.Region;
import android.graphics.drawable.Drawable;
public abstract class CropDrawingUtils {
public static void drawRuleOfThird(Canvas canvas, RectF bounds) {
Paint p = new Paint();
p.setStyle(Paint.Style.STROKE);
p.setColor(Color.argb(128, 255, 255, 255));
p.setStrokeWidth(2);
float stepX = bounds.width() / 3.0f;
float stepY = bounds.height() / 3.0f;
float x = bounds.left + stepX;
float y = bounds.top + stepY;
for (int i = 0; i < 2; i++) {
canvas.drawLine(x, bounds.top, x, bounds.bottom, p);
x += stepX;
}
for (int j = 0; j < 2; j++) {
canvas.drawLine(bounds.left, y, bounds.right, y, p);
y += stepY;
}
}
public static void drawCropRect(Canvas canvas, RectF bounds) {
Paint p = new Paint();
p.setStyle(Paint.Style.STROKE);
p.setColor(Color.WHITE);
p.setStrokeWidth(3);
canvas.drawRect(bounds, p);
}
public static void drawIndicator(Canvas canvas, Drawable indicator, int indicatorSize,
float centerX, float centerY) {
int left = (int) centerX - indicatorSize / 2;
int top = (int) centerY - indicatorSize / 2;
indicator.setBounds(left, top, left + indicatorSize, top + indicatorSize);
indicator.draw(canvas);
}
public static void drawIndicators(Canvas canvas, Drawable cropIndicator, int indicatorSize,
RectF bounds, boolean fixedAspect, int selection) {
boolean notMoving = (selection == CropObject.MOVE_NONE);
if (fixedAspect) {
if ((selection == CropObject.TOP_LEFT) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.left, bounds.top);
}
if ((selection == CropObject.TOP_RIGHT) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.right, bounds.top);
}
if ((selection == CropObject.BOTTOM_LEFT) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.left, bounds.bottom);
}
if ((selection == CropObject.BOTTOM_RIGHT) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.right, bounds.bottom);
}
} else {
if (((selection & CropObject.MOVE_TOP) != 0) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.centerX(), bounds.top);
}
if (((selection & CropObject.MOVE_BOTTOM) != 0) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.centerX(), bounds.bottom);
}
if (((selection & CropObject.MOVE_LEFT) != 0) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.left, bounds.centerY());
}
if (((selection & CropObject.MOVE_RIGHT) != 0) || notMoving) {
drawIndicator(canvas, cropIndicator, indicatorSize, bounds.right, bounds.centerY());
}
}
}
public static void drawWallpaperSelectionFrame(Canvas canvas, RectF cropBounds, float spotX,
float spotY, Paint p, Paint shadowPaint) {
float sx = cropBounds.width() * spotX;
float sy = cropBounds.height() * spotY;
float cx = cropBounds.centerX();
float cy = cropBounds.centerY();
RectF r1 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy / 2);
float temp = sx;
sx = sy;
sy = temp;
RectF r2 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy / 2);
canvas.save();
canvas.clipRect(cropBounds);
canvas.clipRect(r1, Region.Op.DIFFERENCE);
canvas.clipRect(r2, Region.Op.DIFFERENCE);
canvas.drawPaint(shadowPaint);
canvas.restore();
Path path = new Path();
path.moveTo(r1.left, r1.top);
path.lineTo(r1.right, r1.top);
path.moveTo(r1.left, r1.top);
path.lineTo(r1.left, r1.bottom);
path.moveTo(r1.left, r1.bottom);
path.lineTo(r1.right, r1.bottom);
path.moveTo(r1.right, r1.top);
path.lineTo(r1.right, r1.bottom);
path.moveTo(r2.left, r2.top);
path.lineTo(r2.right, r2.top);
path.moveTo(r2.right, r2.top);
path.lineTo(r2.right, r2.bottom);
path.moveTo(r2.left, r2.bottom);
path.lineTo(r2.right, r2.bottom);
path.moveTo(r2.left, r2.top);
path.lineTo(r2.left, r2.bottom);
canvas.drawPath(path, p);
}
public static void drawShadows(Canvas canvas, Paint p, RectF innerBounds, RectF outerBounds) {
canvas.drawRect(outerBounds.left, outerBounds.top, innerBounds.right, innerBounds.top, p);
canvas.drawRect(innerBounds.right, outerBounds.top, outerBounds.right, innerBounds.bottom,
p);
canvas.drawRect(innerBounds.left, innerBounds.bottom, outerBounds.right,
outerBounds.bottom, p);
canvas.drawRect(outerBounds.left, innerBounds.top, innerBounds.left, outerBounds.bottom, p);
}
public static Matrix getBitmapToDisplayMatrix(RectF imageBounds, RectF displayBounds) {
Matrix m = new Matrix();
CropDrawingUtils.setBitmapToDisplayMatrix(m, imageBounds, displayBounds);
return m;
}
public static boolean setBitmapToDisplayMatrix(Matrix m, RectF imageBounds,
RectF displayBounds) {
m.reset();
return m.setRectToRect(imageBounds, displayBounds, Matrix.ScaleToFit.CENTER);
}
public static boolean setImageToScreenMatrix(Matrix dst, RectF image,
RectF screen, int rotation) {
RectF rotatedImage = new RectF();
dst.setRotate(rotation, image.centerX(), image.centerY());
if (!dst.mapRect(rotatedImage, image)) {
return false; // fails for rotations that are not multiples of 90
// degrees
}
boolean rToR = dst.setRectToRect(rotatedImage, screen, Matrix.ScaleToFit.CENTER);
boolean rot = dst.preRotate(rotation, image.centerX(), image.centerY());
return rToR && rot;
}
}
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