diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/crop/CropDrawingUtils.java')
| -rw-r--r-- | src/com/android/gallery3d/filtershow/crop/CropDrawingUtils.java | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/crop/CropDrawingUtils.java b/src/com/android/gallery3d/filtershow/crop/CropDrawingUtils.java new file mode 100644 index 000000000..b0d324cbb --- /dev/null +++ b/src/com/android/gallery3d/filtershow/crop/CropDrawingUtils.java @@ -0,0 +1,168 @@ +/* + * 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; + } + +} |