64 lines
2.3 KiB
Java
64 lines
2.3 KiB
Java
/*
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* Copyright 2018 devemux86
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*
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* This program is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.oscim.utils;
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/**
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* Utility class for graphics operations.
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*/
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public final class GraphicUtils {
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/**
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* Given the original image size, as well as width, height, percent parameters,
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* can compute the final image size.
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*
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* @param picWidth original image width
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* @param picHeight original image height
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* @param scaleFactor scale factor to screen DPI
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* @param width requested width (0: no change)
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* @param height requested height (0: no change)
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* @param percent requested scale percent (100: no change)
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*/
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public static float[] imageSize(float picWidth, float picHeight, float scaleFactor, int width, int height, int percent) {
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float bitmapWidth = picWidth * scaleFactor;
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float bitmapHeight = picHeight * scaleFactor;
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float aspectRatio = picWidth / picHeight;
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if (width != 0 && height != 0) {
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// both width and height set, override any other setting
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bitmapWidth = width;
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bitmapHeight = height;
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} else if (width == 0 && height != 0) {
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// only width set, calculate from aspect ratio
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bitmapWidth = height * aspectRatio;
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bitmapHeight = height;
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} else if (width != 0 && height == 0) {
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// only height set, calculate from aspect ratio
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bitmapHeight = width / aspectRatio;
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bitmapWidth = width;
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}
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if (percent != 100) {
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bitmapWidth *= percent / 100f;
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bitmapHeight *= percent / 100f;
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}
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return new float[]{bitmapWidth, bitmapHeight};
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}
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private GraphicUtils() {
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}
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}
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