2 * MagickBitmapSource.cpp
5 * Created by Ralf Kistner on 16/10/2009.
6 * Copyright 2008 ZXing authors All rights reserved.
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
21 #include "MagickBitmapSource.h"
25 using namespace Magick;
27 MagickBitmapSource::MagickBitmapSource(Image& image) : image_(image) {
28 width = image.columns();
29 height = image.rows();
31 pixel_cache = image.getConstPixels(0, 0, width, height);
34 MagickBitmapSource::~MagickBitmapSource() {
38 int MagickBitmapSource::getWidth() {
42 int MagickBitmapSource::getHeight() {
46 unsigned char MagickBitmapSource::getPixel(int x, int y) {
47 const PixelPacket* p = pixel_cache + y * width + x;
48 // We assume 16 bit values here
50 //return (unsigned char)((((int)p->red + (int)p->green + (int)p->blue) >> 8) / 3);
52 return (unsigned char)((306 * ((int)p->red >> 8) + 601 * ((int)p->green >> 8) + 117 * ((int)p->blue >> 8)) >> 10);
55 /** This is a more efficient implementation. */
56 unsigned char* MagickBitmapSource::copyMatrix() {
57 int width = getWidth();
58 int height = getHeight();
59 unsigned char* matrix = new unsigned char[width*height];
60 unsigned char* m = matrix;
61 const Magick::PixelPacket* p = pixel_cache;
62 for (int y = 0; y < height; y++) {
63 for (int x = 0; x < width; x++) {
64 *m = (unsigned char)((306 * ((int)p->red >> 8) + 601 * ((int)p->green >> 8) + 117 * ((int)p->blue >> 8)) >> 10);