* MagickBitmapSource.cpp
* zxing
*
- * Created by Ralf Kistner on 16/10/2009.
- * Copyright 2008 ZXing authors All rights reserved.
+ * Copyright 2010 ZXing authors All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
using namespace Magick;
+namespace zxing {
+
MagickBitmapSource::MagickBitmapSource(Image& image) : image_(image) {
width = image.columns();
height = image.rows();
}
-int MagickBitmapSource::getWidth() {
+int MagickBitmapSource::getWidth() const {
return width;
}
-int MagickBitmapSource::getHeight() {
+int MagickBitmapSource::getHeight() const {
return height;
}
-unsigned char MagickBitmapSource::getPixel(int x, int y) {
- const PixelPacket* p = pixel_cache + y * width + x;
- // We assume 16 bit values here
- return (unsigned char)((((int)p->red + (int)p->green + (int)p->blue) >> 8) / 3);
+unsigned char* MagickBitmapSource::getRow(int y, unsigned char* row) {
+ int width = getWidth();
+ if (row == NULL) {
+ row = new unsigned char[width];
+ }
+ for (int x = 0; x < width; x++) {
+ const PixelPacket* p = pixel_cache + y * width + x;
+ // We assume 16 bit values here
+ // 0x200 = 1<<9, half an lsb of the result to force rounding
+ row[x] = (unsigned char)((306 * ((int)p->red >> 8) + 601 * ((int)p->green >> 8) +
+ 117 * ((int)p->blue >> 8) + 0x200) >> 10);
+ }
+ return row;
+
+}
+
+/** This is a more efficient implementation. */
+unsigned char* MagickBitmapSource::getMatrix() {
+ int width = getWidth();
+ int height = getHeight();
+ unsigned char* matrix = new unsigned char[width*height];
+ unsigned char* m = matrix;
+ const Magick::PixelPacket* p = pixel_cache;
+ for (int y = 0; y < height; y++) {
+ for (int x = 0; x < width; x++) {
+ *m = (unsigned char)((306 * ((int)p->red >> 8) + 601 * ((int)p->green >> 8) +
+ 117 * ((int)p->blue >> 8) + 0x200) >> 10);
+ m++;
+ p++;
+ }
+ }
+ return matrix;
+}
+
+bool MagickBitmapSource::isRotateSupported() const {
+ return false;
}
+
+Ref<LuminanceSource> MagickBitmapSource::rotateCounterClockwise() {
+ //TODO(flyashi): add rotated image support.
+ /* this segfaults. I tried a few things, none seemed to work. Perhaps the problem is elsewhere? */
+ /*
+ Magick::Image rotated(image_);
+ rotated.modifyImage();
+ rotated.rotate(90); // Image::rotate takes CCW degrees as an argument
+ rotated.syncPixels();
+ return Ref<MagickBitmapSource> (new MagickBitmapSource(rotated));
+ */
+ return Ref<MagickBitmapSource> (NULL);
+}
+
+}
+