1 files changed, 94 insertions, 0 deletions
diff --git a/src/bandanalyser.cpp b/src/bandanalyser.cpp
new file mode 100644
index 0000000..df61a51
--- /dev/null
+++ b/src/bandanalyser.cpp
@@ -0,0 +1,94 @@
+/*
+ * 	bandanalyser.cpp		(C) 2006, Aurélien Croc (AP²C)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ * 
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the
+ *  Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ *  $Id: bandanalyser.cpp 60 2006-12-14 01:03:17Z ap2c $
+ *
+ */
+#include "bandanalyser.h"
+#include "band.h"
+#include "error.h"
+
+
+/*
+ * Vérification si les bandes sont vides
+ * Check if bands are empty
+ */
+void checkEmptyBand(Band *band)
+{
+	const unsigned char *data;
+	size_t i, size, last;
+	unsigned char c;
+
+	data = band->band();
+	size = (band->width() * band->height() + 7) >> 3;
+	last = size % sizeof(unsigned long);
+	size -= last;
+
+	for (i=0; i < size; i += sizeof(unsigned long))
+	       if (~*((unsigned long *)&data[i]) != 0) {
+		       return;
+	       }
+	for (; i < last + size; i++) {
+		c = ~data[i];
+		if (c != 0)
+			return;
+	}
+	band->setEmpty();
+}
+
+void correctBlackColor(Band *bandC, Band *bandM, Band *bandY, Band *bandB)
+{
+	unsigned char *cyan, *magenta, *yellow, *black;
+	unsigned long i;
+	size_t size, last;
+
+	cyan = bandC->band();
+	magenta = bandM->band();
+	yellow = bandY->band();
+	black = bandB->band();
+
+	size = (bandC->width() * bandC->height() + 7) >> 3;
+	last = size % sizeof(unsigned long);
+	size -= last;
+
+	for (i=0; i < size; i += sizeof(unsigned long)) {
+		unsigned long mask;
+
+		mask = *((unsigned long *)&cyan[i]) | 
+			*((unsigned long *)&magenta[i]) | 
+			*((unsigned long *)&yellow[i]);
+		if (~mask == 0)
+			continue;
+		
+		*((unsigned long *)&cyan[i]) |= ~mask;
+		*((unsigned long *)&magenta[i]) |= ~mask;
+		*((unsigned long *)&yellow[i]) |= ~mask;
+		*((unsigned long *)&black[i]) &= mask;
+	}
+	
+	for (; i < last + size; i++) {
+		unsigned char mask;
+
+		mask = cyan[i] | magenta[i] | yellow[i];
+		if (mask == 0xFF)
+			continue;
+		cyan[i] |= ~mask;
+		magenta[i] |= ~mask;
+		yellow[i] |= ~mask;
+		black[i] &= mask;
+	}
+}