GRAPHICS: Implemented utility function to print PixelFormat

3 files changed, 100 insertions, 0 deletions

diff --git a/graphics/module.mk b/graphics/module.mk
index 2705322c79..b6919cf1ab 100644
--- a/graphics/module.mk
+++ b/graphics/module.mk
@@ -12,6 +12,7 @@ MODULE_OBJS := \
 	fonts/ttf.o \
 	fonts/winfont.o \
 	maccursor.o \
+	pixelformat.o \
 	primitives.o \
 	scaler.o \
 	scaler/thumbnail_intern.o \
diff --git a/graphics/pixelformat.cpp b/graphics/pixelformat.cpp
new file mode 100644
index 0000000000..e7b5401ed6
--- /dev/null
+++ b/graphics/pixelformat.cpp
@@ -0,0 +1,96 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "graphics/pixelformat.h"
+#include "common/debug.h"
+
+namespace Graphics {
+
+Common::String PixelFormat::toString() {
+	if (bytesPerPixel == 1)
+		return "CLUT8";
+
+	int component[4];
+	char tmp[10];
+	tmp[0] = tmp[1] = 0;
+
+	component[0] = rShift;
+	component[1] = gShift;
+	component[2] = bShift;
+	component[3] = aShift;
+
+	Common::String letters, digits;
+
+	for (int c = 0; c < 4; c++) {
+		int compPos = -1;
+		int minshift = 100;
+
+		// Find minimal component
+		for (int i = 0; i < 4; i++)
+			if (component[i] >= 0 && component[i] < minshift) {
+				minshift = component[i];
+				compPos = i;
+			}
+
+		// Clean duplicates
+		for (int i = 0; i < 4; i++)
+			if (component[i] == minshift)
+				component[i] = -1;
+
+		switch (compPos) {
+		case 0:
+			if (rLoss != 8) {
+				letters += "R";
+				tmp[0] = '0' + 8 - rLoss;
+				digits += tmp;
+			}
+			break;
+		case 1:
+			if (gLoss != 8) {
+				letters += "G";
+				tmp[0] = '0' + 8 - gLoss;
+				digits += tmp;
+			}
+			break;
+		case 2:
+			if (bLoss != 8) {
+				letters += "B";
+				tmp[0] = '0' + 8 - bLoss;
+				digits += tmp;
+			}
+			break;
+		case 3:
+			if (aLoss != 8) {
+				letters += "A";
+				tmp[0] = '0' + 8 - aLoss;
+				digits += tmp;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+
+	return letters + digits;
+}
+
+} // End of namespace Graphics
diff --git a/graphics/pixelformat.h b/graphics/pixelformat.h
index 00db6702fc..3e6c53b05f 100644
--- a/graphics/pixelformat.h
+++ b/graphics/pixelformat.h
@@ -24,6 +24,7 @@
 #define GRAPHICS_PIXELFORMAT_H
 
 #include "common/scummsys.h"
+#include "common/str.h"
 
 namespace Graphics {
 
@@ -260,6 +261,8 @@ struct PixelFormat {
 		// Unsupported
 		return 0;
 	}
+
+	Common::String toString();
 };
 
 } // End of namespace Graphics