TITANIC: Added CRawSurface class

4 files changed, 202 insertions, 5 deletions

diff --git a/engines/titanic/module.mk b/engines/titanic/module.mk
index 377a22fbf8..f1a6c751df 100644
--- a/engines/titanic/module.mk
+++ b/engines/titanic/module.mk
@@ -474,6 +474,7 @@ MODULE_OBJS := \
 	support/movie_range_info.o \
 	support/movie_manager.o \
 	support/credit_text.o \
+	support/raw_surface.o \
 	support/rect.o \
 	support/screen_manager.o \
 	support/simple_file.o \
diff --git a/engines/titanic/support/raw_surface.cpp b/engines/titanic/support/raw_surface.cpp
new file mode 100644
index 0000000000..044bdb59c1
--- /dev/null
+++ b/engines/titanic/support/raw_surface.cpp
@@ -0,0 +1,133 @@
+/* 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 "titanic/support/raw_surface.h"
+#include "common/algorithm.h"
+
+namespace Titanic {
+
+CRawSurface::CRawSurface(Graphics::Surface *surface, TransparencyMode transMode) {
+	_width = surface->w;
+	_pixelsBaseP = (byte *)surface->getPixels();
+	_pixelsP = nullptr;
+	_pitch = 0;
+	_fieldC = 0;
+	_field10 = false;
+	_field18 = 0;
+	_field1C = 0xFF;
+
+	switch (transMode) {
+	case TRANS_MASK0:
+	case TRANS_ALPHA0:
+		_field1C = 0;
+		_field18 = 0xFF;
+		break;
+	case TRANS_MASK255:
+	case TRANS_ALPHA255:
+		_field1C = 0xFF;
+		_field18 = 0;
+		break;
+	case TRANS_DEFAULT:
+		if ((_pixelsBaseP[0] == 0 && _pixelsBaseP[2] < 0x80) ||
+				(_pixelsBaseP[0] != 0 && _pixelsBaseP[1] < 0x80)) {
+			_field18 = 0xFF;
+			_field1C = 0;
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+void CRawSurface::setRow(int yp) {
+	for (int y = 0; y < yp; ++yp) {
+		resetPitch();
+		skipPitch();
+	}
+}
+
+void CRawSurface::setCol(int xp) {
+	while (xp > 0)
+		xp -= moveX(xp);
+}
+
+void CRawSurface::skipPitch() {
+	setCol(_pitch);
+}
+
+int CRawSurface::moveX(int xp) {
+	if (_fieldC) {
+		if (!_field10) {
+			--_fieldC;
+			--_pitch;
+			++_pixelsP;
+			return 1;
+		}
+	} else {
+		while (!*_pixelsBaseP) {
+			_fieldC = *++_pixelsBaseP;
+			++_pixelsBaseP;
+
+			if (_fieldC) {
+				_pixelsP = _pixelsBaseP;
+				_pixelsBaseP += _fieldC;
+				if (_fieldC & 1)
+					++_pixelsBaseP;
+
+				_field10 = 0;
+				--_pitch;
+				--_fieldC;
+				return 1;
+			}
+		}
+
+		_fieldC = *_pixelsBaseP++;
+		++_pixelsBaseP;
+		_field10 = true;
+	}
+
+	if (xp < 0 || xp > _pitch)
+		xp = _pitch;
+
+	int len = MIN(_fieldC, xp);
+	_pitch -= len;
+	_fieldC -= len;
+	return len;
+}
+
+uint CRawSurface::getPixel() const {
+	return _field18 ? 0xFF - *_pixelsP : *_pixelsP;
+}
+
+bool CRawSurface::isPixelTransparent1() const {
+	return _field18 ? *_pixelsP == 0xF0 : *_pixelsP == 0x10;
+}
+
+bool CRawSurface::isPixelTransparent2() const {
+	return _field18 ? *_pixelsP == 0xF0 : *_pixelsP == 0x10;
+}
+
+void CRawSurface::resetPitch() {
+	_pitch = _width;
+}
+
+} // End of namespace Titanic
diff --git a/engines/titanic/support/raw_surface.h b/engines/titanic/support/raw_surface.h
new file mode 100644
index 0000000000..c0d98ad4d0
--- /dev/null
+++ b/engines/titanic/support/raw_surface.h
@@ -0,0 +1,67 @@
+/* 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.
+ *
+ */
+
+#ifndef TITANIC_RAW_SURFACE_H
+#define TITANIC_RAW_SURFACE_H
+
+#include "graphics/surface.h"
+
+namespace Titanic {
+
+enum TransparencyMode {
+	TRANS_MASK0 = 0, TRANS_MASK255 = 1, TRANS_ALPHA0 = 2,
+	TRANS_ALPHA255 = 3, TRANS_DEFAULT = 4
+};
+
+class CRawSurface {
+private:
+	byte *_pixelsBaseP;
+	byte *_pixelsP;
+	int _pitch;
+	int _fieldC;
+	bool _field10;
+	int _width;
+	int _field18;
+	int _field1C;
+private:
+	int moveX(int xp);
+public:
+	CRawSurface(Graphics::Surface *surface, TransparencyMode transMode);
+
+	void setRow(int yp);
+
+	void setCol(int xp);
+
+	void skipPitch();
+
+	uint getPixel() const;
+
+	bool isPixelTransparent1() const;
+
+	bool isPixelTransparent2() const;
+
+	void resetPitch();
+};
+
+} // End of namespace Titanic
+
+#endif /* TITANIC_RAW_SURFACE_H */
diff --git a/engines/titanic/support/video_surface.h b/engines/titanic/support/video_surface.h
index c21149333d..ad868d87ba 100644
--- a/engines/titanic/support/video_surface.h
+++ b/engines/titanic/support/video_surface.h
@@ -30,17 +30,13 @@
 #include "titanic/support/direct_draw.h"
 #include "titanic/support/movie.h"
 #include "titanic/support/movie_range_info.h"
+#include "titanic/support/raw_surface.h"
 #include "titanic/support/rect.h"
 #include "titanic/core/list.h"
 #include "titanic/core/resource_key.h"
 
 namespace Titanic {
 
-enum TransparencyMode {
-	TRANS_MASK0 = 0, TRANS_MASK255 = 1, TRANS_ALPHA0 = 2,
-	TRANS_ALPHA255 = 3, TRANS_DEFAULT = 4
-};
-
 class CScreenManager;
 class CJPEGDecode;
 class CTargaDecode;