SLUDGE: Add the slusge specific image decoder

engines/sludge/backdrop.cpp

@@ -60,6 +60,7 @@
 #include "graphics/surface.h"
 #include "graphics/palette.h"
 #include "sludge.h"
+#include "bytearray.h"
 
 namespace Sludge {
 
@@ -82,7 +83,6 @@ GLuint snapshotTextureName = 0;
 
 Graphics::Surface backdropSurface;
 
-
 float snapTexW = 1.0;
 float snapTexH = 1.0;
 
@@ -1010,17 +1010,18 @@ bool loadParallax(unsigned short v, unsigned short fracX,
 
 extern int viewportOffsetX, viewportOffsetY;
 
-bool loadPng(int &picWidth, int &picHeight, int &realPicWidth,
-		int &realPicHeight, Common::SeekableReadStream *stream, bool reserve) {
-	debug(kSludgeDebugGraphics, "Loading back drop png.");
+bool loadPng(int &picWidth, int &picHeight, int &realPicWidth, int &realPicHeight, Common::SeekableReadStream *stream, bool reserve) {
+	debug(kSludgeDebugGraphics, "Loading back drop png at file position: %i", stream->pos());
 	::Image::PNGDecoder png;
 	if (!png.loadStream(*stream)) {
 		debug(kSludgeDebugGraphics, "Back drop is not a png");
 		return false;
 	}
-	backdropSurface.copyFrom(*(png.getSurface()));
-	const byte *palette = png.getPalette();
-	g_system->getPaletteManager()->setPalette(palette, 0, 256);
+	const Graphics::Surface *sourceSurface = png.getSurface();
+	Graphics::Surface *pngSurface = sourceSurface->convertTo(Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0), png.getPalette());
+	backdropSurface.copyFrom(*pngSurface);
+	pngSurface->free();
+	delete pngSurface;
 	picWidth = realPicWidth = backdropSurface.w;
 	picHeight = realPicHeight = backdropSurface.h;
 	return true;
@@ -1095,8 +1096,17 @@ bool loadPng(int &picWidth, int &picHeight, int &realPicWidth,
 #endif
 }
 
-bool loadByteArray(int &picWidth, int &picHeight, int &realPicWidth,
-		int &realPicHeight, Common::SeekableReadStream *stream, bool reserve) {
+bool loadByteArray(int &picWidth, int &picHeight, int &realPicWidth, int &realPicHeight, Common::SeekableReadStream *stream, bool reserve) {
+	debug(kSludgeDebugGraphics, "Loading back drop as a byte array at file position: %i", stream->pos());
+	ByteArrayDecoder byteDecoder;
+	if (!byteDecoder.loadStream(*stream)) {
+		debug(kSludgeDebugGraphics, "Back drop is not a byte array");
+		return false;
+	}
+	backdropSurface.copyFrom(*(byteDecoder.getSurface()));
+	picWidth = realPicWidth = backdropSurface.w;
+	picHeight = realPicHeight = backdropSurface.h;
+	return true;
 #if 0
 	int32_t transCol = reserve ? -1 : 63519;
 	int t1, t2, n;
@@ -1138,14 +1148,12 @@ bool loadByteArray(int &picWidth, int &picHeight, int &realPicWidth,
 #endif
 }
 
-bool loadImage(int &picWidth, int &picHeight, int &realPicWidth,
-		int &realPicHeight, Common::SeekableReadStream *stream, int x, int y,
-		bool reserve) {
+bool loadImage(int &picWidth, int &picHeight, int &realPicWidth, int &realPicHeight, Common::SeekableReadStream *stream, int x, int y, bool reserve) {
 	debug(kSludgeDebugGraphics, "Loading back drop image at file position: %i", stream->pos());
-	if (!loadPng(picWidth, picHeight, realPicWidth, realPicHeight, stream,
-			reserve)) {
-		if (!loadByteArray(picWidth, picHeight, realPicWidth, realPicHeight,
-				stream, reserve)) {
+	int32 start_ptr = stream->pos();
+	if (!loadPng(picWidth, picHeight, realPicWidth, realPicHeight, stream, reserve)) {
+		stream->seek(start_ptr);
+		if (!loadByteArray(picWidth, picHeight, realPicWidth, realPicHeight, stream, reserve)) {
 			debug(kSludgeDebugGraphics, "Back drop loading failed");
 			return false;
 		}

engines/sludge/bytearray.cpp

@@ -0,0 +1,90 @@
+/* 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 "common/stream.h"
+#include "common/debug.h"
+#include "graphics/surface.h"
+
+#include "allfiles.h"
+#include "bytearray.h"
+#include "colours.h"
+#include "sludge.h"
+
+namespace Sludge {
+
+ByteArrayDecoder::ByteArrayDecoder() : _surface(nullptr) {
+}
+
+ByteArrayDecoder::~ByteArrayDecoder() {
+	destroy();
+}
+
+void ByteArrayDecoder::destroy() {
+	if (_surface != nullptr) {
+		_surface->free();
+		delete _surface;
+		_surface = nullptr;
+	}
+}
+
+bool ByteArrayDecoder::loadStream(Common::SeekableReadStream &stream) {
+	destroy();
+	int32_t transCol = /*reserve ? -1 : */63519;
+	int n;
+	uint16 width = stream.readUint16BE();
+	debug(kSludgeDebugGraphics, "picWidth : %i", width);
+	uint16 height = stream.readUint16BE();
+	debug(kSludgeDebugGraphics, "picHeight : %i", height);
+
+	_surface = new Graphics::Surface();
+	_surface->create(width, height, Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0));
+	for (uint16 y = 0; y < height; y++) {
+		uint16 x = 0;
+		while (x < width) {
+			unsigned short c = (unsigned short)stream.readUint16BE();
+			if (c & 32) {
+				n = stream.readByte() + 1;
+				c -= 32;
+			} else {
+				n = 1;
+			}
+			while (n--) {
+				byte *target = (byte *)_surface->getBasePtr(x, y);
+				if (c == transCol || c == 2015) {
+					target[0] = (byte)0;
+					target[1] = (byte)0;
+					target[2] = (byte)0;
+					target[3] = (byte)0;
+				} else {
+					target[0] = (byte)255;
+					target[1] = (byte)blueValue(c);
+					target[2] = (byte)greenValue(c);
+					target[3] = (byte)redValue(c);
+				}
+				x++;
+			}
+		}
+	}
+	return true;
+}
+
+} // End of namespace Sludge

engines/sludge/bytearray.h

@@ -0,0 +1,48 @@
+/* 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 PRINCE_MHWANH_H
+#define PRINCE_MHWANH_H
+
+#include "image/image_decoder.h"
+#include "graphics/surface.h"
+
+namespace Sludge {
+
+class ByteArrayDecoder : public Image::ImageDecoder {
+
+public:
+	ByteArrayDecoder();
+	virtual ~ByteArrayDecoder();
+
+	// ImageDecoder API
+	void destroy();
+	virtual bool loadStream(Common::SeekableReadStream &stream);
+	virtual Graphics::Surface *getSurface() const { return _surface; }
+
+private:
+	Graphics::Surface *_surface;
+};
+
+} // End of namespace Sludge
+
+#endif

engines/sludge/main_loop.cpp

@@ -75,6 +75,7 @@
 #include "helpers.h"
 #include "graphics/surface.h"
 #include "common/debug.h"
+#include "sludge.h"
 
 namespace Sludge {
 
@@ -481,7 +482,6 @@ int main_loop(char *filename)
 		g_system->copyRectToScreen(backdropSurface.getPixels(),
 				backdropSurface.pitch, 0, 0, backdropSurface.w,
 				backdropSurface.h);
-		//g_system->getPaletteManager()->setPalette(_image->getPalette(), 0, 256);
 		g_system->updateScreen();
 		g_system->delayMillis(100);
 #if 0

engines/sludge/module.mk

@@ -4,6 +4,7 @@ MODULE_OBJS := \
 	backdrop.o \
 	bg_effects.o \
 	builtin.o \
+	bytearray.o \
 	console.o \
 	cursors.o \
 	debug.o \

engines/sludge/sludge.cpp

@@ -64,7 +64,8 @@ SludgeEngine::~SludgeEngine() {
  
 Common::Error SludgeEngine::run() {
 	// init graphics
-	initGraphics(640, 480, false);
+	Graphics::PixelFormat format = Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0);
+	initGraphics(640, 480, false, &format);
 
 	// create console
 	_console = new SludgeConsole(this);