GUI: Added new alphabitmap image type

1 files changed, 63 insertions, 2 deletions

diff --git a/gui/ThemeEngine.cpp b/gui/ThemeEngine.cpp
index 70ce07b211..1a648b44a0 100644
--- a/gui/ThemeEngine.cpp
+++ b/gui/ThemeEngine.cpp
@@ -31,6 +31,7 @@
 #include "graphics/cursorman.h"
 #include "graphics/fontman.h"
 #include "graphics/surface.h"
+#include "graphics/transparent_surface.h"
 #include "graphics/VectorRenderer.h"
 #include "graphics/fonts/bdf.h"
 #include "graphics/fonts/ttf.h"
@@ -309,7 +310,7 @@ void ThemeItemBitmap::drawSelf(bool draw, bool restore) {
 
 	if (draw) {
 		if (_alpha)
-			_engine->renderer()->blitAlphaBitmap(_bitmap, _area);
+			_engine->renderer()->blitKeyBitmap(_bitmap, _area);
 		else
 			_engine->renderer()->blitSubSurface(_bitmap, _area);
 	}
@@ -323,7 +324,7 @@ void ThemeItemBitmapClip::drawSelf(bool draw, bool restore) {
 
 	if (draw) {
 		if (_alpha)
-			_engine->renderer()->blitAlphaBitmapClip(_bitmap, _area, _clip);
+			_engine->renderer()->blitKeyBitmapClip(_bitmap, _area, _clip);
 		else
 			_engine->renderer()->blitSubSurfaceClip(_bitmap, _area, _clip);
 	}
@@ -402,6 +403,15 @@ ThemeEngine::~ThemeEngine() {
 	}
 	_bitmaps.clear();
 
+	for (AImagesMap::iterator i = _abitmaps.begin(); i != _abitmaps.end(); ++i) {
+		Graphics::TransparentSurface *surf = i->_value;
+		if (surf) {
+			surf->free();
+			delete surf;
+		}
+	}
+	_abitmaps.clear();
+
 	delete _parser;
 	delete _themeEval;
 	delete[] _cursor;
@@ -526,6 +536,15 @@ void ThemeEngine::refresh() {
 			}
 		}
 		_bitmaps.clear();
+
+		for (AImagesMap::iterator i = _abitmaps.begin(); i != _abitmaps.end(); ++i) {
+			Graphics::TransparentSurface *surf = i->_value;
+			if (surf) {
+				surf->free();
+				delete surf;
+			}
+		}
+		_abitmaps.clear();
 	}
 
 	init();
@@ -759,6 +778,48 @@ bool ThemeEngine::addBitmap(const Common::String &filename) {
 	return surf != 0;
 }
 
+bool ThemeEngine::addAlphaBitmap(const Common::String &filename) {
+	// Nothing has to be done if the bitmap already has been loaded.
+	Graphics::TransparentSurface *surf = _abitmaps[filename];
+	if (surf)
+		return true;
+
+	const Graphics::TransparentSurface *srcSurface = 0;
+
+	if (filename.hasSuffix(".png")) {
+		// Maybe it is PNG?
+#ifdef USE_PNG
+		Image::PNGDecoder decoder;
+		Common::ArchiveMemberList members;
+		_themeFiles.listMatchingMembers(members, filename);
+		for (Common::ArchiveMemberList::const_iterator i = members.begin(), end = members.end(); i != end; ++i) {
+			Common::SeekableReadStream *stream = (*i)->createReadStream();
+			if (stream) {
+				if (!decoder.loadStream(*stream))
+					error("Error decoding PNG");
+
+				srcSurface = new Graphics::TransparentSurface(*decoder.getSurface(), true);
+				delete stream;
+				if (srcSurface)
+					break;
+			}
+		}
+
+		if (srcSurface && srcSurface->format.bytesPerPixel != 1)
+			surf = srcSurface->convertTo(_overlayFormat);
+#else
+		error("No PNG support compiled in");
+#endif
+	} else {
+		error("Only PNG is supported as alphabitmap");
+	}
+
+	// Store the surface into our hashmap (attention, may store NULL entries!)
+	_abitmaps[filename] = surf;
+
+	return surf != 0;
+}
+
 bool ThemeEngine::addDrawData(const Common::String &data, bool cached) {
 	DrawData id = parseDrawDataId(data);