Initial commit

graphics/image-archive.h

@@ -0,0 +1,63 @@
+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef GRAPHICS_IMAGE_ARCHIVE_H
+#define GRAPHICS_IMAGE_ARCHIVE_H
+
+#include "common/hashmap.h"
+#include "common/path.h"
+
+namespace Common {
+class Archive;
+}
+
+namespace Graphics {
+struct Surface;
+
+/**
+ * Helper class for loading PNG images from zip files.
+ */
+class ImageArchive {
+public:
+	~ImageArchive();
+
+	/* Frees all previously loaded images. */
+	void reset();
+
+	/* Open a new zip archive, after closing the previous one. */
+	bool setImageArchive(const Common::Path &fname);
+
+	/* Retrieve an image from the cache, or load it from the archive if it hasn't been loaded previously. */
+	const Surface *getImageSurface(const Common::Path &fname) {
+		return getImageSurface(fname, 0, 0);
+	}
+	const Surface *getImageSurface(const Common::Path &fname, int w, int h);
+
+private:
+#ifdef USE_PNG
+	Common::HashMap<Common::Path, Surface *, Common::Path::IgnoreCase_Hash, Common::Path::IgnoreCase_EqualTo> _imageCache;
+#endif
+	Common::Archive *_imageArchive = nullptr;
+};
+
+} // End of namespace Graphics
+
+#endif