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engines/glk/raw_decoder.h

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+/* 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 GLK_RAW_DECODER_H
+#define GLK_RAW_DECODER_H
+
+#include "graphics/palette.h"
+#include "graphics/surface.h"
+#include "image/image_decoder.h"
+
+namespace Glk {
+
+/**
+ * This image decoder class implements loading of a simplified image format.
+ * It's used for sub-engines like Frotz with custom picture formats. They can
+ * expose their picture archives using Common::Archive, and have the individual
+ * picture files stored in the format for this decoder to load
+ * Format:
+ * width		2 bytes
+ * height		2 bytes
+ * pal size		1 byte
+ * palette		3 bytes * pal size
+ * pixels		width * height pixels
+ */
+class RawDecoder : public Image::ImageDecoder {
+private:
+	Graphics::Surface _surface;
+	Graphics::Palette _palette;
+	uint32 _transColor;
+public:
+	RawDecoder();
+	~RawDecoder() override;
+
+	bool loadStream(Common::SeekableReadStream &stream) override;
+	void destroy() override;
+	const Graphics::Surface *getSurface() const override { return &_surface; }
+	const Graphics::Palette &getPalette() const override { return _palette; }
+	bool hasTransparentColor() const override { return true; }
+	uint32 getTransparentColor() const override { return _transColor; }
+};
+
+} // End of namespace Glk
+
+#endif