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engines/stark/visual/image.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 STARK_VISUAL_IMAGE_H
+#define STARK_VISUAL_IMAGE_H
+
+#include "engines/stark/visual/visual.h"
+
+#include "common/rect.h"
+#include "common/stream.h"
+
+namespace Graphics {
+struct Surface;
+}
+
+namespace Stark {
+
+namespace Gfx {
+class Driver;
+class SurfaceRenderer;
+class Bitmap;
+}
+
+/**
+ * XMG (still image) renderer
+ */
+class VisualImageXMG : public Visual {
+public:
+	static const VisualType TYPE = Visual::kImageXMG;
+
+	explicit VisualImageXMG(Gfx::Driver *gfx);
+	~VisualImageXMG() override;
+
+	/**
+	 * Load the pixel data from a XMG image
+	 */
+	void load(Common::ReadStream *stream);
+
+	/**
+	 * Load the size from an XMG image
+	 */
+	void readOriginalSize(Common::ReadStream *stream);
+
+	/**
+	 * Load the pixel data from a PNG image
+	 */
+	bool loadPNG(Common::SeekableReadStream *stream);
+
+	void render(const Common::Point &position, bool useOffset);
+	void render(const Common::Point &position, bool useOffset, bool unscaled);
+
+	/** Set an offset used when rendering */
+	void setHotSpot(const Common::Point &hotspot);
+	Common::Point getHotspot() const { return _hotspot; }
+
+	/**
+	 * The fade level is added to the color value of each pixel
+	 *
+	 * It is a value between -1 and 1
+	 */
+	void setFadeLevel(float fadeLevel);
+
+	/** Perform a transparency hit test on an image point */
+	bool isPointSolid(const Common::Point &point) const;
+
+	/** Get the width in pixels */
+	int getWidth() const;
+
+	/** Get the height in pixels */
+	int getHeight() const;
+
+	/** Get a read only pointer to the surface backing the image */
+	const Graphics::Surface *getSurface() const;
+
+private:
+	Graphics::Surface *multiplyColorWithAlpha(const Graphics::Surface *source);
+
+	Gfx::Driver *_gfx;
+	Gfx::SurfaceRenderer *_surfaceRenderer;
+	Gfx::Bitmap *_bitmap;
+	Graphics::Surface *_surface;
+	Common::Point _hotspot;
+	uint _originalWidth;
+	uint _originalHeight;
+};
+
+} // End of namespace Stark
+
+#endif // STARK_VISUAL_IMAGE_H