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backends/platform/psp/image_viewer.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 PSP_IMAGE_VIEWER_H
+#define PSP_IMAGE_VIEWER_H
+
+#include "engines/engine.h"  // for PauseToken
+
+class InputHandler;
+
+class ImageViewer : public DisplayClient {
+public:
+	enum Event {
+		EVENT_NONE = -1,
+		EVENT_HIDE = 0,
+		EVENT_SHOW = 1,
+		EVENT_ZOOM_IN,
+		EVENT_ZOOM_OUT,
+		EVENT_MOVE_LEFT,
+		EVENT_MOVE_UP,
+		EVENT_MOVE_RIGHT,
+		EVENT_MOVE_DOWN,
+		EVENT_MOVE_STOP,
+		EVENT_NEXT_IMAGE,
+		EVENT_LAST_IMAGE,
+	};
+
+private:
+	Buffer *_buffer;
+	Palette *_palette;
+	GuRenderer *_renderer;
+	bool _visible;
+	bool _dirty;
+	bool _init;
+	uint32 _imageNum;	// current image number
+	float _zoomFactor;	// how much we're zooming in/out on the image
+	float _visibleHeight, _visibleWidth;
+	float _centerX, _centerY;
+	Event _movement;
+	PauseToken _pauseToken;
+
+	InputHandler *_inputHandler;
+	DisplayManager *_displayManager;
+
+	void setFullScreenImageParams();
+	void loadNextImage();
+	void loadLastImage();
+	void setViewerButtons(bool active);
+	void setConstantRendererOptions();
+	void moveImageX(float val);
+	void moveImageY(float val);
+	bool load(int imageNum);
+	void unload();
+	void runLoop(); // to get total pausing we have to do our own loop
+
+	void setZoom(float value);
+	void setOffsetParams();
+	void modifyZoom(bool up);	// up or down
+	void setVisible(bool visible);
+
+public:
+
+	ImageViewer() : _buffer(0), _palette(0), _visible(false),
+					_dirty(false), _init(false), _imageNum(0),
+					_zoomFactor(0.0f), _visibleHeight(0.0f), _visibleWidth(0.0f),
+					_centerX(0.0f), _centerY(0.0f), _movement(EVENT_MOVE_STOP),
+					_inputHandler(0), _displayManager(0) {}
+	~ImageViewer() { unload(); }	// deallocate images
+	bool load();
+	void render();
+	bool isVisible() { return _visible; }
+	bool isDirty() { return _dirty; }
+	void setDirty() { _dirty = true; }
+	void setClean() { if (!_visible) // otherwise we want to keep rendering
+							_dirty = false;
+	}
+	void resetOnEngineDone();
+
+	void handleEvent(uint32 event);
+
+	// pointer setters
+	void setInputHandler(InputHandler *inputHandler) { _inputHandler = inputHandler; }
+	void setDisplayManager(DisplayManager *displayManager) { _displayManager = displayManager; }
+};
+
+#endif /* PSP_IMAGE_VIEWER_H */