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119 lines
3.1 KiB
C++
119 lines
3.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef GRAPHICS_SCREEN_H
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#define GRAPHICS_SCREEN_H
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#include "graphics/managed_surface.h"
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#include "graphics/pixelformat.h"
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#include "common/list.h"
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#include "common/rect.h"
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namespace Graphics {
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#define PALETTE_COUNT 256
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#define PALETTE_SIZE (256 * 3)
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/**
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* Implements a specialised surface that represents the screen.
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* It keeps track of any areas of itself that are updated by drawing
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* calls, and provides an update that method that blits the affected
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* areas to the physical screen
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*/
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class Screen : public ManagedSurface {
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private:
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/**
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* List of affected areas of the screen
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*/
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Common::List<Common::Rect> _dirtyRects;
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private:
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/**
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* Merges together overlapping dirty areas of the screen
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*/
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void mergeDirtyRects();
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/**
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* Returns the union of two dirty area rectangles
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*/
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bool unionRectangle(Common::Rect &destRect, const Common::Rect &src1, const Common::Rect &src2);
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protected:
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/**
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* Adds a rectangle to the list of modified areas of the screen during the
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* current frame
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*/
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virtual void addDirtyRect(const Common::Rect &r);
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public:
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Screen();
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Screen(int width, int height);
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Screen(int width, int height, PixelFormat pixelFormat);
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/**
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* Returns true if there are any pending screen updates (dirty areas)
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*/
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bool isDirty() const { return !_dirtyRects.empty(); }
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/**
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* Marks the whole screen as dirty. This forces the next call to update
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* to copy the entire screen contents
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*/
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void makeAllDirty();
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/**
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* Clear the current dirty rects list
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*/
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virtual void clearDirtyRects() { _dirtyRects.clear(); }
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/**
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* Updates the screen by copying any affected areas to the system
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*/
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virtual void update();
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/**
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* Return the currently active palette
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*/
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void getPalette(byte palette[PALETTE_SIZE]);
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/**
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* Return a portion of the currently active palette
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*/
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void getPalette(byte *palette, uint start, uint num);
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/**
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* Set the palette
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*/
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void setPalette(const byte palette[PALETTE_SIZE]);
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/**
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* Set a subsection of the palette
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*/
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void setPalette(const byte *palette, uint start, uint num);
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/**
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* Clears the current palette, setting all entries to black
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*/
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void clearPalette();
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};
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} // End of namespace Graphics
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#endif
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