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backends/graphics/atari/atari-screen.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 BACKENDS_GRAPHICS_ATARI_SCREEN_H
+#define BACKENDS_GRAPHICS_ATARI_SCREEN_H
+
+#include <unordered_set>
+#include <mint/ostruct.h>	// _RGB
+
+#include "common/ptr.h"
+
+#include "atari-cursor.h"
+#include "atari-surface.h"
+
+template<>
+struct std::hash<Common::Rect>
+{
+	std::size_t operator()(Common::Rect const& rect) const noexcept
+	{
+		return 31 * (31 * (31 * rect.left + rect.top) + rect.right) + rect.bottom;
+	}
+};
+
+class Palette {
+public:
+	void clear() {
+		memset(_data, 0, sizeof(_data));
+		entries = 0;
+	}
+
+	uint16 *const tt = reinterpret_cast<uint16*>(_data);
+	_RGB *const falcon = reinterpret_cast<_RGB*>(_data);
+
+	int entries = 0;
+
+private:
+	byte _data[256*4] = {};
+};
+
+struct Screen {
+	using DirtyRects = std::unordered_set<Common::Rect>;
+
+	Screen(bool tt, int width, int height, const Graphics::PixelFormat &format, const Palette *palette);
+
+	void reset(int width, int height, const Graphics::Surface &boundingSurf);
+	// must be called before any rectangle drawing
+	void addDirtyRect(const Graphics::Surface &srcSurface, int x, int y, int w, int h, bool directRendering);
+
+	void clearDirtyRects() {
+		dirtyRects.clear();
+		fullRedraw = false;
+	}
+
+	Common::ScopedPtr<AtariSurface> surf;
+	const Palette *palette;
+	DirtyRects dirtyRects;
+	bool fullRedraw = false;
+
+	Cursor cursor;
+
+	int rez = -1;
+	int mode = -1;
+	const Common::ScopedPtr<AtariSurface> &offsettedSurf = _offsettedSurf;
+
+private:
+	static constexpr size_t ALIGN = 16;	// 16 bytes
+
+	enum SteTtRezValue {
+		kRezValueSTLow  = 0,	// 320x200@4bpp, ST palette
+		kRezValueSTMid  = 1,	// 640x200@2bpp, ST palette
+		kRezValueSTHigh = 2,	// 640x400@1bpp, ST palette
+		kRezValueTTLow  = 7,	// 320x480@8bpp, TT palette
+		kRezValueTTMid  = 4,	// 640x480@4bpp, TT palette
+		kRezValueTTHigh = 6		// 1280x960@1bpp, TT palette
+	};
+
+	bool _tt;
+	Common::ScopedPtr<AtariSurface> _offsettedSurf;
+};
+
+#endif // BACKENDS_GRAPHICS_ATARI_SCREEN_H