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engines/adl/display_a2.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/>.
+ *
+ */
+
+#include "adl/display.h"
+
+#ifndef ADL_DISPLAY_A2_H
+#define ADL_DISPLAY_A2_H
+
+namespace Adl {
+
+class Display_A2 : public Display {
+public:
+	Display_A2();
+	~Display_A2() override;
+
+	enum {
+		kGfxWidth = 280,
+		kGfxHeight = 192,
+		kGfxPitch = kGfxWidth / 7,
+		kGfxSize = kGfxPitch * kGfxHeight,
+		kTextWidth = 40,
+		kTextHeight = 24,
+		kSplitHeight = 32
+	};
+
+	void init() override;
+
+	// Graphics
+	uint getGfxWidth() const { return kGfxWidth; }
+	uint getGfxHeight() const { return kGfxHeight; }
+	uint getGfxPitch() const { return kGfxPitch; }
+	void loadFrameBuffer(Common::ReadStream &stream, byte *dst) const ;
+	void loadFrameBuffer(Common::ReadStream &stream);
+	void putPixel(const Common::Point &p, byte color);
+	void setPixelByte(const Common::Point &p, byte color);
+	void setPixelBit(const Common::Point &p, byte color);
+	void setPixelPalette(const Common::Point &p, byte color);
+	byte getPixelByte(const Common::Point &p) const;
+	bool getPixelBit(const Common::Point &p) const;
+	void clear(byte color);
+
+	// Text
+	char asciiToNative(char c) const override { return c | 0x80; }
+	void printChar(char c) override;
+	void showCursor(bool enable) override;
+
+protected:
+	class TextReader {
+	public:
+		static uint16 getBits(const Display_A2 *display, uint y, uint x) {
+			const uint charPos = (y >> 3) * kTextWidth + x;
+			byte m = display->_textBuf[charPos];
+			byte b = _font[m & 0x3f][y % 8];
+
+			if (display->_showCursor && charPos == display->_cursorPos) {
+				if (!display->_enableApple2eCursor) {
+					m = (m & 0x3f) | 0x40;
+				} else {
+					if (display->_blink) {
+						byte cursor[] = {
+							0x00, 0x00, 0x2a, 0x14,
+							0x2a, 0x14, 0x2a, 0x00
+						};
+
+						b = cursor[y % 8];
+					}
+				}
+			}
+
+			if (!(m & 0x80) && (!(m & 0x40) || display->_blink))
+				b = ~b;
+
+			return b & 0x7f;
+		}
+
+		static uint8 getStartY(const Display_A2 *display) {
+			if (display->_mode == kModeText)
+				return 0;
+			else
+				return kGfxHeight - kSplitHeight;
+		}
+
+		static uint8 getEndY(const Display_A2 *display) { return kGfxHeight; }
+	};
+
+	class GfxReader {
+	public:
+		static uint16 getBits(const Display_A2 *display, uint y, uint x) {
+			return display->_frameBuf[y * kGfxPitch + x];
+		}
+
+		static uint8 getStartY(const Display_A2 *display) { return 0; }
+
+		static uint8 getEndY(const Display_A2 *display) {
+			if (display->_mode == kModeGraphics)
+				return kGfxHeight;
+			else
+				return kGfxHeight - kSplitHeight;
+		}
+	};
+
+	byte *_frameBuf;
+	bool _showCursor;
+	bool _enableColor;
+	bool _enableScanlines;
+	bool _enableMonoText;
+	bool _enableApple2eCursor;
+	bool _blink;
+
+private:
+	void writeFrameBuffer(const Common::Point &p, byte color, byte mask);
+
+	static const byte _font[64][8];
+};
+
+Display_A2 *Display_A2_create();
+
+} // End of namespace Adl
+
+#endif