Initial revision

svn-id: r4785

1 files changed, 193 insertions, 0 deletions

diff --git a/scumm/gfx.h b/scumm/gfx.h
new file mode 100644
index 0000000000..bc858536a4
--- /dev/null
+++ b/scumm/gfx.h
@@ -0,0 +1,193 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001  Ludvig Strigeus
+ * Copyright (C) 2001/2002 The ScummVM project 
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#ifndef GFX_H
+#define GFX_H
+
+enum {
+	NUM_STRIPS = 40
+};
+
+enum VideoMode {		/* Video scalers */
+	VIDEO_SCALE = 0,
+	VIDEO_2XSAI = 1,
+	VIDEO_SUPERSAI = 2,
+	VIDEO_SUPEREAGLE = 3
+};
+
+enum {					/* Camera modes */
+	CM_NORMAL = 1,
+	CM_FOLLOW_ACTOR = 2,
+	CM_PANNING = 3
+};
+
+struct CameraData {		/* Camera state data */
+	ScummPoint _cur;
+	ScummPoint _dest;
+	ScummPoint _accel;
+	ScummPoint _last;
+	int _leftTrigger, _rightTrigger;
+	byte _follows, _mode;
+	bool _movingToActor;
+};
+
+
+struct VirtScreen {		/* Virtual screen areas */
+	int number;
+	uint16 unk1;
+	uint16 topline;
+	uint16 width, height;
+	uint16 size;
+	byte alloctwobuffers;
+	byte scrollable;
+	uint16 xstart;
+	uint16 tdirty[40];
+	uint16 bdirty[40];
+	byte *screenPtr;
+	byte *backBuf;
+};
+
+struct MouseCursor {	/* Mouse cursor */
+	int8 hotspot_x, hotspot_y;
+	byte colors[4];
+	byte data[32];
+};
+
+struct ColorCycle {		/* Palette cycles */
+	uint16 delay;
+	uint16 counter;
+	uint16 flags;
+	byte start;
+	byte end;
+};
+
+struct BlastObject {		/* BlastObjects to draw */
+	uint16 number, areaX, areaY, areaWidth, areaHeight;
+	int16 posX, posY;
+	uint16 width, height;
+	uint16 unk3, unk4, image;
+
+	uint16 mode;
+};
+
+#if !defined(__GNUC__)
+	#pragma START_PACK_STRUCTS
+#endif
+
+struct BompHeader {			/* Bomp header */
+	uint16 unk;
+	uint16 width, height;
+} GCC_PACK;
+
+#if !defined(__GNUC__)
+	#pragma END_PACK_STRUCTS
+#endif
+
+struct BompDrawData {		/* Bomp graphics data */
+	byte *out;
+	int outwidth, outheight;
+	int x, y;
+	byte scale_x, scale_y;
+	byte *dataptr;
+	int srcwidth, srcheight;
+};
+
+struct Gdi {
+	Scumm *_vm;
+
+	byte *_readPtr;
+	uint _readOffs;
+
+	int _numZBuffer;
+	int _imgBufOffs[4];
+	byte _disable_zbuffer;
+
+	bool _useOrDecompress;
+	int _numLinesToProcess;
+	int _tempNumLines;
+	byte _currentX;
+	byte _hotspot_x;
+	byte _hotspot_y;
+	byte _cursorActive;
+
+	int16 _drawMouseX;
+	int16 _drawMouseY;
+	int16 _mask_top, _mask_bottom, _mask_right, _mask_left;
+	byte _currentCursor;
+	byte _mouseColors[4];
+	byte _mouseColor;
+	byte _mouseClipMask1, _mouseClipMask2, _mouseClipMask3;
+	byte _mouseColorIndex;
+	byte *_mouseMaskPtr;
+	byte *_smap_ptr;
+	byte *_backbuff_ptr;
+	byte *_bgbak_ptr;
+	byte *_mask_ptr;
+	byte *_mask_ptr_dest;
+	byte *_z_plane_ptr;
+
+	byte _palette_mod;
+	byte _decomp_shr, _decomp_mask;
+	byte _transparency;
+	uint32 _vertStripNextInc;
+	byte *_backupIsWhere;
+
+	/* Bitmap decompressors */
+	void decompressBitmap();
+	void unkDecode1();
+	void unkDecode2();
+	void unkDecode3();
+	void unkDecode4();
+	void unkDecode5();
+	void unkDecode6();
+	void unkDecode7();
+	void unkDecode8();
+	void unkDecode9();
+	void unkDecode10();
+	void unkDecode11();
+
+	void drawBitmap(byte *ptr, VirtScreen *vs, int x, int y, int h, int stripnr, int numstrip, byte flag);
+	void clearUpperMask();
+
+	void disableZBuffer() { _disable_zbuffer++; }
+	void enableZBuffer() { _disable_zbuffer--; }
+
+	void draw8ColWithMasking();
+	void clear8ColWithMasking();
+	void clear8Col();
+	void decompressMaskImgOr();
+	void decompressMaskImg();
+
+	void resetBackground(int top, int bottom, int strip);
+	void drawStripToScreen(VirtScreen *vs, int x, int w, int t, int b);
+	void updateDirtyScreen(VirtScreen *vs);
+
+	enum DrawBitmapFlags {
+		dbAllowMaskOr = 1,
+		dbDrawMaskOnBoth = 2,
+		dbClear = 4
+	};
+};
+
+void blit(byte *dst, byte *src, int w, int h);
+
+#endif