aboutsummaryrefslogtreecommitdiff
path: root/engines/tinsel/palette.h
blob: 9743ee53aafd88302599017856dbb65d3b6e000b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
/* 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 * Palette Allocator Definitions
 */

#ifndef TINSEL_PALETTE_H	// prevent multiple includes
#define TINSEL_PALETTE_H

#include "tinsel/dw.h"

namespace Tinsel {

typedef	uint32	COLORREF;

#define TINSEL_RGB(r,g,b)	((COLORREF)TO_LE_32(((uint8)(r)|((uint16)(g)<<8))|(((uint32)(uint8)(b))<<16)))

#define TINSEL_GetRValue(rgb)	((uint8)(FROM_LE_32(rgb)))
#define TINSEL_GetGValue(rgb)	((uint8)(((uint16)(FROM_LE_32(rgb)))>>8))
#define TINSEL_GetBValue(rgb)	((uint8)((FROM_LE_32(rgb))>>16))

#define TINSEL_PSX_RGB(r,g,b) ((uint16)(((uint8)(r))|((uint16)(g)<<5)|(((uint16)(b))<<10)))

enum {
	MAX_COLOURS		= 256,	///< maximum number of colours - for VGA 256
	BITS_PER_PIXEL	= 8,	///< number of bits per pixel for VGA 256
	MAX_INTENSITY	= 255,	///< the biggest value R, G or B can have
	NUM_PALETTES	= 32,	///< number of palettes

	// Discworld has some fixed apportioned bits in the palette.
	BGND_DAC_INDEX	= 0,	///< index of background colour in Video DAC
	FGND_DAC_INDEX	= 1,	///< index of first foreground colour in Video DAC
	TBLUE1			= 228,	///< Blue used in translucent rectangles
	TBLUE2			= 229,	///< Blue used in translucent rectangles
	TBLUE3			= 230,	///< Blue used in translucent rectangles
	TBLUE4			= 231,	///< Blue used in translucent rectangles
	TALKFONT_COL	= 233
};

// some common colours

#define	BLACK	(TINSEL_RGB(0, 0, 0))
#define	WHITE	(TINSEL_RGB(MAX_INTENSITY, MAX_INTENSITY, MAX_INTENSITY))
#define	RED		(TINSEL_RGB(MAX_INTENSITY, 0, 0))
#define	GREEN	(TINSEL_RGB(0, MAX_INTENSITY, 0))
#define	BLUE	(TINSEL_RGB(0, 0, MAX_INTENSITY))
#define	YELLOW	(TINSEL_RGB(MAX_INTENSITY, MAX_INTENSITY, 0))
#define	MAGENTA	(TINSEL_RGB(MAX_INTENSITY, 0, MAX_INTENSITY))
#define	CYAN	(TINSEL_RGB(0, MAX_INTENSITY, MAX_INTENSITY))


#include "common/pack-start.h"	// START STRUCT PACKING

/** hardware palette structure */
struct PALETTE {
	int32 numColours;		///< number of colours in the palette
	COLORREF palRGB[MAX_COLOURS];	///< actual palette colours
} PACKED_STRUCT;

#include "common/pack-end.h"	// END STRUCT PACKING


/** palette queue structure */
struct PALQ {
	SCNHANDLE hPal;		///< handle to palette data struct
	int objCount;		///< number of objects using this palette
	int posInDAC;		///< palette position in the video DAC
	int numColours;		///< number of colours in the palette
	// Discworld 2 fields
	bool bFading;		// Whether or not fading
	COLORREF palRGB[MAX_COLOURS];	// actual palette colours
};

#define	PALETTE_MOVED	0x8000	// when this bit is set in the "posInDAC"
				// field - the palette entry has moved

// Translucent objects have NULL pPal
#define	HasPalMoved(pPal) (((pPal) != NULL) && ((pPal)->posInDAC & PALETTE_MOVED))


/*----------------------------------------------------------------------*\
|*			Palette Manager Function Prototypes		*|
\*----------------------------------------------------------------------*/

void ResetPalAllocator();	// wipe out all palettes

#ifdef	DEBUG
void PaletteStats();	// Shows the maximum number of palettes used at once
#endif

void psxPaletteMapper(PALQ *originalPal, uint8 *psxClut, byte *mapperTable); // Maps PSX CLUTs to original palette in resource file

void PalettesToVideoDAC();	// Update the video DAC with palettes currently the the DAC queue

void UpdateDACqueueHandle(
	int posInDAC,		// position in video DAC
	int numColours,		// number of colours in palette
	SCNHANDLE hPalette);	// handle to palette

void UpdateDACqueue(		// places a palette in the video DAC queue
	int posInDAC,		// position in video DAC
	int numColours,		// number of colours in palette
	COLORREF *pColours);	// list of RGB tripples

void UpdateDACqueue(int posInDAC, COLORREF color);

PALQ *AllocPalette(		// allocate a new palette
	SCNHANDLE hNewPal);	// palette to allocate

void FreePalette(		// free a palette allocated with "AllocPalette"
	PALQ *pFreePal);	// palette queue entry to free

PALQ *FindPalette(		// find a palette in the palette queue
	SCNHANDLE hSrchPal);	// palette to search for

void SwapPalette(		// swaps palettes at the specified palette queue position
	PALQ *pPalQ,		// palette queue position
	SCNHANDLE hNewPal);	// new palette

PALQ *GetNextPalette(		// returns the next palette in the queue
	PALQ *pStrtPal);	// queue position to start from - when NULL will start from beginning of queue

COLORREF GetBgndColour();	// returns current background colour

void SetBgndColour(		// sets current background colour
	COLORREF colour);	// colour to set the background to

void FadingPalette(PALQ *pPalQ, bool bFading);

void CreateTranslucentPalette(SCNHANDLE BackPal);

void CreateGhostPalette(SCNHANDLE hPalette);

void NoFadingPalettes();	// All fading processes have just been killed

void DimPartPalette(
	SCNHANDLE hPal,
	int startColour,
	int length,
	int brightness);	// 0 = black, 10 == 100%


int TranslucentColour();

#define BoxColour TranslucentColour

int HighlightColour();

int TalkColour();

void SetTalkColourRef(COLORREF colRef);

COLORREF GetTalkColourRef();

void SetTagColorRef(COLORREF colRef);

COLORREF GetTagColorRef();

void SetTalkTextOffset(int offset);

void SetTranslucencyOffset(int offset);

} // End of namespace Tinsel

#endif	// TINSEL_PALETTE_H