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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 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.
*
* $URL$
* $Id$
*
*/
#include "lure/lure.h"
#include "lure/palette.h"
#include "common/util.h"
namespace Lure {
// Constructor
// Defaults the palette to a full 256 entry palette
Palette::Palette() {
_numEntries = GAME_COLOURS;
_palette = Memory::allocate(_numEntries * 4);
_palette->empty();
}
// Consructor
// Sets up a palette with the given number of entries and a copy of the passed data
Palette::Palette(uint16 srcNumEntries, const byte *srcData, PaletteSource paletteSource) {
_numEntries = srcNumEntries;
_palette = Memory::allocate(_numEntries * 4);
if (srcData) {
if (paletteSource == RGB64)
convertRgb64Palette(srcData, _numEntries);
else if (paletteSource == EGA) {
assert((srcNumEntries == 16) || (srcNumEntries == 17));
convertEGAPalette(srcData);
} else
_palette->copyFrom(srcData, 0, 0, _numEntries * 4);
} else {
// No data provided, set a null palette
_palette->empty();
}
}
// Constructor
// Makes a copy of a passed palette object
Palette::Palette(Palette &src) {
_numEntries = src.numEntries();
_palette = Memory::duplicate(src._palette);
}
// Constructor
// Loads a palette from a resource
Palette::Palette(uint16 resourceId, PaletteSource paletteSource) {
Disk &disk = Disk::getReference();
bool isEGA = LureEngine::getReference().isEGA();
MemoryBlock *srcData = disk.getEntry(resourceId);
if (paletteSource == DEFAULT)
paletteSource = isEGA ? EGA : RGB64;
switch (paletteSource) {
case EGA:
// Handle EGA palette
if ((srcData->size() != 16) && (srcData->size() != 17))
error("Specified resource %d is not a palette", resourceId);
_numEntries = 16;
_palette = Memory::allocate(_numEntries * 4);
convertEGAPalette(srcData->data());
break;
case RGB64:
if (((srcData->size() % 3) != 0) || ((srcData->size() / 3) > GAME_COLOURS))
error("Specified resource %d is not a palette", resourceId);
_numEntries = srcData->size() / 3;
_palette = Memory::allocate(_numEntries * 4);
convertRgb64Palette(srcData->data(), _numEntries);
break;
default:
error("Invalid palette type specified for palette resource");
}
delete srcData;
}
void Palette::convertRgb64Palette(const byte *srcPalette, uint16 srcNumEntries) {
byte *pDest = _palette->data();
const byte *pSrc = srcPalette;
while (srcNumEntries-- > 0) {
*pDest++ = (pSrc[0] << 2) + (pSrc[0] >> 4);
*pDest++ = (pSrc[1] << 2) + (pSrc[1] >> 4);
*pDest++ = (pSrc[2] << 2) + (pSrc[2] >> 4);
*pDest++ = 0;
pSrc += 3;
}
}
// EGA palette definition copied from DOSBox 0.72
static byte ega_palette[64][3] =
{
{0x00,0x00,0x00}, {0x00,0x00,0x2a}, {0x00,0x2a,0x00}, {0x00,0x2a,0x2a}, {0x2a,0x00,0x00}, {0x2a,0x00,0x2a}, {0x2a,0x15,0x00}, {0x2a,0x2a,0x2a},
{0x00,0x00,0x00}, {0x00,0x00,0x2a}, {0x00,0x2a,0x00}, {0x00,0x2a,0x2a}, {0x2a,0x00,0x00}, {0x2a,0x00,0x2a}, {0x2a,0x15,0x00}, {0x2a,0x2a,0x2a},
{0x15,0x15,0x15}, {0x15,0x15,0x3f}, {0x15,0x3f,0x15}, {0x15,0x3f,0x3f}, {0x3f,0x15,0x15}, {0x3f,0x15,0x3f}, {0x3f,0x3f,0x15}, {0x3f,0x3f,0x3f},
{0x15,0x15,0x15}, {0x15,0x15,0x3f}, {0x15,0x3f,0x15}, {0x15,0x3f,0x3f}, {0x3f,0x15,0x15}, {0x3f,0x15,0x3f}, {0x3f,0x3f,0x15}, {0x3f,0x3f,0x3f},
{0x00,0x00,0x00}, {0x00,0x00,0x2a}, {0x00,0x2a,0x00}, {0x00,0x2a,0x2a}, {0x2a,0x00,0x00}, {0x2a,0x00,0x2a}, {0x2a,0x15,0x00}, {0x2a,0x2a,0x2a},
{0x00,0x00,0x00}, {0x00,0x00,0x2a}, {0x00,0x2a,0x00}, {0x00,0x2a,0x2a}, {0x2a,0x00,0x00}, {0x2a,0x00,0x2a}, {0x2a,0x15,0x00}, {0x2a,0x2a,0x2a},
{0x15,0x15,0x15}, {0x15,0x15,0x3f}, {0x15,0x3f,0x15}, {0x15,0x3f,0x3f}, {0x3f,0x15,0x15}, {0x3f,0x15,0x3f}, {0x3f,0x3f,0x15}, {0x3f,0x3f,0x3f},
{0x15,0x15,0x15}, {0x15,0x15,0x3f}, {0x15,0x3f,0x15}, {0x15,0x3f,0x3f}, {0x3f,0x15,0x15}, {0x3f,0x15,0x3f}, {0x3f,0x3f,0x15}, {0x3f,0x3f,0x3f}
};
void Palette::convertEGAPalette(const byte *srcPalette) {
byte *pDest = _palette->data();
const byte *pSrc = srcPalette;
for (int index = 0; index < 16; ++index, ++pSrc) {
// Handle RGB components of entry
assert(*pSrc < 64);
byte *v = &ega_palette[*pSrc][0];
*pDest++ = *v++ * 4;
*pDest++ = *v++ * 4;
*pDest++ = *v++ * 4;
*pDest++ = 0;
}
}
void Palette::setEntry(uint8 index, uint32 value) {
if (index >= numEntries()) error("Invalid palette index: %d", index);
uint32 *entry = (uint32 *) (data() + index * 4);
*entry = value;
}
uint32 Palette::getEntry(uint8 index) {
if (index >= numEntries()) error("Invalid palette index: %d", index);
uint32 *entry = (uint32 *) (data() + index * 4);
return *entry;
}
void Palette::copyFrom(Palette *src) {
_palette->copyFrom(src->palette());
}
/*--------------------------------------------------------------------------*/
PaletteCollection::PaletteCollection(uint16 resourceId) {
Disk &d = Disk::getReference();
MemoryBlock *resource = d.getEntry(resourceId);
bool isEGA = LureEngine::getReference().isEGA();
uint32 palSize;
uint8 *data = resource->data();
if (isEGA) {
// EGA Palette collection - only has 1 sub-palette
if ((resource->size() != 16) && (resource->size() != 17))
error("Resource #%d is not a valid palette set", resourceId);
_numPalettes = 1;
_palettes = (Palette **) Memory::alloc(1 * sizeof(Palette *));
_palettes[0] = new Palette(16, data, EGA);
} else {
// VGA Palette collection
if (resource->size() % (SUB_PALETTE_SIZE * 3) != 0)
error("Resource #%d is not a valid palette set", resourceId);
palSize = SUB_PALETTE_SIZE * 3;
_numPalettes = resource->size() / palSize;
_palettes = (Palette **) Memory::alloc(_numPalettes * sizeof(Palette *));
for (uint8 paletteCtr = 0; paletteCtr < _numPalettes; ++paletteCtr, data += palSize)
_palettes[paletteCtr] = new Palette(SUB_PALETTE_SIZE, data, RGB64);
}
delete resource;
}
PaletteCollection::~PaletteCollection() {
for (int paletteCtr = 0; paletteCtr < _numPalettes; ++paletteCtr)
delete _palettes[paletteCtr];
free(_palettes);
}
Palette &PaletteCollection::getPalette(uint8 paletteNum) {
if (paletteNum >= _numPalettes)
error("Invalid palette index specified");
return *_palettes[paletteNum];
}
} // end of namespace Lure
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