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/* ScummVM - Scumm Interpreter
* Copyright (C) 2005-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#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(uint8 numEntries1, const byte *data1, PaletteSource paletteSource) {
_numEntries = numEntries1;
_palette = Memory::allocate(_numEntries * 4);
if (data1) {
if (paletteSource == RGB64)
convertPalette(data1, _numEntries);
else
_palette->copyFrom(data1, 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) {
Disk &d = Disk::getReference();
MemoryBlock *srcData = d.getEntry(resourceId);
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);
convertPalette(srcData->data(), _numEntries);
delete srcData;
}
void Palette::convertPalette(const byte *palette1, uint16 numEntries1) {
byte *pDest = _palette->data();
const byte *pSrc = palette1;
while (numEntries1-- > 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;
}
}
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);
uint32 palSize;
uint8 *data = resource->data();
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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