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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 "cine/cine.h"
#include "cine/various.h"
#include "graphics/pixelformat.h"
namespace Cine {
Common::Array<PalEntry> palArray;
static byte paletteBuffer1[16];
static byte paletteBuffer2[16];
void loadPal(const char *fileName) {
char buffer[20];
removeExtention(buffer, fileName);
strcat(buffer, ".PAL");
palArray.clear();
Common::File palFileHandle;
if (!palFileHandle.open(buffer))
error("loadPal(): Cannot open file %s", fileName);
uint16 palEntriesCount = palFileHandle.readUint16LE();
palFileHandle.readUint16LE(); // entry size
palArray.resize(palEntriesCount);
for (uint i = 0; i < palArray.size(); ++i) {
palFileHandle.read(palArray[i].name, 10);
palFileHandle.read(palArray[i].pal1, 16);
palFileHandle.read(palArray[i].pal2, 16);
}
palFileHandle.close();
}
int16 findPaletteFromName(const char *fileName) {
char buffer[10];
uint16 position = 0;
uint16 i;
strcpy(buffer, fileName);
while (position < strlen(fileName)) {
if (buffer[position] > 'a' && buffer[position] < 'z') {
buffer[position] += 'A' - 'a';
}
position++;
}
for (i = 0; i < palArray.size(); i++) {
if (!strcmp(buffer, palArray[i].name)) {
return i;
}
}
return -1;
}
void loadRelatedPalette(const char *fileName) {
char localName[16];
byte i;
int16 paletteIndex;
removeExtention(localName, fileName);
paletteIndex = findPaletteFromName(localName);
if (paletteIndex == -1) {
for (i = 0; i < 16; i++) { // generate default palette
paletteBuffer1[i] = paletteBuffer2[i] = (i << 4) + i;
}
} else {
assert(paletteIndex < (int32)palArray.size());
memcpy(paletteBuffer1, palArray[paletteIndex].pal1, 16);
memcpy(paletteBuffer2, palArray[paletteIndex].pal2, 16);
}
}
void palRotate(uint16 *pal, byte a, byte b, byte c) {
assert(pal);
if (c == 1) {
uint16 currentColor = pal[b];
for (int i = b; i > a; i--) {
pal[i] = pal[i - 1];
}
pal[a] = currentColor;
}
}
void palRotate(byte *pal, byte a, byte b, byte c) {
assert(pal);
if (c == 1) {
byte currentR = pal[3 * b + 0];
byte currentG = pal[3 * b + 1];
byte currentB = pal[3 * b + 2];
for (int i = b; i > a; i--) {
pal[3 * i + 0] = pal[3 * (i - 1) + 0];
pal[3 * i + 1] = pal[3 * (i - 1) + 1];
pal[3 * i + 2] = pal[3 * (i - 1) + 2];
}
pal[3 * a + 0] = currentR;
pal[3 * a + 1] = currentG;
pal[3 * a + 2] = currentB;
}
}
uint16 transformColor(uint16 baseColor, int r, int g, int b) {
int8 oriR = CLIP( (baseColor & 0x007) + b, 0, 7);
int8 oriG = CLIP(((baseColor & 0x070) >> 4) + g, 0, 7);
int8 oriB = CLIP(((baseColor & 0x700) >> 8) + r, 0, 7);
return oriR | (oriG << 4) | (oriB << 8);
}
void transformPaletteRange(uint16 *dstPal, uint16 *srcPal, int startColor, int stopColor, int r, int g, int b) {
assert(srcPal && dstPal);
for (int i = startColor; i <= stopColor; i++)
dstPal[i] = transformColor(srcPal[i], r, g, b);
}
void transformPaletteRange(byte *dstPal, byte *srcPal, int startColor, int stopColor, int r, int g, int b) {
assert(srcPal && dstPal);
for (int i = startColor; i <= stopColor; i++) {
dstPal[3 * i + 0] = CLIP(srcPal[3 * i + 0] + r * 36, 0, 252);
dstPal[3 * i + 1] = CLIP(srcPal[3 * i + 1] + g * 36, 0, 252);
dstPal[3 * i + 2] = CLIP(srcPal[3 * i + 2] + b * 36, 0, 252);
}
}
// a.k.a. palRotate
Palette &Palette::rotateRight(byte firstIndex, byte lastIndex) {
const Color lastColor = _colors[lastIndex];
for (int i = lastIndex; i > firstIndex; i--)
_colors[i] = _colors[i - 1];
_colors[firstIndex] = lastColor;
return *this;
}
uint Palette::colorCount() const {
return _colors.size();
}
// a.k.a. transformPaletteRange
Palette &Palette::saturatedAddColor(byte firstIndex, byte lastIndex, signed r, signed g, signed b) {
assert(firstIndex < colorCount() && lastIndex < colorCount());
for (uint i = firstIndex; i <= lastIndex; i++)
saturatedAddColor(i, r, g, b);
return *this;
}
// a.k.a. transformColor
// Parameter color components (i.e. r, g and b) are in range [-7, 7]
// e.g. r = 7 sets the resulting color's red component to maximum
// e.g. r = -7 sets the resulting color's red component to minimum (i.e. zero)
void Palette::saturatedAddColor(byte index, signed r, signed g, signed b) {
_colors[index].r = CLIP<int>(_colors[index].r + r, 0, _rMax);
_colors[index].g = CLIP<int>(_colors[index].g + g, 0, _gMax);
_colors[index].b = CLIP<int>(_colors[index].b + b, 0, _bMax);
}
Palette &Palette::loadCineLowPal(const byte *colors, const uint numColors) {
static const Graphics::PixelFormat format = {2, 5, 5, 5, 8, 8, 4, 0, 0};
return load(colors, format, numColors);
}
Palette &Palette::loadCineHighPal(const byte *colors, const uint numColors) {
static const Graphics::PixelFormat format = {3, 0, 0, 0, 8, 0, 8, 16, 0};
return load(colors, format, numColors);
}
Palette &Palette::load(const byte *colors, const Graphics::PixelFormat format, const uint numColors) {
assert(format.aLoss == 8); // No alpha
assert(format.rShift % 8 == ((format.rShift + (8 - format.rLoss - 1)) % 8)); // R must be inside one byte
assert(format.gShift % 8 == ((format.gShift + (8 - format.gLoss - 1)) % 8)); // G must be inside one byte
assert(format.bShift % 8 == ((format.bShift + (8 - format.bLoss - 1)) % 8)); // B must be inside one byte
_rBits = (8 - format.rLoss);
_gBits = (8 - format.gLoss);
_bBits = (8 - format.bLoss);
_rMax = (1 << _rBits) - 1;
_gMax = (1 << _gBits) - 1;
_bMax = (1 << _bBits) - 1;
_colors.clear();
_colors.resize(numColors);
for (uint i = 0; i < numColors; i++) {
// _rMax, _gMax, _bMax are also used as masks here
_colors[i].r = (colors[i * format.bytesPerPixel + (format.rShift / 8)] >> (format.rShift % 8)) & _rMax;
_colors[i].g = (colors[i * format.bytesPerPixel + (format.gShift / 8)] >> (format.gShift % 8)) & _gMax;
_colors[i].b = (colors[i * format.bytesPerPixel + (format.bShift / 8)] >> (format.bShift % 8)) & _bMax;
}
return *this;
}
} // End of namespace Cine
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