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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.
*
*/
#include "common/substream.h"
#include "common/debug.h"
#include "common/textconsole.h"
#include "director/director.h"
#include "director/images.h"
namespace Director {
DIBDecoder::DIBDecoder() {
_surface = 0;
_palette = 0;
_paletteColorCount = 0;
_codec = 0;
}
DIBDecoder::~DIBDecoder() {
destroy();
}
void DIBDecoder::destroy() {
_surface = 0;
delete[] _palette;
_palette = 0;
_paletteColorCount = 0;
delete _codec;
_codec = 0;
}
void DIBDecoder::loadPalette(Common::SeekableReadStream &stream) {
uint16 steps = stream.size() / 6;
uint16 index = (steps * 3) - 1;
_paletteColorCount = steps;
_palette = new byte[index + 1];
for (uint8 i = 0; i < steps; i++) {
_palette[index - 2] = stream.readByte();
stream.readByte();
_palette[index - 1] = stream.readByte();
stream.readByte();
_palette[index] = stream.readByte();
stream.readByte();
index -= 3;
}
}
bool DIBDecoder::loadStream(Common::SeekableReadStream &stream) {
uint32 headerSize = stream.readUint32LE();
if (headerSize != 40)
return false;
uint32 width = stream.readUint32LE();
uint32 height = stream.readUint32LE();
stream.readUint16LE(); // planes
uint16 bitsPerPixel = stream.readUint16LE();
uint32 compression = stream.readUint32BE();
/* uint32 imageSize = */ stream.readUint32LE();
/* uint32 pixelsPerMeterX = */ stream.readUint32LE();
/* uint32 pixelsPerMeterY = */ stream.readUint32LE();
_paletteColorCount = stream.readUint32LE();
/* uint32 colorsImportant = */ stream.readUint32LE();
_paletteColorCount = (_paletteColorCount == 0) ? 255: _paletteColorCount;
Common::SeekableSubReadStream subStream(&stream, 40, stream.size());
_codec = Image::createBitmapCodec(compression, width, height, bitsPerPixel);
if (!_codec)
return false;
_surface = _codec->decodeFrame(subStream);
return true;
}
/****************************
* BITD
****************************/
BITDDecoder::BITDDecoder(int w, int h) {
_surface = new Graphics::Surface();
// We make the surface pitch a multiple of 16.
int pitch = w;
if (w % 16)
pitch += 16 - (w % 16);
// HACK: Create a padded surface by adjusting w after create()
_surface->create(pitch, h, Graphics::PixelFormat::createFormatCLUT8());
_surface->w = w;
_palette = new byte[256 * 3];
_palette[0] = _palette[1] = _palette[2] = 0;
_palette[255 * 3 + 0] = _palette[255 * 3 + 1] = _palette[255 * 3 + 2] = 0xff;
_paletteColorCount = 2;
}
BITDDecoder::~BITDDecoder() {
destroy();
}
void BITDDecoder::destroy() {
_surface = 0;
delete[] _palette;
_palette = 0;
_paletteColorCount = 0;
}
void BITDDecoder::loadPalette(Common::SeekableReadStream &stream) {
// no op
}
bool BITDDecoder::loadStream(Common::SeekableReadStream &stream) {
int x = 0, y = 0;
// If the stream has exactly the required number of bits for this image,
// we assume it is uncompressed.
if (stream.size() * 8 == _surface->pitch * _surface->h) {
debugC(3, kDebugImages, "Skipping compression");
for (y = 0; y < _surface->h; y++) {
for (x = 0; x < _surface->pitch; ) {
byte color = stream.readByte();
for (int c = 0; c < 8; c++)
*((byte *)_surface->getBasePtr(x++, y)) = (color & (1 << (7 - c))) ? 0 : 0xff;
}
}
return true;
}
while (y < _surface->h) {
int n = stream.readSByte();
int count;
int b = 0;
int state = 0;
if (stream.eos())
break;
if ((n >= 0) && (n <= 127)) { // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
count = n + 1;
state = 1;
} else if ((n >= -127) && (n <= -1)) { // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
b = stream.readByte();
count = -n + 1;
state = 2;
} else { // Else if n is -128, noop.
count = 0;
}
for (int i = 0; i < count && y < _surface->h; i++) {
byte color = 0;
if (state == 1) {
color = stream.readByte();
} else if (state == 2)
color = b;
for (int c = 0; c < 8; c++) {
*((byte *)_surface->getBasePtr(x, y)) = (color & (1 << (7 - c))) ? 0 : 0xff;
x++;
if (x == _surface->pitch) {
y++;
x = 0;
break;
}
}
}
}
return true;
}
} // End of namespace Director
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