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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "common/stream.h"
#include "common/textconsole.h"
#include "graphics/pixelformat.h"
#include "graphics/surface.h"
#include "image/neo.h"
namespace Image {
NeoDecoder::NeoDecoder(byte *palette) {
_surface = nullptr;
_paletteDestroy = palette ? false : true;
_palette = palette;
_paletteColorCount = 0;
}
NeoDecoder::~NeoDecoder() {
destroy();
}
void NeoDecoder::destroy() {
if (_surface) {
_surface->free();
delete _surface;
_surface = nullptr;
}
if (_paletteDestroy) {
delete[] _palette;
_palette = nullptr;
}
_paletteColorCount = 0;
}
bool NeoDecoder::loadStream(Common::SeekableReadStream &stream) {
destroy();
if (!_palette) {
int start = stream.pos();
if (stream.readUint16LE() != 0x00)
warning("Header check failed for reading neo image");
if (stream.readUint16LE() != 0x00)
warning("Header check failed for reading neo image");
_palette = new byte[16 * 3];
for (int i = 0; i < 16; ++i) {
byte v1 = stream.readByte();
byte v2 = stream.readByte();
_palette[i * 3 + 0] = floor((v1 & 0x07) * 255.0 / 7.0);
_palette[i * 3 + 1] = floor((v2 & 0x70) * 255.0 / 7.0 / 16.0);
_palette[i * 3 + 2] = floor((v2 & 0x07) * 255.0 / 7.0);
}
stream.seek(start + 128);
}
int width = 320;
int height = 200;
_surface = new Graphics::Surface();
_surface->create(width, height, Graphics::PixelFormat::createFormatCLUT8());
_paletteColorCount = 16;
// 200 rows of image:
for (int y = 0; y < 200; y++) {
// 20 column blocks:
for (int x = 0; x < 20; x++) {
// Fetch the 4 words that make up the
// next 16 pixels across 4 bitplanes:
uint16 uW0 = stream.readUint16BE();
uint16 uW1 = stream.readUint16BE();
uint16 uW2 = stream.readUint16BE();
uint16 uW3 = stream.readUint16BE();
// The first pixel is found in the highest bit:
uint32 uBit = 0x8000;
// 16 pixels to process:
for (int z = 0; z < 16; z++) {
// Work out the colour index:
int idx = 0;
if (uW0 & uBit)
idx += 1;
if (uW1 & uBit)
idx += 2;
if (uW2 & uBit)
idx += 4;
if (uW3 & uBit)
idx += 8;
_surface->setPixel(x * 16 + z, y, idx);
uBit >>= 1;
}
}
}
return true;
}
} // End of namespace Image
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