mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-16 22:58:09 +00:00
317 lines
6.8 KiB
C++
317 lines
6.8 KiB
C++
/* 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 "graphics/iff.h"
|
|
#include "graphics/surface.h"
|
|
|
|
#include "common/util.h"
|
|
|
|
|
|
namespace Common {
|
|
|
|
// this really belongs to iff_container.cpp, but we don't want
|
|
// to put only this in a source file
|
|
char *ID2string(Common::IFF_ID id) {
|
|
static char str[] = "abcd";
|
|
|
|
str[0] = (char)(id >> 24 & 0xff);
|
|
str[1] = (char)(id >> 16 & 0xff);
|
|
str[2] = (char)(id >> 8 & 0xff);
|
|
str[3] = (char)(id >> 0 & 0xff);
|
|
|
|
return str;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
namespace Graphics {
|
|
|
|
|
|
void fillBMHD(BMHD &bitmapHeader, Common::ReadStream &stream) {
|
|
|
|
bitmapHeader.width = stream.readUint16BE();
|
|
bitmapHeader.height = stream.readUint16BE();
|
|
bitmapHeader.x = stream.readUint16BE();
|
|
bitmapHeader.y = stream.readUint16BE();
|
|
bitmapHeader.depth = stream.readByte();
|
|
bitmapHeader.masking = stream.readByte();
|
|
bitmapHeader.pack = stream.readByte();
|
|
bitmapHeader.flags = stream.readByte();
|
|
bitmapHeader.transparentColor = stream.readUint16BE();
|
|
bitmapHeader.xAspect = stream.readByte();
|
|
bitmapHeader.yAspect = stream.readByte();
|
|
bitmapHeader.pageWidth = stream.readUint16BE();
|
|
bitmapHeader.pageHeight = stream.readUint16BE();
|
|
|
|
}
|
|
|
|
|
|
ILBMDecoder::ILBMDecoder(Common::ReadStream &input, Surface &surface, byte *&colors) : IFFParser(input), _surface(&surface), _colors(&colors) {
|
|
if (_typeId != ID_ILBM)
|
|
error("unsupported IFF subtype '%s'", Common::ID2string(_typeId));
|
|
}
|
|
|
|
void ILBMDecoder::decode() {
|
|
|
|
Common::IFFChunk *chunk;
|
|
while ((chunk = nextChunk()) != 0) {
|
|
switch (chunk->id) {
|
|
case ID_BMHD:
|
|
readBMHD(*chunk);
|
|
break;
|
|
|
|
case ID_CMAP:
|
|
readCMAP(*chunk);
|
|
break;
|
|
|
|
case ID_BODY:
|
|
readBODY(*chunk);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void ILBMDecoder::readBMHD(Common::IFFChunk &chunk) {
|
|
|
|
fillBMHD(_bitmapHeader, chunk);
|
|
|
|
_colorCount = 1 << _bitmapHeader.depth;
|
|
*_colors = (byte*)malloc(sizeof(**_colors) * _colorCount * 3);
|
|
_surface->create(_bitmapHeader.width, _bitmapHeader.height, 1);
|
|
|
|
}
|
|
|
|
void ILBMDecoder::readCMAP(Common::IFFChunk &chunk) {
|
|
if (*_colors == NULL) {
|
|
error("wrong input chunk sequence");
|
|
}
|
|
for (uint32 i = 0; i < _colorCount; i++) {
|
|
(*_colors)[i * 3 + 0] = chunk.readByte();
|
|
(*_colors)[i * 3 + 1] = chunk.readByte();
|
|
(*_colors)[i * 3 + 2] = chunk.readByte();
|
|
}
|
|
}
|
|
|
|
void ILBMDecoder::readBODY(Common::IFFChunk& chunk) {
|
|
|
|
switch (_bitmapHeader.pack) {
|
|
case 0:
|
|
error("unpacked ILBM files are not supported");
|
|
break;
|
|
|
|
case 1: {
|
|
uint32 scanWidth = _bitmapHeader.width >> 3;
|
|
byte *scan = (byte*)malloc(scanWidth);
|
|
byte *out = (byte*)_surface->pixels;
|
|
|
|
PackBitsReadStream stream(chunk);
|
|
|
|
for (uint32 i = 0; i < _bitmapHeader.height; i++) {
|
|
|
|
for (uint32 j = 0; j < _bitmapHeader.depth; j++) {
|
|
stream.read(scan, scanWidth);
|
|
fillPlane(out, scan, scanWidth, j);
|
|
}
|
|
|
|
out += _bitmapHeader.width;
|
|
}
|
|
free(scan);
|
|
break;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
void ILBMDecoder::fillPlane(byte *out, byte* buf, uint32 width, uint32 plane) {
|
|
|
|
byte src, idx, set;
|
|
byte mask = 1 << plane;
|
|
|
|
for (uint32 j = 0; j < _bitmapHeader.width; j++) {
|
|
src = buf[j >> 3];
|
|
idx = 7 - (j & 7);
|
|
set = src & (1 << idx);
|
|
|
|
if (set)
|
|
out[j] |= mask;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
PBMDecoder::PBMDecoder(Common::ReadStream &input, Surface &surface, byte *&colors) : IFFParser(input), _surface(&surface), _colors(&colors) {
|
|
if (_typeId != ID_PBM)
|
|
error("unsupported IFF subtype '%s'", Common::ID2string(_typeId));
|
|
}
|
|
|
|
void PBMDecoder::decode() {
|
|
|
|
Common::IFFChunk *chunk;
|
|
while ((chunk = nextChunk()) != 0) {
|
|
switch (chunk->id) {
|
|
case ID_BMHD:
|
|
readBMHD(*chunk);
|
|
break;
|
|
|
|
case ID_CMAP:
|
|
readCMAP(*chunk);
|
|
break;
|
|
|
|
case ID_BODY:
|
|
readBODY(*chunk);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void PBMDecoder::readBMHD(Common::IFFChunk &chunk) {
|
|
|
|
fillBMHD(_bitmapHeader, chunk);
|
|
|
|
_colorCount = 1 << _bitmapHeader.depth;
|
|
*_colors = (byte*)malloc(sizeof(**_colors) * _colorCount * 3);
|
|
_surface->create(_bitmapHeader.width, _bitmapHeader.height, 1);
|
|
|
|
}
|
|
|
|
void PBMDecoder::readCMAP(Common::IFFChunk &chunk) {
|
|
if (*_colors == NULL) {
|
|
error("wrong input chunk sequence");
|
|
}
|
|
for (uint32 i = 0; i < _colorCount; i++) {
|
|
(*_colors)[i * 3 + 0] = chunk.readByte();
|
|
(*_colors)[i * 3 + 1] = chunk.readByte();
|
|
(*_colors)[i * 3 + 2] = chunk.readByte();
|
|
}
|
|
}
|
|
|
|
void PBMDecoder::readBODY(Common::IFFChunk& chunk) {
|
|
|
|
uint si = 0;
|
|
|
|
switch (_bitmapHeader.pack) {
|
|
case 0:
|
|
while (!chunk.eos()) {
|
|
((byte*)_surface->pixels)[si++] = chunk.readByte();
|
|
}
|
|
break;
|
|
|
|
case 1: {
|
|
PackBitsReadStream stream(chunk);
|
|
stream.read((byte*)_surface->pixels, _surface->w * _surface->h);
|
|
break;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PackBitsReadStream::PackBitsReadStream(Common::ReadStream &input) : _input(&input), _wStoragePos(_storage), _rStoragePos(_storage) {
|
|
}
|
|
|
|
PackBitsReadStream::~PackBitsReadStream() {
|
|
}
|
|
|
|
bool PackBitsReadStream::eos() const {
|
|
return _input->eos() & (_rStoragePos == _wStoragePos);
|
|
}
|
|
|
|
uint32 PackBitsReadStream::read(void *dataPtr, uint32 dataSize) {
|
|
_out = (byte*)dataPtr;
|
|
_outEnd = _out + dataSize;
|
|
|
|
feed();
|
|
unpack();
|
|
return _fed + _unpacked;
|
|
}
|
|
|
|
void PackBitsReadStream::store(byte b) {
|
|
if (_out < _outEnd) {
|
|
*_out++ = b;
|
|
_unpacked++;
|
|
_wStoragePos = _storage;
|
|
} else {
|
|
assert(_wStoragePos < _storage + 257);
|
|
*_wStoragePos++ = b;
|
|
}
|
|
|
|
_rStoragePos = _storage;
|
|
}
|
|
|
|
void PackBitsReadStream::feed() {
|
|
_fed = 0;
|
|
|
|
int len = MIN(_wStoragePos - _rStoragePos, _outEnd - _out);
|
|
if (len == 0) return;
|
|
|
|
for (int i = 0; i < len; i++)
|
|
*_out++ = *_rStoragePos++;
|
|
|
|
_fed = len;
|
|
}
|
|
|
|
void PackBitsReadStream::unpack() {
|
|
byte byteRun;
|
|
byte idx;
|
|
|
|
uint32 i, j;
|
|
_unpacked = 0;
|
|
|
|
while (_out < _outEnd && !_input->eos()) {
|
|
byteRun = _input->readByte();
|
|
if (byteRun <= 127) {
|
|
i = byteRun + 1;
|
|
for (j = 0; j < i; j++) {
|
|
idx = _input->readByte();
|
|
store(idx);
|
|
}
|
|
} else if (byteRun != 128) {
|
|
i = (256 - byteRun) + 1;
|
|
idx = _input->readByte();
|
|
for (j = 0; j < i; j++) {
|
|
store(idx);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void decodePBM(Common::ReadStream &input, Surface &surface, byte *&colors) {
|
|
PBMDecoder decoder(input, surface, colors);
|
|
decoder.decode();
|
|
}
|
|
|
|
}
|