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engines/supernova/graphics.cpp
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290
engines/supernova/graphics.cpp
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "common/algorithm.h"
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#include "common/file.h"
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#include "common/stream.h"
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#include "common/system.h"
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#include "common/config-manager.h"
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#include "common/memstream.h"
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#include "graphics/paletteman.h"
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#include "graphics/surface.h"
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#include "supernova/graphics.h"
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#include "supernova/msn_def.h"
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#include "supernova/screen.h"
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#include "supernova/supernova.h"
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namespace Supernova {
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MSNImage::MSNImage(SupernovaEngine *vm)
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: _palette(0), _vm(vm) {
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_encodedImage = nullptr;
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_filenumber = -1;
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_pitch = 0;
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_numSections = 0;
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_numClickFields = 0;
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for (int i = 0; i < kMaxSections; ++i) {
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_section[i].x1 = 0;
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_section[i].x2 = 0;
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_section[i].y1 = 0;
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_section[i].y2 = 0;
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_section[i].next = 0;
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_section[i].addressLow = 0xFFFF;
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_section[i].addressHigh = 0xFF;
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}
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for (int i = 0; i < kMaxClickFields; ++i) {
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_clickField[i].x1 = 0;
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_clickField[i].x2 = 0;
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_clickField[i].y1 = 0;
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_clickField[i].y2 = 0;
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_clickField[i].next = 0;
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}
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}
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MSNImage::~MSNImage() {
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destroy();
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}
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bool MSNImage::init(int filenumber) {
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Common::File file;
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_filenumber = filenumber;
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if (_vm->_MSPart == 1) {
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if (!file.open(Common::Path(Common::String::format("msn_data.%03d", filenumber)))) {
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warning("Image data file msn_data.%03d could not be read!", filenumber);
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return false;
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}
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loadStream(file);
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}
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else if (_vm->_MSPart == 2) {
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if (!loadFromEngineDataFile()) {
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if (!file.open(Common::Path(Common::String::format("ms2_data.%03d", filenumber)))) {
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warning("Image data file ms2_data.%03d could not be read!", filenumber);
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return false;
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}
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loadStream(file);
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}
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}
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return true;
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}
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bool MSNImage::loadPbmFromEngineDataFile() {
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Common::String name;
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if (_vm->_MSPart == 2) {
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if (_filenumber == 38)
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name = "IMG3";
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else
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return false;
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} else if (_vm->_MSPart == 1) {
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if (_filenumber == 1)
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name = "IMG1";
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else if (_filenumber == 2)
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name = "IMG2";
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else
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return false;
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} else
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return false;
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Common::SeekableReadStream *stream = _vm->getBlockFromDatFile(name);
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if (stream == nullptr)
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return false;
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stream->read(_encodedImage, stream->size());
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return true;
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}
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bool MSNImage::loadFromEngineDataFile() {
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Common::String name;
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if (_vm->_MSPart == 1) {
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return false;
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} else if (_vm->_MSPart == 2) {
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if (_filenumber == 15)
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name = "M015";
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else if (_filenumber == 27)
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name = "M027";
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else if (_filenumber == 28)
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name = "M028";
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else
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return false;
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}
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Common::SeekableReadStream *stream = _vm->getBlockFromDatFile(name);
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if (stream == nullptr)
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return false;
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return loadStream(*stream);
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}
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bool MSNImage::loadStream(Common::SeekableReadStream &stream) {
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destroy();
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uint size = 0;
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size = (stream.readUint16LE() + 0xF) >> 4;
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size |= (stream.readUint16LE() & 0xF) << 12;
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size += 0x70; // zus_paragraph
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size *= 16; // a paragraph is 16 bytes
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_encodedImage = new byte[size];
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byte palette[717];
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g_system->getPaletteManager()->grabPalette(palette, 16, 239);
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_palette.resize(239, false);
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_palette.set(palette, 0, 239);
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byte pal_diff;
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byte flag = stream.readByte();
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if (flag == 0) {
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pal_diff = 0;
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_palette.set(47, 0xE0, 0xE0, 0xE0);
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} else {
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pal_diff = 1;
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for (int i = flag; i != 0; --i) {
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byte r = stream.readByte() << 2;
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byte g = stream.readByte() << 2;
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byte b = stream.readByte() << 2;
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_palette.set(239 - i, r, g, b);
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}
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}
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_numSections = stream.readByte();
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for (int i = 0; i < kMaxSections; ++i) {
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_section[i].addressHigh = 0xff;
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_section[i].addressLow = 0xffff;
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_section[i].x2 = 0;
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_section[i].next = 0;
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}
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for (int i = 0; i < _numSections; ++i) {
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_section[i].x1 = stream.readUint16LE();
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_section[i].x2 = stream.readUint16LE();
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_section[i].y1 = stream.readByte();
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_section[i].y2 = stream.readByte();
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_section[i].next = stream.readByte();
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_section[i].addressLow = stream.readUint16LE();
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_section[i].addressHigh = stream.readByte();
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}
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_numClickFields = stream.readByte();
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for (int i = 0; i < _numClickFields; ++i) {
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_clickField[i].x1 = stream.readUint16LE();
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_clickField[i].x2 = stream.readUint16LE();
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_clickField[i].y1 = stream.readByte();
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_clickField[i].y2 = stream.readByte();
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_clickField[i].next = stream.readByte();
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}
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for (int i = _numClickFields; i < kMaxClickFields; ++i) {
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_clickField[i].x1 = 0;
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_clickField[i].x2 = 0;
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_clickField[i].y1 = 0;
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_clickField[i].y2 = 0;
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_clickField[i].next = 0;
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}
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// Newspaper images may be in the engine data file. So first try to read
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// it from there.
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if (!loadPbmFromEngineDataFile()) {
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// Load the image from the stream
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byte zwCodes[256] = {0};
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byte numRepeat = stream.readByte();
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byte numZw = stream.readByte();
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stream.read(zwCodes, numZw);
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numZw += numRepeat;
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byte input = 0;
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uint i = 0;
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while (stream.read(&input, 1)) {
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if (input < numRepeat) {
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++input;
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byte value = stream.readByte();
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for (--value; input > 0; --input) {
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_encodedImage[i++] = value;
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}
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} else if (input < numZw) {
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input = zwCodes[input - numRepeat];
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--input;
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_encodedImage[i++] = input;
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_encodedImage[i++] = input;
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} else {
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input -= pal_diff;
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_encodedImage[i++] = input;
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}
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}
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}
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loadSections();
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return true;
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}
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bool MSNImage::loadSections() {
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bool isNewspaper = (_vm->_MSPart == 1 && (_filenumber == 1 || _filenumber == 2)) ||
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(_vm->_MSPart == 2 && _filenumber == 38);
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int imageWidth = isNewspaper ? 640 : 320;
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int imageHeight = isNewspaper ? 480 : 200;
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_pitch = imageWidth;
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for (int section = 0; section < _numSections; ++section) {
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Graphics::Surface *surface = new Graphics::Surface;
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_sectionSurfaces.push_back(surface);
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if (isNewspaper) {
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Color color1 = isNewspaper ? kColorWhite63 : kColorWhite44;
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surface->create(imageWidth, imageHeight, g_system->getScreenFormat());
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byte *surfacePixels = static_cast<byte *>(surface->getPixels());
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for (int i = 0; i < imageWidth * imageHeight / 8; ++i) {
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*surfacePixels++ = (_encodedImage[i] & 0x80) ? color1 : kColorBlack;
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*surfacePixels++ = (_encodedImage[i] & 0x40) ? color1 : kColorBlack;
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*surfacePixels++ = (_encodedImage[i] & 0x20) ? color1 : kColorBlack;
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*surfacePixels++ = (_encodedImage[i] & 0x10) ? color1 : kColorBlack;
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*surfacePixels++ = (_encodedImage[i] & 0x08) ? color1 : kColorBlack;
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*surfacePixels++ = (_encodedImage[i] & 0x04) ? color1 : kColorBlack;
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*surfacePixels++ = (_encodedImage[i] & 0x02) ? color1 : kColorBlack;
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*surfacePixels++ = (_encodedImage[i] & 0x01) ? color1 : kColorBlack;
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}
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} else {
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uint32 offset = (_section[section].addressHigh << 16) + _section[section].addressLow;
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if (offset == kInvalidAddress || _section[section].x2 == 0) {
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return false;
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}
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int width = _section[section].x2 - _section[section].x1 + 1;
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int height = _section[section].y2 - _section[section].y1 + 1;
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surface->create(width, height, g_system->getScreenFormat());
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byte *surfacePixels = static_cast<byte *>(surface->getPixels());
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Common::copy(_encodedImage + offset, _encodedImage + offset + width * height, surfacePixels);
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}
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}
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return true;
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}
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void MSNImage::destroy() {
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_palette.clear();
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if (_encodedImage) {
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delete[] _encodedImage;
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_encodedImage = nullptr;
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}
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for (Common::Array<Graphics::Surface *>::iterator it = _sectionSurfaces.begin();
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it != _sectionSurfaces.end(); ++it) {
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(*it)->free();
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}
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}
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}
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