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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/scummsys.h"
#include "common/file.h"
#include "common/system.h"
#include "common/stream.h"
#include "engines/util.h"
#include "graphics/decoders/tga.h"
#include "zvision/render_manager.h"
#include "zvision/lzss_read_stream.h"
namespace ZVision {
RenderManager::RenderManager(OSystem *system, const int width, const int height)
: _system(system),
_width(width),
_height(height),
_currentBackground(0),
_needsScreenUpdate(false),
_renderTable(width, height) {
}
RenderManager::~RenderManager() {
if (_currentBackground != 0) {
delete _currentBackground;
}
}
void RenderManager::renderSubRectToScreen(uint16 *buffer, uint32 imageWidth, uint32 imageHeight, uint32 horizontalPitch, uint32 destinationX, uint32 destinationY, Common::Rect subRectangle, bool autoCenter) {
// Panoramas are transposed
// The actual data is transposed in mutateImage
if (_renderTable.getRenderState() == RenderTable::PANORAMA || _renderTable.getRenderState() == RenderTable::TILT) {
uint32 temp = imageHeight;
imageHeight = imageWidth;
imageWidth = temp;
}
// If subRect is empty, use the entire image
if (subRectangle.isEmpty())
subRectangle = Common::Rect(imageWidth, imageHeight);
// Clip to image bounds
subRectangle.clip(imageWidth, imageHeight);
// Clip destRect to screen bounds
Common::Rect destRect(destinationX, destinationY, destinationX + subRectangle.width(), destinationY + subRectangle.height());
destRect.clip(_width, _height);
// Clip subRect to screen bounds
subRectangle.translate(destRect.left - destinationX, destRect.top - destinationY);
subRectangle.setWidth(destRect.width());
subRectangle.setHeight(destRect.height());
// Check for validity
if (!subRectangle.isValidRect() || subRectangle.isEmpty() || !destRect.isValidRect() || destRect.isEmpty())
return;
// Center the image on the screen if asked
if (autoCenter) {
destRect.moveTo((_width - subRectangle.width()) / 2, (_height - subRectangle.height()) / 2);
}
if (_renderTable.getRenderState() == RenderTable::FLAT) {
_system->copyRectToScreen(buffer + subRectangle.top * horizontalPitch + subRectangle.left, horizontalPitch, destRect.left, destRect.top, destRect.width(), destRect.height());
} else {
uint16 *destBuffer = new uint16[destRect.width() * destRect.height()];
_renderTable.mutateImage((uint16 *)buffer, destBuffer, imageWidth, imageHeight, subRectangle, destRect);
_system->copyRectToScreen(destBuffer, subRectangle.width() * sizeof(uint16), destRect.left, destRect.top, destRect.width(), destRect.height());
delete[] destBuffer;
}
}
void RenderManager::renderImageToScreen(const Common::String &fileName, uint32 destinationX, uint32 destinationY, Common::Rect subRectangle, bool autoCenter) {
Common::File file;
if (!file.open(fileName)) {
warning("Could not open file %s", fileName.c_str());
return;
}
renderImageToScreen(file, destinationX, destinationY, subRectangle, autoCenter);
}
void RenderManager::renderImageToScreen(Common::SeekableReadStream &stream, uint32 destinationX, uint32 destinationY, Common::Rect subRectangle, bool autoCenter) {
// Read the magic number
// Some files are true TGA, while others are TGZ
uint32 fileType;
fileType = stream.readUint32BE();
// Check for TGZ files
if (fileType == MKTAG('T', 'G', 'Z', '\0')) {
// TGZ files have a header and then Bitmap data that is compressed with LZSS
uint32 decompressedSize = stream.readSint32LE();
uint32 imageWidth = stream.readSint32LE();
uint32 imageHeight = stream.readSint32LE();
LzssReadStream lzssStream(&stream);
byte *buffer = new byte[decompressedSize];
lzssStream.read(buffer, decompressedSize);
uint32 horizontalPitch = imageWidth * sizeof(uint16);
renderSubRectToScreen((uint16 *)buffer, imageWidth, imageHeight, horizontalPitch, destinationX, destinationY, subRectangle, autoCenter);
delete[] buffer;
} else {
// Reset the cursor
stream.seek(0);
// Decode
Graphics::TGADecoder tga;
if (!tga.loadStream(stream)) {
warning("Error while reading TGA image");
return;
}
const Graphics::Surface *tgaSurface = tga.getSurface();
renderSubRectToScreen((uint16 *)tgaSurface->pixels, tgaSurface->w, tgaSurface->h, tgaSurface->pitch, destinationX, destinationY, subRectangle, autoCenter);
tga.destroy();
}
_needsScreenUpdate = true;
}
RenderTable *RenderManager::getRenderTable() {
return &_renderTable;
}
void RenderManager::setBackgroundImage(const Common::String &fileName) {
Common::File *file = new Common::File;
if (!file->open(fileName)) {
warning("Could not open file %s", fileName.c_str());
return;
}
_currentBackground = file;
renderImageToScreen(*_currentBackground, 0, 0, Common::Rect(), true);
}
} // End of namespace ZVision
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