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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/debug.h"
#include "graphics/pixelformat.h"
#include "graphics/transparent_surface.h"
#include "sludge/allfiles.h"
#include "sludge/fileset.h"
#include "sludge/graphics.h"
#include "sludge/moreio.h"
#include "sludge/newfatal.h"
#include "sludge/sludge.h"
#include "sludge/sprites.h"
#include "sludge/zbuffer.h"
namespace Sludge {
void GraphicsManager::killZBuffer() {
if (_zBuffer->sprites) {
for (int i = 0; i < _zBuffer->numPanels; ++i) {
_zBuffer->sprites[i].free();
}
delete []_zBuffer->sprites;
_zBuffer->sprites = nullptr;
}
_zBuffer->numPanels = 0;
_zBuffer->originalNum = -1;
}
void GraphicsManager::sortZPal(int *oldpal, int *newpal, int size) {
int i, tmp;
for (i = 0; i < size; i++) {
newpal[i] = i;
}
if (size < 2)
return;
for (i = 1; i < size; i++) {
if (oldpal[newpal[i]] < oldpal[newpal[i - 1]]) {
tmp = newpal[i];
newpal[i] = newpal[i - 1];
newpal[i - 1] = tmp;
i = 0;
}
}
}
bool GraphicsManager::setZBuffer(int num) {
// if the backdrop has not been set yet
// set zbuffer later
if (!_backdropSurface.getPixels()) {
_zBuffer->originalNum = num;
return true;
}
debug (kSludgeDebugGraphics, "Setting zBuffer");
uint32 stillToGo = 0;
int yPalette[16], sorted[16];
killZBuffer();
setResourceForFatal(num);
_zBuffer->originalNum = num;
if (!g_sludge->_resMan->openFileFromNum(num))
return false;
Common::ReadStream *readStream = g_sludge->_resMan->getData();
if (readStream->readByte() != 'S')
return fatal("Not a Z-buffer file");
if (readStream->readByte() != 'z')
return fatal("Not a Z-buffer file");
if (readStream->readByte() != 'b')
return fatal("Not a Z-buffer file");
uint width, height;
switch (readStream->readByte()) {
case 0:
width = 640;
height = 480;
break;
case 1:
width = readStream->readUint16BE();
height = readStream->readUint16BE();
break;
default:
return fatal("Extended Z-buffer format not supported in this version of the SLUDGE engine");
}
if (width != _sceneWidth || height != _sceneHeight) {
Common::String tmp = Common::String::format("Z-w: %d Z-h:%d w: %d, h:%d", width, height, _sceneWidth, _sceneHeight);
return fatal("Z-buffer width and height don't match scene width and height", tmp);
}
_zBuffer->numPanels = readStream->readByte();
debugC(2, kSludgeDebugZBuffer, "Loading zBuffer : %i panels", _zBuffer->numPanels);
for (int y = 0; y < _zBuffer->numPanels; y++) {
yPalette[y] = readStream->readUint16BE();
}
sortZPal(yPalette, sorted, _zBuffer->numPanels);
for (int y = 0; y < _zBuffer->numPanels; y++) {
_zBuffer->panel[y] = yPalette[sorted[y]];
debugC(2, kSludgeDebugZBuffer, "Y-value : %i", _zBuffer->panel[y]);
}
int picWidth = _sceneWidth;
int picHeight = _sceneHeight;
_zBuffer->sprites = nullptr;
_zBuffer->sprites = new Graphics::Surface[_zBuffer->numPanels];
for (int i = 0; i < _zBuffer->numPanels; ++i) {
_zBuffer->sprites[i].create(picWidth, picHeight, *g_sludge->getScreenPixelFormat());
}
for (uint y = 0; y < _sceneHeight; y++) {
for (uint x = 0; x < _sceneWidth; x++) {
int n = 0;
if (stillToGo == 0) {
n = readStream->readByte();
stillToGo = n >> 4;
if (stillToGo == 15)
stillToGo = readStream->readUint16BE() + 16l;
else
stillToGo++;
n &= 15;
}
for (int i = 0; i < _zBuffer->numPanels; ++i) {
byte *target = (byte *)_zBuffer->sprites[i].getBasePtr(x, y);
if (n && (sorted[i] == n || i == 0)) {
byte *source = (byte *)_backdropSurface.getBasePtr(x, y);
target[0] = source[0];
target[1] = source[1];
target[2] = source[2];
target[3] = source[3];
} else {
target[0] = 0;
target[1] = 0;
target[2] = 0;
target[3] = 0;
}
}
stillToGo--;
}
}
g_sludge->_resMan->finishAccess();
setResourceForFatal(-1);
return true;
}
void GraphicsManager::drawZBuffer(int x, int y, bool upsidedown) {
if (!_zBuffer->numPanels || !_zBuffer->sprites)
return;
g_sludge->_gfxMan->resetSpriteLayers(_zBuffer, x, y, upsidedown);
}
void GraphicsManager::saveZBuffer(Common::WriteStream *stream) {
if (_zBuffer->numPanels > 0) {
stream->writeByte(1);
stream->writeUint16BE(_zBuffer->originalNum);
} else {
stream->writeByte(0);
}
}
bool GraphicsManager::loadZBuffer(Common::SeekableReadStream *stream) {
if (stream->readByte()) {
if (!setZBuffer(stream->readUint16BE()))
return false;
}
return true;
}
} // End of namespace Sludge
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