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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.
*
* Additional copyright for this file:
* Copyright (C) 1995-1997 Presto Studios, Inc.
*
* 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/events.h"
#include "common/file.h"
#include "common/textconsole.h"
#include "engines/util.h"
#include "pegasus/elements.h"
#include "pegasus/graphics.h"
namespace Pegasus {
GraphicsManager::GraphicsManager(PegasusEngine *vm) : _vm(vm) {
initGraphics(640, 480, true, NULL);
if (_vm->_system->getScreenFormat().bytesPerPixel == 1)
error("No true color mode available");
_backLayer = kMinAvailableOrder;
_frontLayer = kMaxAvailableOrder;
_firstDisplayElement = _lastDisplayElement = 0;
_workArea.create(640, 480, _vm->_system->getScreenFormat());
_modifiedScreen = false;
}
GraphicsManager::~GraphicsManager() {
_workArea.free();
}
void GraphicsManager::invalRect(const Common::Rect &rect) {
// We're using a simpler algorithm for dirty rect handling than the original
// The original was way too overcomplicated for what we need here now.
if (_dirtyRect.width() == 0 || _dirtyRect.height() == 0) {
// We have no dirty rect, so this is now our dirty rect
_dirtyRect = rect;
} else {
// Expand our dirty rect to include rect
_dirtyRect.extend(rect);
}
// Sanity check: clip our rect to the screen
_dirtyRect.right = MIN<int>(640, _dirtyRect.right);
_dirtyRect.bottom = MIN<int>(480, _dirtyRect.bottom);
}
void GraphicsManager::addDisplayElement(DisplayElement *newElement) {
newElement->_elementOrder = CLIP<int>(newElement->_elementOrder, kMinAvailableOrder, kMaxAvailableOrder);
if (_firstDisplayElement) {
DisplayElement *runner = _firstDisplayElement;
DisplayElement *lastRunner = 0;
// Search for first element whose display order is greater than
// the new element's and add the new element just before it.
while (runner) {
if (newElement->_elementOrder < runner->_elementOrder) {
if (lastRunner) {
lastRunner->_nextElement = newElement;
newElement->_nextElement = runner;
} else {
newElement->_nextElement = _firstDisplayElement;
_firstDisplayElement = newElement;
}
break;
}
lastRunner = runner;
runner = runner->_nextElement;
}
// If got here and runner == NULL, we ran through the whole list without
// inserting, so add at the end.
if (!runner) {
_lastDisplayElement->_nextElement = newElement;
_lastDisplayElement = newElement;
}
} else {
_firstDisplayElement = newElement;
_lastDisplayElement = newElement;
}
newElement->_elementIsDisplaying = true;
}
void GraphicsManager::removeDisplayElement(DisplayElement *oldElement) {
if (!_firstDisplayElement)
return;
if (oldElement == _firstDisplayElement) {
if (oldElement == _lastDisplayElement) {
_firstDisplayElement = 0;
_lastDisplayElement = 0;
} else {
_firstDisplayElement = oldElement->_nextElement;
}
invalRect(oldElement->_bounds);
} else {
// Scan list for element.
// If we get here, we know that the list has at least one item, and it
// is not the first item, so we can skip it.
DisplayElement *runner = _firstDisplayElement->_nextElement;
DisplayElement *lastRunner = _firstDisplayElement;
while (runner) {
if (runner == oldElement) {
lastRunner->_nextElement = runner->_nextElement;
if (oldElement == _lastDisplayElement)
_lastDisplayElement = lastRunner;
invalRect(oldElement->_bounds);
break;
}
lastRunner = runner;
runner = runner->_nextElement;
}
}
oldElement->_nextElement = 0;
oldElement->_elementIsDisplaying = false;
}
void GraphicsManager::updateDisplay() {
bool screenDirty = false;
if (!_dirtyRect.isEmpty()) {
for (DisplayElement *runner = _firstDisplayElement; runner != 0; runner = runner->_nextElement) {
Common::Rect bounds;
runner->getBounds(bounds);
// TODO: Better logic; it does a bit more work than it probably needs to
// but it should work fine for now.
if (bounds.intersects(_dirtyRect) && runner->validToDraw(_backLayer, _frontLayer)) {
runner->draw(bounds);
screenDirty = true;
}
}
// Copy only the dirty rect to the screen
if (screenDirty)
g_system->copyRectToScreen((byte *)_workArea.getBasePtr(_dirtyRect.left, _dirtyRect.top), _workArea.pitch, _dirtyRect.left, _dirtyRect.top, _dirtyRect.width(), _dirtyRect.height());
// Clear the dirty rect
_dirtyRect = Common::Rect();
}
if (screenDirty || _modifiedScreen)
g_system->updateScreen();
_modifiedScreen = false;
}
void GraphicsManager::clearScreen() {
Graphics::Surface *screen = g_system->lockScreen();
screen->fillRect(Common::Rect(0, 0, 640, 480), g_system->getScreenFormat().RGBToColor(0, 0, 0));
g_system->unlockScreen();
_modifiedScreen = true;
}
DisplayElement *GraphicsManager::findDisplayElement(const tDisplayElementID id) {
DisplayElement *runner = _firstDisplayElement;
while (runner) {
if (runner->getObjectID() == id)
return runner;
runner = runner->_nextElement;
}
return 0;
}
void GraphicsManager::doFadeOutSync(const TimeValue, const TimeValue, uint32 color) {
if (color == 0)
color = g_system->getScreenFormat().RGBToColor(0, 0, 0);
// HACK: Until fading out is done, white-out the screen here
Graphics::Surface *screen = g_system->lockScreen();
screen->fillRect(Common::Rect(0, 0, 640, 480), color);
g_system->unlockScreen();
g_system->updateScreen();
}
void GraphicsManager::doFadeInSync(const TimeValue, const TimeValue, uint32) {
// TODO
}
void GraphicsManager::markCursorAsDirty() {
_modifiedScreen = true;
}
} // End of namespace Pegasus
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