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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.
*
* $URL$
* $Id$
*
*/
#include "common/util.h"
#include "common/stack.h"
#include "graphics/primitives.h"
#include "sci/sci.h"
#include "sci/engine/state.h"
#include "sci/engine/selector.h"
#include "sci/graphics/compare.h"
#include "sci/graphics/coordadjuster.h"
#include "sci/graphics/animate.h"
#include "sci/graphics/cache.h"
#include "sci/graphics/screen.h"
#include "sci/graphics/view.h"
namespace Sci {
GfxCompare::GfxCompare(SegManager *segMan, Kernel *kernel, GfxCache *cache, GfxScreen *screen, GfxCoordAdjuster *coordAdjuster)
: _segMan(segMan), _kernel(kernel), _cache(cache), _screen(screen), _coordAdjuster(coordAdjuster) {
}
GfxCompare::~GfxCompare() {
}
uint16 GfxCompare::isOnControl(uint16 screenMask, Common::Rect rect) {
int16 x, y;
uint16 result = 0;
if (rect.isEmpty())
return 0;
if (screenMask & SCI_SCREEN_MASK_PRIORITY) {
for (y = rect.top; y < rect.bottom; y++) {
for (x = rect.left; x < rect.right; x++) {
result |= 1 << _screen->getPriority(x, y);
}
}
} else {
for (y = rect.top; y < rect.bottom; y++) {
for (x = rect.left; x < rect.right; x++) {
result |= 1 << _screen->getControl(x, y);
}
}
}
return result;
}
static inline int sign_extend_byte(int value) {
if (value & 0x80)
return value - 256;
else
return value;
}
bool GfxCompare::canBeHereCheckRectList(reg_t checkObject, Common::Rect checkRect, List *list) {
reg_t curAddress = list->first;
Node *curNode = _segMan->lookupNode(curAddress);
reg_t curObject;
uint16 signal;
Common::Rect curRect;
while (curNode) {
curObject = curNode->value;
if (curObject != checkObject) {
signal = GET_SEL32V(_segMan, curObject, SELECTOR(signal));
if ((signal & (kSignalIgnoreActor | kSignalRemoveView | kSignalNoUpdate)) == 0) {
curRect.left = GET_SEL32V(_segMan, curObject, SELECTOR(brLeft));
curRect.top = GET_SEL32V(_segMan, curObject, SELECTOR(brTop));
curRect.right = GET_SEL32V(_segMan, curObject, SELECTOR(brRight));
curRect.bottom = GET_SEL32V(_segMan, curObject, SELECTOR(brBottom));
// Check if curRect is within checkRect
// TODO: This check is slightly odd, because it means that a rect is not contained
// in itself. It may very well be that the original SCI engine did it just
// this way, so it should not be changed lightly. However, somebody should
// confirm whether the original engine really did it this way. Then, update
// this comment accordingly, and, if necessary, fix the code.
if (curRect.right > checkRect.left &&
curRect.left < checkRect.right &&
curRect.bottom > checkRect.top &&
curRect.top < checkRect.bottom) {
return false;
}
}
}
curAddress = curNode->succ;
curNode = _segMan->lookupNode(curAddress);
}
return true;
}
uint16 GfxCompare::kernelOnControl(byte screenMask, Common::Rect rect) {
Common::Rect adjustedRect = _coordAdjuster->onControl(rect);
uint16 result = isOnControl(screenMask, adjustedRect);
return result;
}
void GfxCompare::kernelSetNowSeen(reg_t objectReference) {
GfxView *view = NULL;
Common::Rect celRect(0, 0);
GuiResourceId viewId = (GuiResourceId)GET_SEL32V(_segMan, objectReference, SELECTOR(view));
int16 loopNo = sign_extend_byte((int16)GET_SEL32V(_segMan, objectReference, SELECTOR(loop)));
int16 celNo = sign_extend_byte((int16)GET_SEL32V(_segMan, objectReference, SELECTOR(cel)));
int16 x = (int16)GET_SEL32V(_segMan, objectReference, SELECTOR(x));
int16 y = (int16)GET_SEL32V(_segMan, objectReference, SELECTOR(y));
int16 z = 0;
if (_kernel->_selectorCache.z > -1)
z = (int16)GET_SEL32V(_segMan, objectReference, SELECTOR(z));
// now get cel rectangle
view = _cache->getView(viewId);
view->getCelRect(loopNo, celNo, x, y, z, &celRect);
// TODO: sometimes loop is negative. Check what it means
if (lookup_selector(_segMan, objectReference, _kernel->_selectorCache.nsTop, NULL, NULL) == kSelectorVariable) {
PUT_SEL32V(_segMan, objectReference, SELECTOR(nsLeft), celRect.left);
PUT_SEL32V(_segMan, objectReference, SELECTOR(nsRight), celRect.right);
PUT_SEL32V(_segMan, objectReference, SELECTOR(nsTop), celRect.top);
PUT_SEL32V(_segMan, objectReference, SELECTOR(nsBottom), celRect.bottom);
}
}
bool GfxCompare::kernelCanBeHere(reg_t curObject, reg_t listReference) {
Common::Rect checkRect;
Common::Rect adjustedRect;
uint16 signal, controlMask;
bool result;
checkRect.left = GET_SEL32V(_segMan, curObject, SELECTOR(brLeft));
checkRect.top = GET_SEL32V(_segMan, curObject, SELECTOR(brTop));
checkRect.right = GET_SEL32V(_segMan, curObject, SELECTOR(brRight));
checkRect.bottom = GET_SEL32V(_segMan, curObject, SELECTOR(brBottom));
adjustedRect = _coordAdjuster->onControl(checkRect);
signal = GET_SEL32V(_segMan, curObject, SELECTOR(signal));
controlMask = GET_SEL32V(_segMan, curObject, SELECTOR(illegalBits));
result = (isOnControl(SCI_SCREEN_MASK_CONTROL, adjustedRect) & controlMask) ? false : true;
if ((result) && (signal & (kSignalIgnoreActor | kSignalRemoveView)) == 0) {
List *list = _segMan->lookupList(listReference);
if (!list)
error("kCanBeHere called with non-list as parameter");
result = canBeHereCheckRectList(curObject, checkRect, list);
}
return result;
}
bool GfxCompare::kernelIsItSkip(GuiResourceId viewId, int16 loopNo, int16 celNo, Common::Point position) {
GfxView *tmpView = _cache->getView(viewId);
CelInfo *celInfo = tmpView->getCelInfo(loopNo, celNo);
position.x = CLIP<int>(position.x, 0, celInfo->width - 1);
position.y = CLIP<int>(position.y, 0, celInfo->height - 1);
byte *celData = tmpView->getBitmap(loopNo, celNo);
bool result = (celData[position.y * celInfo->width + position.x] == celInfo->clearKey);
return result;
}
void GfxCompare::kernelBaseSetter(reg_t object) {
if (lookup_selector(_segMan, object, _kernel->_selectorCache.brLeft, NULL, NULL) == kSelectorVariable) {
int16 x = GET_SEL32V(_segMan, object, SELECTOR(x));
int16 y = GET_SEL32V(_segMan, object, SELECTOR(y));
int16 z = (_kernel->_selectorCache.z > -1) ? GET_SEL32V(_segMan, object, SELECTOR(z)) : 0;
int16 yStep = GET_SEL32V(_segMan, object, SELECTOR(yStep));
GuiResourceId viewId = GET_SEL32V(_segMan, object, SELECTOR(view));
int16 loopNo = GET_SEL32V(_segMan, object, SELECTOR(loop));
int16 celNo = GET_SEL32V(_segMan, object, SELECTOR(cel));
GfxView *tmpView = _cache->getView(viewId);
Common::Rect celRect;
tmpView->getCelRect(loopNo, celNo, x, y, z, &celRect);
celRect.bottom = y + 1;
celRect.top = celRect.bottom - yStep;
PUT_SEL32V(_segMan, object, SELECTOR(brLeft), celRect.left);
PUT_SEL32V(_segMan, object, SELECTOR(brRight), celRect.right);
PUT_SEL32V(_segMan, object, SELECTOR(brTop), celRect.top);
PUT_SEL32V(_segMan, object, SELECTOR(brBottom), celRect.bottom);
}
}
} // End of namespace Sci
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