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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/util.h"
#include "common/stack.h"
#include "graphics/primitives.h"
#include "sci/sci.h"
#include "sci/engine/kernel.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, GfxCache *cache, GfxScreen *screen, GfxCoordAdjuster16 *coordAdjuster)
: _segMan(segMan), _cache(cache), _screen(screen), _coordAdjuster(coordAdjuster) {
}
GfxCompare::~GfxCompare() {
}
uint16 GfxCompare::isOnControl(uint16 screenMask, const Common::Rect &rect) {
int16 x, y;
uint16 result = 0;
if (rect.isEmpty())
return 0;
if (screenMask & GFX_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;
}
reg_t GfxCompare::canBeHereCheckRectList(const reg_t checkObject, const Common::Rect &checkRect, const List *list, const uint16 signalFlags) const {
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 = readSelectorValue(_segMan, curObject, SELECTOR(signal));
if (!(signal & signalFlags)) {
curRect.left = readSelectorValue(_segMan, curObject, SELECTOR(brLeft));
curRect.top = readSelectorValue(_segMan, curObject, SELECTOR(brTop));
curRect.right = readSelectorValue(_segMan, curObject, SELECTOR(brRight));
curRect.bottom = readSelectorValue(_segMan, curObject, SELECTOR(brBottom));
// Check if curRect is within checkRect
// This behavior is slightly odd, but it's how the original SCI
// engine did it: a rect cannot be contained within itself
// (there is no equality). Do NOT change this to contains(), as
// it breaks KQ4 early (bug #3315639).
if (curRect.right > checkRect.left &&
curRect.left < checkRect.right &&
curRect.bottom > checkRect.top &&
curRect.top < checkRect.bottom)
return curObject;
}
}
curAddress = curNode->succ;
curNode = _segMan->lookupNode(curAddress);
}
return NULL_REG;
}
uint16 GfxCompare::kernelOnControl(byte screenMask, const 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)readSelectorValue(_segMan, objectReference, SELECTOR(view));
int16 loopNo = readSelectorValue(_segMan, objectReference, SELECTOR(loop));
int16 celNo = readSelectorValue(_segMan, objectReference, SELECTOR(cel));
int16 x = (int16)readSelectorValue(_segMan, objectReference, SELECTOR(x));
int16 y = (int16)readSelectorValue(_segMan, objectReference, SELECTOR(y));
int16 z = 0;
if (SELECTOR(z) > -1)
z = (int16)readSelectorValue(_segMan, objectReference, SELECTOR(z));
view = _cache->getView(viewId);
view->getCelRect(loopNo, celNo, x, y, z, celRect);
if (lookupSelector(_segMan, objectReference, SELECTOR(nsTop), NULL, NULL) == kSelectorVariable) {
setNSRect(objectReference, celRect);
}
}
reg_t GfxCompare::kernelCanBeHere(reg_t curObject, reg_t listReference) {
Common::Rect checkRect;
uint16 result;
checkRect.left = readSelectorValue(_segMan, curObject, SELECTOR(brLeft));
checkRect.top = readSelectorValue(_segMan, curObject, SELECTOR(brTop));
checkRect.right = readSelectorValue(_segMan, curObject, SELECTOR(brRight));
checkRect.bottom = readSelectorValue(_segMan, curObject, SELECTOR(brBottom));
uint16 signal = readSelectorValue(_segMan, curObject, SELECTOR(signal));
if (!checkRect.isValidRect()) { // can occur in Iceman and Mother Goose - HACK? TODO: is this really occuring in sierra sci? check this
warning("kCan(t)BeHere - invalid rect %d, %d -> %d, %d", checkRect.left, checkRect.top, checkRect.right, checkRect.bottom);
return NULL_REG; // this means "can be here"
}
Common::Rect adjustedRect = _coordAdjuster->onControl(checkRect);
uint16 controlMask = readSelectorValue(_segMan, curObject, SELECTOR(illegalBits));
result = isOnControl(GFX_SCREEN_MASK_CONTROL, adjustedRect) & controlMask;
if ((!result) && (signal & (kSignalIgnoreActor | kSignalRemoveView)) == 0) {
List *list = _segMan->lookupList(listReference);
if (!list)
error("kCanBeHere called with non-list as parameter");
return canBeHereCheckRectList(curObject, checkRect, list, kSignalIgnoreActor | kSignalRemoveView | kSignalNoUpdate);
}
return make_reg(0, result);
}
reg_t GfxCompare::kernelCantBeHere32(const reg_t curObject, const reg_t listReference) const {
// Most of SCI32 graphics code converts rects from the VM to exclusive
// rects before operating on them, but this call leverages SCI16 engine
// code that operates on inclusive rects, so the rect's bottom-right
// point is not modified like in other SCI32 kernel calls
Common::Rect checkRect;
// At least LSL6 hires passes invalid rectangles which trigger the
// isValidRect assertion in the Rect constructor; this is avoided by
// assigning the properties after construction and then testing the
// rect for validity ourselves here. SSCI does not care about whether
// or not the rects are valid
checkRect.left = readSelectorValue(_segMan, curObject, SELECTOR(brLeft));
checkRect.top = readSelectorValue(_segMan, curObject, SELECTOR(brTop));
checkRect.right = readSelectorValue(_segMan, curObject, SELECTOR(brRight));
checkRect.bottom = readSelectorValue(_segMan, curObject, SELECTOR(brBottom));
if (!checkRect.isValidRect()) {
return make_reg(0, 0);
}
uint16 result = 0;
uint16 signal = readSelectorValue(_segMan, curObject, SELECTOR(signal));
const uint16 signalFlags = kSignalIgnoreActor | kSignalHidden;
if ((signal & signalFlags) == 0) {
List *list = _segMan->lookupList(listReference);
if (!list) {
error("kCantBeHere called with non-list as parameter");
}
result = !canBeHereCheckRectList(curObject, checkRect, list, signalFlags).isNull();
}
return make_reg(0, result);
}
bool GfxCompare::kernelIsItSkip(GuiResourceId viewId, int16 loopNo, int16 celNo, Common::Point position) {
GfxView *tmpView = _cache->getView(viewId);
const 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);
const SciSpan<const 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 (lookupSelector(_segMan, object, SELECTOR(brLeft), NULL, NULL) == kSelectorVariable) {
int16 x = readSelectorValue(_segMan, object, SELECTOR(x));
int16 y = readSelectorValue(_segMan, object, SELECTOR(y));
int16 z = (SELECTOR(z) > -1) ? readSelectorValue(_segMan, object, SELECTOR(z)) : 0;
int16 yStep = readSelectorValue(_segMan, object, SELECTOR(yStep));
GuiResourceId viewId = readSelectorValue(_segMan, object, SELECTOR(view));
int16 loopNo = readSelectorValue(_segMan, object, SELECTOR(loop));
int16 celNo = readSelectorValue(_segMan, object, SELECTOR(cel));
uint16 scaleSignal = 0;
if (getSciVersion() >= SCI_VERSION_1_1)
scaleSignal = readSelectorValue(_segMan, object, SELECTOR(scaleSignal));
Common::Rect celRect;
GfxView *tmpView = _cache->getView(viewId);
if (!tmpView->isScaleable())
scaleSignal = 0;
if (scaleSignal & kScaleSignalDoScaling) {
celRect = getNSRect(object);
} else {
tmpView->getCelRect(loopNo, celNo, x, y, z, celRect);
}
celRect.bottom = y + 1;
celRect.top = celRect.bottom - yStep;
writeSelectorValue(_segMan, object, SELECTOR(brLeft), celRect.left);
writeSelectorValue(_segMan, object, SELECTOR(brRight), celRect.right);
writeSelectorValue(_segMan, object, SELECTOR(brTop), celRect.top);
writeSelectorValue(_segMan, object, SELECTOR(brBottom), celRect.bottom);
}
}
Common::Rect GfxCompare::getNSRect(reg_t object) {
Common::Rect nsRect;
nsRect.top = readSelectorValue(_segMan, object, SELECTOR(nsTop));
nsRect.left = readSelectorValue(_segMan, object, SELECTOR(nsLeft));
nsRect.bottom = readSelectorValue(_segMan, object, SELECTOR(nsBottom));
nsRect.right = readSelectorValue(_segMan, object, SELECTOR(nsRight));
return nsRect;
}
void GfxCompare::setNSRect(reg_t object, Common::Rect nsRect) {
writeSelectorValue(_segMan, object, SELECTOR(nsLeft), nsRect.left);
writeSelectorValue(_segMan, object, SELECTOR(nsTop), nsRect.top);
writeSelectorValue(_segMan, object, SELECTOR(nsRight), nsRect.right);
writeSelectorValue(_segMan, object, SELECTOR(nsBottom), nsRect.bottom);
}
} // End of namespace Sci
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