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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.
*
* $URL$
* $Id$
*
*/
/*
* This code is based on original Hugo Trilogy source code
*
* Copyright (c) 1989-1995 David P. Gray
*
*/
#include "common/system.h"
#include "hugo/hugo.h"
#include "hugo/game.h"
#include "hugo/file.h"
#include "hugo/schedule.h"
#include "hugo/display.h"
#include "hugo/mouse.h"
#include "hugo/inventory.h"
#include "hugo/parser.h"
#include "hugo/object.h"
namespace Hugo {
static const int kMaxDisp = (kXPix / kInvDx); // Max icons displayable
InventoryHandler::InventoryHandler(HugoEngine *vm) : _vm(vm) {
}
/**
* Construct the inventory scrollbar in dib_i
* imageTotNumb is total number of inventory icons
* displayNumb is number requested for display
* scrollFl is TRUE if scroll arrows required
* firstObjId is index of first (scrolled) inventory object to display
*/
void InventoryHandler::constructInventory(int16 imageTotNumb, int displayNumb, bool scrollFl, int16 firstObjId) {
debugC(1, kDebugInventory, "constructInventory(%d, %d, %d, %d)", imageTotNumb, displayNumb, (scrollFl) ? 0 : 1, firstObjId);
// Clear out icon buffer
memset(_vm->_screen->getIconBuffer(), 0, sizeof(_vm->_screen->getIconBuffer()));
// If needed, copy arrows - reduce number of icons displayable
if (scrollFl) { // Display at first and last icon positions
_vm->_screen->moveImage(_vm->_screen->getGUIBuffer(), 0, 0, kInvDx, kInvDy, kXPix, _vm->_screen->getIconBuffer(), 0, 0, kXPix);
_vm->_screen->moveImage(_vm->_screen->getGUIBuffer(), kInvDx, 0, kInvDx, kInvDy, kXPix, _vm->_screen->getIconBuffer(), kInvDx *(kMaxDisp - 1), 0, kXPix);
displayNumb = MIN(displayNumb, kMaxDisp - kArrowNumb);
} else // No, override first index - we can show 'em all!
firstObjId = 0;
// Copy inventory icons to remaining positions
int16 displayed = 0;
int16 carried = 0;
for (int16 i = 0; (i < imageTotNumb) && (displayed < displayNumb); i++) {
if (_vm->_object->isCarried(_vm->_invent[i])) {
// Check still room to display and past first scroll index
if (displayed < displayNumb && carried >= firstObjId) {
// Compute source coordinates in dib_u
int16 ux = (i + kArrowNumb) * kInvDx % kXPix;
int16 uy = (i + kArrowNumb) * kInvDx / kXPix * kInvDy;
// Compute dest coordinates in dib_i
int16 ix = ((scrollFl) ? displayed + 1 : displayed) * kInvDx;
displayed++; // Count number displayed
// Copy the icon
_vm->_screen->moveImage(_vm->_screen->getGUIBuffer(), ux, uy, kInvDx, kInvDy, kXPix, _vm->_screen->getIconBuffer(), ix, 0, kXPix);
}
carried++; // Count number carried
}
}
}
/**
* Process required action for inventory
* Returns objId under cursor (or -1) for INV_GET
*/
int16 InventoryHandler::processInventory(invact_t action, ...) {
debugC(1, kDebugInventory, "processInventory(invact_t action, ...)");
static int16 firstIconId = 0; // Index of first icon to display
int16 imageNumb; // Total number of inventory items
int displayNumb; // Total number displayed/carried
// Compute total number and number displayed, i.e. number carried
for (imageNumb = 0, displayNumb = 0; imageNumb < _vm->_maxInvent && _vm->_invent[imageNumb] != -1; imageNumb++) {
if (_vm->_object->isCarried(_vm->_invent[imageNumb]))
displayNumb++;
}
// Will we need the scroll arrows?
bool scrollFl = displayNumb > kMaxDisp;
va_list marker; // Args used for D_ADD operation
int16 cursorx, cursory; // Current cursor position
int16 objId = -1; // Return objid under cursor
switch (action) {
case kInventoryActionInit: // Initialize inventory display
constructInventory(imageNumb, displayNumb, scrollFl, firstIconId);
break;
case kInventoryActionLeft: // Scroll left by one icon
firstIconId = MAX(0, firstIconId - 1);
constructInventory(imageNumb, displayNumb, scrollFl, firstIconId);
break;
case kInventoryActionRight: // Scroll right by one icon
firstIconId = MIN(displayNumb, firstIconId + 1);
constructInventory(imageNumb, displayNumb, scrollFl, firstIconId);
break;
case kInventoryActionGet: // Return object id under cursor
// Get cursor position from variable argument list
va_start(marker, action); // Initialize variable arguments
cursorx = va_arg(marker, int); // Cursor x
cursory = va_arg(marker, int); // Cursor y
va_end(marker); // Reset variable arguments
cursory -= kDibOffY; // Icon bar is at true zero
if (cursory > 0 && cursory < kInvDy) { // Within icon bar?
int16 i = cursorx / kInvDx; // Compute icon index
if (scrollFl) { // Scroll buttons displayed
if (i == 0) { // Left scroll button
objId = kLeftArrow;
} else {
if (i == kMaxDisp - 1) // Right scroll button
objId = kRightArrow;
else // Adjust for scroll
i += firstIconId - 1; // i is icon index
}
}
// If not an arrow, find object id - limit to valid range
if (objId == -1 && i < displayNumb) {
// Find objid by counting # carried objects == i+1
int16 j;
for (j = 0, i++; i > 0 && j < _vm->_object->_numObj; j++) {
if (_vm->_object->isCarried(j)) {
if (--i == 0)
objId = j;
}
}
}
}
break;
}
return objId; // For the INV_GET action
}
/**
* Process inventory state machine
*/
void InventoryHandler::runInventory() {
status_t &gameStatus = _vm->getGameStatus();
debugC(1, kDebugInventory, "runInventory");
switch (gameStatus.inventoryState) {
case kInventoryOff: // Icon bar off screen
break;
case kInventoryUp: // Icon bar moving up
gameStatus.inventoryHeight -= kStepDy; // Move the icon bar up
if (gameStatus.inventoryHeight <= 0) // Limit travel
gameStatus.inventoryHeight = 0;
// Move visible portion to _frontBuffer, restore uncovered portion, display results
_vm->_screen->moveImage(_vm->_screen->getIconBuffer(), 0, 0, kXPix, gameStatus.inventoryHeight, kXPix, _vm->_screen->getFrontBuffer(), 0, kDibOffY, kXPix);
_vm->_screen->moveImage(_vm->_screen->getBackBufferBackup(), 0, gameStatus.inventoryHeight + kDibOffY, kXPix, kStepDy, kXPix, _vm->_screen->getFrontBuffer(), 0, gameStatus.inventoryHeight + kDibOffY, kXPix);
_vm->_screen->displayRect(0, kDibOffY, kXPix, gameStatus.inventoryHeight + kStepDy);
if (gameStatus.inventoryHeight == 0) { // Finished moving up?
// Yes, restore dibs and exit back to game state machine
_vm->_screen->moveImage(_vm->_screen->getBackBufferBackup(), 0, 0, kXPix, kYPix, kXPix, _vm->_screen->getBackBuffer(), 0, 0, kXPix);
_vm->_screen->moveImage(_vm->_screen->getBackBuffer(), 0, 0, kXPix, kYPix, kXPix, _vm->_screen->getFrontBuffer(), 0, 0, kXPix);
_vm->_object->updateImages(); // Add objects back into display list for restore
gameStatus.inventoryState = kInventoryOff;
gameStatus.viewState = kViewPlay;
}
break;
case kInventoryDown: // Icon bar moving down
// If this is the first step, initialize dib_i
// and get any icon/text out of _frontBuffer
if (gameStatus.inventoryHeight == 0) {
processInventory(kInventoryActionInit); // Initialize dib_i
_vm->_screen->displayList(kDisplayRestore); // Restore _frontBuffer
_vm->_object->updateImages(); // Rebuild _frontBuffer without icons/text
_vm->_screen->displayList(kDisplayDisplay); // Blit display list to screen
}
gameStatus.inventoryHeight += kStepDy; // Move the icon bar down
if (gameStatus.inventoryHeight > kInvDy) // Limit travel
gameStatus.inventoryHeight = kInvDy;
// Move visible portion to _frontBuffer, display results
_vm->_screen->moveImage(_vm->_screen->getIconBuffer(), 0, 0, kXPix, gameStatus.inventoryHeight, kXPix, _vm->_screen->getFrontBuffer(), 0, kDibOffY, kXPix);
_vm->_screen->displayRect(0, kDibOffY, kXPix, gameStatus.inventoryHeight);
if (gameStatus.inventoryHeight == kInvDy) { // Finished moving down?
// Yes, prepare view dibs for special inventory display since
// we can't refresh objects while icon bar overlayed...
// 1. Save backing store _backBuffer in temporary dib_c
// 2. Make snapshot of _frontBuffer the new _backBuffer backing store
// 3. Reset the display list
_vm->_screen->moveImage(_vm->_screen->getBackBuffer(), 0, 0, kXPix, kYPix, kXPix, _vm->_screen->getBackBufferBackup(), 0, 0, kXPix);
_vm->_screen->moveImage(_vm->_screen->getFrontBuffer(), 0, 0, kXPix, kYPix, kXPix, _vm->_screen->getBackBuffer(), 0, 0, kXPix);
_vm->_screen->displayList(kDisplayInit);
gameStatus.inventoryState = kInventoryActive;
}
break;
case kInventoryActive: // Inventory active
_vm->_parser->charHandler(); // Still allow commands
_vm->_screen->displayList(kDisplayRestore); // Restore previous background
_vm->_screen->displayList(kDisplayDisplay); // Blit the display list to screen
break;
}
}
} // End of namespace Hugo
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