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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 "xeen/screen.h"
#include "xeen/resources.h"
namespace Xeen {
/**
* Constructor
*/
Screen::Screen(XeenEngine *vm) : _vm(vm) {
}
void Screen::update() {
// Merge the dirty rects
mergeDirtyRects();
// Loop through copying dirty areas to the physical screen
Common::List<Common::Rect>::iterator i;
for (i = _dirtyRects.begin(); i != _dirtyRects.end(); ++i) {
const Common::Rect &r = *i;
const byte *srcP = (const byte *)getBasePtr(r.left, r.top);
g_system->copyRectToScreen(srcP, this->pitch, r.left, r.top,
r.width(), r.height());
}
// Signal the physical screen to update
g_system->updateScreen();
_dirtyRects.clear();
}
void Screen::addDirtyRect(const Common::Rect &r) {
_dirtyRects.push_back(r);
}
void Screen::transBlitFrom(const XSurface &src, const Common::Point &destPos) {
XSurface::transBlitFrom(src, destPos);
addDirtyRect(Common::Rect(destPos.x, destPos.y, destPos.x + src.w, destPos.y + src.h));
}
void Screen::blitFrom(const XSurface &src, const Common::Point &destPos) {
XSurface::blitFrom(src, destPos);
addDirtyRect(Common::Rect(destPos.x, destPos.y, destPos.x + src.w, destPos.y + src.h));
}
void Screen::mergeDirtyRects() {
Common::List<Common::Rect>::iterator rOuter, rInner;
// Ensure dirty rect list has at least two entries
rOuter = _dirtyRects.begin();
for (int i = 0; i < 2; ++i, ++rOuter) {
if (rOuter == _dirtyRects.end())
return;
}
// Process the dirty rect list to find any rects to merge
for (rOuter = _dirtyRects.begin(); rOuter != _dirtyRects.end(); ++rOuter) {
rInner = rOuter;
while (++rInner != _dirtyRects.end()) {
if ((*rOuter).intersects(*rInner)) {
// these two rectangles overlap or
// are next to each other - merge them
unionRectangle(*rOuter, *rOuter, *rInner);
// remove the inner rect from the list
_dirtyRects.erase(rInner);
// move back to beginning of list
rInner = rOuter;
}
}
}
}
bool Screen::unionRectangle(Common::Rect &destRect, const Common::Rect &src1, const Common::Rect &src2) {
destRect = src1;
destRect.extend(src2);
return !destRect.isEmpty();
}
/**
* Load a palette resource into the temporary palette
*/
void Screen::loadPalette(const Common::String &name) {
File f(name);
f.read(_tempPaltte, PALETTE_SIZE);
}
/**
* Load a background resource into memory
*/
void Screen::loadBackground(const Common::String &name) {
File f(name);
_background.create(SCREEN_WIDTH, SCREEN_HEIGHT);
assert(f.size() == (SCREEN_WIDTH * SCREEN_HEIGHT));
f.read((byte *)_background.getPixels(), SCREEN_WIDTH * SCREEN_HEIGHT);
}
/**
* Copy a loaded background into a display page
*/
void Screen::loadPage(int pageNum) {
assert(pageNum == 0 || pageNum == 1);
if (_pages[0].empty()) {
_pages[0].create(SCREEN_WIDTH, SCREEN_HEIGHT);
_pages[1].create(SCREEN_WIDTH, SCREEN_HEIGHT);
}
_pages[pageNum].blitFrom(_background);
}
/**
* Merge the two pages along a horizontal split point
*/
void Screen::horizMerge(int xp) {
if (_pages[0].empty())
return;
for (int y = 0; y < SCREEN_HEIGHT; ++y) {
byte *destP = (byte *)_background.getBasePtr(0, y);
const byte *srcP = (const byte *)_pages[0].getBasePtr(0, y);
Common::copy(srcP, srcP + SCREEN_WIDTH - xp, destP);
if (xp != 0) {
srcP = (const byte *)_pages[1].getBasePtr(xp, y);
Common::copy(srcP, srcP + SCREEN_WIDTH - xp, destP + xp);
}
}
}
/**
* Merge the two pages along a vertical split point
*/
void Screen::vertMerge(int yp) {
if (_pages[0].empty())
return;
for (int y = 0; y < SCREEN_HEIGHT - yp; ++y) {
const byte *srcP = (const byte *)_pages[0].getBasePtr(0, y);
byte *destP = (byte *)_background.getBasePtr(0, y);
Common::copy(srcP, srcP + SCREEN_WIDTH, destP);
}
for (int y = yp; y < SCREEN_HEIGHT; ++y) {
const byte *srcP = (const byte *)_pages[1].getBasePtr(0, y);
byte *destP = (byte *)_background.getBasePtr(0, y);
Common::copy(srcP, srcP + SCREEN_WIDTH, destP);
}
}
void Screen::draw(void *data) {
// TODO: Figure out data structure that can be passed to method
assert(!data);
drawBackground();
}
void Screen::drawBackground() {
}
} // End of namespace Xeen
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