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engines/mm/xeen/screen.cpp

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/system.h"
+#include "graphics/paletteman.h"
+#include "graphics/surface.h"
+#include "mm/xeen/screen.h"
+#include "mm/xeen/resources.h"
+#include "mm/xeen/window.h"
+#include "mm/xeen/xeen.h"
+
+namespace MM {
+namespace Xeen {
+
+Screen::Screen(XeenEngine *vm) : _vm(vm) {
+	_fadeIn = false;
+	create(SCREEN_WIDTH, SCREEN_HEIGHT);
+	Common::fill(&_tempPalette[0], &_tempPalette[PALETTE_SIZE], 0);
+	Common::fill(&_mainPalette[0], &_mainPalette[PALETTE_SIZE], 0);
+}
+
+void Screen::loadPalette(const Common::Path &name) {
+	File f(name);
+	for (int i = 0; i < PALETTE_SIZE; ++i)
+		_tempPalette[i] = f.readByte() << 2;
+}
+
+void Screen::loadBackground(const Common::Path &name) {
+	File f(name);
+
+	assert(f.size() == (SCREEN_WIDTH * SCREEN_HEIGHT));
+	f.read((byte *)getPixels(), SCREEN_WIDTH * SCREEN_HEIGHT);
+	addDirtyRect(Common::Rect(0, 0, this->w, this->h));
+}
+
+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(*this);
+}
+
+void Screen::freePages() {
+	_pages[0].free();
+	_pages[1].free();
+}
+
+void Screen::horizMerge(int xp) {
+	if (_pages[0].empty())
+		return;
+
+	for (int y = 0; y < SCREEN_HEIGHT; ++y) {
+		byte *destP = (byte *)getBasePtr(0, y);
+		const byte *srcP = (const byte *)_pages[0].getBasePtr(xp, y);
+		Common::copy(srcP, srcP + SCREEN_WIDTH - xp, destP);
+
+		if (xp != 0) {
+			destP = (byte *)getBasePtr(SCREEN_WIDTH - xp, y);
+			srcP = (const byte *)_pages[1].getBasePtr(0, y);
+			Common::copy(srcP, srcP + xp, destP);
+		}
+	}
+
+	markAllDirty();
+}
+
+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, yp + y);
+		byte *destP = (byte *)getBasePtr(0, y);
+		Common::copy(srcP, srcP + SCREEN_WIDTH, destP);
+	}
+
+	for (int y = 0; y < yp; ++y) {
+		const byte *srcP = (const byte *)_pages[1].getBasePtr(0, y);
+		byte *destP = (byte *)getBasePtr(0, SCREEN_HEIGHT - yp + y);
+		Common::copy(srcP, srcP + SCREEN_WIDTH, destP);
+	}
+
+	markAllDirty();
+}
+
+void Screen::drawScreen() {
+	addDirtyRect(Common::Rect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT));
+}
+
+void Screen::fadeIn(int step) {
+	_fadeIn = true;
+	fadeInner(step);
+}
+
+void Screen::fadeOut(int step) {
+	_fadeIn = false;
+	fadeInner(step);
+}
+
+void Screen::fadeInner(int step) {
+	for (int idx = 128; idx >= 0 && !_vm->shouldExit(); idx -= step) {
+		int val = MAX(idx, 0);
+		bool flag = !_fadeIn;
+		if (!flag) {
+			val = -(val - 128);
+			flag = step != 0x81;
+		}
+
+		if (!flag) {
+			step = 0x80;
+		} else {
+			// Create a scaled palette from the temporary one
+			for (int i = 0; i < PALETTE_SIZE; ++i) {
+				_mainPalette[i] = (_tempPalette[i] * val * 2) >> 8;
+			}
+
+			updatePalette();
+		}
+
+		_vm->_events->pollEventsAndWait();
+	}
+
+	update();
+}
+
+void Screen::updatePalette() {
+	updatePalette(_mainPalette, 0, 16);
+}
+
+void Screen::updatePalette(const byte *pal, int start, int count16) {
+	g_system->getPaletteManager()->setPalette(pal, start, count16 * 16);
+}
+
+void Screen::saveBackground(int slot) {
+	assert(slot > 0 && slot < 10);
+	_savedScreens[slot - 1].copyFrom(*this);
+}
+
+void Screen::restoreBackground(int slot) {
+	assert(slot > 0 && slot < 10);
+
+	blitFrom(_savedScreens[slot - 1]);
+}
+
+bool Screen::doScroll(bool rollUp, bool fadeInFlag) {
+	Screen &screen = *_vm->_screen;
+	EventsManager &events = *_vm->_events;
+	const int SCROLL_L[8] = { 29, 23, 15, -5, -11, -23, -49, -71 };
+	const int SCROLL_R[8] = { 165, 171, 198, 218, 228, 245, 264, 281 };
+
+	if (_vm->_files->_ccNum) {
+		if (fadeInFlag)
+			screen.fadeIn(2);
+		return _vm->shouldExit();
+	}
+
+	screen.saveBackground();
+
+	// Load hand sprites
+	SpriteResource *hand[16];
+	for (int i = 0; i < 16; ++i) {
+		Common::Path name(Common::String::format("hand%02d.vga", i));
+		hand[i] = new SpriteResource(name);
+	}
+
+	// Load marb sprites
+	SpriteResource *marb[5];
+	for (int i = 0; i < 4; ++i) {
+		Common::Path name(Common::String::format("marb%02d.vga", i + 1));
+		marb[i] = new SpriteResource(name);
+	}
+
+	if (rollUp) {
+		for (int i = 22, ctr = 7; i > 0 && !events.isKeyMousePressed()
+			&& !_vm->shouldExit(); --i) {
+			events.updateGameCounter();
+			screen.restoreBackground();
+
+			if (i > 14) {
+				hand[14]->draw(0, 0, Common::Point(SCROLL_L[ctr], 0), SPRFLAG_800);
+				hand[15]->draw(0, 0, Common::Point(SCROLL_R[ctr], 0), SPRFLAG_800);
+				--ctr;
+			} else if (i != 0) {
+				hand[i - 1]->draw(0, 0);
+			}
+
+			if (i <= 20)
+				marb[(i - 1) / 5]->draw(0, (i - 1) % 5);
+			screen.update();
+
+			while (!_vm->shouldExit() && events.timeElapsed() == 0)
+				events.pollEventsAndWait();
+
+			if (i == 0 && fadeInFlag)
+				screen.fadeIn(2);
+		}
+	} else {
+		for (int i = 0, ctr = 0; i < 22 && !events.isKeyMousePressed()
+			&& !_vm->shouldExit(); ++i) {
+			events.updateGameCounter();
+			screen.restoreBackground();
+
+			if (i < 14) {
+				hand[i]->draw(0, 0);
+			} else {
+				hand[14]->draw(0, 0, Common::Point(SCROLL_L[ctr], 0), SPRFLAG_800);
+				hand[15]->draw(0, 0, Common::Point(SCROLL_R[ctr], 0), SPRFLAG_800);
+				++ctr;
+			}
+
+			if (i < 20) {
+				marb[i / 5]->draw(0, i % 5);
+			}
+			screen.update();
+
+			while (!_vm->shouldExit() && events.timeElapsed() == 0)
+				events.pollEventsAndWait();
+
+			if (i == 0 && fadeInFlag)
+				screen.fadeIn(2);
+		}
+	}
+
+	if (rollUp) {
+		hand[0]->draw(0, 0);
+		marb[0]->draw(0, 0);
+	} else {
+		screen.restoreBackground();
+	}
+	screen.update();
+
+	// Free resources
+	for (int i = 0; i < 4; ++i)
+		delete marb[i];
+	for (int i = 0; i < 16; ++i)
+		delete hand[i];
+
+	return _vm->shouldExit() || events.isKeyMousePressed();
+}
+
+} // End of namespace Xeen
+} // End of namespace MM