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engines/ultima/ultima1/u1gfx/sprites.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 "ultima/ultima1/u1gfx/sprites.h"
+#include "ultima/shared/early/ultima_early.h"
+#include "ultima/shared/early/game.h"
+
+namespace Ultima {
+namespace Ultima1 {
+namespace U1Gfx {
+
+BEGIN_MESSAGE_MAP(Sprites, Shared::TreeItem)
+	ON_MESSAGE(FrameMsg)
+END_MESSAGE_MAP()
+
+#define ANIMATE_FRAME_DELAY 200
+
+void Sprites::load(bool isOverworld) {
+	_isOverworld = isOverworld;
+
+	if (isOverworld)
+		Shared::Gfx::Sprites::load("t1ktiles.bin", 4);
+	else
+		Shared::Gfx::Sprites::load("t1ktown.bin", 4, 8, 8);
+}
+
+bool Sprites::FrameMsg(CFrameMsg *msg) {
+	if (!empty() && _isOverworld) {
+		animateWater();
+	}
+
+	++_frameCtr;
+
+	return false;
+}
+
+void Sprites::animateWater() {
+	byte lineBuffer[16];
+	Shared::Gfx::Sprite &sprite = (*this)[0];
+
+	Common::copy(sprite.getBasePtr(0, 15), sprite.getBasePtr(0, 16), lineBuffer);
+	Common::copy_backward(sprite.getBasePtr(0, 0), sprite.getBasePtr(0, 15), sprite.getBasePtr(0, 16));
+	Common::copy(lineBuffer, lineBuffer + 16, sprite.getBasePtr(0, 0));
+}
+
+Shared::Gfx::Sprite &Sprites::operator[](uint idx) {
+	int offset = 2;
+	if ((_frameCtr % 6) == 0)
+		offset = 0;
+	else if ((_frameCtr % 3) == 0)
+		offset = 1;
+
+	if (!_isOverworld) {
+		// Don't do overworld tile animations within the cities and castles
+		return Shared::Gfx::Sprites::operator[](idx);
+	} else if (idx == 4 && offset != 2) {
+		// Castle flag waving
+		return Shared::Gfx::Sprites::operator[](4 + offset);
+	} else if (idx == 6) {
+		// City flag waving
+		return Shared::Gfx::Sprites::operator[](7 + ((_frameCtr & 3) ? 1 : 0));
+	} else {
+		if (idx >= 7 && idx < 50)
+			idx += 2;
+
+		if (idx == 14 || idx == 25) {
+			// Transports
+			return Shared::Gfx::Sprites::operator[](idx + (_frameCtr & 1));
+		} else if (idx >= 19 && idx <= 47) {
+			// Random monster animation
+			return Shared::Gfx::Sprites::operator[](idx + (g_vm->getRandomNumber(1, 100) & 1));
+		} else {
+			return Shared::Gfx::Sprites::operator[](idx);
+		}
+	}
+}
+
+} // End of namespace U1Gfx
+} // End of namespace Ultima1
+} // End of namespace Ultima