1 files changed, 103 insertions, 0 deletions
diff --git a/src/resources/ambientlayer.cpp b/src/resources/ambientlayer.cpp
new file mode 100644
index 00000000..92895bc2
--- /dev/null
+++ b/src/resources/ambientlayer.cpp
@@ -0,0 +1,103 @@
+/*
+ *  The Mana World
+ *  Copyright (C) 2004  The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  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
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "resources/ambientlayer.h"
+
+#include "resources/image.h"
+#include "resources/resourcemanager.h"
+#include "graphics.h"
+
+AmbientLayer::AmbientLayer(Image *img, float parallax,
+                               float speedX, float speedY, bool keepRatio):
+    mImage(img), mParallax(parallax),
+    mPosX(0), mPosY(0),
+    mSpeedX(speedX), mSpeedY(speedY),
+    mKeepRatio(keepRatio)
+{
+
+    if (keepRatio && !mImage->isAnOpenGLOne()
+        && defaultScreenWidth != 0
+        && defaultScreenHeight != 0
+        && graphics->getWidth() != defaultScreenWidth
+        && graphics->getHeight() != defaultScreenHeight)
+    {
+        // Rescale the overlay to keep the ratio as if we were on
+        // the default resolution...
+        Image *rescaledOverlay = mImage->SDLgetScaledImage(
+         (int) mImage->getWidth() / defaultScreenWidth * graphics->getWidth(),
+     (int) mImage->getHeight() / defaultScreenHeight * graphics->getHeight());
+
+        if (rescaledOverlay)
+        {
+            // Replace the resource with the new one...
+            std::string idPath = mImage->getIdPath() + "_rescaled";
+            ResourceManager::getInstance()->addResource(idPath, rescaledOverlay);
+            mImage = rescaledOverlay;
+        }
+        else
+            mImage->incRef();
+    }
+    else
+        mImage->incRef();
+}
+
+AmbientLayer::~AmbientLayer()
+{
+    mImage->decRef();
+}
+
+void AmbientLayer::update(int timePassed, float dx, float dy)
+{
+    // Self scrolling of the overlay
+    mPosX -= mSpeedX * timePassed / 10;
+    mPosY -= mSpeedY * timePassed / 10;
+
+    // Parallax scrolling
+    mPosX += dx * mParallax;
+    mPosY += dy * mParallax;
+
+    int imgW = mImage->getWidth();
+    int imgH = mImage->getHeight();
+
+    // Wrap values
+    while (mPosX > imgW)
+        mPosX -= imgW;
+    while (mPosX < 0)
+        mPosX += imgW;
+
+    while (mPosY > imgH)
+        mPosY -= imgH;
+    while (mPosY < 0)
+        mPosY += imgH;
+}
+
+void AmbientLayer::draw(Graphics *graphics, int x, int y)
+{
+    if (!mImage->isAnOpenGLOne() || !mKeepRatio)
+        graphics->drawImagePattern(mImage,
+            (int) -mPosX, (int) -mPosY, x + (int) mPosX, y + (int) mPosY);
+    else
+        graphics->drawRescaledImagePattern(mImage,
+              (int) -mPosX, (int) -mPosY, x + (int) mPosX, y + (int) mPosY,
+         (int) mImage->getWidth() / defaultScreenWidth * graphics->getWidth(),
+     (int) mImage->getHeight() / defaultScreenHeight * graphics->getHeight());
+
+}