Dynamically scaling background for login screen

Hacked Graphics::drawRescaledImage a bit to make it work...

11 files changed, 65 insertions, 6 deletions

diff --git a/data/graphics/gui/CMakeLists.txt b/data/graphics/gui/CMakeLists.txt
index 51782750..ab114449 100644
--- a/data/graphics/gui/CMakeLists.txt
+++ b/data/graphics/gui/CMakeLists.txt
@@ -1,4 +1,5 @@
 SET (FILES
+    bg.xml
     bubble.png
     button.png
     button-icon-confirm.png
@@ -37,6 +38,7 @@ SET (FILES
     radioout.png
     radioout_highlight.png
     resize.png
+    scrolls.png
     selection.png
     slider.png
     slider_hilight.png
diff --git a/data/graphics/images/bg.xml b/data/graphics/gui/bg.xml
index c4fd11f6..c4fd11f6 100644
--- a/data/graphics/images/bg.xml
+++ b/data/graphics/gui/bg.xml
diff --git a/data/graphics/images/scrolls.png b/data/graphics/gui/scrolls.png
index 79f534e3..79f534e3 100644
--- a/data/graphics/images/scrolls.png
+++ b/data/graphics/gui/scrolls.png
diff --git a/data/graphics/images/CMakeLists.txt b/data/graphics/images/CMakeLists.txt
index 6694f254..f3fa7180 100644
--- a/data/graphics/images/CMakeLists.txt
+++ b/data/graphics/images/CMakeLists.txt
@@ -1,5 +1,6 @@
 SET(FILES
-    login_wallpaper.png
+    bg_image.png
+    bg_overlay.png
     )
 
 INSTALL(FILES ${FILES} DESTINATION ${DATA_DIR}/graphics/images)
diff --git a/data/graphics/images/login_wallpaper.png b/data/graphics/images/login_wallpaper.png
deleted file mode 100644
index 109acccd..00000000
--- a/data/graphics/images/login_wallpaper.png
+++ /dev/null
diff --git a/src/graphics.cpp b/src/graphics.cpp
index 61cc78ba..08b1b298 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -188,8 +188,8 @@ bool Graphics::drawRescaledImage(Image *image, int srcX, int srcY,
     SDL_Rect srcRect;
     dstRect.x = dstX; dstRect.y = dstY;
     srcRect.x = srcX; srcRect.y = srcY;
-    srcRect.w = width;
-    srcRect.h = height;
+    srcRect.w = tmpImage->getWidth();
+    srcRect.h = tmpImage->getHeight();
 
     returnValue = !(SDL_BlitSurface(tmpImage->mSDLSurface, &srcRect,
                                     mTarget, &dstRect) < 0);
diff --git a/src/graphics.h b/src/graphics.h
index 4c1b2561..36a9adb9 100644
--- a/src/graphics.h
+++ b/src/graphics.h
@@ -102,7 +102,7 @@ class Graphics : public gcn::SDLGraphics
         bool drawImage(Image *image, int x, int y);
 
         /**
-         * Draws a resclaled version of the image
+         * Draws a rescaled version of the image.
          */
         bool drawRescaledImage(Image *image, int srcX, int srcY,
                                int dstX, int dstY,
@@ -115,7 +115,7 @@ class Graphics : public gcn::SDLGraphics
                                    false); }
 
         /**
-         * Draws a resclaled version of the image
+         * Draws a rescaled version of the image.
          */
         virtual bool drawRescaledImage(Image *image, int srcX, int srcY,
                                int dstX, int dstY,
diff --git a/src/gui/widgets/desktop.cpp b/src/gui/widgets/desktop.cpp
index ce609891..ec76f861 100644
--- a/src/gui/widgets/desktop.cpp
+++ b/src/gui/widgets/desktop.cpp
@@ -32,12 +32,16 @@
 
 #include "resources/image.h"
 #include "resources/resourcemanager.h"
+#include "resources/theme.h"
 #include "resources/wallpaper.h"
 
 #include "utils/stringutils.h"
 
 Desktop::Desktop()
     : mWallpaper(0)
+    , mBackground(ResourceManager::getInstance()->getImage("graphics/images/bg_image.png"))
+    , mOverlay(ResourceManager::getInstance()->getImage("graphics/images/bg_overlay.png"))
+    , mBgSkin(Theme::instance()->load("bg.xml"))
 {
     addWidgetListener(this);
 
@@ -59,6 +63,10 @@ Desktop::~Desktop()
 {
     if (mWallpaper)
         mWallpaper->decRef();
+
+    mBgSkin->instances--;
+    mBackground->decRef();
+    mOverlay->decRef();
 }
 
 void Desktop::reloadWallpaper()
@@ -96,6 +104,41 @@ void Desktop::draw(gcn::Graphics *graphics)
                 getWidth(), getHeight(), false);
     }
 
+    mBgSkin->setAlpha(1.0f);
+    g->drawImageRect(gcn::Rectangle(5, 5, getWidth() - 10, getHeight() - 10),
+                     mBgSkin->getBorder());
+
+    gcn::Rectangle innerArea(5 + 64,
+                             5 + 64,
+                             getWidth() - 10 - 64 * 2,
+                             getHeight() - 10 - 64 * 2);
+
+    if (innerArea.width > 0 && innerArea.height > 0)
+    {
+        g->pushClipArea(innerArea);
+
+        float scale = std::max((float) innerArea.width / mBackground->getWidth(),
+                               (float) innerArea.height / mBackground->getHeight());
+
+        int width = scale * mBackground->getWidth();
+        int height = scale * mBackground->getHeight();
+
+        g->drawRescaledImage(mBackground, 0, 0,
+                             (innerArea.width - width) / 2,
+                             (innerArea.height - height) / 2,
+                             mBackground->getWidth(),
+                             mBackground->getHeight(),
+                             width, height, false);
+
+        g->drawRescaledImage(mOverlay, 0, 0, -1, -1,
+                             mOverlay->getWidth(),
+                             mOverlay->getHeight(),
+                             innerArea.width + 2,
+                             innerArea.height + 2, false);
+
+        g->popClipArea();
+    }
+
     // Draw a thin border under the application version...
     g->setColor(gcn::Color(255, 255, 255, 128));
     g->fillRectangle(gcn::Rectangle(mVersionLabel->getDimension()));
diff --git a/src/gui/widgets/desktop.h b/src/gui/widgets/desktop.h
index 8ecb7e03..e2ff207c 100644
--- a/src/gui/widgets/desktop.h
+++ b/src/gui/widgets/desktop.h
@@ -29,6 +29,7 @@
 #include <guichan/widgetlistener.hpp>
 
 class Image;
+class Skin;
 
 /**
  * Desktop widget, for drawing a background image and color.
@@ -62,6 +63,9 @@ class Desktop : public Container, gcn::WidgetListener
         void setBestFittingWallpaper();
 
         Image *mWallpaper;
+        Image *mBackground;
+        Image *mOverlay;
+        Skin *mBgSkin;
         gcn::Label *mVersionLabel;
 };
 
diff --git a/src/resources/theme.cpp b/src/resources/theme.cpp
index dde7bb3c..036cd4a3 100644
--- a/src/resources/theme.cpp
+++ b/src/resources/theme.cpp
@@ -82,8 +82,12 @@ Skin::~Skin()
 void Skin::updateAlpha(float minimumOpacityAllowed)
 {
     const float alpha = std::max(minimumOpacityAllowed,
-                                              config.getFloatValue("guialpha"));
+                                 config.getFloatValue("guialpha"));
+    setAlpha(alpha);
+}
 
+void Skin::setAlpha(float alpha)
+{
     for_each(mBorder.grid, mBorder.grid + 9,
              std::bind2nd(std::mem_fun(&Image::setAlpha), alpha));
 
diff --git a/src/resources/theme.h b/src/resources/theme.h
index 98904518..426f1a7e 100644
--- a/src/resources/theme.h
+++ b/src/resources/theme.h
@@ -89,6 +89,11 @@ class Skin
          */
         void updateAlpha(float minimumOpacityAllowed = 0.0f);
 
+        /**
+         * Sets the alpha, overriding GUI opacity level.
+         */
+        void setAlpha(float alpha);
+
         int instances;
 
     private: