remove trailing whitespace

[chaz/openbox] / render / image.c

diff --git a/render/image.c b/render/image.c
index e67077fa4d14a1d4ce99b6c65b75359d22f78b4a..2eb043a25c72ddec769f0a2ac1d82e770de89a7c 100644 (file)
--- a/render/image.c
+++ b/render/image.c
@@ -2,7 +2,7 @@
 
    image.c for the Openbox window manager
    Copyright (c) 2006        Mikael Magnusson
-   Copyright (c) 2003        Ben Jansens
+   Copyright (c) 2003-2007   Dana Jansens
 
    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
@@ -34,24 +34,24 @@ static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src,
     gulong dstX, dstY, srcX, srcY;
     gulong srcX1, srcX2, srcY1, srcY2;
     gulong ratioX, ratioY;
-    
+
     ratioX = (srcW << FRACTION) / dstW;
     ratioY = (srcH << FRACTION) / dstH;
-    
+
     srcY2 = 0;
     for (dstY = 0; dstY < dstH; dstY++) {
         srcY1 = srcY2;
         srcY2 += ratioY;
-        
+
         srcX2 = 0;
         for (dstX = 0; dstX < dstW; dstX++) {
             gulong red = 0, green = 0, blue = 0, alpha = 0;
             gulong portionX, portionY, portionXY, sumXY = 0;
             RrPixel32 pixel;
-            
+
             srcX1 = srcX2;
             srcX2 += ratioX;
-            
+
             for (srcY = srcY1; srcY < srcY2; srcY += (1UL << FRACTION)) {
                 if (srcY == srcY1) {
                     srcY = FLOOR(srcY);
@@ -63,7 +63,7 @@ static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src,
                     portionY = srcY2 - srcY;
                 else
                     portionY = (1UL << FRACTION);
-                
+
                 for (srcX = srcX1; srcX < srcX2; srcX += (1UL << FRACTION)) {
                     if (srcX == srcX1) {
                         srcX = FLOOR(srcX);
@@ -75,24 +75,29 @@ static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src,
                         portionX = srcX2 - srcX;
                     else
                         portionX = (1UL << FRACTION);
-                    
+
                     portionXY = (portionX * portionY) >> FRACTION;
                     sumXY += portionXY;
-                    
-                    pixel = *(src + (srcY >> FRACTION) * srcW + (srcX >> FRACTION));
-                    red   += ((pixel >> RrDefaultRedOffset)   & 0xFF) * portionXY;
-                    green += ((pixel >> RrDefaultGreenOffset) & 0xFF) * portionXY;
-                    blue  += ((pixel >> RrDefaultBlueOffset)  & 0xFF) * portionXY;
-                    alpha += ((pixel >> RrDefaultAlphaOffset) & 0xFF) * portionXY;
+
+                    pixel = *(src + (srcY >> FRACTION) * srcW
+                            + (srcX >> FRACTION));
+                    red   += ((pixel >> RrDefaultRedOffset)   & 0xFF)
+                             * portionXY;
+                    green += ((pixel >> RrDefaultGreenOffset) & 0xFF)
+                             * portionXY;
+                    blue  += ((pixel >> RrDefaultBlueOffset)  & 0xFF)
+                             * portionXY;
+                    alpha += ((pixel >> RrDefaultAlphaOffset) & 0xFF)
+                             * portionXY;
                 }
             }
-            
+
             g_assert(sumXY != 0);
             red   /= sumXY;
             green /= sumXY;
             blue  /= sumXY;
             alpha /= sumXY;
-            
+
             *dst++ = (red   << RrDefaultRedOffset)   |
                      (green << RrDefaultGreenOffset) |
                      (blue  << RrDefaultBlueOffset)  |
@@ -137,14 +142,18 @@ void RrImageDraw(RrPixel32 *target, RrTextureRGBA *rgba,
         source = rgba->data;
     }
 
-    /* copy source -> dest, and apply the alpha channel */
+    /* copy source -> dest, and apply the alpha channel.
+
+       center the image if it is smaller than the area */
     col = 0;
     num_pixels = dw * dh;
-    dest = target + area->x + target_w * area->y;
+    dest = target + area->x + (area->width - dw) / 2 +
+        (target_w * (area->y + (area->height - dh) / 2));
     while (num_pixels-- > 0) {
         guchar alpha, r, g, b, bgr, bgg, bgb;
 
-        alpha = *source >> RrDefaultAlphaOffset;
+        /* apply the rgba's opacity as well */
+        alpha = ((*source >> RrDefaultAlphaOffset) * rgba->alpha) >> 8;
         r = *source >> RrDefaultRedOffset;
         g = *source >> RrDefaultGreenOffset;
         b = *source >> RrDefaultBlueOffset;