[PATCH v3 1/1] gdiplus: move pointer calculation outside inner loop to improve performance

[Bartosz Kosiorek]

From: Bartosz Kosiorek

---
 dlls/gdiplus/graphics.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index e3b5661fd67..a2a9c3db186 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -422,28 +422,27 @@ static GpStatus alpha_blend_bmp_pixels(GpGraphics *graphics, INT dst_x, INT dst_

for (y=0; y<src_height; y++)
     {
+        ARGB *src_color = (ARGB*)(src + src_stride * y);
         for (x=0; x<src_width; x++)
         {
-            ARGB dst_color, src_color;
-            src_color = ((ARGB*)(src + src_stride * y))[x];
-
             if (comp_mode == CompositingModeSourceCopy)
             {
-                if (!(src_color & 0xff000000))
+                if (!(src_color[x] & 0xff000000))
                     GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, 0);
                 else
-                    GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, src_color);
+                    GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, src_color[x]);
             }
             else
             {
-                if (!(src_color & 0xff000000))
+                ARGB dst_color;
+                if (!(src_color[x] & 0xff000000))
                     continue;

GdipBitmapGetPixel(dst_bitmap, x+dst_x, y+dst_y, &dst_color);
                 if (fmt & PixelFormatPAlpha)
-                    GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, color_over_fgpremult(dst_color, src_color));
+                    GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, color_over_fgpremult(dst_color, src_color[x]));
                 else
-                    GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, color_over(dst_color, src_color));
+                    GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, color_over(dst_color, src_color[x]));
             }
         }
     }