Re: [PATCH v4 0/1] MR3546: gdiplus: move pointer calculation outside inner loop for alpha_blend_bmp_pixels

[Jeffrey Smith (＠whydoubt)]

Jeffrey Smith (@whydoubt) commented about dlls/gdiplus/graphics.c:
>                  GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, color_over_fgpremult(dst_color, src_color));
>              else
>                  GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, color_over(dst_color, src_color));
>          }

While this goes beyond your original scope, I think it may be worth cleaning up the inner loop more extensively while you're at it.

```suggestion:-19+0
            ARGB dst_color, src_color = src_row[x];

if (comp_mode == CompositingModeSourceCopy)
                dst_color = (!(src_color & 0xff000000)) ? 0 : src_color;
            else if (!(src_color & 0xff000000))
                continue;
            else
            {
                GdipBitmapGetPixel(dst_bitmap, x+dst_x, y+dst_y, &dst_color);
                if (fmt & PixelFormatPAlpha)
                    dst_color = color_over_fgpremult(dst_color, src_color);
                else
                    dst_color = color_over(dst_color, src_color);
            }

GdipBitmapSetPixel(dst_bitmap, x+dst_x, y+dst_y, dst_color);
```