diff options
| author | Willem Jan Palenstijn | 2013-08-25 23:33:02 +0200 |
|---|---|---|
| committer | Willem Jan Palenstijn | 2013-08-25 23:36:53 +0200 |
| commit | 2141ad285e0200f4773726a13504f960e382f13e (patch) | |
| tree | 32fbca0b5915c19ce624e9b7650002e4dd9f426f | |
| parent | e9cbda135bbc822009ff311cad6e420fb23cff82 (diff) | |
| download | scummvm-rg350-2141ad285e0200f4773726a13504f960e382f13e.tar.gz scummvm-rg350-2141ad285e0200f4773726a13504f960e382f13e.tar.bz2 scummvm-rg350-2141ad285e0200f4773726a13504f960e382f13e.zip | |
WINTERMUTE: Fix colormod with alpha blending
Now apply colormod only to the src color instead of to the dst.
The original code did this inconsistently depending on if the
colormod was 0 or not.
| -rw-r--r-- | engines/wintermute/graphics/transparent_surface.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/engines/wintermute/graphics/transparent_surface.cpp b/engines/wintermute/graphics/transparent_surface.cpp index 00a3db83fd..cd200354f7 100644 --- a/engines/wintermute/graphics/transparent_surface.cpp +++ b/engines/wintermute/graphics/transparent_surface.cpp @@ -468,21 +468,21 @@ Common::Rect TransparentSurface::blit(Graphics::Surface &target, int posX, int p outg = ((o_pix >> gShiftTarget) & 0xff) * (255 - a); outr = ((o_pix >> rShiftTarget) & 0xff) * (255 - a); if (cb == 0) - outb = 0; + outb = outb >> 8; else if (cb != 255) - outb = ((outb + b * a) * cb) >> 16; + outb = ((outb<<8) + b * a * cb) >> 16; else outb = (outb + b * a) >> 8; if (cg == 0) - outg = 0; + outg = outg >> 8; else if (cg != 255) - outg = ((outg + g * a) * cg) >> 16; + outg = ((outg<<8) + g * a * cg) >> 16; else outg = (outg + g * a) >> 8; if (cr == 0) - outr = 0; + outr = outr >> 8; else if (cr != 255) - outr = ((outr + r * a) * cr) >> 16; + outr = ((outr<<8) + r * a * cr) >> 16; else outr = (outr + r * a) >> 8; out[aIndex] = outa; |