diff options
Diffstat (limited to 'engines/titanic/support/transparency_surface.cpp')
| -rw-r--r-- | engines/titanic/support/transparency_surface.cpp | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/engines/titanic/support/transparency_surface.cpp b/engines/titanic/support/transparency_surface.cpp index 5ffa8b99b1..8b5cbecc5f 100644 --- a/engines/titanic/support/transparency_surface.cpp +++ b/engines/titanic/support/transparency_surface.cpp @@ -46,7 +46,7 @@ CTransparencySurface::CTransparencySurface(const Graphics::Surface *surface, _flag1 = false; break; case TRANS_DEFAULT: - if (*(byte *)surface->getPixels() < 0x80) { + if (*(const byte *)surface->getPixels() < 0x80) { _flag1 = true; _flag2 = false; } @@ -66,8 +66,17 @@ int CTransparencySurface::moveX() { } uint CTransparencySurface::getPixel() const { - const byte *pixelP = (const byte *)_surface->getBasePtr(_pos.x, _pos.y); - return *pixelP; + byte pixel = *(const byte *)_surface->getBasePtr(_pos.x, _pos.y); + return pixel; +} + +uint CTransparencySurface::getAlpha() const { + byte pixel = getPixel(); + return _flag1 ? 0xFF - pixel : pixel; +} + +bool CTransparencySurface::isPixelTransparent() { + return getAlpha() == 0xff; } } // End of namespace Titanic |