diff options
Diffstat (limited to 'graphics/surface.h')
-rw-r--r-- | graphics/surface.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/graphics/surface.h b/graphics/surface.h index e5685bf997..414a734683 100644 --- a/graphics/surface.h +++ b/graphics/surface.h @@ -343,19 +343,71 @@ struct SharedPtrSurfaceDeleter { } }; +/** + * Stack-based flood fill algorithm for arbitrary Surfaces. + * + * It could be used in 2 ways. One is to fill the pixels of oldColor + * with fillColor. Second is when the surface stays intact but another + * surface with mask is created, where filled colors are marked with 255. + * + * Before running fill() or fillMask(), the initial pixels must be addSeed + * with addSeed() method. + */ class FloodFill { public: + /** + * Construct a simple Surface object. + * + * @param surface Input surface + * @param oldColor Color on the surface to change + * @param fillColor Color to fill with + */ FloodFill(Surface *surface, uint32 oldColor, uint32 fillColor); ~FloodFill(); + + /** + * Add pixels to the fill queue. + * + * @param x The x coordinate of the pixel. + * @param y The x coordinate of the pixel. + */ void addSeed(int x, int y); + + /** + * Fill the surface as requested. + * + * It uses pixels which were added with addSeed() method. + * + * @see addSeed + */ void fill(); + /** + * Fill the mask. The mask is a CLUT8 Surface with pixels 0 and 255. + * 255 means that the pixel has been filled. + * + * It uses pixels which were added with addSeed() method. + * + * @see addSeed + */ + void fillMask(); + + /** + * Get the resulting mask. + * + * @see fillMask + */ + Surface *getMask() { return _mask; } + private: Common::List<Common::Point *> _queue; Surface *_surface; + Surface *_mask; uint32 _oldColor, _fillColor; byte *_visited; int _w, _h; + + bool _maskMode; }; } // End of namespace Graphics |