Kernels::Cropping< in_t, out_t > Class Template Reference

Static Public Member Functions
static void	process (AbstractBitmap &input, AbstractBitmap &output, const IntRectangle &rect, const IntPoint &outOrigin)

Detailed Description

template<class in_t, class out_t>
class Kernels::Cropping< in_t, out_t >

Definition at line 31 of file crop.cpp.

Member Function Documentation

process()

template<class in_t , class out_t >

static void Kernels::Cropping< in_t, out_t >::process ( AbstractBitmap &  input, AbstractBitmap &  output, const IntRectangle &  rect, const IntPoint &  outOrigin  )

inlinestatic

Definition at line 33 of file crop.cpp.

                                                                                                                                       {
            const unsigned char
                bpp = AbstractBitmap::BITS_PER_PIXEL[input.getPixelFormat()],
                ppb = 8 / bpp;      // pixels per byte
 
            // test if output origin and clip rect horizontal borders are byte-aligned and the pixel formats are identical
            const bool mayCopy = (input.getPixelFormat() == output.getPixelFormat()) &&
                (bpp >= 8 || (outOrigin.x % ppb == 0 && rect.a.x % ppb == 0 && rect.b.x % ppb == 0));
 
            in_t in(input);
            out_t out(output);
 
            if (mayCopy) {
                // direct copying
                const msize lineSizeBytes = bpp >= 8 ? rect.width() * bpp / 8 : rect.width() / ppb;
                for (int y = rect.a.y; y < rect.b.y; ++y) {
                    out.goTo(outOrigin.x, outOrigin.y + y - rect.a.y);
                    in.goTo(rect.a.x, y);
                    memcpy(*out, *in, lineSizeBytes);
                }
            }
            else
                // projecting
                for (int y = rect.a.y; y < rect.b.y; ++y) {
                    out.goTo(outOrigin.x, outOrigin.y + y - rect.a.y);
                    in.goTo(rect.a.x, y);
                    for (int x = rect.a.x; x < rect.b.x; ++x, in++, out++)
                        out = in();
                }
        }

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The documentation for this class was generated from the following file:

• core/bitmap/crop.cpp