dng_simple_image::dng_simple_image (const dng_rect &bounds,
uint32 planes,
uint32 pixelType,
dng_memory_allocator &allocator)
: dng_image (bounds,
planes,
pixelType)
, fMemory ()
, fAllocator (allocator)
{
uint32 bytes =
ComputeBufferSize (pixelType, bounds.Size (), planes, pad16Bytes);
fMemory.Reset (allocator.Allocate (bytes));
fBuffer = dng_pixel_buffer (bounds, 0, planes, pixelType, pcInterleaved, fMemory->Buffer ());
}
void dng_image::GetRepeat (dng_pixel_buffer &buffer,
const dng_rect &srcArea,
const dng_rect &dstArea) const
{
// If we already have the entire srcArea in the
// buffer, we can just repeat that.
if ((srcArea & buffer.fArea) == srcArea)
{
buffer.RepeatArea (srcArea,
dstArea);
}
// Else we first need to get the srcArea into the buffer area.
else
{
// Find repeating pattern size.
dng_point repeat = srcArea.Size ();
// Find pattern phase at top-left corner of destination area.
dng_point phase = dng_pixel_buffer::RepeatPhase (srcArea,
dstArea);
// Find new source area at top-left of dstArea.
dng_rect newArea = srcArea + (dstArea.TL () -
srcArea.TL ());
// Find quadrant split coordinates.
int32 splitV = newArea.t + repeat.v - phase.v;
int32 splitH = newArea.l + repeat.h - phase.h;
// Top-left quadrant.
dng_rect dst1 (dng_rect (newArea.t,
newArea.l,
splitV,
splitH) & dstArea);
if (dst1.NotEmpty ())
{
dng_pixel_buffer temp (buffer);
temp.fArea = dst1 + (srcArea.TL () -
dstArea.TL () +
dng_point (phase.v, phase.h));
temp.fData = buffer.DirtyPixel (dst1.t,
dst1.l,
buffer.fPlane);
DoGet (temp);
}
// Top-right quadrant.
dng_rect dst2 (dng_rect (newArea.t,
splitH,
splitV,
newArea.r) & dstArea);
if (dst2.NotEmpty ())
{
dng_pixel_buffer temp (buffer);
temp.fArea = dst2 + (srcArea.TL () -
dstArea.TL () +
dng_point (phase.v, -phase.h));
temp.fData = buffer.DirtyPixel (dst2.t,
dst2.l,
buffer.fPlane);
DoGet (temp);
}
// Bottom-left quadrant.
dng_rect dst3 (dng_rect (splitV,
newArea.l,
newArea.b,
splitH) & dstArea);
if (dst3.NotEmpty ())
{
dng_pixel_buffer temp (buffer);
temp.fArea = dst3 + (srcArea.TL () -
dstArea.TL () +
dng_point (-phase.v, phase.h));
temp.fData = buffer.DirtyPixel (dst3.t,
dst3.l,
buffer.fPlane);
DoGet (temp);
}
// Bottom-right quadrant.
dng_rect dst4 (dng_rect (splitV,
splitH,
newArea.b,
newArea.r) & dstArea);
if (dst4.NotEmpty ())
{
dng_pixel_buffer temp (buffer);
temp.fArea = dst4 + (srcArea.TL () -
dstArea.TL () +
dng_point (-phase.v, -phase.h));
temp.fData = buffer.DirtyPixel (dst4.t,
dst4.l,
buffer.fPlane);
DoGet (temp);
}
// Replicate this new source area.
buffer.RepeatArea (newArea,
dstArea);
}
}