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--- IlmImf/ImfFrameBuffer.cpp.orig 2018-08-10 01:34:58 UTC
+++ IlmImf/ImfFrameBuffer.cpp
@@ -74,6 +74,88 @@ Slice::Slice (PixelType t,
// empty
}
+Slice
+Slice::Make (
+ PixelType type,
+ const void* ptr,
+ const IMATH_NAMESPACE::V2i& origin,
+ int64_t w,
+ int64_t h,
+ size_t xStride,
+ size_t yStride,
+ int xSampling,
+ int ySampling,
+ double fillValue,
+ bool xTileCoords,
+ bool yTileCoords)
+{
+ char* base = reinterpret_cast<char*> (const_cast<void *> (ptr));
+ if (xStride == 0)
+ {
+ switch (type)
+ {
+ case UINT: xStride = sizeof (uint32_t); break;
+ case HALF: xStride = sizeof (uint16_t); break;
+ case FLOAT: xStride = sizeof (float); break;
+ case NUM_PIXELTYPES:
+ THROW (IEX_NAMESPACE::ArgExc, "Invalid pixel type.");
+ }
+ }
+ if (yStride == 0)
+ yStride = static_cast<size_t> (w / xSampling) * xStride;
+
+ // data window is an int, so force promote to higher type to avoid
+ // overflow for off y (degenerate size checks should be in
+ // ImfHeader::sanityCheck, but offset can be large-ish)
+ int64_t offx = (static_cast<int64_t> (origin.x) /
+ static_cast<int64_t> (xSampling));
+ offx *= static_cast<int64_t> (xStride);
+
+ int64_t offy = (static_cast<int64_t> (origin.y) /
+ static_cast<int64_t> (ySampling));
+ offy *= static_cast<int64_t> (yStride);
+
+ return Slice (
+ type,
+ base - offx - offy,
+ xStride,
+ yStride,
+ xSampling,
+ ySampling,
+ fillValue,
+ xTileCoords,
+ yTileCoords);
+}
+
+Slice
+Slice::Make (
+ PixelType type,
+ const void* ptr,
+ const IMATH_NAMESPACE::Box2i& dataWindow,
+ size_t xStride,
+ size_t yStride,
+ int xSampling,
+ int ySampling,
+ double fillValue,
+ bool xTileCoords,
+ bool yTileCoords)
+{
+ return Make (
+ type,
+ ptr,
+ dataWindow.min,
+ static_cast<int64_t> (dataWindow.max.x) -
+ static_cast<int64_t> (dataWindow.min.x) + 1,
+ static_cast<int64_t> (dataWindow.max.y) -
+ static_cast<int64_t> (dataWindow.min.y) + 1,
+ xStride,
+ yStride,
+ xSampling,
+ ySampling,
+ fillValue,
+ xTileCoords,
+ yTileCoords);
+}
void
FrameBuffer::insert (const char name[], const Slice &slice)
|
