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--- IlmImf/ImfFrameBuffer.h.orig 2018-08-10 01:34:58 UTC
+++ IlmImf/ImfFrameBuffer.h
@@ -48,14 +48,15 @@
#include "ImfPixelType.h"
#include "ImfExport.h"
#include "ImfNamespace.h"
+#include "ImathBox.h"
#include <map>
#include <string>
+#include <cstdint>
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
-
//-------------------------------------------------------
// Description of a single slice of the frame buffer:
//
@@ -148,6 +149,36 @@ struct Slice
double fillValue = 0.0,
bool xTileCoords = false,
bool yTileCoords = false);
+
+ // Does the heavy lifting of computing the base pointer for a slice,
+ // avoiding overflow issues with large origin offsets
+ //
+ // if xStride == 0, assumes sizeof(pixeltype)
+ // if yStride == 0, assumes xStride * ( w / xSampling )
+ static Slice Make(PixelType type,
+ const void *ptr,
+ const IMATH_NAMESPACE::V2i &origin,
+ int64_t w,
+ int64_t h,
+ size_t xStride = 0,
+ size_t yStride = 0,
+ int xSampling = 1,
+ int ySampling = 1,
+ double fillValue = 0.0,
+ bool xTileCoords = false,
+ bool yTileCoords = false);
+ // same as above, just computes w and h for you
+ // from a data window
+ static Slice Make(PixelType type,
+ const void *ptr,
+ const IMATH_NAMESPACE::Box2i &dataWindow,
+ size_t xStride = 0,
+ size_t yStride = 0,
+ int xSampling = 1,
+ int ySampling = 1,
+ double fillValue = 0.0,
+ bool xTileCoords = false,
+ bool yTileCoords = false);
};
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