Table of Contents
zmap_tile_GetDataPtrDescriptionRetrieve the raw memory pointer to the data block of a mosaic tile. Files
Function prototypevoid* zmap_tile_GetDataPtr(void* hTile); Arguments
Return valueA null pointer if:
A valid non-null pointer otherwise. CommentsPixel orderingPixels are ordered in rows going east-to-west, with rows ordered south to north. To convert from x/y coordinate to memory offset, use the following formula: long offset = (x + TileSize * y) * PixelMemSize; …where PixelMemSize is the size in memory of one pixel (see zmap_GetPixelSize). To convert from memory offsets to pixel coordinates, use the following formulae: long x = (offset/PixelMemSize)%TileSize; long y = (offset/PixelMemSize)/TileSize; Use zmap_tile_GetPixel / zmap_tile_SetPixel where possible
It is recommended that, wherever possible, the zmap_tile_GetPixel /zmap_tile_SetPixel functions are used for accessing tile data, instead of direct memory access with Except where otherwise noted, content on this wiki is licensed under the following license:CC Attribution-Share Alike 3.0 Unported
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