-// Created on: 2014-07-18
+// Created on: 2012-07-18
// Created by: Kirill GAVRILOV
-// Copyright (c) 2014 OPEN CASCADE SAS
+// Copyright (c) 2012-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
-// This library is free software; you can redistribute it and / or modify it
-// under the terms of the GNU Lesser General Public version 2.1 as published
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
#define _Image_PixMapData_H__
#include <Image_Color.hxx>
+#include <NCollection_Buffer.hxx>
-//! POD template structure to access image buffer
-template<typename ColorType_t>
-struct Image_PixMapData
+//! Structure to manage image buffer.
+class Image_PixMapData : public NCollection_Buffer
{
+public:
- //! @return data pointer for low-level operations (copying entire buffer, parsing with extra tools etc.).
- inline const ColorType_t* Data() const
+ //! Empty constructor.
+ Image_PixMapData()
+ : NCollection_Buffer (Handle(NCollection_BaseAllocator)()),
+ myTopRowPtr (NULL),
+ SizeBPP (0),
+ SizeX (0),
+ SizeY (0),
+ SizeRowBytes (0),
+ TopToDown (Standard_Size(-1))
{
- return (const ColorType_t* )myDataPtr;
+ //
}
- //! @return data pointer for low-level operations (copying entire buffer, parsing with extra tools etc.).
- inline ColorType_t* ChangeData()
+ //! Initializer.
+ bool Init (const Handle(NCollection_BaseAllocator)& theAlloc,
+ const Standard_Size theSizeBPP,
+ const Standard_Size theSizeX,
+ const Standard_Size theSizeY,
+ const Standard_Size theSizeRowBytes,
+ Standard_Byte* theDataPtr)
{
- return (ColorType_t* )myDataPtr;
+ SetAllocator (theAlloc); // will free old data as well
+
+ myData = theDataPtr;
+ myTopRowPtr = NULL;
+ SizeBPP = theSizeBPP;
+ SizeX = theSizeX;
+ SizeY = theSizeY;
+ SizeRowBytes = theSizeRowBytes != 0 ? theSizeRowBytes : (theSizeX * theSizeBPP);
+ mySize = SizeRowBytes * SizeY;
+ if (myData == NULL)
+ {
+ Allocate (mySize);
+ }
+ SetTopDown (TopToDown == 1);
+ return !IsEmpty();
+ }
+
+ //! Reset all values to zeros.
+ void ZeroData()
+ {
+ if (myData != NULL)
+ {
+ memset (myData, 0, mySize);
+ }
}
//! @return data pointer to requested row (first column).
- inline const ColorType_t* Row (const Standard_Size theRow) const
+ inline const Standard_Byte* Row (const Standard_Size theRow) const
{
- return (ColorType_t* )(myTopRowPtr + mySizeRowBytes * theRow * myTopToDown);
+ return myTopRowPtr + SizeRowBytes * theRow * TopToDown;
}
//! @return data pointer to requested row (first column).
- inline ColorType_t* ChangeRow (const Standard_Size theRow)
+ inline Standard_Byte* ChangeRow (const Standard_Size theRow)
{
- return (ColorType_t* )(myTopRowPtr + mySizeRowBytes * theRow * myTopToDown);
+ return myTopRowPtr + SizeRowBytes * theRow * TopToDown;
}
//! @return data pointer to requested position.
- inline const ColorType_t& Value (const Standard_Size theRow,
- const Standard_Size theCol) const
+ inline const Standard_Byte* Value (const Standard_Size theRow,
+ const Standard_Size theCol) const
{
- return *(const ColorType_t* )(myTopRowPtr + mySizeRowBytes * theRow * myTopToDown + mySizeBPP * theCol);
+ return myTopRowPtr + SizeRowBytes * theRow * TopToDown + SizeBPP * theCol;
}
//! @return data pointer to requested position.
- inline ColorType_t& ChangeValue (const Standard_Size theRow,
- const Standard_Size theCol)
+ inline Standard_Byte* ChangeValue (const Standard_Size theRow,
+ const Standard_Size theCol)
{
- return *(ColorType_t* )(myTopRowPtr + mySizeRowBytes * theRow * myTopToDown + mySizeBPP * theCol);
+ return myTopRowPtr + SizeRowBytes * theRow * TopToDown + SizeBPP * theCol;
}
//! Compute the maximal row alignment for current row size.
Standard_Size anAlignment = 2;
for (; anAlignment <= 16; anAlignment <<= 1)
{
- if ((mySizeRowBytes % anAlignment) != 0 || (Standard_Size(myDataPtr) % anAlignment) != 0)
+ if ((SizeRowBytes % anAlignment) != 0 || (Standard_Size(myData) % anAlignment) != 0)
{
return (anAlignment >> 1);
}
return anAlignment;
}
- //! @return bytes allocated for the whole image plane.
- inline Standard_Size SizeBytes() const
+ //! Setup scanlines order in memory - top-down or bottom-up.
+ //! Drawers should explicitly specify this value if current state IsTopDown() was ignored!
+ //! @param theIsTopDown top-down flag
+ inline void SetTopDown (const bool theIsTopDown)
{
- return mySizeRowBytes * mySizeY;
+ TopToDown = (theIsTopDown ? 1 : Standard_Size(-1));
+ myTopRowPtr = ((TopToDown == 1 || myData == NULL)
+ ? myData : (myData + SizeRowBytes * (SizeY - 1)));
}
- //! @return image width in pixels
- inline Standard_Size SizeX() const
- {
- return mySizeX;
- }
+protected:
+
+ Standard_Byte* myTopRowPtr; //!< pointer to the topmost row (depending on scanlines order in memory)
+
+public:
+
+ Standard_Size SizeBPP; //!< bytes per pixel
+ Standard_Size SizeX; //!< width in pixels
+ Standard_Size SizeY; //!< height in pixels
+ Standard_Size SizeRowBytes; //!< number of bytes per line (in most cases equal to 3 * sizeX)
+ Standard_Size TopToDown; //!< image scanlines direction in memory from Top to the Down
- //! @return image height in pixels
- inline Standard_Size SizeY() const
- {
- return mySizeY;
- }
public:
- Standard_Byte* myDataPtr; //!< pointer to the data
- Standard_Byte* myTopRowPtr; //!< pointer to the topmost row (depending on scanlines order in memory)
- Standard_Size mySizeBPP; //!< bytes per pixel
- Standard_Size mySizeX; //!< width in pixels
- Standard_Size mySizeY; //!< height in pixels
- Standard_Size mySizeRowBytes; //!< number of bytes per line (in most cases equal to 3 * sizeX)
- Standard_Size myTopToDown; //!< image scanlines direction in memory from Top to the Down
+ DEFINE_STANDARD_RTTI_INLINE(Image_PixMapData,NCollection_Buffer) // Type definition
};
+DEFINE_STANDARD_HANDLE(Image_PixMapData, NCollection_Buffer)
+
#endif // _Image_PixMapData_H__
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