///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
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// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
// distribution.
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///////////////////////////////////////////////////////////////////////////
#ifndef INCLUDED_IMF_TILED_OUTPUT_FILE_H
#define INCLUDED_IMF_TILED_OUTPUT_FILE_H
//-----------------------------------------------------------------------------
//
// class TiledOutputFile
//
//-----------------------------------------------------------------------------
#include <ImfHeader.h>
#include <ImfFrameBuffer.h>
#include "ImathBox.h"
#include <ImfTileDescription.h>
#include <ImfThreading.h>
namespace Imf {
class TiledInputFile;
class InputFile;
struct PreviewRgba;
class TiledOutputFile
{
public:
//-------------------------------------------------------------------
// A constructor that opens the file with the specified name, and
// writes the file header. The file header is also copied into the
// TiledOutputFile object, and can later be accessed via the header()
// method.
//
// Destroying TiledOutputFile constructed with this constructor
// automatically closes the corresponding files.
//
// The header must contain a TileDescriptionAttribute called "tiles".
//
// The x and y subsampling factors for all image channels must be 1;
// subsampling is not supported.
//
// Tiles can be written to the file in arbitrary order. The line
// order attribute can be used to cause the tiles to be sorted in
// the file. When the file is read later, reading the tiles in the
// same order as they are in the file tends to be significantly
// faster than reading the tiles in random order (see writeTile,
// below).
//-------------------------------------------------------------------
TiledOutputFile (const char fileName[],
const Header &header,
int numThreads = globalThreadCount ());
// ----------------------------------------------------------------
// A constructor that attaches the new TiledOutputFile object to
// a file that has already been opened. Destroying TiledOutputFile
// objects constructed with this constructor does not automatically
// close the corresponding files.
// ----------------------------------------------------------------
TiledOutputFile (OStream &os,
const Header &header,
int numThreads = globalThreadCount ());
//-----------------------------------------------------
// Destructor
//
// Destroying a TiledOutputFile object before all tiles
// have been written results in an incomplete file.
//-----------------------------------------------------
virtual ~TiledOutputFile ();
//------------------------
// Access to the file name
//------------------------
const char * fileName () const;
//--------------------------
// Access to the file header
//--------------------------
const Header & header () const;
//-------------------------------------------------------
// Set the current frame buffer -- copies the FrameBuffer
// object into the TiledOutputFile object.
//
// The current frame buffer is the source of the pixel
// data written to the file. The current frame buffer
// must be set at least once before writeTile() is
// called. The current frame buffer can be changed
// after each call to writeTile().
//-------------------------------------------------------
void setFrameBuffer (const FrameBuffer &frameBuffer);
//-----------------------------------
// Access to the current frame buffer
//-----------------------------------
const FrameBuffer & frameBuffer () const;
//-------------------
// Utility functions:
//-------------------
//---------------------------------------------------------
// Multiresolution mode and tile size:
// The following functions return the xSize, ySize and mode
// fields of the file header's TileDescriptionAttribute.
//---------------------------------------------------------
unsigned int tileXSize () const;
unsigned int tileYSize () const;
LevelMode levelMode () const;
LevelRoundingMode levelRoundingMode () const;
//--------------------------------------------------------------------
// Number of levels:
//
// numXLevels() returns the file's number of levels in x direction.
//
// if levelMode() == ONE_LEVEL:
// return value is: 1
//
// if levelMode() == MIPMAP_LEVELS:
// return value is: rfunc (log (max (w, h)) / log (2)) + 1
//
// if levelMode() == RIPMAP_LEVELS:
// return value is: rfunc (log (w) / log (2)) + 1
//
// where
// w is the width of the image's data window, max.x - min.x + 1,
// y is the height of the image's data window, max.y - min.y + 1,
// and rfunc(x) is either floor(x), or ceil(x), depending on
// whether levelRoundingMode() returns ROUND_DOWN or ROUND_UP.
//
// numYLevels() returns the file's number of levels in y direction.
//
// if levelMode() == ONE_LEVEL or levelMode() == MIPMAP_LEVELS:
// return value is the same as for numXLevels()
//
// if levelMode() == RIPMAP_LEVELS:
// return value is: rfunc (log (h) / log (2)) + 1
//
//
// numLevels() is a convenience function for use with MIPMAP_LEVELS
// files.
//
// if levelMode() == ONE_LEVEL or levelMode() == MIPMAP_LEVELS:
// return value is the same as for numXLevels()
//
// if levelMode() == RIPMAP_LEVELS:
// an Iex::LogicExc exception is thrown
//
// isValidLevel(lx, ly) returns true if the file contains
// a level with level number (lx, ly), false if not.
//
//--------------------------------------------------------------------
int numLevels () const;
int numXLevels () const;
int numYLevels () const;
bool isValidLevel (int lx, int ly) const;
//---------------------------------------------------------
// Dimensions of a level:
//
// levelWidth(lx) returns the width of a level with level
// number (lx, *), where * is any number.
//
// return value is:
// max (1, rfunc (w / pow (2, lx)))
//
//
// levelHeight(ly) returns the height of a level with level
// number (*, ly), where * is any number.
//
// return value is:
// max (1, rfunc (h / pow (2, ly)))
//
//---------------------------------------------------------
int levelWidth (int lx) const;
int levelHeight (int ly) const;
//----------------------------------------------------------
// Number of tiles:
//
// numXTiles(lx) returns the number of tiles in x direction
// that cover a level with level number (lx, *), where * is
// any number.
//
// return value is:
// (levelWidth(lx) + tileXSize() - 1) / tileXSize()
//
//
// numYTiles(ly) returns the number of tiles in y direction
// that cover a level with level number (*, ly), where * is
// any number.
//
// return value is:
// (levelHeight(ly) + tileXSize() - 1) / tileXSize()
//
//----------------------------------------------------------
int numXTiles (int lx = 0) const;
int numYTiles (int ly = 0) const;
//---------------------------------------------------------
// Level pixel ranges:
//
// dataWindowForLevel(lx, ly) returns a 2-dimensional
// region of valid pixel coordinates for a level with
// level number (lx, ly)
//
// return value is a Box2i with min value:
// (dataWindow.min.x, dataWindow.min.y)
//
// and max value:
// (dataWindow.min.x + levelWidth(lx) - 1,
// dataWindow.min.y + levelHeight(ly) - 1)
//
// dataWindowForLevel(level) is a convenience function used
// for ONE_LEVEL and MIPMAP_LEVELS files. It returns
// dataWindowForLevel(level, level).
//
//---------------------------------------------------------
Imath::Box2i dataWindowForLevel (int l = 0) const;
Imath::Box2i dataWindowForLevel (int lx, int ly) const;
//-------------------------------------------------------------------
// Tile pixel ranges:
//
// dataWindowForTile(dx, dy, lx, ly) returns a 2-dimensional
// region of valid pixel coordinates for a tile with tile coordinates
// (dx,dy) and level number (lx, ly).
//
// return value is a Box2i with min value:
// (dataWindow.min.x + dx * tileXSize(),
// dataWindow.min.y + dy * tileYSize())
//
// and max value:
// (dataWindow.min.x + (dx + 1) * tileXSize() - 1,
// dataWindow.min.y + (dy + 1) * tileYSize() - 1)
//
// dataWindowForTile(dx, dy, level) is a convenience function
// used for ONE_LEVEL and MIPMAP_LEVELS files. It returns
// dataWindowForTile(dx, dy, level, level).
//
//-------------------------------------------------------------------
Imath::Box2i dataWindowForTile (int dx, int dy,
int l = 0) const;
Imath::Box2i dataWindowForTile (int dx, int dy,
int lx, int ly) const;
//------------------------------------------------------------------
// Write pixel data:
//
// writeTile(dx, dy, lx, ly) writes the tile with tile
// coordinates (dx, dy), and level number (lx, ly) to
// the file.
//
// dx must lie in the interval [0, numXTiles(lx) - 1]
// dy must lie in the interval [0, numYTiles(ly) - 1]
//
// lx must lie in the interval [0, numXLevels() - 1]
// ly must lie in the inverval [0, numYLevels() - 1]
//
// writeTile(dx, dy, level) is a convenience function
// used for ONE_LEVEL and MIPMAP_LEVEL files. It calls
// writeTile(dx, dy, level, level).
//
// The two writeTiles(dx1, dx2, dy1, dy2, ...) functions allow
// writing multiple tiles at once. If multi-threading is used
// multiple tiles are written concurrently. The tile coordinates,
// dx1, dx2 and dy1, dy2, specify inclusive ranges of tile
// coordinates. It is valid for dx1 < dx2 or dy1 < dy2; the
// tiles are always written in the order specified by the line
// order attribute. Hence, it is not possible to specify an
// "invalid" or empty tile range.
//
// Pixels that are outside the pixel coordinate range for the tile's
// level, are never accessed by writeTile().
//
// Each tile in the file must be written exactly once.
//
// The file's line order attribute determines the order of the tiles
// in the file:
//
// INCREASING_Y In the file, the tiles for each level are stored
// in a contiguous block. The levels are ordered
// like this:
//
// (0, 0) (1, 0) ... (nx-1, 0)
// (0, 1) (1, 1) ... (nx-1, 1)
// ...
// (0,ny-1) (1,ny-1) ... (nx-1,ny-1)
//
// where nx = numXLevels(), and ny = numYLevels().
// In an individual level, (lx, ly), the tiles
// are stored in the following order:
//
// (0, 0) (1, 0) ... (tx-1, 0)
// (0, 1) (1, 1) ... (tx-1, 1)
// ...
// (0,ty-1) (1,ty-1) ... (tx-1,ty-1)
//
// where tx = numXTiles(lx),
// and ty = numYTiles(ly).
//
// DECREASING_Y As for INCREASING_Y, the tiles for each level
// are stored in a contiguous block. The levels
// are ordered the same way as for INCREASING_Y,
// but within an individual level, the tiles
// are stored in this order:
//
// (0,ty-1) (1,ty-1) ... (tx-1,ty-1)
// ...
// (0, 1) (1, 1) ... (tx-1, 1)
// (0, 0) (1, 0) ... (tx-1, 0)
//
//
// RANDOM_Y The order of the calls to writeTile() determines
// the order of the tiles in the file.
//
//------------------------------------------------------------------
void writeTile (int dx, int dy, int l = 0);
void writeTile (int dx, int dy, int lx, int ly);
void writeTiles (int dx1, int dx2, int dy1, int dy2,
int lx, int ly);
void writeTiles (int dx1, int dx2, int dy1, int dy2,
int l = 0);
//------------------------------------------------------------------
// Shortcut to copy all pixels from a TiledInputFile into this file,
// without uncompressing and then recompressing the pixel data.
// This file's header must be compatible with the TiledInputFile's
// header: The two header's "dataWindow", "compression",
// "lineOrder", "channels", and "tiles" attributes must be the same.
//------------------------------------------------------------------
void copyPixels (TiledInputFile &in);
//------------------------------------------------------------------
// Shortcut to copy all pixels from an InputFile into this file,
// without uncompressing and then recompressing the pixel data.
// This file's header must be compatible with the InputFile's
// header: The two header's "dataWindow", "compression",
// "lineOrder", "channels", and "tiles" attributes must be the same.
//
// To use this function, the InputFile must be tiled.
//------------------------------------------------------------------
void copyPixels (InputFile &in);
//--------------------------------------------------------------
// Updating the preview image:
//
// updatePreviewImage() supplies a new set of pixels for the
// preview image attribute in the file's header. If the header
// does not contain a preview image, updatePreviewImage() throws
// an Iex::LogicExc.
//
// Note: updatePreviewImage() is necessary because images are
// often stored in a file incrementally, a few tiles at a time,
// while the image is being generated. Since the preview image
// is an attribute in the file's header, it gets stored in the
// file as soon as the file is opened, but we may not know what
// the preview image should look like until we have written the
// last tile of the main image.
//
//--------------------------------------------------------------
void updatePreviewImage (const PreviewRgba newPixels[]);
//-------------------------------------------------------------
// Break a tile -- for testing and debugging only:
//
// breakTile(dx,dy,lx,ly,p,n,c) introduces an error into the
// output file by writing n copies of character c, starting
// p bytes from the beginning of the tile with tile coordinates
// (dx, dy) and level number (lx, ly).
//
// Warning: Calling this function usually results in a broken
// image file. The file or parts of it may not be readable,
// or the file may contain bad data.
//
//-------------------------------------------------------------
void breakTile (int dx, int dy,
int lx, int ly,
int offset,
int length,
char c);
struct Data;
private:
TiledOutputFile (const TiledOutputFile &); // not implemented
TiledOutputFile & operator = (const TiledOutputFile &); // not implemented
void initialize (const Header &header);
bool isValidTile (int dx, int dy,
int lx, int ly) const;
size_t bytesPerLineForTile (int dx, int dy,
int lx, int ly) const;
Data * _data;
};
} // namespace Imf
#endif