--- /dev/null
+///////////////////////////////////////////////////////////////////////////
+//
+// 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:
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Industrial Light & Magic nor the names of
+// its contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef INCLUDED_IMF_RGBA_FILE_H
+#define INCLUDED_IMF_RGBA_FILE_H
+
+
+//-----------------------------------------------------------------------------
+//
+// Simplified RGBA image I/O
+//
+// class RgbaOutputFile
+// class RgbaInputFile
+//
+//-----------------------------------------------------------------------------
+
+#include <ImfHeader.h>
+#include <ImfFrameBuffer.h>
+#include <ImfRgba.h>
+#include "ImathVec.h"
+#include "ImathBox.h"
+#include "half.h"
+#include <ImfThreading.h>
+
+namespace Imf {
+
+
+class OutputFile;
+class InputFile;
+struct PreviewRgba;
+
+//
+// RGBA output file.
+//
+
+class RgbaOutputFile
+{
+ public:
+
+ //---------------------------------------------------
+ // Constructor -- header is constructed by the caller
+ //---------------------------------------------------
+
+ RgbaOutputFile (const char name[],
+ const Header &header,
+ RgbaChannels rgbaChannels = WRITE_RGBA,
+ int numThreads = globalThreadCount());
+
+
+ //----------------------------------------------------
+ // Constructor -- header is constructed by the caller,
+ // file is opened by the caller, destructor will not
+ // automatically close the file.
+ //----------------------------------------------------
+
+ RgbaOutputFile (OStream &os,
+ const Header &header,
+ RgbaChannels rgbaChannels = WRITE_RGBA,
+ int numThreads = globalThreadCount());
+
+
+ //----------------------------------------------------------------
+ // Constructor -- header data are explicitly specified as function
+ // call arguments (empty dataWindow means "same as displayWindow")
+ //----------------------------------------------------------------
+
+ RgbaOutputFile (const char name[],
+ const Imath::Box2i &displayWindow,
+ const Imath::Box2i &dataWindow = Imath::Box2i(),
+ RgbaChannels rgbaChannels = WRITE_RGBA,
+ float pixelAspectRatio = 1,
+ const Imath::V2f screenWindowCenter = Imath::V2f (0, 0),
+ float screenWindowWidth = 1,
+ LineOrder lineOrder = INCREASING_Y,
+ Compression compression = PIZ_COMPRESSION,
+ int numThreads = globalThreadCount());
+
+
+ //-----------------------------------------------
+ // Constructor -- like the previous one, but both
+ // the display window and the data window are
+ // Box2i (V2i (0, 0), V2i (width - 1, height -1))
+ //-----------------------------------------------
+
+ RgbaOutputFile (const char name[],
+ int width,
+ int height,
+ RgbaChannels rgbaChannels = WRITE_RGBA,
+ float pixelAspectRatio = 1,
+ const Imath::V2f screenWindowCenter = Imath::V2f (0, 0),
+ float screenWindowWidth = 1,
+ LineOrder lineOrder = INCREASING_Y,
+ Compression compression = PIZ_COMPRESSION,
+ int numThreads = globalThreadCount());
+
+
+ //-----------
+ // Destructor
+ //-----------
+
+ virtual ~RgbaOutputFile ();
+
+
+ //------------------------------------------------
+ // Define a frame buffer as the pixel data source:
+ // Pixel (x, y) is at address
+ //
+ // base + x * xStride + y * yStride
+ //
+ //------------------------------------------------
+
+ void setFrameBuffer (const Rgba *base,
+ size_t xStride,
+ size_t yStride);
+
+
+ //---------------------------------------------
+ // Write pixel data (see class Imf::OutputFile)
+ //---------------------------------------------
+
+ void writePixels (int numScanLines = 1);
+ int currentScanLine () const;
+
+
+ //--------------------------
+ // Access to the file header
+ //--------------------------
+
+ const Header & header () const;
+ const FrameBuffer & frameBuffer () const;
+ const Imath::Box2i & displayWindow () const;
+ const Imath::Box2i & dataWindow () const;
+ float pixelAspectRatio () const;
+ const Imath::V2f screenWindowCenter () const;
+ float screenWindowWidth () const;
+ LineOrder lineOrder () const;
+ Compression compression () const;
+ RgbaChannels channels () const;
+
+
+ // --------------------------------------------------------------------
+ // Update the preview image (see Imf::OutputFile::updatePreviewImage())
+ // --------------------------------------------------------------------
+
+ void updatePreviewImage (const PreviewRgba[]);
+
+
+ //-----------------------------------------------------------------------
+ // Rounding control for luminance/chroma images:
+ //
+ // If the output file contains luminance and chroma channels (WRITE_YC
+ // or WRITE_YCA), then the the significands of the luminance and
+ // chroma values are rounded to roundY and roundC bits respectively (see
+ // function half::round()). Rounding improves compression with minimal
+ // image degradation, usually much less than the degradation caused by
+ // chroma subsampling. By default, roundY is 7, and roundC is 5.
+ //
+ // If the output file contains RGB channels or a luminance channel,
+ // without chroma, then no rounding is performed.
+ //-----------------------------------------------------------------------
+
+ void setYCRounding (unsigned int roundY,
+ unsigned int roundC);
+
+
+ //----------------------------------------------------
+ // Break a scan line -- for testing and debugging only
+ // (see Imf::OutputFile::updatePreviewImage()
+ //
+ // 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 breakScanLine (int y,
+ int offset,
+ int length,
+ char c);
+ private:
+
+ RgbaOutputFile (const RgbaOutputFile &); // not implemented
+ RgbaOutputFile & operator = (const RgbaOutputFile &); // not implemented
+
+ class ToYca;
+
+ OutputFile * _outputFile;
+ ToYca * _toYca;
+};
+
+
+//
+// RGBA input file
+//
+
+class RgbaInputFile
+{
+ public:
+
+ //-------------------------------------------------------
+ // Constructor -- opens the file with the specified name,
+ // destructor will automatically close the file.
+ //-------------------------------------------------------
+
+ RgbaInputFile (const char name[], int numThreads = globalThreadCount());
+
+
+ //-----------------------------------------------------------
+ // Constructor -- attaches the new RgbaInputFile object to a
+ // file that has already been opened by the caller.
+ // Destroying the RgbaInputFile object will not automatically
+ // close the file.
+ //-----------------------------------------------------------
+
+ RgbaInputFile (IStream &is, int numThreads = globalThreadCount());
+
+
+ //-----------
+ // Destructor
+ //-----------
+
+ virtual ~RgbaInputFile ();
+
+ //-----------------------------------------------------
+ // Define a frame buffer as the pixel data destination:
+ // Pixel (x, y) is at address
+ //
+ // base + x * xStride + y * yStride
+ //
+ //-----------------------------------------------------
+
+ void setFrameBuffer (Rgba *base,
+ size_t xStride,
+ size_t yStride);
+
+
+ //-------------------------------------------
+ // Read pixel data (see class Imf::InputFile)
+ //-------------------------------------------
+
+ void readPixels (int scanLine1, int scanLine2);
+ void readPixels (int scanLine);
+
+
+ //--------------------------
+ // Access to the file header
+ //--------------------------
+
+ const Header & header () const;
+ const FrameBuffer & frameBuffer () const;
+ const Imath::Box2i & displayWindow () const;
+ const Imath::Box2i & dataWindow () const;
+ float pixelAspectRatio () const;
+ const Imath::V2f screenWindowCenter () const;
+ float screenWindowWidth () const;
+ LineOrder lineOrder () const;
+ Compression compression () const;
+ RgbaChannels channels () const;
+ const char * fileName () const;
+ bool isComplete () const;
+
+ //----------------------------------
+ // Access to the file format version
+ //----------------------------------
+
+ int version () const;
+
+ private:
+
+ RgbaInputFile (const RgbaInputFile &); // not implemented
+ RgbaInputFile & operator = (const RgbaInputFile &); // not implemented
+
+ class FromYca;
+
+ InputFile * _inputFile;
+ FromYca * _fromYca;
+};
+
+
+} // namespace Imf
+
+#endif
projects / opencv / blobdiff