AdvaImg plugin folder renaming

git-svn-id: http://svn.miranda-ng.org/main/trunk@2801 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 764 insertions, 0 deletions

diff --git a/plugins/AdvaImg/src/FreeImage/PluginEXR.cpp b/plugins/AdvaImg/src/FreeImage/PluginEXR.cpp
new file mode 100644
index 0000000000..b9963a11b2
--- /dev/null
+++ b/plugins/AdvaImg/src/FreeImage/PluginEXR.cpp
@@ -0,0 +1,764 @@
+// ==========================================================
+// EXR Loader and writer
+//
+// Design and implementation by 
+// - Hervé Drolon (drolon@infonie.fr)
+// - Mihail Naydenov (mnaydenov@users.sourceforge.net)
+//
+// This file is part of FreeImage 3
+//
+// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
+// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
+// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
+// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
+// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
+// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
+// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
+// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+// THIS DISCLAIMER.
+//
+// Use at your own risk!
+// ==========================================================
+
+#include "FreeImage.h"
+#include "Utilities.h"
+#include "../OpenEXR/IlmImf/ImfIO.h"
+#include "../OpenEXR/Iex/Iex.h"
+#include "../OpenEXR/IlmImf/ImfOutputFile.h"
+#include "../OpenEXR/IlmImf/ImfInputFile.h"
+#include "../OpenEXR/IlmImf/ImfRgbaFile.h"
+#include "../OpenEXR/IlmImf/ImfChannelList.h"
+#include "../OpenEXR/IlmImf/ImfRgba.h"
+#include "../OpenEXR/IlmImf/ImfArray.h"
+#include "../OpenEXR/IlmImf/ImfPreviewImage.h"
+#include "../OpenEXR/Half/half.h"
+
+
+// ==========================================================
+// Plugin Interface
+// ==========================================================
+
+static int s_format_id;
+
+// ----------------------------------------------------------
+
+/**
+FreeImage input stream wrapper
+*/
+class C_IStream: public Imf::IStream {
+public:
+	C_IStream (FreeImageIO *io, fi_handle handle):
+	IStream(""), _io (io), _handle(handle) {}
+
+	virtual bool	read (char c[/*n*/], int n);
+	virtual Imf::Int64	tellg ();
+	virtual void	seekg (Imf::Int64 pos);
+	virtual void	clear () {};
+
+private:
+    FreeImageIO *_io;
+	fi_handle _handle;
+};
+
+
+/**
+FreeImage output stream wrapper
+*/
+class C_OStream: public Imf::OStream {
+public:
+	C_OStream (FreeImageIO *io, fi_handle handle):
+	OStream(""), _io (io), _handle(handle) {}
+
+    virtual void	write (const char c[/*n*/], int n);
+	virtual Imf::Int64	tellp ();
+	virtual void	seekp (Imf::Int64 pos);
+
+private:
+    FreeImageIO *_io;
+	fi_handle _handle;
+};
+
+
+bool
+C_IStream::read (char c[/*n*/], int n) {
+	return ((unsigned)n != _io->read_proc(c, 1, n, _handle));
+}
+
+Imf::Int64
+C_IStream::tellg () {
+	return _io->tell_proc(_handle);
+}
+
+void
+C_IStream::seekg (Imf::Int64 pos) {
+	_io->seek_proc(_handle, (unsigned)pos, SEEK_SET);
+}
+
+void
+C_OStream::write (const char c[/*n*/], int n) {
+	if ((unsigned)n != _io->write_proc((void*)&c[0], 1, n, _handle)) {
+		Iex::throwErrnoExc();
+	}
+}
+
+Imf::Int64
+C_OStream::tellp () {
+	return _io->tell_proc(_handle);
+}
+
+void
+C_OStream::seekp (Imf::Int64 pos) {
+	_io->seek_proc(_handle, (unsigned)pos, SEEK_SET);
+}
+
+// ----------------------------------------------------------
+
+
+// ==========================================================
+// Plugin Implementation
+// ==========================================================
+
+static const char * DLL_CALLCONV
+Format() {
+	return "EXR";
+}
+
+static const char * DLL_CALLCONV
+Description() {
+	return "ILM OpenEXR";
+}
+
+static const char * DLL_CALLCONV
+Extension() {
+	return "exr";
+}
+
+static const char * DLL_CALLCONV
+RegExpr() {
+	return NULL;
+}
+
+static const char * DLL_CALLCONV
+MimeType() {
+	return "image/x-exr";
+}
+
+static BOOL DLL_CALLCONV
+Validate(FreeImageIO *io, fi_handle handle) {
+	BYTE exr_signature[] = { 0x76, 0x2F, 0x31, 0x01 };
+	BYTE signature[] = { 0, 0, 0, 0 };
+
+	io->read_proc(signature, 1, 4, handle);
+	return (memcmp(exr_signature, signature, 4) == 0);
+}
+
+static BOOL DLL_CALLCONV
+SupportsExportDepth(int depth) {
+	return FALSE;
+}
+
+static BOOL DLL_CALLCONV 
+SupportsExportType(FREE_IMAGE_TYPE type) {
+	return (
+		(type == FIT_FLOAT) ||
+		(type == FIT_RGBF)  ||
+		(type == FIT_RGBAF)
+	);
+}
+
+static BOOL DLL_CALLCONV
+SupportsNoPixels() {
+	return TRUE;
+}
+
+// --------------------------------------------------------------------------
+
+static FIBITMAP * DLL_CALLCONV
+Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
+	bool bUseRgbaInterface = false;
+	FIBITMAP *dib = NULL;	
+
+	if (!handle) {
+		return NULL;
+	}
+
+	try {
+		BOOL header_only = (flags & FIF_LOAD_NOPIXELS) == FIF_LOAD_NOPIXELS;
+
+		// save the stream starting point
+		const long stream_start = io->tell_proc(handle);
+
+		// wrap the FreeImage IO stream
+		C_IStream istream(io, handle);
+
+		// open the file
+		Imf::InputFile file(istream);
+
+		// get file info			
+		const Imath::Box2i &dataWindow = file.header().dataWindow();
+		int width  = dataWindow.max.x - dataWindow.min.x + 1;
+		int height = dataWindow.max.y - dataWindow.min.y + 1;
+
+		//const Imf::Compression &compression = file.header().compression();
+
+		const Imf::ChannelList &channels = file.header().channels();
+
+		// check the number of components and check for a coherent format
+
+		std::string exr_color_model;
+		Imf::PixelType pixel_type = Imf::HALF;
+		FREE_IMAGE_TYPE image_type = FIT_UNKNOWN;
+		int components = 0;
+		bool bMixedComponents = false;
+
+		for (Imf::ChannelList::ConstIterator i = channels.begin(); i != channels.end(); ++i) {
+			components++;
+			if(components == 1) {
+				exr_color_model += i.name();
+				pixel_type = i.channel().type;
+			} else {
+				exr_color_model += "/";
+				exr_color_model += i.name();
+				if (i.channel().type != pixel_type) {
+					bMixedComponents = true;
+				}
+			}
+		}
+
+		if(bMixedComponents) {
+			bool bHandled = false;
+			// we may have a RGBZ or RGBAZ image ... 
+			if(components > 4) {
+				if(channels.findChannel("R") && channels.findChannel("G") && channels.findChannel("B") && channels.findChannel("A")) {
+					std::string msg = "Warning: converting color model " + exr_color_model + " to RGBA color model";
+					FreeImage_OutputMessageProc(s_format_id, msg.c_str());
+					bHandled = true;
+				}
+			}
+			else if(components > 3) {
+				if(channels.findChannel("R") && channels.findChannel("G") && channels.findChannel("B")) {
+					std::string msg = "Warning: converting color model " + exr_color_model + " to RGB color model";
+					FreeImage_OutputMessageProc(s_format_id, msg.c_str());
+					bHandled = true;
+				}
+			}
+			if (!bHandled) {
+				THROW (Iex::InputExc, "Unable to handle mixed component types (color model = " << exr_color_model << ")");
+			} 
+		}
+
+		switch(pixel_type) {
+			case Imf::UINT:
+				THROW (Iex::InputExc, "Unsupported format: UINT");
+				break;
+			case Imf::HALF:
+			case Imf::FLOAT:
+			default:
+				break;
+		}
+
+		// check for supported image color models
+		// --------------------------------------------------------------
+
+		if ((components == 1) || (components == 2)) {				
+			// if the image is gray-alpha (YA), ignore the alpha channel
+			if ((components == 1) && channels.findChannel("Y")) {
+				image_type = FIT_FLOAT;
+				components = 1;
+			} else {
+				std::string msg = "Warning: loading color model " + exr_color_model + " as Y color model";
+				FreeImage_OutputMessageProc(s_format_id, msg.c_str());
+				image_type = FIT_FLOAT;
+				// ignore the other channel
+				components = 1;
+			}
+		} else if(components == 3) {
+			if(channels.findChannel("R") && channels.findChannel("G") && channels.findChannel("B")) {
+				image_type = FIT_RGBF;
+			}
+			else if(channels.findChannel("BY") && channels.findChannel("RY") && channels.findChannel("Y")) {
+				image_type = FIT_RGBF;
+				bUseRgbaInterface = true;
+			}
+		} else if(components >= 4) {
+			if(channels.findChannel("R") && channels.findChannel("G") && channels.findChannel("B")) {
+				if(channels.findChannel("A")) {
+					if(components > 4) {
+						std::string msg = "Warning: converting color model " + exr_color_model + " to RGBA color model";
+						FreeImage_OutputMessageProc(s_format_id, msg.c_str());
+					}
+					image_type = FIT_RGBAF;
+					// ignore other layers if there is more than one alpha layer
+					components = 4;
+				} else {
+					std::string msg = "Warning: converting color model " + exr_color_model + " to RGB color model";
+					FreeImage_OutputMessageProc(s_format_id, msg.c_str());
+
+					image_type = FIT_RGBF;
+					// ignore other channels
+					components = 3;					
+				}
+			}
+		}
+
+		if(image_type == FIT_UNKNOWN) {
+			THROW (Iex::InputExc, "Unsupported color model: " << exr_color_model);
+		}
+
+		// allocate a new dib
+		dib = FreeImage_AllocateHeaderT(header_only, image_type, width, height, 0);
+		if (!dib) THROW (Iex::NullExc, FI_MSG_ERROR_MEMORY);
+
+		// try to load the preview image
+		// --------------------------------------------------------------
+
+		if(file.header().hasPreviewImage()) {
+			const Imf::PreviewImage& preview = file.header().previewImage();
+			const unsigned thWidth = preview.width();
+			const unsigned thHeight = preview.height();
+			
+			FIBITMAP* thumbnail = FreeImage_Allocate(thWidth, thHeight, 32);
+			if(thumbnail) {
+				const Imf::PreviewRgba *src_line = preview.pixels();
+				BYTE *dst_line = FreeImage_GetScanLine(thumbnail, thHeight - 1);
+				const unsigned dstPitch = FreeImage_GetPitch(thumbnail);
+				
+				for (unsigned y = 0; y < thHeight; ++y) {
+					const Imf::PreviewRgba *src_pixel = src_line;
+					RGBQUAD* dst_pixel = (RGBQUAD*)dst_line;
+					
+					for(unsigned x = 0; x < thWidth; ++x) {
+						dst_pixel->rgbRed = src_pixel->r;
+						dst_pixel->rgbGreen = src_pixel->g;
+						dst_pixel->rgbBlue = src_pixel->b;
+						dst_pixel->rgbReserved = src_pixel->a;				
+						src_pixel++;
+						dst_pixel++;
+					}
+					src_line += thWidth;
+					dst_line -= dstPitch;
+				}
+				FreeImage_SetThumbnail(dib, thumbnail);
+				FreeImage_Unload(thumbnail);
+			}
+		}
+
+		if(header_only) {
+			// header only mode
+			return dib;
+		}
+
+		// load pixels
+		// --------------------------------------------------------------
+
+		const BYTE *bits = FreeImage_GetBits(dib);			// pointer to our pixel buffer
+		const size_t bytespp = sizeof(float) * components;	// size of our pixel in bytes
+		const unsigned pitch = FreeImage_GetPitch(dib);		// size of our yStride in bytes
+
+		Imf::PixelType pixelType = Imf::FLOAT;	// load as float data type;
+		
+		if(bUseRgbaInterface) {
+			// use the RGBA interface (used when loading RY BY Y images )
+
+			const int chunk_size = 16;
+
+			BYTE *scanline = (BYTE*)bits;
+
+			// re-open using the RGBA interface
+			io->seek_proc(handle, stream_start, SEEK_SET);
+			Imf::RgbaInputFile rgbaFile(istream);
+
+			// read the file in chunks
+			Imath::Box2i dw = dataWindow;
+			Imf::Array2D<Imf::Rgba> chunk(chunk_size, width);
+			while (dw.min.y <= dw.max.y) {
+				// read a chunk
+				rgbaFile.setFrameBuffer (&chunk[0][0] - dw.min.x - dw.min.y * width, 1, width);
+				rgbaFile.readPixels (dw.min.y, MIN(dw.min.y + chunk_size - 1, dw.max.y));
+				// fill the dib
+				const int y_max = ((dw.max.y - dw.min.y) <= chunk_size) ? (dw.max.y - dw.min.y) : chunk_size;
+				for(int y = 0; y < y_max; y++) {
+					FIRGBF *pixel = (FIRGBF*)scanline;
+					const Imf::Rgba *half_rgba = chunk[y];
+					for(int x = 0; x < width; x++) {
+						// convert from half to float
+						pixel[x].red = half_rgba[x].r;
+						pixel[x].green = half_rgba[x].g;
+						pixel[x].blue = half_rgba[x].b;
+					}
+					// next line
+					scanline += pitch;
+				}
+				// next chunk
+				dw.min.y += chunk_size;
+			}
+
+		} else {
+			// use the low level interface
+
+			// build a frame buffer (i.e. what we want on output)
+			Imf::FrameBuffer frameBuffer;
+
+			// allow dataWindow with minimal bounds different form zero
+			size_t offset = - dataWindow.min.x * bytespp - dataWindow.min.y * pitch;
+
+			if(components == 1) {
+				frameBuffer.insert ("Y",	// name
+					Imf::Slice (pixelType,	// type
+					(char*)(bits + offset), // base
+					bytespp,				// xStride
+					pitch,					// yStride
+					1, 1,					// x/y sampling
+					0.0));					// fillValue
+			} else if ((components == 3) || (components == 4)) {
+				const char *channel_name[4] = { "R", "G", "B", "A" };
+
+				for(int c = 0; c < components; c++) {
+					frameBuffer.insert (
+						channel_name[c],					// name
+						Imf::Slice (pixelType,				// type
+						(char*)(bits + c * sizeof(float) + offset), // base
+						bytespp,							// xStride
+						pitch,								// yStride
+						1, 1,								// x/y sampling
+						0.0));								// fillValue
+				}
+			}
+
+			// read the file
+			file.setFrameBuffer(frameBuffer);
+			file.readPixels(dataWindow.min.y, dataWindow.max.y);
+		}
+
+		// lastly, flip dib lines
+		FreeImage_FlipVertical(dib);
+
+	}
+	catch(Iex::BaseExc & e) {
+		if(dib != NULL) {
+			FreeImage_Unload(dib);
+		}
+		FreeImage_OutputMessageProc(s_format_id, e.what());
+		return NULL;
+	}
+
+	return dib;
+}
+
+/**
+Set the preview image using the dib embedded thumbnail
+*/
+static BOOL
+SetPreviewImage(FIBITMAP *dib, Imf::Header& header) {
+	if (!FreeImage_GetThumbnail(dib)) {
+		return FALSE;
+	}
+	FIBITMAP* thumbnail = FreeImage_GetThumbnail(dib);
+
+	if ((FreeImage_GetImageType(thumbnail) != FIT_BITMAP) || (FreeImage_GetBPP(thumbnail) != 32)) {
+		// invalid thumbnail - ignore it
+		FreeImage_OutputMessageProc(s_format_id, FI_MSG_WARNING_INVALID_THUMBNAIL);
+	} else {
+		const unsigned thWidth = FreeImage_GetWidth(thumbnail);
+		const unsigned thHeight = FreeImage_GetHeight(thumbnail);
+		
+		Imf::PreviewImage preview(thWidth, thHeight);
+
+		// copy thumbnail to 32-bit RGBA preview image
+		
+		const BYTE* src_line = FreeImage_GetScanLine(thumbnail, thHeight - 1);
+		Imf::PreviewRgba* dst_line = preview.pixels();
+		const unsigned srcPitch = FreeImage_GetPitch(thumbnail);
+		
+		for (unsigned y = 0; y < thHeight; y++) {
+			const RGBQUAD* src_pixel = (RGBQUAD*)src_line;
+			Imf::PreviewRgba* dst_pixel = dst_line;
+			
+			for(unsigned x = 0; x < thWidth; x++) {
+				dst_pixel->r = src_pixel->rgbRed;
+				dst_pixel->g = src_pixel->rgbGreen;
+				dst_pixel->b = src_pixel->rgbBlue;
+				dst_pixel->a = src_pixel->rgbReserved;
+				
+				src_pixel++;
+				dst_pixel++;
+			}
+			
+			src_line -= srcPitch;
+			dst_line += thWidth;
+		}
+		
+		header.setPreviewImage(preview);
+	}
+
+	return TRUE;
+}
+
+/**
+Save using EXR_LC compression (works only with RGB[A]F images)
+*/
+static BOOL 
+SaveAsEXR_LC(C_OStream& ostream, FIBITMAP *dib, Imf::Header& header, int width, int height) {
+	int x, y;
+	Imf::RgbaChannels rgbaChannels;
+
+	try {
+
+		FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
+
+		// convert from float to half
+		Imf::Array2D<Imf::Rgba> pixels(height, width);
+		switch(image_type) {
+			case FIT_RGBF:
+				rgbaChannels = Imf::WRITE_YC;
+				for(y = 0; y < height; y++) {
+					FIRGBF *src_bits = (FIRGBF*)FreeImage_GetScanLine(dib, height - 1 - y);
+					for(x = 0; x < width; x++) {
+						Imf::Rgba &dst_bits = pixels[y][x];
+						dst_bits.r = src_bits[x].red;
+						dst_bits.g = src_bits[x].green;
+						dst_bits.b = src_bits[x].blue;
+					}
+				}
+				break;
+			case FIT_RGBAF:
+				rgbaChannels = Imf::WRITE_YCA;
+				for(y = 0; y < height; y++) {
+					FIRGBAF *src_bits = (FIRGBAF*)FreeImage_GetScanLine(dib, height - 1 - y);
+					for(x = 0; x < width; x++) {
+						Imf::Rgba &dst_bits = pixels[y][x];
+						dst_bits.r = src_bits[x].red;
+						dst_bits.g = src_bits[x].green;
+						dst_bits.b = src_bits[x].blue;
+						dst_bits.a = src_bits[x].alpha;
+					}
+				}
+				break;
+			default:
+				THROW (Iex::IoExc, "Bad image type");
+				break;
+		}
+
+		// write the data
+		Imf::RgbaOutputFile file(ostream, header, rgbaChannels);
+		file.setFrameBuffer (&pixels[0][0], 1, width);
+		file.writePixels (height);
+
+		return TRUE;
+
+	} catch(Iex::BaseExc & e) {
+		FreeImage_OutputMessageProc(s_format_id, e.what());
+
+		return FALSE;
+	}
+
+}
+
+static BOOL DLL_CALLCONV
+Save(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) {
+	const char *channel_name[4] = { "R", "G", "B", "A" };
+	BOOL bIsFlipped = FALSE;
+	half *halfData = NULL;
+
+	if (!dib || !handle) return FALSE;
+
+	try {
+		// check for EXR_LC compression and verify that the format is RGB
+		if ((flags & EXR_LC) == EXR_LC) {
+			FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
+			if (((image_type != FIT_RGBF) && (image_type != FIT_RGBAF)) || ((flags & EXR_FLOAT) == EXR_FLOAT)) {
+				THROW (Iex::IoExc, "EXR_LC compression is only available with RGB[A]F images");
+			}
+			if ((FreeImage_GetWidth(dib) % 2) || (FreeImage_GetHeight(dib) % 2)) {
+				THROW (Iex::IoExc, "EXR_LC compression only works when the width and height are a multiple of 2");
+			}
+		}
+
+		// wrap the FreeImage IO stream
+		C_OStream ostream(io, handle);
+
+		// compression
+		Imf::Compression compress;
+		if ((flags & EXR_NONE) == EXR_NONE) {
+			// no compression
+			compress = Imf::NO_COMPRESSION;
+		} else if ((flags & EXR_ZIP) == EXR_ZIP) {
+			// zlib compression, in blocks of 16 scan lines
+			compress = Imf::ZIP_COMPRESSION;
+		} else if ((flags & EXR_PIZ) == EXR_PIZ) {
+			// piz-based wavelet compression
+			compress = Imf::PIZ_COMPRESSION;
+		} else if ((flags & EXR_PXR24) == EXR_PXR24) {
+			// lossy 24-bit float compression
+			compress = Imf::PXR24_COMPRESSION;
+		} else if ((flags & EXR_B44) == EXR_B44) {
+			// lossy 44% float compression
+			compress = Imf::B44_COMPRESSION;
+		} else {
+			// default value
+			compress = Imf::PIZ_COMPRESSION;
+		}
+
+		// create the header
+		int width  = FreeImage_GetWidth(dib);
+		int height = FreeImage_GetHeight(dib);
+		int dx = 0, dy = 0;
+
+		Imath::Box2i dataWindow (Imath::V2i (0, 0), Imath::V2i (width - 1, height - 1));
+		Imath::Box2i displayWindow (Imath::V2i (-dx, -dy), Imath::V2i (width - dx - 1, height - dy - 1));
+
+		Imf::Header header = Imf::Header(displayWindow, dataWindow, 1, 
+			Imath::V2f(0,0), 1, 
+			Imf::INCREASING_Y, compress);        		
+
+		// handle thumbnail
+		SetPreviewImage(dib, header);
+		
+		// check for EXR_LC compression
+		if ((flags & EXR_LC) == EXR_LC) {
+			return SaveAsEXR_LC(ostream, dib, header, width, height);
+		}
+
+		// output pixel type
+		Imf::PixelType pixelType;
+		if ((flags & EXR_FLOAT) == EXR_FLOAT) {
+			pixelType = Imf::FLOAT;	// save as float data type
+		} else {
+			// default value
+			pixelType = Imf::HALF;	// save as half data type
+		}
+
+		// check the data type and number of channels
+		int components = 0;
+		FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
+		switch(image_type) {
+			case FIT_FLOAT:
+				components = 1;
+				// insert luminance channel
+				header.channels().insert ("Y", Imf::Channel(pixelType));
+				break;
+			case FIT_RGBF:
+				components = 3;
+				for(int c = 0; c < components; c++) {
+					// insert R, G and B channels
+					header.channels().insert (channel_name[c], Imf::Channel(pixelType));
+				}
+				break;
+			case FIT_RGBAF:
+				components = 4;
+				for(int c = 0; c < components; c++) {
+					// insert R, G, B and A channels
+					header.channels().insert (channel_name[c], Imf::Channel(pixelType));
+				}
+				break;
+			default:
+				THROW (Iex::ArgExc, "Cannot save: invalid data type.\nConvert the image to float before saving as OpenEXR.");
+		}
+
+		// build a frame buffer (i.e. what we have on input)
+		Imf::FrameBuffer frameBuffer;
+
+		BYTE *bits = NULL;	// pointer to our pixel buffer
+		size_t bytespp = 0;	// size of our pixel in bytes
+		size_t bytespc = 0;	// size of our pixel component in bytes
+		unsigned pitch = 0;	// size of our yStride in bytes
+
+
+		if(pixelType == Imf::HALF) {
+			// convert from float to half
+			halfData = new(std::nothrow) half[width * height * components];
+			if (!halfData) THROW (Iex::NullExc, FI_MSG_ERROR_MEMORY);
+
+			for(int y = 0; y < height; y++) {
+				float *src_bits = (float*)FreeImage_GetScanLine(dib, height - 1 - y);
+				half *dst_bits = halfData + y * width * components;
+				for(int x = 0; x < width; x++) {
+					for(int c = 0; c < components; c++) {
+						dst_bits[c] = src_bits[c];
+					}
+					src_bits += components;
+					dst_bits += components;
+				}
+			}
+			bits = (BYTE*)halfData;
+			bytespc = sizeof(half);
+			bytespp = sizeof(half) * components;
+			pitch = sizeof(half) * width * components;
+		} else if(pixelType == Imf::FLOAT) {
+			// invert dib scanlines
+			bIsFlipped = FreeImage_FlipVertical(dib);
+		
+			bits = FreeImage_GetBits(dib);
+			bytespc = sizeof(float);
+			bytespp = sizeof(float) * components;
+			pitch = FreeImage_GetPitch(dib);
+		}
+
+		if(image_type == FIT_FLOAT) {
+			frameBuffer.insert ("Y",	// name
+				Imf::Slice (pixelType,	// type
+				(char*)(bits),			// base
+				bytespp,				// xStride
+				pitch));				// yStride
+		} else if ((image_type == FIT_RGBF) || (image_type == FIT_RGBAF)) {			
+			for(int c = 0; c < components; c++) {
+				char *channel_base = (char*)(bits) + c*bytespc;
+				frameBuffer.insert (channel_name[c],// name
+					Imf::Slice (pixelType,			// type
+					channel_base,					// base
+					bytespp,	// xStride
+					pitch));	// yStride
+			}
+		}
+
+		// write the data
+		Imf::OutputFile file (ostream, header);
+		file.setFrameBuffer (frameBuffer);
+		file.writePixels (height);
+
+		if(halfData != NULL) delete[] halfData;
+		if(bIsFlipped) {
+			// invert dib scanlines
+			FreeImage_FlipVertical(dib);
+		}
+
+		return TRUE;
+
+	} catch(Iex::BaseExc & e) {
+		if(halfData != NULL) delete[] halfData;
+		if(bIsFlipped) {
+			// invert dib scanlines
+			FreeImage_FlipVertical(dib);
+		}
+
+		FreeImage_OutputMessageProc(s_format_id, e.what());
+
+		return FALSE;
+	}	
+}
+
+// ==========================================================
+//   Init
+// ==========================================================
+
+void DLL_CALLCONV
+InitEXR(Plugin *plugin, int format_id) {
+	s_format_id = format_id;
+
+	plugin->format_proc = Format;
+	plugin->description_proc = Description;
+	plugin->extension_proc = Extension;
+	plugin->regexpr_proc = RegExpr;
+	plugin->open_proc = NULL;
+	plugin->close_proc = NULL;
+	plugin->pagecount_proc = NULL;
+	plugin->pagecapability_proc = NULL;
+	plugin->load_proc = Load;
+	plugin->save_proc = Save;
+	plugin->validate_proc = Validate;
+	plugin->mime_proc = MimeType;
+	plugin->supports_export_bpp_proc = SupportsExportDepth;
+	plugin->supports_export_type_proc = SupportsExportType;
+	plugin->supports_icc_profiles_proc = NULL;
+	plugin->supports_no_pixels_proc = SupportsNoPixels;
+}