Disabled external gits
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///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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//-----------------------------------------------------------------------------
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//
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// Code examples that show how class InputFile and class OutputFile
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// can be used to read and write OpenEXR image files with an arbitrary
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// set of channels.
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//
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//-----------------------------------------------------------------------------
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#include <ImfOutputFile.h>
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#include <ImfInputFile.h>
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#include <ImfChannelList.h>
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#include <ImfStringAttribute.h>
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#include <ImfMatrixAttribute.h>
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#include <ImfArray.h>
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#include "drawImage.h"
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#include <iostream>
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#include "namespaceAlias.h"
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using namespace IMF;
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using namespace std;
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using namespace IMATH_NAMESPACE;
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void
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writeGZ1 (const char fileName[],
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const half *gPixels,
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const float *zPixels,
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int width,
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int height)
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{
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//
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// Write an image with only a G (green) and a Z (depth) channel,
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// using class OutputFile.
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//
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// - create a file header
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// - add G and Z channels to the header
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// - open the file, and store the header in the file
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// - describe the memory layout of the G anx Z pixels
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// - store the pixels in the file
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//
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Header header (width, height);
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header.channels().insert ("G", Channel (IMF::HALF));
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header.channels().insert ("Z", Channel (IMF::FLOAT));
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OutputFile file (fileName, header);
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FrameBuffer frameBuffer;
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frameBuffer.insert ("G", // name
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Slice (IMF::HALF, // type
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(char *) gPixels, // base
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sizeof (*gPixels) * 1, // xStride
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sizeof (*gPixels) * width)); // yStride
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frameBuffer.insert ("Z", // name
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Slice (IMF::FLOAT, // type
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(char *) zPixels, // base
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sizeof (*zPixels) * 1, // xStride
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sizeof (*zPixels) * width)); // yStride
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file.setFrameBuffer (frameBuffer);
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file.writePixels (height);
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}
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void
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writeGZ2 (const char fileName[],
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const half *gPixels,
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const float *zPixels,
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int width,
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int height,
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const Box2i &dataWindow)
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{
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//
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// Write an image with only a G (green) and a Z (depth) channel,
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// using class OutputFile. Don't store the whole image in the
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// file, but crop it according to the given data window.
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//
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// - create a file header
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// - set the header's data window
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// - add G and Z channels to the header
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// - open the file, and store the header in the file
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// - describe the memory layout of the G anx Z pixels
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// - store the pixels in the file
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//
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Header header (width, height);
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header.dataWindow() = dataWindow;
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header.channels().insert ("G", Channel (IMF::HALF));
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header.channels().insert ("Z", Channel (IMF::FLOAT));
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OutputFile file (fileName, header);
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FrameBuffer frameBuffer;
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frameBuffer.insert ("G", // name
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Slice (IMF::HALF, // type
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(char *) gPixels, // base
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sizeof (*gPixels) * 1, // xStride
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sizeof (*gPixels) * width)); // yStride
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frameBuffer.insert ("Z", // name
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Slice (IMF::FLOAT, // type
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(char *) zPixels, // base
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sizeof (*zPixels) * 1, // xStride
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sizeof (*zPixels) * width)); // yStride
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file.setFrameBuffer (frameBuffer);
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file.writePixels (dataWindow.max.y - dataWindow.min.y + 1);
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}
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void
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readGZ1 (const char fileName[],
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Array2D<half> &rPixels,
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Array2D<half> &gPixels,
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Array2D<float> &zPixels,
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int &width, int &height)
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{
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//
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// Read an image using class InputFile. Try to read two
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// channels, R and G, of type HALF, and one channel, Z,
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// of type FLOAT. Store the R, G, and Z pixels in three
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// separate memory buffers.
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// If a channel is missing in the file, the buffer for that
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// channel will be filled with an appropriate default value.
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//
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// - open the file
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// - allocate memory for the pixels
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// - describe the layout of the R, G, and Z pixel buffers
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// - read the pixels from the file
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//
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InputFile file (fileName);
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Box2i dw = file.header().dataWindow();
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width = dw.max.x - dw.min.x + 1;
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height = dw.max.y - dw.min.y + 1;
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rPixels.resizeErase (height, width);
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gPixels.resizeErase (height, width);
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zPixels.resizeErase (height, width);
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FrameBuffer frameBuffer;
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frameBuffer.insert ("R", // name
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Slice (IMF::HALF, // type
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(char *) (&rPixels[0][0] - // base
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dw.min.x -
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dw.min.y * width),
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sizeof (rPixels[0][0]) * 1, // xStride
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sizeof (rPixels[0][0]) * width, // yStride
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1, 1, // x/y sampling
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0.0)); // fillValue
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frameBuffer.insert ("G", // name
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Slice (IMF::HALF, // type
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(char *) (&gPixels[0][0] - // base
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dw.min.x -
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dw.min.y * width),
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sizeof (gPixels[0][0]) * 1, // xStride
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sizeof (gPixels[0][0]) * width, // yStride
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1, 1, // x/y sampling
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0.0)); // fillValue
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frameBuffer.insert ("Z", // name
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Slice (IMF::FLOAT, // type
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(char *) (&zPixels[0][0] - // base
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dw.min.x -
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dw.min.y * width),
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sizeof (zPixels[0][0]) * 1, // xStride
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sizeof (zPixels[0][0]) * width, // yStride
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1, 1, // x/y sampling
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FLT_MAX)); // fillValue
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file.setFrameBuffer (frameBuffer);
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file.readPixels (dw.min.y, dw.max.y);
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}
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void
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readGZ2 (const char fileName[],
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Array2D<GZ> &pixels,
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int &width, int &height)
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{
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//
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// Read an image using class InputFile. Try to read one channel,
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// G, of type HALF, and one channel, Z, of type FLOAT. In memory,
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// the G and Z channels will be interleaved in a single buffer.
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//
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// - open the file
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// - allocate memory for the pixels
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// - describe the layout of the GZ pixel buffer
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// - read the pixels from the file
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//
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InputFile file (fileName);
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Box2i dw = file.header().dataWindow();
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width = dw.max.x - dw.min.x + 1;
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height = dw.max.y - dw.min.y + 1;
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int dx = dw.min.x;
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int dy = dw.min.y;
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pixels.resizeErase (height, width);
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FrameBuffer frameBuffer;
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frameBuffer.insert ("G", // name
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Slice (IMF::HALF, // type
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(char *) &pixels[-dy][-dx].g, // base
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sizeof (pixels[0][0]) * 1, // xStride
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sizeof (pixels[0][0]) * width)); // yStride
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frameBuffer.insert ("Z", // name
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Slice (IMF::FLOAT, // type
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(char *) &pixels[-dy][-dx].z, // base
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sizeof (pixels[0][0]) * 1, // xStride
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sizeof (pixels[0][0]) * width)); // yStride
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file.setFrameBuffer (frameBuffer);
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file.readPixels (dw.min.y, dw.max.y);
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}
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void
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generalInterfaceExamples ()
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{
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cout << "\nGZ (green, depth) images\n" << endl;
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cout << "drawing image" << endl;
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int w = 800;
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int h = 600;
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Array2D<half> gp (h, w);
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Array2D<float> zp (h, w);
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drawImage2 (gp, zp, w, h);
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cout << "writing entire image" << endl;
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writeGZ1 ("gz1.exr", &gp[0][0], &zp[0][0], w, h);
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cout << "writing cropped image" << endl;
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writeGZ2 ("gz2.exr", &gp[0][0], &zp[0][0], w, h,
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Box2i (V2i (w/6, h/6), V2i (w/2, h/2)));
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cout << "reading file into separate per-channel buffers" << endl;
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Array2D<half> rp (1, 1);
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readGZ1 ("gz2.exr", rp, gp, zp, w, h);
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cout << "reading file into interleaved multi-channel buffer" << endl;
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Array2D<GZ> gzp (1, 1);
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readGZ2 ("gz2.exr", gzp, w, h);
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}
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