///////////////////////////////////////////////////////////////////////////
//
// 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
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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//
///////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
//
// function makeCubeMap() -- makes cube-face environment maps
//
//-----------------------------------------------------------------------------
#include <makeCubeMap.h>
#include <resizeImage.h>
#include <ImfRgbaFile.h>
#include <ImfTiledRgbaFile.h>
#include <ImfStandardAttributes.h>
#include "Iex.h"
#include <iostream>
#include <algorithm>
#include <string>
#include <string.h>
#include "namespaceAlias.h"
using namespace IMF;
using namespace std;
using namespace IMATH;
namespace {
void
makeCubeMapSingleFile (EnvmapImage &image1,
Header &header,
RgbaChannels channels,
const char outFileName[],
int tileWidth,
int tileHeight,
LevelMode levelMode,
LevelRoundingMode roundingMode,
Compression compression,
int mapWidth,
float filterRadius,
int numSamples,
bool verbose)
{
if (levelMode == RIPMAP_LEVELS)
throw IEX::NoImplExc ("Cannot generate ripmap cube-face environments.");
//
// Open the file that will contain the cube-face map,
// and write the header.
//
int mapHeight = mapWidth * 6;
header.dataWindow() = Box2i (V2i (0, 0), V2i (mapWidth - 1, mapHeight - 1));
header.displayWindow() = header.dataWindow();
header.compression() = compression;
addEnvmap (header, ENVMAP_CUBE);
TiledRgbaOutputFile out (outFileName,
header,
channels,
tileWidth, tileHeight,
levelMode,
roundingMode);
if (verbose)
cout << "writing file " << outFileName << endl;
//
// Generate the pixels for the various levels of the cube-face map,
// and store them in the file. The pixels for the highest-resolution
// level are generated by resampling the original input image; for
// each of the other levels, the pixels are generated by resampling
// the previous level.
//
EnvmapImage image2;
EnvmapImage *iptr1 = &image1;
EnvmapImage *iptr2 = &image2;
for (int level = 0; level < out.numLevels(); ++level)
{
if (verbose)
cout << "level " << level << endl;
Box2i dw = out.dataWindowForLevel (level);
resizeCube (*iptr1, *iptr2, dw, filterRadius, numSamples);
out.setFrameBuffer (&iptr2->pixels()[0][0], 1, dw.max.x + 1);
for (int tileY = 0; tileY < out.numYTiles (level); ++tileY)
for (int tileX = 0; tileX < out.numXTiles (level); ++tileX)
out.writeTile (tileX, tileY, level);
swap (iptr1, iptr2);
}
if (verbose)
cout << "done." << endl;
}
void
makeCubeMapSixFiles (EnvmapImage &image1,
Header &header,
RgbaChannels channels,
const char outFileName[],
int tileWidth,
int tileHeight,
Compression compression,
int mapWidth,
float filterRadius,
int numSamples,
bool verbose)
{
static const char *faceNames[] =
{"+X", "-X", "+Y", "-Y", "+Z", "-Z"};
size_t pos = strchr (outFileName, '%') - outFileName;
int mapHeight = mapWidth * 6;
const Box2i dw (V2i (0, 0), V2i (mapWidth - 1, mapHeight - 1));
const Box2i faceDw (V2i (0, 0), V2i (mapWidth - 1, mapWidth - 1));
EnvmapImage image2;
resizeCube (image1, image2, dw, filterRadius, numSamples);
const Rgba *pixels = &(image2.pixels())[0][0];
for (int i = 0; i < 6; ++i)
{
string name = string (outFileName).replace (pos, 1, faceNames[i]);
if (verbose)
cout << "writing file " << name << endl;
TiledRgbaOutputFile out (name.c_str(),
tileWidth, tileHeight,
ONE_LEVEL, ROUND_DOWN,
faceDw, // displayWindow
faceDw, // dataWindow
channels,
1, // pixelAspectRatio
V2f (0, 0), // screenWindowCenter
1, // screenWindowWidth
INCREASING_Y, // lineOrder
compression);
out.setFrameBuffer (pixels, 1, dw.max.x + 1);
for (int tileY = 0; tileY < out.numYTiles(); ++tileY)
for (int tileX = 0; tileX < out.numXTiles(); ++tileX)
out.writeTile (tileX, tileY);
pixels += mapWidth * mapWidth;
}
if (verbose)
cout << "done." << endl;
}
} //namespace
void
makeCubeMap (EnvmapImage &image1,
Header &header,
RgbaChannels channels,
const char outFileName[],
int tileWidth,
int tileHeight,
LevelMode levelMode,
LevelRoundingMode roundingMode,
Compression compression,
int mapWidth,
float filterRadius,
int numSamples,
bool verbose)
{
if (strchr (outFileName, '%'))
{
makeCubeMapSixFiles (image1,
header,
channels,
outFileName,
tileWidth,
tileHeight,
compression,
mapWidth,
filterRadius,
numSamples,
verbose);
}
else
{
makeCubeMapSingleFile (image1,
header,
channels,
outFileName,
tileWidth,
tileHeight,
levelMode,
roundingMode,
compression,
mapWidth,
filterRadius,
numSamples,
verbose);
}
}