openexr-write (empty) → 0.1.0.0
raw patch · 13 files changed
+1349/−0 lines, 13 filesdep +basedep +binarydep +bytestringsetup-changedbinary-added
Dependencies added: base, binary, bytestring, data-binary-ieee754, deepseq, directory, hspec, openexr-write, split, vector, vector-split, zlib
Files
- .gitignore +1/−0
- .travis.yml +169/−0
- LICENSE +674/−0
- README.md +40/−0
- Setup.hs +2/−0
- openexr-write.cabal +51/−0
- src/Graphics/OpenEXR.hs +268/−0
- stack.yaml +66/−0
- test/Spec.hs +34/−0
- test/generate.cpp +44/−0
- test/images/red_1x1_no_compression.exr binary
- test/images/red_1x1_zip_compression.exr binary
- test/images/red_1x1_zips_compression.exr binary
+ .gitignore view
@@ -0,0 +1,1 @@+.stack-work
+ .travis.yml view
@@ -0,0 +1,169 @@+# This is the complex Travis configuration, which is intended for use+# on open source libraries which need compatibility across multiple GHC+# versions, must work with cabal-install, and should be+# cross-platform. For more information and other options, see:+#+# https://docs.haskellstack.org/en/stable/travis_ci/+#+# Copy these contents into the root directory of your Github project in a file+# named .travis.yml++# Use new container infrastructure to enable caching+sudo: false++# Do not choose a language; we provide our own build tools.+language: generic++# Caching so the next build will be fast too.+cache:+ directories:+ - $HOME/.ghc+ - $HOME/.cabal+ - $HOME/.stack++# The different configurations we want to test. We have BUILD=cabal which uses+# cabal-install, and BUILD=stack which uses Stack. More documentation on each+# of those below.+#+# We set the compiler values here to tell Travis to use a different+# cache file per set of arguments.+#+# If you need to have different apt packages for each combination in the+# matrix, you can use a line such as:+# addons: {apt: {packages: [libfcgi-dev,libgmp-dev]}}+matrix:+ include:+ # We grab the appropriate GHC and cabal-install versions from hvr's PPA. See:+ # https://github.com/hvr/multi-ghc-travis+ addons: {apt: {packages: [cabal-install-1.18,ghc-7.8.4,happy-1.19.5,alex-3.1.7], sources: [hvr-ghc]}}+ - env: BUILD=cabal GHCVER=7.10.3 CABALVER=1.22 HAPPYVER=1.19.5 ALEXVER=3.1.7+ compiler: ": #GHC 7.10.3"+ addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3,happy-1.19.5,alex-3.1.7], sources: [hvr-ghc]}}+ - env: BUILD=cabal GHCVER=8.0.2 CABALVER=1.24 HAPPYVER=1.19.5 ALEXVER=3.1.7+ compiler: ": #GHC 8.0.2"+ addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.2,happy-1.19.5,alex-3.1.7], sources: [hvr-ghc]}}++ # Build with the newest GHC and cabal-install. This is an accepted failure,+ # see below.+ - env: BUILD=cabal GHCVER=head CABALVER=head HAPPYVER=1.19.5 ALEXVER=3.1.7+ compiler: ": #GHC HEAD"+ addons: {apt: {packages: [cabal-install-head,ghc-head,happy-1.19.5,alex-3.1.7], sources: [hvr-ghc]}}++ # The Stack builds. We can pass in arbitrary Stack arguments via the ARGS+ # variable, such as using --stack-yaml to point to a different file.+ - env: BUILD=stack ARGS=""+ compiler: ": #stack default"+ addons: {apt: {packages: [libgmp-dev]}}++ - env: BUILD=stack ARGS="--resolver lts-7"+ compiler: ": #stack 8.0.1"+ addons: {apt: {packages: [libgmp-dev]}}++ - env: BUILD=stack ARGS="--resolver lts-8"+ compiler: ": #stack 8.0.2"+ addons: {apt: {packages: [libgmp-dev]}}++ # Nightly builds are allowed to fail+ - env: BUILD=stack ARGS="--resolver nightly"+ compiler: ": #stack nightly"+ addons: {apt: {packages: [libgmp-dev]}}++ # Build on macOS in addition to Linux+ - env: BUILD=stack ARGS=""+ compiler: ": #stack default osx"+ os: osx++ - env: BUILD=stack ARGS="--resolver lts-7"+ compiler: ": #stack 8.0.1 osx"+ os: osx++ - env: BUILD=stack ARGS="--resolver lts-8"+ compiler: ": #stack 8.0.2 osx"+ os: osx++ - env: BUILD=stack ARGS="--resolver nightly"+ compiler: ": #stack nightly osx"+ os: osx++ allow_failures:+ - env: BUILD=cabal GHCVER=head CABALVER=head HAPPYVER=1.19.5 ALEXVER=3.1.7+ - env: BUILD=stack ARGS="--resolver nightly"++before_install:+# Using compiler above sets CC to an invalid value, so unset it+- unset CC++# We want to always allow newer versions of packages when building on GHC HEAD+- CABALARGS=""+- if [ "x$GHCVER" = "xhead" ]; then CABALARGS=--allow-newer; fi++# Download and unpack the stack executable+- export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$HOME/.local/bin:/opt/alex/$ALEXVER/bin:/opt/happy/$HAPPYVER/bin:$HOME/.cabal/bin:$PATH+- mkdir -p ~/.local/bin+- |+ if [ `uname` = "Darwin" ]+ then+ travis_retry curl --insecure -L https://www.stackage.org/stack/osx-x86_64 | tar xz --strip-components=1 --include '*/stack' -C ~/.local/bin+ else+ travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'+ fi++ # Use the more reliable S3 mirror of Hackage+ mkdir -p $HOME/.cabal+ echo 'remote-repo: hackage.haskell.org:http://hackage.fpcomplete.com/' > $HOME/.cabal/config+ echo 'remote-repo-cache: $HOME/.cabal/packages' >> $HOME/.cabal/config++ if [ "$CABALVER" != "1.16" ]+ then+ echo 'jobs: $ncpus' >> $HOME/.cabal/config+ fi++install:+- echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"+- if [ -f configure.ac ]; then autoreconf -i; fi+- |+ set -ex+ case "$BUILD" in+ stack)+ stack --no-terminal --install-ghc $ARGS test --bench --only-dependencies+ ;;+ cabal)+ cabal --version+ travis_retry cabal update++ # Get the list of packages from the stack.yaml file+ PACKAGES=$(stack --install-ghc query locals | grep '^ *path' | sed 's@^ *path:@@')++ cabal install --only-dependencies --enable-tests --enable-benchmarks --force-reinstalls --ghc-options=-O0 --reorder-goals --max-backjumps=-1 $CABALARGS $PACKAGES+ ;;+ esac+ set +ex++script:+- |+ set -ex+ case "$BUILD" in+ stack)+ stack --no-terminal $ARGS test --bench --no-run-benchmarks --haddock --no-haddock-deps+ ;;+ cabal)+ cabal install --enable-tests --enable-benchmarks --force-reinstalls --ghc-options=-O0 --reorder-goals --max-backjumps=-1 $CABALARGS $PACKAGES++ ORIGDIR=$(pwd)+ for dir in $PACKAGES+ do+ cd $dir+ cabal check || [ "$CABALVER" == "1.16" ]+ cabal sdist+ PKGVER=$(cabal info . | awk '{print $2;exit}')+ SRC_TGZ=$PKGVER.tar.gz+ cd dist+ tar zxfv "$SRC_TGZ"+ cd "$PKGVER"+ cabal configure --enable-tests+ cabal build+ cd $ORIGDIR+ done+ ;;+ esac+ set +ex
+ LICENSE view
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Interpretation of Sections 15 and 16.++ If the disclaimer of warranty and limitation of liability provided+above cannot be given local legal effect according to their terms,+reviewing courts shall apply local law that most closely approximates+an absolute waiver of all civil liability in connection with the+Program, unless a warranty or assumption of liability accompanies a+copy of the Program in return for a fee.++ END OF TERMS AND CONDITIONS++ How to Apply These Terms to Your New Programs++ If you develop a new program, and you want it to be of the greatest+possible use to the public, the best way to achieve this is to make it+free software which everyone can redistribute and change under these terms.++ To do so, attach the following notices to the program. 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If not, see <http://www.gnu.org/licenses/>.++Also add information on how to contact you by electronic and paper mail.++ If the program does terminal interaction, make it output a short+notice like this when it starts in an interactive mode:++ {project} Copyright (C) {year} {fullname}+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.+ This is free software, and you are welcome to redistribute it+ under certain conditions; type `show c' for details.++The hypothetical commands `show w' and `show c' should show the appropriate+parts of the General Public License. Of course, your program's commands+might be different; for a GUI interface, you would use an "about box".++ You should also get your employer (if you work as a programmer) or school,+if any, to sign a "copyright disclaimer" for the program, if necessary.+For more information on this, and how to apply and follow the GNU GPL, see+<http://www.gnu.org/licenses/>.++ The GNU General Public License does not permit incorporating your program+into proprietary programs. If your program is a subroutine library, you+may consider it more useful to permit linking proprietary applications with+the library. If this is what you want to do, use the GNU Lesser General+Public License instead of this License. But first, please read+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+ README.md view
@@ -0,0 +1,40 @@+Haskell OpenEXR Library+=======================++This library can write colored images which use floating point values into+OpenEXR (v2) high-dynamic-range file format.++Supported features:++- scanline format+- compression (ZIPS, ZIP)+- pixel format (RGB float32)++++Usage+-----++Modify project's `stack.yaml` by adding path to `openexr-write` package.++```+packages:+- '.'+- path/openexr-write+```++An image can be written by calling `writeFile` function. For example,+following code stores a compressed image consisting of one red pixel.++```+module Main where++import qualified Data.Vector as V+import qualified Graphics.OpenEXR as EXR+++main :: IO ()+main = do+ let image = EXR.ImageRGBF 1 1 (V.fromList [EXR.PixelRGBF 1.0 0.0 0.0])+ EXR.writeFile "image.exr" image EXR.ZipCompression+```
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ openexr-write.cabal view
@@ -0,0 +1,51 @@+name: openexr-write+version: 0.1.0.0+synopsis: Library to write images in OpenEXR HDR file format.+description: OpenEXR allows to store pixels as floating point numbers and thus can capture high dynamic range.+homepage: https://github.com/pavolzetor/openexr-write#readme+license: GPL-3+license-file: LICENSE+author: Pavol Klacansky+maintainer: pavol@klacansky.com+copyright: 2017 Pavol Klacansky+category: Graphics+build-type: Simple+extra-source-files: .gitignore+ .travis.yml+ README.md+ stack.yaml+ test/generate.cpp+ test/images/red_1x1_no_compression.exr+ test/images/red_1x1_zips_compression.exr+ test/images/red_1x1_zip_compression.exr+cabal-version: >=1.10++library+ hs-source-dirs: src+ exposed-modules: Graphics.OpenEXR+ build-depends: base >= 4.8 && < 5+ , binary+ , bytestring+ , data-binary-ieee754+ , deepseq+ , split+ , vector+ , vector-split+ , zlib+ default-language: Haskell2010++test-suite spec+ type: exitcode-stdio-1.0+ hs-source-dirs: test+ main-is: Spec.hs+ build-depends: base >= 4.7 && < 5+ , bytestring+ , directory+ , hspec+ , openexr-write+ , vector+ default-language: Haskell2010++source-repository head+ type: git+ location: https://github.com/pavolzetor/openexr-write
+ src/Graphics/OpenEXR.hs view
@@ -0,0 +1,268 @@+{-# LANGUAGE DeriveAnyClass, DeriveGeneric, FlexibleContexts, OverloadedStrings #-}+++-------------------------------------------------------------------------------+-- |+-- Module : Graphics.OpenEXR+-- Copyright : (c) 2017 Pavol Klacansky+-- License : GPL-3+--+-- Maintainer : pavol@klacansky.com+-- Stability : experimental+-- Portability : portable+--+-- Library for writting OpenEXR images which support high dynamic range. These+-- images are common in computer graphics, especially ray tracing, and can be+-- used to delay quantization to the post-processing stage.+--+--+-- An example of writting 1x1 ZIP compressed image consisting of a red pixel.+--+-- > module Main where+-- >+-- > import qualified Data.Vector as V+-- > import qualified Graphics.OpenEXR as EXR+-- >+-- >+-- > main :: IO ()+-- > main = do+-- > let image = EXR.ImageRGBF 1 1 (V.fromList [EXR.PixelRGBF 1.0 0.0 0.0])+-- > EXR.writeFile "image.exr" image EXR.ZipCompression+-------------------------------------------------------------------------------+++++module Graphics.OpenEXR+ ( Image(..)+ , PixelRGBF(..)+ , CompressionType(..)+ , writeFile+ ) where +++++import Prelude hiding (writeFile)++import Codec.Compression.Zlib (compress)+import Control.DeepSeq (NFData)+import Data.Binary (Binary, get, put)+import Data.Binary.IEEE754 (putFloat32le)+import Data.Binary.Put (Put, putLazyByteString, putWord8, putWord32le, putWord64le, runPut)+import qualified Data.ByteString.Lazy as BL+import Data.List.Split (chunksOf)+import qualified Data.Vector as V+import qualified Data.Vector.Split as V -- TODO: implement internally (trivial) to reduce dependency if we want this module as separate package+import Data.Word (Word8, Word32)+import GHC.Generics (Generic)+++++data Image = ImageRGBF+ { imageWidth :: !Int+ , imageHeight :: !Int+ , imageData :: V.Vector PixelRGBF -- ^ Stored in row-major layout+ } deriving (Generic, NFData, Show)+++data PixelRGBF = PixelRGBF !Float !Float !Float+ deriving (Generic, NFData, Show)+++data CompressionType = NoCompression -- ^ No compression applied+ | ZipsCompression -- ^ DEFLATE lossless compression applied per scanline+ | ZipCompression -- ^ DEFLATE lossless compression applied per 16 scanlines+++data Attribute = Attribute BL.ByteString AttributeType+++data AttributeType = Box2i (Word32, Word32, Word32, Word32)+ | Chlist [Channel]+ | Compression CompressionType+ | Float Float+ | LineOrder LineOrderType+ | V2f (Float, Float)+++data Channel = Channel+ { name :: BL.ByteString+ , pixelType :: PixelType+ , pLinear :: Word8+ , reserved :: (Word8, Word8, Word8)+ , xSampling :: Word32+ , ySampling :: Word32+ }+++data PixelType = PixelUint | PixelHalf | PixelFloat+ deriving Enum+++data LineOrderType = IncreasingY | DecreasingY | RandomY+ deriving Enum+++++instance Binary Attribute where+ get = undefined+ put (Attribute n t) = putLazyByteString (BL.snoc n 0) >> put t+++instance Binary AttributeType where+ get = undefined+ put a@(Box2i (x, y, z, w)) = putLazyByteString "box2i\0" >> putWord32le (attrSize a) >> putWord32le x >> putWord32le y >> putWord32le z >> putWord32le w+ put a@(Chlist xs) = putLazyByteString "chlist\0" >> putWord32le (attrSize a) >> mapM_ put xs >> put '\0'+ put a@(Compression x) = putLazyByteString "compression\0" >> putWord32le (attrSize a) >> put x+ put a@(Float x) = putLazyByteString "float\0" >> putWord32le (attrSize a) >> putFloat32le x+ put a@(LineOrder x) = putLazyByteString "lineOrder\0" >> putWord32le (attrSize a) >> put x+ put a@(V2f (x, y)) = putLazyByteString "v2f\0" >> putWord32le (attrSize a) >> putFloat32le x >> putFloat32le y+++instance Binary Channel where+ get = undefined+ put x = do+ putLazyByteString (BL.snoc (name x) 0)+ put (pixelType x)+ put (pLinear x)+ put (reserved x)+ putWord32le (xSampling x)+ putWord32le (ySampling x)+++instance Binary PixelType where+ get = undefined+ put = putWord32le . fromIntegral . fromEnum+++instance Enum CompressionType where+ fromEnum NoCompression = 0+ fromEnum ZipsCompression = 2+ fromEnum ZipCompression = 3+ toEnum _ = undefined+++instance Binary CompressionType where+ get = undefined+ put = putWord8 . fromIntegral . fromEnum+++instance Binary LineOrderType where+ get = undefined+ put = putWord8 . fromIntegral . fromEnum+++++-- | Write an 'Image' using a 'CompressionType' to an OpenEXR formatted file+writeFile :: FilePath -> Image -> CompressionType -> IO ()+writeFile filepath img compression = BL.writeFile filepath (header `BL.append` offTable `BL.append` (BL.concat cs))+ where header = runPut (magicNumber >> versionField >> mapM_ put attributes >> put '\0')+ offTable = runPut (offsetTable (fromIntegral $ BL.length header) ((fromIntegral . BL.length) <$> cs))+ cs = runPut <$> chunks img compression+ attributes = [ Attribute "channels" channels+ , Attribute "compression" (Compression compression)+ , Attribute "dataWindow" (Box2i (0, 0, w, h))+ , Attribute "displayWindow" (Box2i (0, 0, w, h))+ , Attribute "lineOrder" (LineOrder IncreasingY)+ , Attribute "pixelAspectRatio" (Float 1)+ , Attribute "screenWindowCenter" (V2f (0, 0))+ , Attribute "screenWindowWidth" (Float 1)]+ channels = Chlist [ Channel "B" PixelFloat 0 (0, 0, 0) 1 1+ , Channel "G" PixelFloat 0 (0, 0, 0) 1 1+ , Channel "R" PixelFloat 0 (0, 0, 0) 1 1+ ]+ w = fromIntegral (imageWidth img) - 1+ h = fromIntegral (imageHeight img) - 1+++++attrSize :: AttributeType -> Word32+attrSize (Box2i _) = 16+attrSize (Chlist xs) = fromIntegral ((sum . map (\x -> (BL.length . name $ x) + 1 + 4 + 1 + 3 + 4 + 4) $ xs) + 1)+attrSize (Compression _) = 1+attrSize (Float _) = 4+attrSize (LineOrder _) = 1+attrSize (V2f _) = 8+++++magicNumber :: Put+magicNumber = mapM_ putWord8 [0x76, 0x2F, 0x31, 0x01]+++++versionField :: Put+versionField = mapM_ putWord8 [0x02, 0x00, 0x00, 0x00]+++++-- TODO: use some generic version of length+-- TODO: partial function (init)+offsetTable :: Integral a => a -> [a] -> Put+offsetTable offset chunksLengths = mapM_ (\x -> putWord64le (fromIntegral (offset + 8*nChunks + x))) . scanl (+) 0 . init $ chunksLengths+ where nChunks = fromIntegral $ length chunksLengths+++++scanlinesPerChunk :: Num a => CompressionType -> a+scanlinesPerChunk ZipCompression = 16+scanlinesPerChunk _ = 1+++++transform :: CompressionType -> (BL.ByteString -> BL.ByteString)+transform ZipsCompression = compress . preZip+transform ZipCompression = compress . preZip+transform _ = id+++++chunks :: Image -> CompressionType -> [Put]+chunks (ImageRGBF width height px) c = uncurry f <$> zip [0,yStride..] (chunksOf yStride cs)+ where cs = V.chunksOf width px+ yStride = scanlinesPerChunk c+ f y xs = do+ let d = runPut . mapM_ scanline $ xs+ transformed = transform c d+ result = if BL.length d <= BL.length transformed then d else transformed+ putWord32le (fromIntegral y)+ putWord32le (fromIntegral (BL.length result))+ putLazyByteString result+++++scanline :: V.Vector PixelRGBF -> Put+scanline xs = do+ mapM_ (\(PixelRGBF _ _ b) -> putFloat32le b) xs+ mapM_ (\(PixelRGBF _ g _) -> putFloat32le g) xs+ mapM_ (\(PixelRGBF r _ _) -> putFloat32le r) xs+++++-- TODO: potentially optimize by not creating the temporary copy and instead use strided access+-- TODO: converting to lists may be inefficient, but lazyness should take care of it+preZip :: BL.ByteString -> BL.ByteString+preZip d = BL.pack (x:zipWith predictor (x:xs ++ ys) (xs ++ ys))+ where (x:xs, ys) = deinterleave (BL.unpack d)+ predictor p x = fromIntegral x - fromIntegral p + (128 + 256)+++++deinterleave :: [a] -> ([a], [a])+deinterleave [x] = ([x], [])+deinterleave [x,y] = ([x], [y])+deinterleave (x:y:xs) = let (as, bs) = deinterleave xs in (x:as, y:bs)
+ stack.yaml view
@@ -0,0 +1,66 @@+# This file was automatically generated by 'stack init'+#+# Some commonly used options have been documented as comments in this file.+# For advanced use and comprehensive documentation of the format, please see:+# http://docs.haskellstack.org/en/stable/yaml_configuration/++# Resolver to choose a 'specific' stackage snapshot or a compiler version.+# A snapshot resolver dictates the compiler version and the set of packages+# to be used for project dependencies. For example:+#+# resolver: lts-3.5+# resolver: nightly-2015-09-21+# resolver: ghc-7.10.2+# resolver: ghcjs-0.1.0_ghc-7.10.2+# resolver:+# name: custom-snapshot+# location: "./custom-snapshot.yaml"+resolver: lts-8.21++# User packages to be built.+# Various formats can be used as shown in the example below.+#+# packages:+# - some-directory+# - https://example.com/foo/bar/baz-0.0.2.tar.gz+# - location:+# git: https://github.com/commercialhaskell/stack.git+# commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a+# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a+# extra-dep: true+# subdirs:+# - auto-update+# - wai+#+# A package marked 'extra-dep: true' will only be built if demanded by a+# non-dependency (i.e. a user package), and its test suites and benchmarks+# will not be run. This is useful for tweaking upstream packages.+packages:+- '.'+# Dependency packages to be pulled from upstream that are not in the resolver+# (e.g., acme-missiles-0.3)+extra-deps: []++# Override default flag values for local packages and extra-deps+flags: {}++# Extra package databases containing global packages+extra-package-dbs: []++# Control whether we use the GHC we find on the path+# system-ghc: true+#+# Require a specific version of stack, using version ranges+# require-stack-version: -any # Default+# require-stack-version: ">=1.2"+#+# Override the architecture used by stack, especially useful on Windows+# arch: i386+# arch: x86_64+#+# Extra directories used by stack for building+# extra-include-dirs: [/path/to/dir]+# extra-lib-dirs: [/path/to/dir]+#+# Allow a newer minor version of GHC than the snapshot specifies+# compiler-check: newer-minor
+ test/Spec.hs view
@@ -0,0 +1,34 @@+-- TODO: maybe add function that returns bytestring+-- TODO: test against images saved by the official OpenEXR library++import qualified Data.ByteString.Lazy as BL+import qualified Data.Vector as V+import System.Directory (removeFile)+import Test.Hspec++import qualified Graphics.OpenEXR as EXR+++++main :: IO ()+main = hspec $ after_ (removeFile "tmp.exr") $ do+ let image = EXR.ImageRGBF 1 1 (V.fromList [EXR.PixelRGBF 1 0 0])+ folder = "test/images/"++ describe "OpenEXR.writeFile" $ do+ it "saves image without compression" $ do+ EXR.writeFile "tmp.exr" image EXR.NoCompression+ output <- BL.readFile "tmp.exr"+ valid <- BL.readFile (folder ++ "red_1x1_no_compression.exr")+ output `shouldBe` valid+ it "saves image with ZIPS compression" $ do+ EXR.writeFile "tmp.exr" image EXR.ZipsCompression+ output <- BL.readFile "tmp.exr"+ valid <- BL.readFile (folder ++ "red_1x1_zips_compression.exr")+ output `shouldBe` valid+ it "saves image with ZIP compression" $ do+ EXR.writeFile "tmp.exr" image EXR.ZipCompression+ output <- BL.readFile "tmp.exr"+ valid <- BL.readFile (folder ++ "red_1x1_zip_compression.exr")+ output `shouldBe` valid
+ test/generate.cpp view
@@ -0,0 +1,44 @@+/* PURPOSE: generate test files using ILM's OpenEXR library (i.e., the standard) */+++#include <OpenEXR/ImfChannelList.h>+#include <OpenEXR/ImfOutputFile.h>+++++static void+generate(char const *const filepath, Imf::Compression const compression)+{+ float const r_pixels[] = {1.0f};+ float const g_pixels[] = {0.0f};+ float const b_pixels[] = {0.0f};+ int const width = 1;+ int const height = 1;++ Imf::Header header(width, height, 1, Imath::V2f(0, 0), 1, Imf::INCREASING_Y, compression);+ header.channels().insert("B", Imf::Channel(Imf::FLOAT));+ header.channels().insert("G", Imf::Channel(Imf::FLOAT));+ header.channels().insert("R", Imf::Channel(Imf::FLOAT));++ Imf::OutputFile file(filepath, header);++ Imf::FrameBuffer fb;+ fb.insert("B", Imf::Slice(Imf::FLOAT, (char *)b_pixels, sizeof *b_pixels, sizeof *b_pixels*width));+ fb.insert("G", Imf::Slice(Imf::FLOAT, (char *)g_pixels, sizeof *g_pixels, sizeof *g_pixels*width));+ fb.insert("R", Imf::Slice(Imf::FLOAT, (char *)r_pixels, sizeof *r_pixels, sizeof *r_pixels*width));++ file.setFrameBuffer(fb);+ file.writePixels(height);+}+++++int+main(void)+{+ generate("images/red_1x1_no_compression.exr", Imf::NO_COMPRESSION);+ generate("images/red_1x1_zips_compression.exr", Imf::ZIPS_COMPRESSION);+ generate("images/red_1x1_zip_compression.exr", Imf::ZIP_COMPRESSION);+}
+ test/images/red_1x1_no_compression.exr view
binary file changed (absent → 341 bytes)
+ test/images/red_1x1_zip_compression.exr view
binary file changed (absent → 341 bytes)
+ test/images/red_1x1_zips_compression.exr view
binary file changed (absent → 341 bytes)