gnu: Add OpenEXR and IlmBase.

* gnu/packages/graphics.scm (ilmbase, openexr): New variables.
* gnu/packages/patches/openexr-missing-samples.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

gnu-system.am

@@ -460,6 +460,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/nvi-assume-preserve-path.patch		\
   gnu/packages/patches/nvi-dbpagesize-binpower.patch		\
   gnu/packages/patches/nvi-db4.patch				\
+  gnu/packages/patches/openexr-missing-samples.patch		\
   gnu/packages/patches/orpheus-cast-errors-and-includes.patch	\
   gnu/packages/patches/ots-no-include-missing-file.patch	\
   gnu/packages/patches/patchelf-page-size.patch			\

gnu/packages/graphics.scm

@@ -22,6 +22,9 @@
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system cmake)
   #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages compression)
   #:use-module (gnu packages multiprecision)
   #:use-module (gnu packages boost))
 
@@ -63,3 +66,56 @@ many more.")
     ;; The 'LICENSE' file explains that a subset is available under more
     ;; permissive licenses.
     (license license:gpl3+)))
+
+(define-public ilmbase
+  (package
+    (name "ilmbase")
+    (version "2.2.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://savannah/openexr/ilmbase-"
+                                  version ".tar.gz"))
+              (sha256
+               (base32
+                "1izddjwbh1grs8080vmaix72z469qy29wrvkphgmqmcm0sv1by7c"))))
+    (build-system gnu-build-system)
+    (home-page "http://www.openexr.com/")
+    (synopsis "Utility C++ libraries for threads, maths, and exceptions")
+    (description
+     "IlmBase provides several utility libraries for C++.  Half is a class
+that encapsulates ILM's 16-bit floating-point format.  IlmThread is a thread
+abstraction.  Imath implements 2D and 3D vectors, 3x3 and 4x4 matrices,
+quaternions and other useful 2D and 3D math functions.  Iex is an
+exception-handling library.")
+    (license license:bsd-3)))
+
+(define-public openexr
+  (package
+    (name "openexr")
+    (version "2.2.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://savannah/openexr/openexr-"
+                                  version ".tar.gz"))
+              (sha256
+               (base32
+                "0ca2j526n4wlamrxb85y2jrgcv0gf21b3a19rr0gh4rjqkv1581n"))
+              (modules '((guix build utils)))
+              (snippet
+               '(substitute* (find-files "." "tmpDir\\.h")
+                  (("\"/var/tmp/\"")
+                   "\"/tmp/\"")))
+              (patches (list (search-patch "openexr-missing-samples.patch")))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (propagated-inputs
+     `(("ilmbase" ,ilmbase)                       ;used in public headers
+       ("zlib" ,zlib)))                           ;OpenEXR.pc reads "-lz"
+    (home-page "http://www.openexr.com")
+    (synopsis #f)
+    (description
+     "OpenEXR is a high dynamic-range (HDR) image file format developed for
+use in computer imaging applications.  The IlmImf libraries supports storage
+of the \"EXR\" file format for storing 16-bit floating-point images.")
+    (license license:bsd-3)))

gnu/packages/patches/openexr-missing-samples.patch

@@ -0,0 +1,23 @@
+This patch comments out tests that rely on files that are missing
+from the source tarball.
+
+--- openexr-2.2.0/IlmImfTest/testSampleImages.cpp	2015-02-25 16:19:21.565105625 +0100
++++ openexr-2.2.0/IlmImfTest/testSampleImages.cpp	2015-02-25 16:21:46.394128206 +0100
+@@ -162,16 +162,6 @@ testSampleImages (const std::string&)
+ 	compareImages (ILM_IMF_TEST_IMAGEDIR "comp_b44.exr",
+ 		       ILM_IMF_TEST_IMAGEDIR "comp_b44_piz.exr");
+ 
+-	compareImages (ILM_IMF_TEST_IMAGEDIR "comp_dwaa_v1.exr",
+-		       ILM_IMF_TEST_IMAGEDIR "comp_dwaa_piz.exr");
+-	compareImages (ILM_IMF_TEST_IMAGEDIR "comp_dwaa_v2.exr",
+-		       ILM_IMF_TEST_IMAGEDIR "comp_dwaa_piz.exr");
+-
+-	compareImages (ILM_IMF_TEST_IMAGEDIR "comp_dwab_v1.exr",
+-		       ILM_IMF_TEST_IMAGEDIR "comp_dwab_piz.exr");
+-	compareImages (ILM_IMF_TEST_IMAGEDIR "comp_dwab_v2.exr",
+-		       ILM_IMF_TEST_IMAGEDIR "comp_dwab_piz.exr");
+-
+ 
+ 	cout << "ok\n" << endl;
+     }
+