Add LibRaw cmake support.

Author: TurboGit

.gitmodules

@@ -14,3 +14,6 @@
 [submodule "src/tests/integration"]
 	path = src/tests/integration
 	url = https://github.com/darktable-org/darktable-tests.git
+[submodule "src/external/LibRaw"]
+	path = src/external/LibRaw
+	url = https://github.com/LibRaw/LibRaw.git

src/CMakeLists.txt

@@ -5,6 +5,7 @@ include(CheckCXXCompilerFlag)
 include(CheckCSourceCompiles)
 include(CheckCXXSymbolExists)
 
+
 #
 # Add files for libdarktable
 #
@@ -382,14 +383,17 @@ if(USE_HEIF)
   endif()
 endif()
 
+#  For now we use the LibRaw submodule
 if (USE_LIBRAW)
-    find_package(libraw 0.20.2)
-    if (libraw_FOUND)
-        list(APPEND LIBS ${libraw_LIBRARY})
-        add_definitions(-DHAVE_LIBRAW=1)
-        list(APPEND SOURCES "common/imageio_libraw.c")
-        set(DT_SUPPORTED_EXTENSIONS ${DT_SUPPORTED_EXTENSIONS} libraw CACHE INTERNAL "")
-    endif()
+#    find_package(libraw 0.20.2)
+#    if (libraw_FOUND)
+#        list(APPEND LIBS ${libraw_LIBRARY})
+#        add_definitions(-DHAVE_LIBRAW=1)
+#        list(APPEND SOURCES "common/imageio_libraw.c")
+#        set(DT_SUPPORTED_EXTENSIONS ${DT_SUPPORTED_EXTENSIONS} libraw CACHE INTERNAL "")
+#    endif()
+   add_definitions(-DHAVE_LIBRAW=1)
+   list(APPEND SOURCES "common/imageio_libraw.c")
 endif()
 
 if(USE_LENSFUN)
@@ -432,6 +436,10 @@ if (USE_ISOBMFF)
     # This must be manually enabled during exiv2 build and can be checked with
     # the EXV_ENABLE_BMFF symbol.
     check_cxx_symbol_exists(EXV_ENABLE_BMFF "exiv2/exiv2.hpp" HAVE_EXV_ENABLE_BMFF)
+    # ??? This needs fix as we bypass the check for actual exiv2 version
+    if(APPLE)
+      set(HAVE_EXV_ENABLE_BMFF 1)
+    endif()
     if(HAVE_EXV_ENABLE_BMFF)
       add_definitions(-DHAVE_LIBEXIV2_WITH_ISOBMFF=1)
       set(DT_SUPPORTED_EXTENSIONS ${DT_SUPPORTED_EXTENSIONS} cr3 CACHE INTERNAL "")
@@ -1033,3 +1041,13 @@ InstallDependencyFiles()
 
 # Tell CPack about the components and group the data components together (CPACK_COMPONENT_${COMPONENT_NAME_ALL_CAPS}_GROUP).
 set(CPACK_COMPONENTS_ALL DTApplication DTDebugSymbols DTDocuments)
+
+if (USE_LIBRAW)
+  set(LIBRAW_PATH "${CMAKE_CURRENT_SOURCE_DIR}/external/LibRaw" CACHE STRING "Relative path to libraw directory (default=CMAKE_CURRENT_SOURCE_DIR)")
+  set(ENABLE_EXAMPLES OFF CACHE BOOLEAN "")
+  set(DT_SUPPORTED_EXTENSIONS ${DT_SUPPORTED_EXTENSIONS} libraw CACHE INTERNAL "")
+
+  # LibRaw sub-module
+  add_subdirectory(external/LibRaw-cmake)
+  target_link_libraries(lib_darktable PRIVATE libraw::libraw)
+endif()

src/common/imageio_libraw.c

@@ -83,7 +83,7 @@ gboolean dt_libraw_lookup_makermodel(const char *maker, const char *model,
 
 dt_imageio_retval_t dt_imageio_open_libraw(dt_image_t *img, const char *filename, dt_mipmap_buffer_t *mbuf)
 {
-  int err;
+  int err = 0;
   int libraw_err = 0;
   if(!_supported_image(filename)) return DT_IMAGEIO_FILE_CORRUPTED;
   if(!img->exif_inited) (void)dt_exif_read(img, filename);
@@ -131,10 +131,10 @@ dt_imageio_retval_t dt_imageio_open_libraw(dt_image_t *img, const char *filename
   img->height = raw->sizes.raw_height;
 
   // Apply crop parameters
-  img->crop_x = raw->sizes.raw_inset_crop.cleft;
-  img->crop_y = raw->sizes.raw_inset_crop.ctop;
-  img->crop_width = raw->sizes.raw_width - raw->sizes.raw_inset_crop.cwidth - raw->sizes.raw_inset_crop.cleft;
-  img->crop_height = raw->sizes.raw_height - raw->sizes.raw_inset_crop.cheight - raw->sizes.raw_inset_crop.ctop;
+  img->crop_x = raw->sizes.raw_inset_crops[0].cleft;
+  img->crop_y = raw->sizes.raw_inset_crops[0].ctop;
+  img->crop_width = raw->sizes.raw_width - raw->sizes.raw_inset_crops[0].cwidth - raw->sizes.raw_inset_crops[0].cleft;
+  img->crop_height = raw->sizes.raw_height - raw->sizes.raw_inset_crops[0].cheight - raw->sizes.raw_inset_crops[0].ctop;
 
   // We can reuse the libraw filters property, it's already well-handled in dt.
   // It contains the BAYER filter pattern.

src/external/CMakeLists.txt

@@ -46,7 +46,7 @@ add_subdirectory(rawspeed ${DARKTABLE_LIBDIR}/rawspeed)
 # Copying rawspeed resources to where dt expects them
 add_custom_target("deploy" ALL)
 SET(RAWSPEED_DATADIR "${CMAKE_CURRENT_SOURCE_DIR}/rawspeed/data")
-add_custom_command(TARGET "deploy" PRE_BUILD  
+add_custom_command(TARGET "deploy" PRE_BUILD
   COMMAND ${CMAKE_COMMAND} -E make_directory ${DARKTABLE_DATADIR}/rawspeed/
   COMMAND ${CMAKE_COMMAND} -E copy ${RAWSPEED_DATADIR}/cameras.xml ${RAWSPEED_DATADIR}/showcameras.xsl ${DARKTABLE_DATADIR}/rawspeed/
 )

src/external/LibRaw

@@ -0,0 +1 @@
+* text=auto

src/external/LibRaw-cmake/.gitattributes

@@ -0,0 +1,33 @@
+name: CI
+
+on: [push, pull_request, workflow_dispatch]
+
+env:
+  LIBRAW_GIT: https://github.com/LibRaw/LibRaw.git
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        libraw_ref: ['0.20.2', 'master']
+    
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - run: git clone $LIBRAW_GIT -b ${{ matrix.libraw_ref }}
+      name: Clone LibRaw
+
+    - run: |
+        mkdir build
+        cd build
+        cmake -DENABLE_OPENMP=OFF -DLIBRAW_PATH=$(pwd)/../LibRaw ..
+        cmake --build .
+      name: Build LibRaw

src/external/LibRaw-cmake/.github/workflows/ci.yml

@@ -0,0 +1,2 @@
+/.project
+build