[Issue #471] implement the C++ reader for pixels.

.gitignore

@@ -20,6 +20,7 @@ package-info.java
 *.sql
 *.log
 *.txt
+!*/CMakeLists.txt
 *.csv
 resources/*.xml
 *.so

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "cpp/pixels-reader"]
+	path = cpp/pixels-reader
+	url = https://github.com/yuly16/pixels-reader-cxx
+[submodule "cpp/duckdb"]
+	path = cpp/duckdb
+	url = https://github.com/yuly16/duckdb

cpp/.gitignore

@@ -0,0 +1,4 @@
+build/
+plot
+.idea
+.vscode

cpp/CMakeLists.txt

@@ -0,0 +1,37 @@
+cmake_minimum_required(VERSION 2.8.12)
+
+# Set extension name here
+set(TARGET_NAME pixels)
+
+set(EXTENSION_NAME ${TARGET_NAME}_extension)
+project(${TARGET_NAME})
+include_directories(include)
+
+set(EXTENSION_SOURCES
+        pixels_extension.cpp
+        PixelsScanFunction.cpp
+        )
+add_library(${EXTENSION_NAME} STATIC ${EXTENSION_SOURCES})
+
+
+include_directories(pixels-reader/pixels-common/include)
+include_directories(pixels-reader/pixels-core/include)
+include_directories(${CMAKE_CURRENT_BINARY_DIR}/pixels-reader)
+
+add_subdirectory(pixels-reader)
+
+
+target_link_libraries(
+        ${EXTENSION_NAME}
+        pixels-common
+        pixels-core
+)
+
+set(PARAMETERS "-warnings")
+build_loadable_extension(${TARGET_NAME} ${PARAMETERS} ${EXTENSION_SOURCES})
+
+install(
+  TARGETS ${EXTENSION_NAME} pixels-core pixels-common
+  EXPORT "${DUCKDB_EXPORT_SET}"
+  LIBRARY DESTINATION "${INSTALL_LIB_DIR}"
+  ARCHIVE DESTINATION "${INSTALL_LIB_DIR}")

cpp/Makefile

@@ -1,10 +1,49 @@
-all: PixelsCacheReader
+.PHONY: all clean debug release pull update
 
-PixelsCacheReader: PixelsCacheReader.cc MemoryMappedFile
-	$(CXX) -shared -fPIC $@.cc -o lib_pixels.so -I/usr/lib/jvm/java-1.8.0-openjdk-amd64/include/ -I/usr/lib/jvm/java-8-openjdk-amd64/include/linux/
+all: release
 
-MemoryMappedFile:
-	$(CXX) -c $@.cc
+MKFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
+PROJ_DIR := $(dir $(MKFILE_PATH))
+
+OSX_BUILD_UNIVERSAL_FLAG=
+ifeq (${OSX_BUILD_UNIVERSAL}, 1)
+	OSX_BUILD_UNIVERSAL_FLAG=-DOSX_BUILD_UNIVERSAL=1
+endif
+ifeq (${STATIC_LIBCPP}, 1)
+	STATIC_LIBCPP=-DSTATIC_LIBCPP=TRUE
+endif
+
+ifeq ($(GEN),ninja)
+	GENERATOR=-G "Ninja"
+	FORCE_COLOR=-DFORCE_COLORED_OUTPUT=1
+endif
+
+BUILD_FLAGS=-DEXTENSION_STATIC_BUILD=1 -DBUILD_TPCH_EXTENSION=1 -DBUILD_BENCHMARKS=1 -DBUILD_PARQUET_EXTENSION=1 ${OSX_BUILD_UNIVERSAL_FLAG} ${STATIC_LIBCPP}
+
+CLIENT_FLAGS :=
+
+# These flags will make DuckDB build the extension
+EXTENSION_FLAGS=-DDUCKDB_OOT_EXTENSION_NAMES="pixels" -DDUCKDB_OOT_EXTENSION_PIXELS_PATH="$(PROJ_DIR)" -DDUCKDB_OOT_EXTENSION_PIXELS_SHOULD_LINK="TRUE" -DDUCKDB_OOT_EXTENSION_PIXELS_INCLUDE_PATH="$(PROJ_DIR)include"
+
+pull:
+	git submodule init
+	git submodule update --recursive --remote
+
+update:
+	git submodule update --remote --merge
 
 clean:
-	rm -rf ./lib_pixels.so ./*.o
+	rm -rf build
+	rm -rf testext
+	cd duckdb && make clean
+
+# Main build
+debug:
+	mkdir -p  build/debug && \
+	cmake $(GENERATOR) $(FORCE_COLOR) $(EXTENSION_FLAGS) ${CLIENT_FLAGS} -DEXTENSION_STATIC_BUILD=1 -DCMAKE_BUILD_TYPE=Debug ${BUILD_FLAGS} -S ./duckdb/ -B build/debug && \
+	cmake --build build/debug --config Debug
+
+release:
+	mkdir -p build/release && \
+	cmake $(GENERATOR) $(FORCE_COLOR) $(EXTENSION_FLAGS) ${CLIENT_FLAGS} -DEXTENSION_STATIC_BUILD=1 -DCMAKE_BUILD_TYPE=Release ${BUILD_FLAGS} -S ./duckdb/ -B build/release && \
+	cmake --build build/release --config Release