CMakeLists.txt

CMAKE_MINIMUM_REQUIRED(VERSION 3.9...3.22)
PROJECT(OpenGLSamples)

SET(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin CACHE INTERNAL "" FORCE)
SET(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/lib CACHE INTERNAL "" FORCE)
#
SET(OpenGL_GL_PREFERENCE "GLVND")

FIND_PACKAGE(PkgConfig QUIET)
FIND_PACKAGE(OpenMP QUIET)

######################################
#  All cmake build options.
######################################
#
OPTION(BUILD_WITH_COVERAGE "Enable profiling and coverage report analysis." OFF)
OPTION(BUILD_WITH_PROFILER "Enable profiling." OFF)
OPTION(BUILD_WITH_UBSAN "Enable Undefined Behavior Sanitizer." OFF)
OPTION(BUILD_WITH_ASAN "Enable AddressSanitizer." OFF)
OPTION(BUILD_WITH_PEDANTIC "Enable Pedantic Compilation" OFF)

IF(PKG_CONFIG_FOUND)
	MESSAGE(STATUS "Found pkg-config: ${PKG_CONFIG_EXECUTABLE} -- version ${PKG_CONFIG_VERSION_STRING}.")
	PKG_CHECK_MODULES(SDL2 QUIET sdl2)
ELSE()
	MESSAGE(ERROR "Required library not found")
ENDIF()

IF(OPENGL_FOUND)
	MESSAGE(STATUS "OpenGL found: ${OPENGL_LIBRARIES}.")
ENDIF()

IF(CMAKE_BUILD_TYPE MATCHES Release)
	MESSAGE(STATUS "Compile for release.")
	ADD_DEFINITIONS(-O3 -march=native)
	SET(SIMD_FLAGS "-ftree-vectorize -ftree-slp-vectorize")
ENDIF()
IF(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
	MESSAGE(STATUS "Compile for release with Debug.")
	ADD_DEFINITIONS(-O3 -march=native)
	ADD_DEFINITIONS(-O3 -g3)
ENDIF()
IF(CMAKE_BUILD_TYPE MATCHES Debug)
	MESSAGE(STATUS "Compile for debug.")
	ADD_DEFINITIONS(-O3 -march=native)
	ADD_DEFINITIONS(-g3 -O0)
ENDIF()

# AVX If supported
LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/cmake-modules")
FIND_PACKAGE(AVX)
##########################
SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${AVX_FLAGS}")
SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${AVX_FLAGS}")
SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${AVX_FLAGS}")

#
IF(BUILD_WITH_PEDANTIC)
	MESSAGE(STATUS "Using Pedantic Compilation")
	SET(PEDANTIC_COMPILE_FLAGS "-Wextra -Wall -pedantic")
	SET(PEDANTIC_COMPILE_FLAGS "${PEDANTIC_COMPILE_FLAGS} -Rpass=loop-vectorize -Rpass-missed=loop-vectorize -Rpass-analysis=loop-vectorize")
	SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${PEDANTIC_COMPILE_FLAGS}")
	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${PEDANTIC_COMPILE_FLAGS}")
ENDIF()

# ###########################################
# Backend libraries
# ###########################################
SET(INFOWARE_USE_OPENGL ON)
SET(INFOWARE_USE_X11 OFF)
SET(BUILD_WITH_OPENMP ON)
SET(MIMI_VULKAN_SUPPORT OFF)
SET(MIMI_TERMINAL_SUPPORT OFF)
SET(MIMI_OPENGL_SUPPORT ON)
SET(MIMI_WINDOW_SDL2_SUPPORT ON)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi EXCLUDE_FROM_ALL)
# Fragcore specific libraries
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/modules/image/imageloader EXCLUDE_FROM_ALL)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/modules/taskscheduler/TaskSch EXCLUDE_FROM_ALL)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/modules/geometryutil EXCLUDE_FROM_ALL)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/modules/audio EXCLUDE_FROM_ALL)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/modules/audio/openal EXCLUDE_FROM_ALL)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/modules/physic EXCLUDE_FROM_ALL)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/extern/nekomimi/extern/fragcore/modules/physic/bullet EXCLUDE_FROM_ALL)


# ##################################################
# Backend common logic for all OpenGL Samples
# ###################################################
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Common)

# ###################################
# OpenGL Samples
# ###################################
############### Finished ###############
########################################
# Basic Samples
# ###################################
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/StartupWindow)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Triangle)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Texture)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/AlphaClipping)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/PointLight)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Skybox)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Blending)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Instance)
# ###################################
# Scene Based Samples
# ###################################
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/NormalMapping)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Normal)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/MipMapVisual)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/ShadowMapping)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/ShadowPointLight)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/PhongBlinn)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Fog)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/MultiPass)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/AmbientOcclusion)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Panoramic)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/SkinnedMesh)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/VariableRateShading)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/FrustumCulling)

# ###################################
# Advanced Samples
# ###################################
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/SubSurfaceScattering)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/VideoPlayback)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Gouraud)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/SimpleOcean)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/ProjectedShadow)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Rigidbody)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Tessellation)


############## Work In Progress ####################
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Deferred)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/ModelBase)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/ModelViewer)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/SimpleReflection)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Forest)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/MeshShader)

#######################################
# Compute Shader Based Samples
#######################################
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Mandelbrot)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/ReactionDiffusion)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/ComputeGroupVisual)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/GameOfLife)

ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/MarchingCube)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/VectorField2D)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Irradiance)

############## Work In Progress ####################
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/InfiniteWorld)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/WindCoeff)
ADD_SUBDIRECTORY(${CMAKE_CURRENT_SOURCE_DIR}/Samples/Planet)


####################################
# Shader Source Files
####################################
FILE(GLOB_RECURSE GLSL_SOURCE_FILES
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.fs
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.frag
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.vs
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.vert
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.gs
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.geom
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.tese
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.tesc
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.comp
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.task
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.mesh
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.rgen
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.miss
	${CMAKE_CURRENT_SOURCE_DIR}/Shaders/*.rchit
)

####################################
# SPIR-V Compiler
####################################
FIND_PROGRAM(GLSLLANGVALIDATOR glslangValidator)
FIND_PROGRAM(GLSLC glslc)

FOREACH(GLSL ${GLSL_SOURCE_FILES})
	GET_FILENAME_COMPONENT(FILE_NAME ${GLSL} ABSOLUTE)


	#glslangValidator
	SET(SPIRV "${FILE_NAME}.spv")
	IF(GLSLLANGVALIDATOR)
		IF(CMAKE_BUILD_TYPE STREQUAL "Release")
			SET(SPIRV_BUILD_SETTINGS)
		ELSE()
			SET(SPIRV_BUILD_SETTINGS -g -gVS -Od)
		ENDIF()
		ADD_CUSTOM_COMMAND(
			OUTPUT ${SPIRV}
			COMMAND ${CMAKE_COMMAND} -E make_directory "${EXECUTABLE_OUTPUT_PATH}/Shaders/"
			COMMAND ${GLSLLANGVALIDATOR} --define-macro gl_InstanceID=gl_InstanceIndex --define-macro gl_VertexID=gl_VertexIndex  -I${CMAKE_CURRENT_SOURCE_DIR}/Shaders/common --target-env vulkan1.1 ${SPIRV_BUILD_SETTINGS} -o ${SPIRV} ${GLSL}
			DEPENDS ${GLSL})
	ELSEIF(GLSLC)
		IF(CMAKE_BUILD_TYPE STREQUAL "Release")
			SET(SPIRV_BUILD_SETTINGS -O)
		ELSE()
			SET(SPIRV_BUILD_SETTINGS -g -Od)
		ENDIF()

		ADD_CUSTOM_COMMAND(
			OUTPUT ${SPIRV}
			COMMAND ${CMAKE_COMMAND} -E make_directory "${EXECUTABLE_OUTPUT_PATH}/Shaders/"
			COMMAND ${GLSLC} -Dgl_InstanceID=gl_InstanceIndex -Dgl_VertexID=gl_VertexIndex  -I${CMAKE_CURRENT_SOURCE_DIR}/Shaders/common --target-spv=spv1.3 -x glsl ${SPIRV_BUILD_SETTINGS} -Werror --target-env=vulkan1.1 -o ${SPIRV} ${GLSL}
			DEPENDS ${GLSL})
	ENDIF()

	LIST(APPEND SPIRV_BINARY_FILES ${SPIRV})
ENDFOREACH(GLSL)

ADD_CUSTOM_TARGET(
	Shaders ALL
	DEPENDS ${SPIRV_BINARY_FILES}
)

## External Asset
ADD_CUSTOM_TARGET(
	DownloadAsset
	DEPENDS ${CMAKE_SOURCE_DIR}/asset/downloaded
)

ADD_CUSTOM_COMMAND(
	OUTPUT ${CMAKE_SOURCE_DIR}/asset/downloaded
	COMMAND ${CMAKE_COMMAND} -E make_directory  ${CMAKE_SOURCE_DIR}/asset/zip
	COMMAND python3 ${CMAKE_CURRENT_SOURCE_DIR}/download_asset.py ${CMAKE_SOURCE_DIR}/asset/
	COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_SOURCE_DIR}/asset/downloaded
)

# All shader files.
FILE(CREATE_LINK ${CMAKE_CURRENT_SOURCE_DIR}/Shaders ${CMAKE_CURRENT_BINARY_DIR}/Shaders SYMBOLIC)
FILE(CREATE_LINK ${CMAKE_CURRENT_SOURCE_DIR}/asset ${CMAKE_CURRENT_BINARY_DIR}/asset SYMBOLIC)

# Install Shaders.
INSTALL(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/Shaders DESTINATION bin)