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# Copyright 2013 The Flutter Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
cmake_minimum_required(VERSION 3.21)
if(APPLE)
project(example LANGUAGES C CXX OBJC OBJCXX)
else()
project(example LANGUAGES C CXX)
endif()
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(PROJECT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(SOURCE_DIR ${PROJECT_DIR}/src)
set(THIRD_PARTY_DIR ${PROJECT_DIR}/third_party)
set(GENERATED_DIR ${PROJECT_DIR}/generated)
set(ASSETS_SOURCE_DIR ${PROJECT_DIR}/assets_src)
set(ASSETS_OUT_DIR ${PROJECT_DIR}/assets)
set(FLATBUFFERS_INCLUDE_DIR ${THIRD_PARTY_DIR}/impeller-cmake/third_party/flatbuffers/include)
if(WIN32)
add_compile_definitions(
WIN32_LEAN_AND_MEAN
NOMINMAX
UNICODE)
# Use the static MSVC runtime library everywhere because:
# 1. the dynamic runtime doesn't work with FML, and
# 2. the same runtime needs to be used everywhere.
# Set compile options directly instead of using the `MSVC_RUNTIME_LIBRARY`
# CMake property because setting said property in the GLOBAL scope doesn't
# work for some reason.
add_compile_options(
$<$<CONFIG:>:/MT>
$<$<CONFIG:Debug>:/MTd>
$<$<CONFIG:Release>:/MT>)
elseif(UNIX)
set(CXX_STANDARD_LIBRARY libc++)
endif()
# Dependency: impeller-cmake
add_subdirectory(third_party/impeller-cmake)
# Dependency: GLFW
option(GLFW_BUILD_EXAMPLES "" OFF)
option(GLFW_BUILD_TESTS "" OFF)
option(GLFW_BUILD_DOCS "" OFF)
option(GLFW_INSTALL "" OFF)
if(APPLE)
elseif(UNIX)
set(CMAKE_THREAD_LIBS_INIT "-lpthread")
endif()
add_subdirectory(third_party/glfw)
# Dependency: STB
add_library(stb STATIC "third_party/stb.cc")
# Dependency: Dear ImGui
include("imgui.cmake")
# Asset importer binary
add_subdirectory(third_party/assimp)
add_subdirectory(src/importer)
target_compile_options(assimp PRIVATE "-Wno-unused-function")
# Shaders
add_gles_shader_library(
NAME example
SHADERS
${FLUTTER_ENGINE_DIR}/impeller/fixtures/impeller.vert
${FLUTTER_ENGINE_DIR}/impeller/fixtures/impeller.frag
${SOURCE_DIR}/examples/mesh/mesh_example.vert
${SOURCE_DIR}/examples/mesh/mesh_example.frag
OUTPUT_DIR ${GENERATED_DIR}/shaders)
add_library(example_shader_lib STATIC
"${GENERATED_DIR}/shaders/gles/example_shaders_gles.c"
"${GENERATED_DIR}/shaders/impeller.vert.cc"
"${GENERATED_DIR}/shaders/impeller.frag.cc"
"${GENERATED_DIR}/shaders/mesh_example.vert.cc"
"${GENERATED_DIR}/shaders/mesh_example.frag.cc")
target_link_libraries(example_shader_lib PUBLIC impeller_aiks)
# Examples binary
add_subdirectory(src/examples)
add_executable(example
"src/main_gles.cc"
)
target_link_libraries(example PRIVATE glfw imgui examples)
# Import assets
import_model(
TARGET example
INPUTS ${ASSETS_SOURCE_DIR}/flutter_logo.fbx
OUTPUT_DIR ${ASSETS_OUT_DIR})
import_texture(
TARGET example
INPUTS
${ASSETS_SOURCE_DIR}/flutter_logo_BaseColor.png
${ASSETS_SOURCE_DIR}/flutter_logo_Normal.png
${ASSETS_SOURCE_DIR}/flutter_logo_OcclusionRoughnessMetallic.png
OUTPUT_DIR ${ASSETS_OUT_DIR})