# This file is part of the FidelityFX SDK.
# 
# Copyright (C) 2024 Advanced Micro Devices, Inc.
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files(the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and /or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions :
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

set(OPTICALFLOW_BASE_ARGS
    -reflection -deps=gcc -DFFX_GPU=1)

set(OPTICALFLOW_PERMUTATION_ARGS
	-DFFX_OPTICALFLOW_OPTION_HDR_COLOR_INPUT={0,1}
	)

set(OPTICALFLOW_INCLUDE_ARGS
	"${FFX_GPU_PATH}"
	"${FFX_GPU_PATH}/opticalflow")

if (NOT OPTICALFLOW_SHADER_EXT)
    set(OPTICALFLOW_SHADER_EXT *)
endif()

file(GLOB OPTICALFLOW_SHADERS
    "shaders/opticalflow/ffx_opticalflow_prepare_luma_pass.${OPTICALFLOW_SHADER_EXT}"
    "shaders/opticalflow/ffx_opticalflow_compute_luminance_pyramid_pass.${OPTICALFLOW_SHADER_EXT}"
    "shaders/opticalflow/ffx_opticalflow_generate_scd_histogram_pass.${OPTICALFLOW_SHADER_EXT}"
    "shaders/opticalflow/ffx_opticalflow_compute_scd_divergence_pass.${OPTICALFLOW_SHADER_EXT}"
    "shaders/opticalflow/ffx_opticalflow_compute_optical_flow_advanced_pass_v5.${OPTICALFLOW_SHADER_EXT}"
    "shaders/opticalflow/ffx_opticalflow_filter_optical_flow_pass_v5.${OPTICALFLOW_SHADER_EXT}"
    "shaders/opticalflow/ffx_opticalflow_scale_optical_flow_advanced_pass_v5.${OPTICALFLOW_SHADER_EXT}"
)

# compile all the shaders
compile_shaders_with_depfile(
    "${FFX_SC_EXECUTABLE}"
    "${OPTICALFLOW_BASE_ARGS}" "${OPTICALFLOW_API_BASE_ARGS}" "${OPTICALFLOW_PERMUTATION_ARGS}" "${OPTICALFLOW_INCLUDE_ARGS}"
    "${OPTICALFLOW_SHADERS}" "${FFX_PASS_SHADER_OUTPUT_PATH}" OPTICALFLOW_PERMUTATION_OUTPUTS)

# add the header files they generate to the main list of dependencies
add_shader_output("${OPTICALFLOW_PERMUTATION_OUTPUTS}")