Compositor: Add support for shader C++ compilation

This is mostly stubs for now but they should be
ported overtime.

See the documentation for more info on this:
https://developer.blender.org/docs/features/gpu/tools/cpp_shader_compilation/

Splited from #144904

Pull Request: https://projects.blender.org/blender/blender/pulls/148261

source/blender/CMakeLists.txt

@@ -183,6 +183,7 @@ add_subdirectory(functions)
 add_subdirectory(makesdna)
 add_subdirectory(makesrna)
 add_subdirectory(compositor)
+add_subdirectory(compositor/shaders)
 
 if(WITH_BLENDER_THUMBNAILER)
   add_subdirectory(blendthumb)

source/blender/compositor/shaders/CMakeLists.txt

@@ -0,0 +1,136 @@
+# SPDX-FileCopyrightText: 2024 Blender Authors
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+set(INC_GLSL
+  .
+  ..
+  ./library
+  ../../gpu
+  ../../gpu/intern
+  ../../gpu/shaders
+  ../../gpu/shaders/common
+  ../../gpu/shaders/infos
+)
+set(SRC_GLSL_COMP
+# TODO: Port to C++ compilation
+#   compositor_alpha_crop.glsl
+#   compositor_bilateral_blur.glsl
+#   compositor_bokeh_blur_variable_size.glsl
+#   compositor_bokeh_blur.glsl
+#   compositor_bokeh_image.glsl
+#   compositor_box_mask.glsl
+#   compositor_compute_preview.glsl
+#   compositor_convert.glsl
+#   compositor_cryptomatte_image.glsl
+#   compositor_cryptomatte_matte.glsl
+#   compositor_cryptomatte_pick.glsl
+#   compositor_defocus_blur.glsl
+#   compositor_defocus_radius_from_depth.glsl
+#   compositor_defocus_radius_from_scale.glsl
+#   compositor_deriche_gaussian_blur_sum.glsl
+#   compositor_deriche_gaussian_blur.glsl
+#   compositor_despeckle.glsl
+#   compositor_directional_blur.glsl
+#   compositor_displace_anisotropic.glsl
+#   compositor_displace.glsl
+#   compositor_double_edge_mask_compute_boundary.glsl
+#   compositor_double_edge_mask_compute_gradient.glsl
+#   compositor_edge_filter.glsl
+#   compositor_ellipse_mask.glsl
+#   compositor_filter.glsl
+#   compositor_flip.glsl
+#   compositor_gamma_correct.glsl
+#   compositor_glare_bloom_downsample.glsl
+#   compositor_glare_bloom_upsample.glsl
+#   compositor_glare_ghost_accumulate.glsl
+#   compositor_glare_ghost_base.glsl
+#   compositor_glare_highlights.glsl
+#   compositor_glare_mix.glsl
+#   compositor_glare_simple_star_anti_diagonal_pass.glsl
+#   compositor_glare_simple_star_diagonal_pass.glsl
+#   compositor_glare_simple_star_horizontal_pass.glsl
+#   compositor_glare_simple_star_vertical_pass.glsl
+#   compositor_glare_streaks_accumulate.glsl
+#   compositor_glare_streaks_filter.glsl
+#   compositor_glare_sun_beams.glsl
+#   compositor_glare_write_glare_output.glsl
+#   compositor_glare_write_highlights_output.glsl
+#   compositor_horizontal_lens_distortion.glsl
+#   compositor_id_mask.glsl
+#   compositor_image_coordinates_normalized.glsl
+#   compositor_image_coordinates_pixel.glsl
+#   compositor_image_coordinates_uniform.glsl
+#   compositor_image_crop.glsl
+#   compositor_inpaint_compute_boundary.glsl
+#   compositor_inpaint_compute_region.glsl
+#   compositor_inpaint_fill_region.glsl
+#   compositor_jump_flooding.glsl
+#   compositor_keying_compute_image.glsl
+#   compositor_keying_compute_matte.glsl
+#   compositor_keying_extract_chroma.glsl
+#   compositor_keying_replace_chroma.glsl
+#   compositor_keying_screen.glsl
+#   compositor_keying_tweak_matte.glsl
+#   compositor_kuwahara_anisotropic_compute_structure_tensor.glsl
+#   compositor_kuwahara_anisotropic.glsl
+#   compositor_kuwahara_classic.glsl
+#   compositor_map_uv_anisotropic.glsl
+#   compositor_map_uv.glsl
+#   compositor_morphological_blur.glsl
+#   compositor_morphological_distance_feather.glsl
+#   compositor_morphological_distance_threshold.glsl
+#   compositor_morphological_distance.glsl
+#   compositor_morphological_step.glsl
+#   compositor_motion_blur_max_velocity_dilate.glsl
+#   compositor_motion_blur.glsl
+#   compositor_movie_distortion.glsl
+#   compositor_normalize.glsl
+#   compositor_pad.glsl
+#   compositor_parallel_reduction.glsl
+#   compositor_pixelate.glsl
+#   compositor_plane_deform_anisotropic.glsl
+#   compositor_plane_deform_mask.glsl
+#   compositor_plane_deform_motion_blur_mask.glsl
+#   compositor_plane_deform_motion_blur.glsl
+#   compositor_plane_deform.glsl
+#   compositor_premultiply_alpha.glsl
+#   compositor_radial_lens_distortion.glsl
+#   compositor_read_input.glsl
+#   compositor_realize_on_domain.glsl
+#   compositor_sample_pixel.glsl
+#   compositor_scale_variable.glsl
+#   compositor_smaa_blending_weight_calculation.glsl
+#   compositor_smaa_edge_detection.glsl
+#   compositor_smaa_neighborhood_blending.glsl
+#   compositor_split.glsl
+#   compositor_summed_area_table_compute_complete_blocks.glsl
+#   compositor_summed_area_table_compute_complete_x_prologues.glsl
+#   compositor_summed_area_table_compute_complete_y_prologues.glsl
+#   compositor_summed_area_table_compute_incomplete_prologues.glsl
+#   compositor_symmetric_blur_variable_size.glsl
+#   compositor_symmetric_blur.glsl
+#   compositor_symmetric_separable_blur_variable_size.glsl
+#   compositor_symmetric_separable_blur.glsl
+#   compositor_tone_map_photoreceptor.glsl
+#   compositor_tone_map_simple.glsl
+#   compositor_translate_wrapped.glsl
+#   compositor_van_vliet_gaussian_blur_sum.glsl
+#   compositor_van_vliet_gaussian_blur.glsl
+#   compositor_write_output.glsl
+#   compositor_z_combine_compute_mask.glsl
+#   compositor_z_combine_from_mask_depth.glsl
+#   compositor_z_combine_from_mask_image.glsl
+#   compositor_z_combine_simple_depth.glsl
+#   compositor_z_combine_simple_image.glsl
+)
+set(SRC_GLSL_LIB
+  library/gpu_shader_compositor_texture_utilities.glsl
+)
+# Compile shaders with shader code.
+if(WITH_GPU_SHADER_CPP_COMPILATION)
+  with_shader_cpp_compilation_config()
+  #compile_sources_as_cpp(compositor_cpp_shaders_comp "${SRC_GLSL_COMP}" "GPU_COMPUTE_SHADER")
+  # Only enable to make sure they compile on their own.
+  # Otherwise it creates a warning about `pragma once`.
+  compile_sources_as_cpp(compositor_cpp_shaders_lib "${SRC_GLSL_LIB}" "GPU_LIBRARY_SHADER")
+endif()

source/blender/compositor/shaders/library/gpu_shader_compositor_texture_utilities.glsl

@@ -2,6 +2,9 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
+#pragma once
+#include "gpu_shader_compat.hh"
+
 /* A shorthand for 1D textureSize with a zero LOD. */
 int texture_size(sampler1D sampler_1d)
 {