From a43c7538b802c64ae2443fd8e355756948716e8b Mon Sep 17 00:00:00 2001 From: Iyad Ahmed Date: Fri, 21 May 2021 10:25:47 +0530 Subject: Eevee Wavelength Node Support This patch adds wavelength node support to Eevee, similar to how Eevee Blackbody node works, thus it is a little off from Cycles. Reviewed By: #eevee_viewport, fclem, brecht Differential Revision: https://developer.blender.org/D11326 --- source/blender/gpu/CMakeLists.txt | 1 + source/blender/gpu/intern/gpu_material_library.c | 7 +++++++ .../shaders/material/gpu_shader_material_wavelength.glsl | 15 +++++++++++++++ 3 files changed, 23 insertions(+) create mode 100644 source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl (limited to 'source/blender/gpu') diff --git a/source/blender/gpu/CMakeLists.txt b/source/blender/gpu/CMakeLists.txt index 2ff72266a64..f1ffd7827b8 100644 --- a/source/blender/gpu/CMakeLists.txt +++ b/source/blender/gpu/CMakeLists.txt @@ -275,6 +275,7 @@ data_to_c_simple(shaders/material/gpu_shader_material_anisotropic.glsl SRC) data_to_c_simple(shaders/material/gpu_shader_material_attribute.glsl SRC) data_to_c_simple(shaders/material/gpu_shader_material_background.glsl SRC) data_to_c_simple(shaders/material/gpu_shader_material_bevel.glsl SRC) +data_to_c_simple(shaders/material/gpu_shader_material_wavelength.glsl SRC) data_to_c_simple(shaders/material/gpu_shader_material_blackbody.glsl SRC) data_to_c_simple(shaders/material/gpu_shader_material_bright_contrast.glsl SRC) data_to_c_simple(shaders/material/gpu_shader_material_bump.glsl SRC) diff --git a/source/blender/gpu/intern/gpu_material_library.c b/source/blender/gpu/intern/gpu_material_library.c index 175facc0a8d..3c216c1a991 100644 --- a/source/blender/gpu/intern/gpu_material_library.c +++ b/source/blender/gpu/intern/gpu_material_library.c @@ -47,6 +47,7 @@ extern char datatoc_gpu_shader_material_anisotropic_glsl[]; extern char datatoc_gpu_shader_material_attribute_glsl[]; extern char datatoc_gpu_shader_material_background_glsl[]; extern char datatoc_gpu_shader_material_bevel_glsl[]; +extern char datatoc_gpu_shader_material_wavelength_glsl[]; extern char datatoc_gpu_shader_material_blackbody_glsl[]; extern char datatoc_gpu_shader_material_bright_contrast_glsl[]; extern char datatoc_gpu_shader_material_bump_glsl[]; @@ -191,6 +192,11 @@ static GPUMaterialLibrary gpu_shader_material_bevel_library = { .dependencies = {NULL}, }; +static GPUMaterialLibrary gpu_shader_material_wavelength_library = { + .code = datatoc_gpu_shader_material_wavelength_glsl, + .dependencies = {NULL}, +}; + static GPUMaterialLibrary gpu_shader_material_blackbody_library = { .code = datatoc_gpu_shader_material_blackbody_glsl, .dependencies = {NULL}, @@ -593,6 +599,7 @@ static GPUMaterialLibrary *gpu_material_libraries[] = { &gpu_shader_material_attribute_library, &gpu_shader_material_background_library, &gpu_shader_material_bevel_library, + &gpu_shader_material_wavelength_library, &gpu_shader_material_blackbody_library, &gpu_shader_material_bright_contrast_library, &gpu_shader_material_bump_library, diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl new file mode 100644 index 00000000000..2c5d38eabbe --- /dev/null +++ b/source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl @@ -0,0 +1,15 @@ +void node_wavelength(float wavelength, + sampler1DArray spectrummap, + float layer, + vec3 xyz_to_r, + vec3 xyz_to_g, + vec3 xyz_to_b, + out vec4 color) +{ + mat3 xyz_to_rgb = mat3(xyz_to_r, xyz_to_g, xyz_to_b); + float t = (wavelength - 380.0) / (780.0 - 380.0); + vec3 xyz = texture(spectrummap, vec2(t, layer)).rgb; + vec3 rgb = xyz * xyz_to_rgb; + rgb *= 1.0 / 2.52; /* Empirical scale from lg to make all comps <= 1. */ + color = vec4(clamp(rgb, 0.0, 1.0), 1.0); +} -- cgit v1.2.3