EEVEE: Implementation of volume rendering

This adds the transparency and volume handling in the deferred
render pipeline.

Implementation is still unfinished.

To have better naming convention, I renamed object shader to surface.

1 files changed, 29 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/eevee_surface_deferred_frag.glsl b/source/blender/draw/engines/eevee/shaders/eevee_surface_deferred_frag.glsl
new file mode 100644
index 00000000000..d120baa12df
--- /dev/null
+++ b/source/blender/draw/engines/eevee/shaders/eevee_surface_deferred_frag.glsl
@@ -0,0 +1,29 @@
+
+#pragma BLENDER_REQUIRE(common_view_lib.glsl)
+#pragma BLENDER_REQUIRE(common_math_lib.glsl)
+#pragma BLENDER_REQUIRE(eevee_surface_lib.glsl)
+#pragma BLENDER_REQUIRE(eevee_gbuffer_lib.glsl)
+#pragma BLENDER_REQUIRE(eevee_nodetree_eval_lib.glsl)
+
+layout(location = 0) out uvec4 out_diffuse_data;     /* Diffuse BSDF, BSSSDF, Translucency. */
+layout(location = 1) out uvec2 out_reflection_data;  /* Glossy BSDF. */
+layout(location = 2) out uvec4 out_refraction_data;  /* Refraction BSDF. */
+layout(location = 3) out uvec4 out_volume_data;      /* Volume Emission, Absorption, Scatter. */
+layout(location = 4) out vec4 out_emission_data;     /* Emission. */
+layout(location = 5) out vec4 out_transparency_data; /* Transparent BSDF, Holdout. */
+
+SurfaceData g_surf;
+
+void main(void)
+{
+  g_surf = init_from_interp();
+
+  nodetree_eval(g_surf.N);
+
+  out_diffuse_data = gbuffer_store_diffuse_data(g_diffuse_data);
+  out_reflection_data = gbuffer_store_reflection_data(g_reflection_data);
+  out_refraction_data = gbuffer_store_refraction_data(g_refraction_data);
+  out_volume_data = gbuffer_store_volume_data(g_volume_data);
+  out_emission_data = gbuffer_store_emission_data(g_emission_data);
+  out_transparency_data = gbuffer_store_transparency_data(g_transparency_data);
+}
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