EEVEE-Next: Add Film and RenderBuffers module

This modules handles renderpasses allocation and filling. Also handles
blitting to viewport framebuffer and render result reading.

Changes against the old implementation:
- the filling of the renderpasses happens all at once requiring
  only 1 geometry pass.
- The filtering is optimized with weights precomputed on CPU and
  reuse of neighboor pixels.
- Only one accumulation buffer for renderpasses (no ping-pong).
- Accumulation happens in one pass for every passes using a single
  dispatch or fullscreen triangle pass.

TAA and history reprojection is not yet implemented.
AOVs support is present but with a 16 AOV limit for now.
Cryptomatte is not yet implemented.

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl b/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
index 0ccf06a9e14..71921d0477a 100644
--- a/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
+++ b/source/blender/draw/engines/eevee_next/shaders/eevee_nodetree_lib.glsl
@@ -245,6 +245,20 @@ float F_eta(float a, float b)
 }
 void output_aov(vec4 color, float value, uint hash)
 {
+#if defined(MAT_AOV_SUPPORT) && defined(GPU_FRAGMENT_SHADER)
+  for (int i = 0; i < AOV_MAX && i < aov_buf.color_len; i++) {
+    if (aov_buf.hash_color[i] == hash) {
+      imageStore(aov_color_img, ivec3(gl_FragCoord.xy, i), color);
+      return;
+    }
+  }
+  for (int i = 0; i < AOV_MAX && i < aov_buf.value_len; i++) {
+    if (aov_buf.hash_value[i] == hash) {
+      imageStore(aov_value_img, ivec3(gl_FragCoord.xy, i), vec4(value));
+      return;
+    }
+  }
+#endif
 }
 
 #ifdef EEVEE_MATERIAL_STUBS