EEVEE: GLSL Renderpasses

Most of the renderpasses in EEVEE used post-processing on the CPU. For
final image rendering this is sufficient, but when we want to display
the data to the user we don't want to transfer to the CPU to do post
processing to then upload it back to the GPU to display the result.

This patch moves the renderpass postprocessing to a GLSL shader.

This is the first step to do, before we will enable the renderpasses in the viewport.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D6206

1 files changed, 18 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_private.h b/source/blender/draw/engines/eevee/eevee_private.h
index 41e38fd8437..b49328d90ab 100644
--- a/source/blender/draw/engines/eevee/eevee_private.h
+++ b/source/blender/draw/engines/eevee/eevee_private.h
@@ -271,6 +271,7 @@ typedef struct EEVEE_PassList {
   struct DRWPass *update_noise_pass;
   struct DRWPass *lookdev_glossy_pass;
   struct DRWPass *lookdev_diffuse_pass;
+  struct DRWPass *renderpass_pass;
 } EEVEE_PassList;
 
 typedef struct EEVEE_FramebufferList {
@@ -295,6 +296,7 @@ typedef struct EEVEE_FramebufferList {
   struct GPUFrameBuffer *screen_tracing_fb;
   struct GPUFrameBuffer *refract_fb;
   struct GPUFrameBuffer *mist_accum_fb;
+  struct GPUFrameBuffer *renderpass_fb;
   struct GPUFrameBuffer *ao_accum_fb;
   struct GPUFrameBuffer *velocity_resolve_fb;
 
@@ -341,6 +343,8 @@ typedef struct EEVEE_TextureList {
 
   struct GPUTexture *maxzbuffer;
 
+  struct GPUTexture *renderpass;
+
   struct GPUTexture *color; /* R16_G16_B16 */
   struct GPUTexture *color_double_buffer;
   struct GPUTexture *depth_double_buffer;
@@ -799,6 +803,10 @@ typedef struct EEVEE_PrivateData {
   float studiolight_glossy_clamp;
   float studiolight_filter_quality;
 
+  /* Renderpasses */
+  /* Bitmask containing the active render_passes */
+  eScenePassType render_passes;
+
   /** For rendering shadows. */
   struct DRWView *cube_views[6];
   /** For rendering probes. */
@@ -1039,6 +1047,16 @@ void EEVEE_mist_output_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata);
 void EEVEE_mist_output_accumulate(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata);
 void EEVEE_mist_free(void);
 
+/* eevee_renderpasses.c */
+void EEVEE_renderpasses_init(EEVEE_Data *vedata);
+void EEVEE_renderpasses_output_init(EEVEE_ViewLayerData *sldata,
+                                    EEVEE_Data *vedata,
+                                    uint tot_samples);
+void EEVEE_renderpasses_postprocess(EEVEE_ViewLayerData *sldata,
+                                    EEVEE_Data *vedata,
+                                    eScenePassType renderpass_type);
+void EEVEE_renderpasses_free(void);
+
 /* eevee_temporal_sampling.c */
 void EEVEE_temporal_sampling_reset(EEVEE_Data *vedata);
 int EEVEE_temporal_sampling_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata);