Overlay Engine: Refactor & Cleanup

This is the unification of all overlays into one overlay engine as described in T65347.

I went over all the code making it more future proof with less hacks and removing old / not relevent parts.

Goals / Acheivements:
- Remove internal shader usage (only drw shaders)
- Remove viewportSize and viewportSizeInv and put them in gloabl ubo
- Fixed some drawing issues: Missing probe option and Missing Alt+B clipping of some shader
- Remove old (legacy) shaders dependancy (not using view UBO).
- Less shader variation (less compilation time at first load and less patching needed for vulkan)
- removed some geom shaders when I could
- Remove static e_data (except shaders storage where it is OK)
- Clear the way to fix some anoying limitations (dithered transparency, background image compositing etc...)
- Wireframe drawing now uses the same batching capabilities as workbench & eevee (indirect drawing).
- Reduced complexity, removed ~3000 Lines of code in draw (also removed a lot of unused shader in GPU).
- Post AA to avoid complexity and cost of MSAA.

Remaining issues:
- ~~Armature edits, overlay toggles, (... others?) are not refreshing viewport after AA is complete~~
- FXAA is not the best for wires, maybe investigate SMAA
- Maybe do something more temporally stable for AA.
- ~~Paint overlays are not working with AA.~~
- ~~infront objects are difficult to select.~~
- ~~the infront wires sometimes goes through they solid counterpart (missing clear maybe?) (toggle overlays on-off when using infront+wireframe overlay in solid shading)~~

Note: I made some decision to change slightly the appearance of some objects to simplify their drawing. Namely the empty arrows end (which is now hollow/wire) and distance points of the cameras/spots being done by lines.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D6296

1 files changed, 0 insertions, 60 deletions

diff --git a/source/blender/draw/modes/shaders/object_particle_prim_vert.glsl b/source/blender/draw/modes/shaders/object_particle_prim_vert.glsl
deleted file mode 100644
index 46aceb245f4..00000000000
--- a/source/blender/draw/modes/shaders/object_particle_prim_vert.glsl
+++ /dev/null
@@ -1,60 +0,0 @@
-
-uniform bool screen_space;
-uniform float draw_size;
-uniform vec3 color;
-uniform sampler1D ramp;
-
-/* ---- Instantiated Attrs ---- */
-in vec3 inst_pos;
-in int axis;
-
-/* ---- Per instance Attrs ---- */
-in vec3 pos;
-in vec4 rot;
-in float val;
-
-flat out vec4 finalColor;
-
-vec3 rotate(vec3 vec, vec4 quat)
-{
-  /* The quaternion representation here stores the w component in the first index */
-  return vec + 2.0 * cross(quat.yzw, cross(quat.yzw, vec) + quat.x * vec);
-}
-
-void main()
-{
-  if (screen_space) {
-    gl_Position = ViewMatrix * (ModelMatrix * vec4(pos, 1.0));
-    gl_Position.xyz += inst_pos * draw_size;
-    gl_Position = ProjectionMatrix * gl_Position;
-  }
-  else {
-    float size = draw_size;
-
-    if (axis > -1) {
-      size *= 2;
-    }
-
-    vec3 pos_rot = pos + rotate(inst_pos * size, rot);
-    gl_Position = point_object_to_ndc(pos_rot);
-  }
-
-#ifdef USE_AXIS
-  if (axis == 0) {
-    finalColor = vec4(1.0, 0.0, 0.0, 1.0);
-  }
-  else if (axis == 1) {
-    finalColor = vec4(0.0, 1.0, 0.0, 1.0);
-  }
-  else {
-    finalColor = vec4(0.0, 0.0, 1.0, 1.0);
-  }
-#else
-  if (val < 0.0) {
-    finalColor = vec4(color, 1.0);
-  }
-  else {
-    finalColor = vec4(texture(ramp, val).rgb, 1.0);
-  }
-#endif
-}