GPUShaderCreateInfo for interface abstraction

This is a first part of the Shader Create Info system could be.

A shader create info provides a way to define shader structure, resources
and interfaces. This makes for a quick way to provide backend agnostic
binding informations while also making shader variations easy to declare.

- Clear source input (only one file). Cleans up the GPU api since we can create a
  shader from one descriptor
- Resources and interfaces are generated by the backend (much simpler than parsing).
- Bindings are explicit from position in the array.
- GPUShaderInterface becomes a trivial translation of enums and string copy.
- No external dependency to third party lib.
- Cleaner code, less fragmentation of resources in several libs.
- Easy to modify / extend at runtime.
- no parser involve, very easy to code.
- Does not hold any data, can be static and kept on disc.
- Could hold precompiled bytecode for static shaders.

This also includes a new global dependency system.
GLSL shaders can include other sources by using #pragma BLENDER_REQUIRE(...).

This patch already migrated several builtin shaders. Other shaders should be migrated
one at a time, and could be done inside master.

There is a new compile directive `WITH_GPU_SHADER_BUILDER` this is an optional
directive for linting shaders to increase turn around time.

What is remaining:
- pyGPU API {T94975}
- Migration of other shaders. This could be a community effort.

Reviewed By: jbakker

Maniphest Tasks: T94975

Differential Revision: https://developer.blender.org/D13360

1 files changed, 17 insertions, 7 deletions

diff --git a/source/blender/draw/intern/draw_manager.c b/source/blender/draw/intern/draw_manager.c
index 7365ebf59c2..276a8cc3a13 100644
--- a/source/blender/draw/intern/draw_manager.c
+++ b/source/blender/draw/intern/draw_manager.c
@@ -70,6 +70,7 @@
 #include "GPU_framebuffer.h"
 #include "GPU_immediate.h"
 #include "GPU_matrix.h"
+#include "GPU_shader_shared.h"
 #include "GPU_state.h"
 #include "GPU_uniform_buffer.h"
 #include "GPU_viewport.h"
@@ -2756,11 +2757,15 @@ void DRW_draw_depth_object(
   GPU_framebuffer_clear_depth(depth_fb, 1.0f);
   GPU_depth_test(GPU_DEPTH_LESS_EQUAL);
 
-  const float(*world_clip_planes)[4] = NULL;
-  if (RV3D_CLIPPING_ENABLED(v3d, rv3d)) {
+  struct GPUClipPlanes planes;
+  const bool use_clipping_planes = RV3D_CLIPPING_ENABLED(v3d, rv3d);
+  if (use_clipping_planes) {
     GPU_clip_distances(6);
     ED_view3d_clipping_local(rv3d, object->obmat);
-    world_clip_planes = rv3d->clip_local;
+    for (int i = 0; i < 6; i++) {
+      copy_v4_v4(planes.world[i], rv3d->clip_local[i]);
+    }
+    copy_m4_m4(planes.ModelMatrix, object->obmat);
   }
 
   drw_batch_cache_validate(object);
@@ -2782,14 +2787,19 @@ void DRW_draw_depth_object(
       BLI_task_graph_work_and_wait(task_graph);
       BLI_task_graph_free(task_graph);
 
-      const eGPUShaderConfig sh_cfg = world_clip_planes ? GPU_SHADER_CFG_CLIPPED :
-                                                          GPU_SHADER_CFG_DEFAULT;
+      const eGPUShaderConfig sh_cfg = use_clipping_planes ? GPU_SHADER_CFG_CLIPPED :
+                                                            GPU_SHADER_CFG_DEFAULT;
       GPU_batch_program_set_builtin_with_config(batch, GPU_SHADER_3D_DEPTH_ONLY, sh_cfg);
-      if (world_clip_planes != NULL) {
-        GPU_batch_uniform_4fv_array(batch, "WorldClipPlanes", 6, world_clip_planes);
+
+      GPUUniformBuf *ubo = NULL;
+      if (use_clipping_planes) {
+        ubo = GPU_uniformbuf_create_ex(sizeof(struct GPUClipPlanes), &planes, __func__);
+        GPU_batch_uniformbuf_bind(batch, "clipPlanes", ubo);
       }
 
       GPU_batch_draw(batch);
+      GPU_uniformbuf_free(ubo);
+
     } break;
     case OB_CURVE:
     case OB_SURF: