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, 9 insertions, 2 deletions

diff --git a/source/blender/editors/interface/interface_draw.c b/source/blender/editors/interface/interface_draw.c
index 285c82b0fb3..f2fa375aa09 100644
--- a/source/blender/editors/interface/interface_draw.c
+++ b/source/blender/editors/interface/interface_draw.c
@@ -57,6 +57,7 @@
 #include "GPU_immediate.h"
 #include "GPU_immediate_util.h"
 #include "GPU_matrix.h"
+#include "GPU_shader_shared.h"
 #include "GPU_state.h"
 
 #include "UI_interface.h"
@@ -1384,10 +1385,16 @@ void ui_draw_but_UNITVEC(uiBut *but,
   GPU_matrix_scale_1f(size);
 
   GPUBatch *sphere = GPU_batch_preset_sphere(2);
+  struct SimpleLightingData simple_lighting_data;
+  copy_v4_fl4(simple_lighting_data.color, diffuse[0], diffuse[1], diffuse[2], 1.0f);
+  copy_v3_v3(simple_lighting_data.light, light);
+  GPUUniformBuf *ubo = GPU_uniformbuf_create_ex(
+      sizeof(struct SimpleLightingData), &simple_lighting_data, __func__);
+
   GPU_batch_program_set_builtin(sphere, GPU_SHADER_SIMPLE_LIGHTING);
-  GPU_batch_uniform_4f(sphere, "color", diffuse[0], diffuse[1], diffuse[2], 1.0f);
-  GPU_batch_uniform_3fv(sphere, "light", light);
+  GPU_batch_uniformbuf_bind(sphere, "simple_lighting_data", ubo);
   GPU_batch_draw(sphere);
+  GPU_uniformbuf_free(ubo);
 
   /* Restore. */
   GPU_face_culling(GPU_CULL_NONE);