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, 16 insertions, 2 deletions

diff --git a/source/blender/draw/intern/shaders/common_view_lib.glsl b/source/blender/draw/intern/shaders/common_view_lib.glsl
index e9912ba7d9a..b0d405165f2 100644
--- a/source/blender/draw/intern/shaders/common_view_lib.glsl
+++ b/source/blender/draw/intern/shaders/common_view_lib.glsl
@@ -1,5 +1,7 @@
-#define COMMON_VIEW_LIB
-#define DRW_RESOURCE_CHUNK_LEN 512
+/* Temporary until we fully make the switch. */
+#ifndef DRW_SHADER_SHARED_H
+
+#  define DRW_RESOURCE_CHUNK_LEN 512
 
 /* keep in sync with DRWManager.view_data */
 layout(std140) uniform viewBlock
@@ -22,6 +24,8 @@ layout(std140) uniform viewBlock
   vec4 CameraTexCoFactors;
 };
 
+#endif /* DRW_SHADER_SHARED_H */
+
 #define ViewNear (ViewVecs[0].w)
 #define ViewFar (ViewVecs[1].w)
 
@@ -141,6 +145,10 @@ flat in int resourceIDFrag;
 /* clang-format off */
 #if !defined(GPU_INTEL) && !defined(GPU_DEPRECATED_AMD_DRIVER) && !defined(OS_MAC) && !defined(INSTANCED_ATTR)
 /* clang-format on */
+
+/* Temporary until we fully make the switch. */
+#  ifndef DRW_SHADER_SHARED_H
+
 struct ObjectMatrices {
   mat4 drw_modelMatrix;
   mat4 drw_modelMatrixInverse;
@@ -150,17 +158,23 @@ layout(std140) uniform modelBlock
 {
   ObjectMatrices drw_matrices[DRW_RESOURCE_CHUNK_LEN];
 };
+#  endif /* DRW_SHADER_SHARED_H */
 
 #  define ModelMatrix (drw_matrices[resource_id].drw_modelMatrix)
 #  define ModelMatrixInverse (drw_matrices[resource_id].drw_modelMatrixInverse)
 
 #else /* GPU_INTEL */
+
+/* Temporary until we fully make the switch. */
+#  ifndef DRW_SHADER_SHARED_H
 /* Intel GPU seems to suffer performance impact when the model matrix is in UBO storage.
  * So for now we just force using the legacy path. */
 /* Note that this is also a workaround of a problem on osx (amd or nvidia)
  * and older amd driver on windows. */
 uniform mat4 ModelMatrix;
 uniform mat4 ModelMatrixInverse;
+#  endif /* DRW_SHADER_SHARED_H */
+
 #endif
 
 #define resource_handle (resourceChunk * DRW_RESOURCE_CHUNK_LEN + resource_id)