Metal: Minimum per-vertex stride, 3D texture size + Transform feedback GPUCapabilities expansion.

- Adding in compatibility paths to support minimum per-vertex strides for vertex formats. OpenGL supports a minimum stride of 1 byte, in Metal, this minimum stride is 4 bytes. Meaing a vertex format must be atleast 4-bytes in size.

- Replacing transform feedback compile-time check to conditional look-up, given TF is supported on macOS with Metal.

- 3D texture size safety check added as a general capability, rather than being in the gl backend only. Also required for Metal.

Authored by Apple: Michael Parkin-White

Ref T96261

Reviewed By: fclem

Maniphest Tasks: T96261

Differential Revision: https://developer.blender.org/D14510

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/gpu/intern/gpu_vertex_buffer_private.hh b/source/blender/gpu/intern/gpu_vertex_buffer_private.hh
index a7920bacaec..f20f6caf6de 100644
--- a/source/blender/gpu/intern/gpu_vertex_buffer_private.hh
+++ b/source/blender/gpu/intern/gpu_vertex_buffer_private.hh
@@ -31,6 +31,11 @@ class VertBuf {
   /** NULL indicates data in VRAM (unmapped) */
   uchar *data = nullptr;
 
+#ifndef NDEBUG
+  /** Usage including extended usage flags. */
+  GPUUsageType extended_usage_ = GPU_USAGE_STATIC;
+#endif
+
  protected:
   /** Usage hint for GL optimization. */
   GPUUsageType usage_ = GPU_USAGE_STATIC;
@@ -83,6 +88,11 @@ class VertBuf {
     }
   }
 
+  GPUUsageType get_usage_type() const
+  {
+    return usage_;
+  }
+
   virtual void update_sub(uint start, uint len, const void *data) = 0;
   virtual const void *read() const = 0;
   virtual void *unmap(const void *mapped_data) const = 0;