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, 7 insertions, 0 deletions

diff --git a/source/blender/gpu/intern/gpu_texture.cc b/source/blender/gpu/intern/gpu_texture.cc
index 65daa416cae..bec8b8a0df3 100644
--- a/source/blender/gpu/intern/gpu_texture.cc
+++ b/source/blender/gpu/intern/gpu_texture.cc
@@ -360,6 +360,13 @@ GPUTexture *GPU_texture_create_compressed_2d(
 
 GPUTexture *GPU_texture_create_from_vertbuf(const char *name, GPUVertBuf *vert)
 {
+#ifndef NDEBUG
+  /* Vertex buffers used for texture buffers must be flagged with:
+   * GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY. */
+  BLI_assert_msg(unwrap(vert)->extended_usage_ & GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY,
+                 "Vertex Buffers used for textures should have usage flag "
+                 "GPU_USAGE_FLAG_BUFFER_TEXTURE_ONLY.");
+#endif
   eGPUTextureFormat tex_format = to_texture_format(GPU_vertbuf_get_format(vert));
   Texture *tex = GPUBackend::get()->texture_alloc(name);