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, 2 insertions, 1 deletions

diff --git a/source/blender/draw/intern/draw_cache.c b/source/blender/draw/intern/draw_cache.c
index 4ff5745fc86..6537490c06c 100644
--- a/source/blender/draw/intern/draw_cache.c
+++ b/source/blender/draw/intern/draw_cache.c
@@ -826,7 +826,8 @@ GPUBatch *DRW_gpencil_dummy_buffer_get(void)
 {
   if (SHC.drw_gpencil_dummy_quad == NULL) {
     GPUVertFormat format = {0};
-    GPU_vertformat_attr_add(&format, "dummy", GPU_COMP_U8, 1, GPU_FETCH_INT);
+    /* NOTE: Use GPU_COMP_U32 to satisfy minimum 4-byte vertex stride for Metal backend. */
+    GPU_vertformat_attr_add(&format, "dummy", GPU_COMP_U32, 1, GPU_FETCH_INT);
     GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
     GPU_vertbuf_data_alloc(vbo, 4);