GPU: Add placeholder for Vulkan backend.

This patch adds a placeholder for the vulkan backend.
When activated (`WITH_VULKAN_BACKEND=On` and `--gpu-backend vulkan`)
it might open a blender screen, but nothing should be visible as
none of the functions are implemented or otherwise crash on a nullptr.

This is expected as this is just a placeholder. The goal is to add shader compilation
+validation to this backend as one of the next steps so we can validate
changes to existing shaders on OpenGL, Metal and Vulkan at the same time.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D16338

1 files changed, 33 insertions, 0 deletions

diff --git a/source/blender/gpu/CMakeLists.txt b/source/blender/gpu/CMakeLists.txt
index 58b1cd0a50b..bfbbf1be225 100644
--- a/source/blender/gpu/CMakeLists.txt
+++ b/source/blender/gpu/CMakeLists.txt
@@ -12,6 +12,7 @@ endif()
 set(INC
   .
   intern
+  vulkan
   metal
   opengl
   ../blenkernel
@@ -184,6 +185,34 @@ set(OPENGL_SRC
   opengl/gl_vertex_buffer.hh
 )
 
+set(VULKAN_SRC
+  vulkan/vk_backend.cc
+  vulkan/vk_batch.cc
+  vulkan/vk_context.cc
+  vulkan/vk_drawlist.cc
+  vulkan/vk_framebuffer.cc
+  vulkan/vk_index_buffer.cc
+  vulkan/vk_query.cc
+  vulkan/vk_shader.cc
+  vulkan/vk_storage_buffer.cc
+  vulkan/vk_texture.cc
+  vulkan/vk_uniform_buffer.cc
+  vulkan/vk_vertex_buffer.cc
+
+  vulkan/vk_backend.hh
+  vulkan/vk_batch.hh
+  vulkan/vk_context.hh
+  vulkan/vk_drawlist.hh
+  vulkan/vk_framebuffer.hh
+  vulkan/vk_index_buffer.hh
+  vulkan/vk_query.hh
+  vulkan/vk_shader.hh
+  vulkan/vk_storage_buffer.hh
+  vulkan/vk_texture.hh
+  vulkan/vk_uniform_buffer.hh
+  vulkan/vk_vertex_buffer.hh
+)
+
 set(METAL_SRC
   metal/mtl_backend.mm
   metal/mtl_batch.mm
@@ -235,6 +264,10 @@ if(WITH_OPENGL)
   list(APPEND SRC ${OPENGL_SRC})
 endif()
 
+if(WITH_VULKAN_BACKEND)
+  list(APPEND SRC ${VULKAN_SRC})
+endif()
+
 if(WITH_METAL_BACKEND)
   list(APPEND SRC ${METAL_SRC})
 endif()