1 files changed, 73 insertions, 0 deletions
diff --git a/source/blender/gpu/metal/mtl_state.hh b/source/blender/gpu/metal/mtl_state.hh
new file mode 100644
index 00000000000..f2d85f9648b
--- /dev/null
+++ b/source/blender/gpu/metal/mtl_state.hh
@@ -0,0 +1,73 @@
+/** \file
+ * \ingroup gpu
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_utildefines.h"
+
+#include "GPU_state.h"
+#include "gpu_state_private.hh"
+
+namespace blender::gpu {
+
+/* Forward Declarations. */
+class MTLContext;
+
+/**
+ * State manager keeping track of the draw state and applying it before drawing.
+ * Metal Implementation.
+ **/
+class MTLStateManager : public StateManager {
+ public:
+ private:
+  /* Current state of the associated MTLContext.
+   * Avoids resetting the whole state for every change. */
+  GPUState current_;
+  GPUStateMutable current_mutable_;
+  MTLContext *context_;
+
+ public:
+  MTLStateManager(MTLContext *ctx);
+
+  void apply_state(void) override;
+  void force_state(void) override;
+
+  void issue_barrier(eGPUBarrier barrier_bits) override;
+
+  void texture_bind(Texture *tex, eGPUSamplerState sampler, int unit) override;
+  void texture_unbind(Texture *tex) override;
+  void texture_unbind_all(void) override;
+
+  void image_bind(Texture *tex, int unit) override;
+  void image_unbind(Texture *tex) override;
+  void image_unbind_all(void) override;
+
+  void texture_unpack_row_length_set(uint len) override;
+
+ private:
+  void set_write_mask(const eGPUWriteMask value);
+  void set_depth_test(const eGPUDepthTest value);
+  void set_stencil_test(const eGPUStencilTest test, const eGPUStencilOp operation);
+  void set_stencil_mask(const eGPUStencilTest test, const GPUStateMutable state);
+  void set_clip_distances(const int new_dist_len, const int old_dist_len);
+  void set_logic_op(const bool enable);
+  void set_facing(const bool invert);
+  void set_backface_culling(const eGPUFaceCullTest test);
+  void set_provoking_vert(const eGPUProvokingVertex vert);
+  void set_shadow_bias(const bool enable);
+  void set_blend(const eGPUBlend value);
+
+  void set_state(const GPUState &state);
+  void set_mutable_state(const GPUStateMutable &state);
+
+  /* METAL State utility functions. */
+  void mtl_state_init(void);
+  void mtl_depth_range(float near, float far);
+  void mtl_stencil_mask(unsigned int mask);
+  void mtl_stencil_set_func(eGPUStencilTest stencil_func, int ref, unsigned int mask);
+
+  MEM_CXX_CLASS_ALLOC_FUNCS("MTLStateManager")
+};
+
+}  // namespace blender::gpu