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/**************************************************************************
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* Copyright 2010 Luca Barbieri
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************/
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#ifndef D3D1XSTUTIL_H_
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#define D3D1XSTUTIL_H_
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#include <unordered_map>
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#include <unordered_set>
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#include <tr1/unordered_map>
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#include <tr1/unordered_set>
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#define WIN32_LEAN_AND_MEAN
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#include "galliumdxgi.h"
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#include <d3dcommon.h>
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#include "util/u_atomic.h"
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#include "pipe/p_format.h"
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#include "os/os_thread.h"
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#define D3D_PRIMITIVE_TOPOLOGY_COUNT 65
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extern unsigned d3d_to_pipe_prim[D3D_PRIMITIVE_TOPOLOGY_COUNT];
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#define D3D_PRIMITIVE_COUNT 40
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extern unsigned d3d_to_pipe_prim_type[D3D_PRIMITIVE_COUNT];
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/* NOTE: this _depends_ on the vtable layout of the C++ compiler to be
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* binary compatible with Windows.
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* Furthermore some absurd vtable layout likely won't work at all, since
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* we perform some casts which are probably not safe by the C++ standard.
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* In particular, the GNU/Linux/Itanium/clang ABI and Microsoft ABIs will work,
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* If in doubt, just switch to the latest version of a widely used C++ compiler.
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* DESIGN of the Gallium COM implementation
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* This state tracker uses somewhat unusual C++ coding patterns,
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* to implement the COM interfaces required by Direct3D.
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* While it may seem complicated, the effect is that the result
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* generally behaves as intuitively as possible: in particular pointer
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* casts very rarely change the pointer value (only for secondary
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* DXGI/Gallium interfaces)
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* Implementing COM is on first sight very easy: after all, it just
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* consists of a reference count, and a dynamic_cast<> equivalent.
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* However, implementing objects with multiple interfaces is actually
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* The issue is that the interface pointers can't be equal, since this
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* would place incompatible constraints on the vtable layout and thus
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* multiple inheritance (and the subobjects the C++ compiler creates
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* with it) must be correctly used.
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* Furthermore, we must have a single reference count, which means
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* that a naive implementation won't work, and it's necessary to either
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* use virtual inheritance, or the "mixin inheritance" model we use.
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* This solution aims to achieve the following object layout:
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* 0: pointer to vtable for primary interface
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* ... vtable pointers for secondary interfaces
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* ... implementation of subclasses assuming secondary interfaces
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* This allows us to cast pointers by just reinterpreting the value in
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* To achieve this, *all* non-leaf classes must have their parent
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* or the base COM interface as a template parameter, since derived
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* classes may need to change that to support an interface derived
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* from the one implemented by the superclass.
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* Note however, that you can cast without regard to the template
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* parameter, because only the vtable layout depends on it, since
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* interfaces have no data members.
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* For this to work, DON'T USE VIRTUAL FUNCTIONS except to implement
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* interfaces, since the vtable layouts would otherwise be mismatched.
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* An exception are virtual functions called only from other virtual functions,
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* which is currently only used for the virtual destructor.
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* The base class is GalliumComObject<IFoo>, which implements the
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* IUnknown interface, and inherits IFoo.
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* To support multiple inheritance, we insert GalliumMultiComObject,
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* which redirects the secondary interfaces to the GalliumComObject
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* Gallium(Multi)PrivateDataComObject is like ComObject but also
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* implements the Get/SetPrivateData functions present on several
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* D3D/DXGI interfaces.
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* Example class hierarchy:
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* GalliumComObject<IDuck>
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* (non-instantiable, only implements IUnknown)
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* GalliumAnimal<IDuck>
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* (non-instantiable, only implements IAnimal)
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* GalliumMultiComObject<GalliumDuck, IWheeledVehicle> <- IWheeledVehicle <- IVehicle <- IUnknown (second version)
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* (non-instantiable, only implements IDuck and the IUnknown of IWheeledVehicle)
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* GalliumDuckOnWheels
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* This will produce the desired layout.
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* Note that GalliumAnimal<IFoo>* is safely castable to GalliumAnimal<IBar>*
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* by reinterpreting, as long as non-interface virtual functions are not used,
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* and that you only call interface functions for the superinterface of IBar
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* that the object actually implements.
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* Instead, if GalliumDuck where to inherit both from GalliumAnimal
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* and IDuck, then (IDuck*)gallium_duck and (IAnimal*)gallium_duck would
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* have different pointer values, which the "base class as template parameter"
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* The price we pay is that you MUST NOT have virtual functions other than those
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* implementing interfaces (except for leaf classes) since the position of these
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* would depend on the base interface.
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* As mentioned above, virtual functions only called from interface functions
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* are an exception, currently used only for the virtual destructor.
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* If you want virtual functions anyway , put them in a separate interface class,
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* multiply inherit from that and cast the pointer to that interface.
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* You CAN however have virtual functions on any class which does not specify
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* his base as a template parameter, or where you don't need to change the
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* template base interface parameter by casting.
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* --- The magic QueryInterface "delete this" trick ---
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* When the reference count drops to 0, we must delete the class.
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* The problem is, that we must call the right virtual destructor (i.e. on the right class).
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* However, we would like to be able to call release() and nonatomic_release()
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* non-virtually for performance (also, the latter cannot be called virtually at all, since
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* IUnknown does not offer it).
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* The naive solution would be to just add a virtual destructor and rely on it.
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* However, this doesn't work due to the fact that as described above we perform casets
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* with are unsafe regarding vtable layout.
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* In particular, consider the case where we try to delete GalliumComObject<ID3D11Texture2D>
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* with a pointer to GalliumComObject<ID3D11Resource>.
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* Since we think that this is a GalliumComObject<ID3D11Resource>, we'll look for the
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* destructor in the vtable slot immediately after the ID3D11Resource vtable, but this is
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* actually an ID3D11Texture2D function implemented by the object!
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* So, we must put the destructor somewhere else.
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* We could add it as a data member, but it would be awkward and it would bloat the
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* Thus, we use this trick: we reuse the vtable slot for QueryInterface, which is always at the
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* To do so, we define a special value for the first pointer argument, that triggers a
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* In addition to that, we add a virtual destructor to GalliumComObject.
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* That virtual destructor will be called by QueryInterface, and since that is a virtual
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* function, it will know the correct place for the virtual destructor.
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* QueryInterface is already slow due to the need to compare several GUIDs, so the
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* additional pointer test should not be significant.
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* Of course the ideal solution would be telling the C++ compiler to put the
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* destructor it in a negative vtable slot, but unfortunately GCC doesn't support that
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* yet, and this method is almost as good as that.
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#define COM_INTERFACE(intf, base) \
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struct com_traits<intf> \
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static REFIID iid() {return IID_##intf;} \
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static inline bool is_self_or_ancestor(REFIID riid) {return riid == iid() || com_traits<base>::is_self_or_ancestor(riid);} \
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struct com_traits<IUnknown>
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static REFIID iid() {return IID_IUnknown;}
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static inline bool is_self_or_ancestor(REFIID riid) {return riid == iid();}
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#define __uuidof(T) (com_traits<T>::iid())
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refcnt_t(unsigned v = 1)
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p_atomic_inc((int32_t*)&refcnt);
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if(p_atomic_dec_zero((int32_t*)&refcnt))
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void nonatomic_add_ref()
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p_atomic_inc((int32_t*)&refcnt);
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unsigned nonatomic_release()
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if(p_atomic_dec_zero((int32_t*)&refcnt))
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#if defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8)
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/* this should be safe because atomic ops are full memory barriers, and thus a sequence that does:
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* should never be reorderable (as seen from another CPU) to:
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* since one of the ops is atomic.
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* If this weren't the case, a CPU could incorrectly destroy an object manipulated in that way by another one.
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uint32_t atomic_refcnt;
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uint32_t nonatomic_refcnt;
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dual_refcnt_t(unsigned v = 1)
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nonatomic_refcnt = 0;
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if(sizeof(void*) == 8)
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return *(volatile uint64_t*)&refcnt == 0ULL;
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while(!__sync_bool_compare_and_swap(&refcnt, v, v));
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//printf("%p add_ref at %u %u\n", this, atomic_refcnt, nonatomic_refcnt);
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p_atomic_inc((int32_t*)&atomic_refcnt);
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return atomic_refcnt + nonatomic_refcnt;
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//printf("%p release at %u %u\n", this, atomic_refcnt, nonatomic_refcnt);
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if(p_atomic_dec_zero((int32_t*)&atomic_refcnt) && !nonatomic_refcnt && is_zero())
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unsigned v = atomic_refcnt + nonatomic_refcnt;
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void nonatomic_add_ref()
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//printf("%p nonatomic_add_ref at %u %u\n", this, atomic_refcnt, nonatomic_refcnt);
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unsigned nonatomic_release()
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//printf("%p nonatomic_release at %u %u\n", this, atomic_refcnt, nonatomic_refcnt);
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if(!--nonatomic_refcnt)
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__sync_synchronize();
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if(!atomic_refcnt && is_zero())
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// this will result in atomic operations being used while they could have been avoided
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#warning Compile for 586+ using GCC to improve the performance of the Direct3D 10/11 state tracker
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typedef refcnt_t dual_refcnt_t;
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#define IID_MAGIC_DELETE_THIS (*(const IID*)((intptr_t)-(int)(sizeof(IID) - 1)))
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template<typename Base = IUnknown, typename RefCnt = refcnt_t>
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struct GalliumComObject : public Base
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/* DO NOT CALL this from externally called non-virtual functions in derived classes, since
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* the vtable position depends on the COM interface being implemented
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virtual ~GalliumComObject()
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inline ULONG add_ref()
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return refcnt.add_ref();
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inline ULONG release()
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ULONG v = refcnt.release();
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/* this will call execute "delete this", using the correct vtable slot for the destructor */
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/* see the initial comment for an explaination of this magic trick */
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this->QueryInterface(IID_MAGIC_DELETE_THIS, 0);
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inline void nonatomic_add_ref()
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refcnt.nonatomic_add_ref();
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inline void nonatomic_release()
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if(!refcnt.nonatomic_release())
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/* this will execute "delete this", using the correct vtable slot for the destructor */
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/* see the initial comment for an explaination of this magic trick */
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this->QueryInterface(IID_MAGIC_DELETE_THIS, 0);
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inline HRESULT query_interface(REFIID riid, void **ppvObject)
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if(com_traits<Base>::is_self_or_ancestor(riid))
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// must be the virtual AddRef, since it is overridden by some classes
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return E_NOINTERFACE;
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virtual ULONG STDMETHODCALLTYPE AddRef()
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virtual ULONG STDMETHODCALLTYPE Release()
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(
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/* see the initial comment for an explaination of this magic trick */
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if(&riid == &IID_MAGIC_DELETE_THIS)
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return query_interface(riid, ppvObject);
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template<typename BaseClass, typename SecondaryInterface>
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struct GalliumMultiComObject : public BaseClass, SecondaryInterface
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// we could avoid this duplication, but the increased complexity to do so isn't worth it
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virtual ULONG STDMETHODCALLTYPE AddRef()
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return BaseClass::add_ref();
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virtual ULONG STDMETHODCALLTYPE Release()
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return BaseClass::release();
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inline HRESULT query_interface(REFIID riid, void **ppvObject)
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HRESULT hr = BaseClass::query_interface(riid, ppvObject);
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if(com_traits<SecondaryInterface>::is_self_or_ancestor(riid))
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// must be the virtual AddRef, since it is overridden by some classes
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*ppvObject = (SecondaryInterface*)this;
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return E_NOINTERFACE;
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(
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/* see the initial comment for an explaination of this magic trick */
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if(&riid == &IID_MAGIC_DELETE_THIS)
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return query_interface(riid, ppvObject);
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template<typename T, typename Traits>
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void add_ref() {Traits::add_ref(p);}
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void release() {Traits::release(p);}
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template<typename U, typename UTraits>
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refcnt_ptr(const refcnt_ptr<U, UTraits>& c)
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*this = static_cast<U*>(c.ref());
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template<typename U, typename UTraits>
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refcnt_ptr& operator =(const refcnt_ptr<U, UTraits>& q)
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refcnt_ptr& operator =(U* q)
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p = static_cast<T*>(q);
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const T* operator ->() const
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bool operator !() const
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typedef T* refcnt_ptr::*unspecified_bool_type;
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operator unspecified_bool_type() const
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return p ? &refcnt_ptr::p : 0;
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struct simple_ptr_traits
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static void add_ref(void* p) {}
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static void release(void* p) {}
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struct com_ptr_traits
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static void add_ref(void* p)
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((IUnknown*)p)->AddRef();
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static void release(void* p)
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((IUnknown*)p)->Release();
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struct ComPtr : public refcnt_ptr<T, com_ptr_traits>
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template<typename U, typename UTraits>
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ComPtr& operator =(const refcnt_ptr<U, UTraits>& q)
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ComPtr& operator =(U* q)
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this->p = static_cast<T*>(q);
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template<typename T, typename TTraits, typename U, typename UTraits>
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bool operator ==(const refcnt_ptr<T, TTraits>& a, const refcnt_ptr<U, UTraits>& b)
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template<typename T, typename TTraits, typename U>
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bool operator ==(const refcnt_ptr<T, TTraits>& a, U* b)
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template<typename T, typename TTraits, typename U>
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bool operator ==(U* b, const refcnt_ptr<T, TTraits>& a)
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template<typename T, typename TTraits, typename U, typename UTraits>
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bool operator !=(const refcnt_ptr<T, TTraits>& a, const refcnt_ptr<U, UTraits>& b)
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template<typename T, typename TTraits, typename U>
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bool operator !=(const refcnt_ptr<T, TTraits>& a, U* b)
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template<typename T, typename TTraits, typename U>
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bool operator !=(U* b, const refcnt_ptr<T, TTraits>& a)
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template<bool threadsafe>
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struct maybe_mutex_t;
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struct maybe_mutex_t<true>
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pipe_mutex_init(mutex);
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pipe_mutex_lock(mutex);
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pipe_mutex_unlock(mutex);
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struct maybe_mutex_t<false>
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typedef maybe_mutex_t<true> mutex_t;
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c_string(const char* p)
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operator const char*() const
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static inline bool operator ==(const c_string& a, const c_string& b)
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return !strcmp(a.p, b.p);
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static inline bool operator !=(const c_string& a, const c_string& b)
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return strcmp(a.p, b.p);
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static inline size_t raw_hash(const char* p, size_t size)
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if(sizeof(size_t) >= 8)
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res = (size_t)14695981039346656037ULL;
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res = (size_t)2166136261UL;
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const char* end = p + size;
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if(sizeof(size_t) >= 8)
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res *= (size_t)1099511628211ULL;
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res *= (size_t)16777619UL;
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static inline size_t raw_hash(const T& t)
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return raw_hash((const char*)&t, sizeof(t));
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// TODO: only tested with the gcc libstdc++, might not work elsewhere
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struct hash<GUID> : public std::unary_function<GUID, size_t>
787
inline size_t operator()(GUID __val) const;
790
inline size_t hash<GUID>::operator()(GUID __val) const
792
return raw_hash(__val);
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struct hash<c_string> : public std::unary_function<c_string, size_t>
798
inline size_t operator()(c_string __val) const;
801
inline size_t hash<c_string>::operator()(c_string __val) const
803
return raw_hash(__val.p, strlen(__val.p));
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template<typename T, typename U>
807
struct hash<std::pair<T, U> > : public std::unary_function<std::pair<T, U>, size_t>
809
inline size_t operator()(std::pair<T, U> __val) const;
812
template<typename T, typename U>
813
inline size_t hash<std::pair<T, U> >::operator()(std::pair<T, U> __val) const
815
std::pair<size_t, size_t> p;
816
p.first = hash<T>()(__val.first);
817
p.second = hash<U>()(__val.second);
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template<typename Base, typename RefCnt = refcnt_t>
826
struct GalliumPrivateDataComObject : public GalliumComObject<Base, RefCnt>
828
typedef std::unordered_map<GUID, std::pair<void*, unsigned> > private_data_map_t;
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private_data_map_t private_data_map;
830
mutex_t private_data_mutex;
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~GalliumPrivateDataComObject()
834
for(private_data_map_t::iterator i = private_data_map.begin(), e = private_data_map.end(); i != e; ++i)
836
if(i->second.second == ~0u)
837
((IUnknown*)i->second.first)->Release();
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free(i->second.first);
843
HRESULT get_private_data(
848
lock_t<mutex_t> lock(private_data_mutex);
849
private_data_map_t::iterator i = private_data_map.find(guid);
851
if(i == private_data_map.end())
852
return DXGI_ERROR_NOT_FOUND;
853
if(i->second.second == ~0u)
855
/* TODO: is GetPrivateData on interface data supposed to do this? */
856
if(*pDataSize < sizeof(void*))
860
memcpy(pData, &i->second.first, sizeof(void*));
861
((IUnknown*)i->second.first)->AddRef();
863
*pDataSize = sizeof(void*);
867
unsigned size = std::min(*pDataSize, i->second.second);
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memcpy(pData, i->second.first, size);
875
HRESULT set_private_data(
882
if(DataSize && pData)
884
p = malloc(DataSize);
886
return E_OUTOFMEMORY;
889
lock_t<mutex_t> lock(private_data_mutex);
890
std::pair<void*, unsigned>& v = private_data_map[guid];
894
((IUnknown*)v.first)->Release();
898
if(DataSize && pData)
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memcpy(p, pData, DataSize);
905
private_data_map.erase(guid);
909
HRESULT set_private_data_interface(
911
const IUnknown *pData)
913
lock_t<mutex_t> lock(private_data_mutex);
914
std::pair<void*, unsigned>& v = private_data_map[guid];
918
((IUnknown*)v.first)->Release();
924
((IUnknown*)pData)->AddRef();
925
v.first = (void*)pData;
929
private_data_map.erase(guid);
933
virtual HRESULT STDMETHODCALLTYPE GetPrivateData(
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return get_private_data(guid, pDataSize, pData);
941
virtual HRESULT STDMETHODCALLTYPE SetPrivateData(
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return set_private_data(guid, DataSize, pData);
949
virtual HRESULT STDMETHODCALLTYPE SetPrivateDataInterface(
951
const IUnknown *pData)
953
return set_private_data_interface(guid, pData);
957
template<typename BaseClass, typename SecondaryInterface>
958
struct GalliumMultiPrivateDataComObject : public GalliumMultiComObject<BaseClass, SecondaryInterface>
960
// we could avoid this duplication, but the increased complexity to do so isn't worth it
961
virtual HRESULT STDMETHODCALLTYPE GetPrivateData(
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return BaseClass::get_private_data(guid, pDataSize, pData);
969
virtual HRESULT STDMETHODCALLTYPE SetPrivateData(
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return BaseClass::set_private_data(guid, DataSize, pData);
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virtual HRESULT STDMETHODCALLTYPE SetPrivateDataInterface(
979
const IUnknown *pData)
981
return BaseClass::set_private_data_interface(guid, pData);
985
#define DXGI_FORMAT_COUNT 116
986
extern pipe_format dxgi_to_pipe_format[DXGI_FORMAT_COUNT];
987
extern DXGI_FORMAT pipe_to_dxgi_format[PIPE_FORMAT_COUNT];
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void init_pipe_to_dxgi_format();
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COM_INTERFACE(IGalliumDevice, IUnknown);
992
COM_INTERFACE(IGalliumAdapter, IUnknown);
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COM_INTERFACE(IGalliumResource, IUnknown);
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// used to make QueryInterface know the IIDs of the interface and its ancestors
996
COM_INTERFACE(IDXGIObject, IUnknown)
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COM_INTERFACE(IDXGIDeviceSubObject, IDXGIObject)
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COM_INTERFACE(IDXGISurface, IDXGIDeviceSubObject)
999
COM_INTERFACE(IDXGIOutput, IDXGIObject)
1000
COM_INTERFACE(IDXGIAdapter, IDXGIObject)
1001
COM_INTERFACE(IDXGISwapChain, IDXGIDeviceSubObject)
1002
COM_INTERFACE(IDXGIFactory, IDXGIObject)
1003
COM_INTERFACE(IDXGIDevice, IDXGIObject)
1004
COM_INTERFACE(IDXGIResource, IDXGIDeviceSubObject)
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COM_INTERFACE(IDXGISurface1, IDXGISurface)
1006
COM_INTERFACE(IDXGIDevice1, IDXGIDevice)
1007
COM_INTERFACE(IDXGIAdapter1, IDXGIAdapter)
1008
COM_INTERFACE(IDXGIFactory1, IDXGIFactory)
1010
template<typename Base>
1011
struct GalliumDXGIDevice : public GalliumMultiPrivateDataComObject<Base, IDXGIDevice1>
1013
ComPtr<IDXGIAdapter> adapter;
1015
unsigned max_latency;
1017
GalliumDXGIDevice(IDXGIAdapter* p_adapter)
1019
adapter = p_adapter;
1022
virtual HRESULT STDMETHODCALLTYPE GetParent(
1026
return adapter.p->QueryInterface(riid, ppParent);
1029
virtual HRESULT STDMETHODCALLTYPE GetAdapter(
1030
IDXGIAdapter **pAdapter)
1032
*pAdapter = adapter.ref();
1036
virtual HRESULT STDMETHODCALLTYPE QueryResourceResidency(
1037
IUnknown *const *ppResources,
1038
DXGI_RESIDENCY *pResidencyStatus,
1041
for(unsigned i = 0; i < NumResources; ++i)
1042
pResidencyStatus[i] = DXGI_RESIDENCY_FULLY_RESIDENT;
1046
virtual HRESULT STDMETHODCALLTYPE SetGPUThreadPriority(
1049
priority = Priority;
1053
virtual HRESULT STDMETHODCALLTYPE GetGPUThreadPriority(
1056
*pPriority = priority;
1060
HRESULT STDMETHODCALLTYPE GetMaximumFrameLatency(
1064
*pMaxLatency = max_latency;
1068
virtual HRESULT STDMETHODCALLTYPE SetMaximumFrameLatency(
1071
max_latency = MaxLatency;
1076
COM_INTERFACE(ID3D10Blob, IUnknown);
1078
/* NOTE: ID3DBlob implementations may come from a Microsoft native DLL
1079
* (e.g. d3dcompiler), or perhaps even from the application itself.
1081
* Hence, never try to access the data/size members directly, which is why they are private.
1082
* In internal code, use std::pair<void*, size_t> instead of this class.
1084
class GalliumD3DBlob : public GalliumComObject<ID3DBlob>
1090
GalliumD3DBlob(void* data, size_t size)
1091
: data(data), size(size)
1099
virtual LPVOID STDMETHODCALLTYPE GetBufferPointer()
1104
virtual SIZE_T STDMETHODCALLTYPE GetBufferSize()
1110
#endif /* D3D1XSTUTIL_H_ */