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d2d1effecthelpers.h (2096B) - Raw

      1 /**
      2  * This file has no copyright assigned and is placed in the Public Domain.
      3  * This file is part of the mingw-w64 runtime package.
      4  * No warranty is given; refer to the file DISCLAIMER.PD within this package.
      5  */
      6 
      7 #ifndef _D2D1_EFFECT_HELPERS_H_
      8 #define _D2D1_EFFECT_HELPERS_H_
      9 
     10 #include <winapifamily.h>
     11 
     12 #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
     13 
     14 #include <d2d1effectauthor.h>
     15 
     16 template<typename T>
     17 T GetType(T t) {
     18     return t;
     19 };
     20 
     21 template<class C, typename P, typename I>
     22 HRESULT DeducingValueSetter(HRESULT (C::*callback)(P), I *effect, const BYTE *data, UINT32 dataSize) {
     23     return dataSize == sizeof(P)
     24         ? (static_cast<C*>(effect)->*callback)(*reinterpret_cast<const P*>(data))
     25         : E_INVALIDARG;
     26 }
     27 
     28 template<typename T, T P, typename I>
     29 HRESULT CALLBACK ValueSetter(IUnknown *effect, const BYTE *data, UINT32 dataSize) {
     30     return DeducingValueSetter(P, static_cast<I*>(effect), data, dataSize);
     31 }
     32 
     33 template<class C, typename P, typename I>
     34 HRESULT DeducingValueGetter(P (C::*callback)() const, const I *effect, BYTE *data, UINT32 dataSize, UINT32 *actualSize) {
     35     if (actualSize)
     36         *actualSize = sizeof(P);
     37 
     38     if(!dataSize || !data)
     39         return S_OK;
     40 
     41     if (dataSize < sizeof(P))
     42         return E_NOT_SUFFICIENT_BUFFER;
     43 
     44     *reinterpret_cast<P*>(data) = (static_cast<const C*>(effect)->*callback)();
     45     return S_OK;
     46 }
     47 
     48 template<typename T, T P, typename I>
     49 HRESULT CALLBACK ValueGetter(const IUnknown *effect, BYTE *data, UINT32 dataSize, UINT32 *actualSize) {
     50     return DeducingValueGetter(P, static_cast<const I*>(effect), data, dataSize, actualSize);
     51 }
     52 
     53 #define D2D1_VALUE_TYPE_BINDING(name, setter, getter)                     \
     54     {                                                                     \
     55         name,                                                             \
     56         &ValueSetter<decltype(GetType(setter)), setter, ID2D1EffectImpl>, \
     57         &ValueGetter<decltype(GetType(getter)), getter, ID2D1EffectImpl>  \
     58     }
     59 
     60 #endif /* WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) */
     61 
     62 #endif /* _D2D1_EFFECT_HELPERS_H_ */