Wine Cross Reference
wine/dlls/windowscodecs/fliprotate.c

   /*
    * Copyright 2010 Vincent Povirk for CodeWeavers
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 2.1 of the License, or (at your option) any later version.
    *
    * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  #include "config.h"
  
  #include <stdarg.h>
  
  #define COBJMACROS
  
  #include "windef.h"
  #include "winbase.h"
  #include "objbase.h"
  #include "wincodec.h"
  
  #include "wincodecs_private.h"
  
  #include "wine/debug.h"
  
  WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  
  typedef struct FlipRotator {
      const IWICBitmapFlipRotatorVtbl *lpVtbl;
      LONG ref;
      IWICBitmapSource *source;
      int flip_x;
      int flip_y;
      int swap_xy;
      CRITICAL_SECTION lock; /* must be held when initialized */
  } FlipRotator;
  
  static HRESULT WINAPI FlipRotator_QueryInterface(IWICBitmapFlipRotator *iface, REFIID iid,
      void **ppv)
  {
      FlipRotator *This = (FlipRotator*)iface;
      TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  
      if (!ppv) return E_INVALIDARG;
  
      if (IsEqualIID(&IID_IUnknown, iid) ||
          IsEqualIID(&IID_IWICBitmapSource, iid) ||
          IsEqualIID(&IID_IWICBitmapFlipRotator, iid))
      {
          *ppv = This;
      }
      else
      {
          *ppv = NULL;
          return E_NOINTERFACE;
      }
  
      IUnknown_AddRef((IUnknown*)*ppv);
      return S_OK;
  }
  
  static ULONG WINAPI FlipRotator_AddRef(IWICBitmapFlipRotator *iface)
  {
      FlipRotator *This = (FlipRotator*)iface;
      ULONG ref = InterlockedIncrement(&This->ref);
  
      TRACE("(%p) refcount=%u\n", iface, ref);
  
      return ref;
  }
  
  static ULONG WINAPI FlipRotator_Release(IWICBitmapFlipRotator *iface)
  {
      FlipRotator *This = (FlipRotator*)iface;
      ULONG ref = InterlockedDecrement(&This->ref);
  
      TRACE("(%p) refcount=%u\n", iface, ref);
  
      if (ref == 0)
      {
          This->lock.DebugInfo->Spare[0] = 0;
          DeleteCriticalSection(&This->lock);
          if (This->source) IWICBitmapSource_Release(This->source);
          HeapFree(GetProcessHeap(), 0, This);
      }
  
      return ref;
  }
  
  static HRESULT WINAPI FlipRotator_GetSize(IWICBitmapFlipRotator *iface,
      UINT *puiWidth, UINT *puiHeight)
 {
     FlipRotator *This = (FlipRotator*)iface;
     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
 
     if (!This->source)
         return WINCODEC_ERR_WRONGSTATE;
     else if (This->swap_xy)
         return IWICBitmapSource_GetSize(This->source, puiHeight, puiWidth);
     else
         return IWICBitmapSource_GetSize(This->source, puiWidth, puiHeight);
 }
 
 static HRESULT WINAPI FlipRotator_GetPixelFormat(IWICBitmapFlipRotator *iface,
     WICPixelFormatGUID *pPixelFormat)
 {
     FIXME("(%p,%p): stub\n", iface, pPixelFormat);
 
     return E_NOTIMPL;
 }
 
 static HRESULT WINAPI FlipRotator_GetResolution(IWICBitmapFlipRotator *iface,
     double *pDpiX, double *pDpiY)
 {
     FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 
     return E_NOTIMPL;
 }
 
 static HRESULT WINAPI FlipRotator_CopyPalette(IWICBitmapFlipRotator *iface,
     IWICPalette *pIPalette)
 {
     FIXME("(%p,%p): stub\n", iface, pIPalette);
     return E_NOTIMPL;
 }
 
 static HRESULT WINAPI FlipRotator_CopyPixels(IWICBitmapFlipRotator *iface,
     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 {
     FlipRotator *This = (FlipRotator*)iface;
     HRESULT hr;
     UINT y;
     UINT srcy, srcwidth, srcheight;
     WICRect rc;
 
     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 
     if (!This->source) return WINCODEC_ERR_WRONGSTATE;
 
     if (This->swap_xy || This->flip_x)
     {
         /* This requires knowledge of the pixel format. */
         FIXME("flipping x and rotating are not implemented\n");
         return E_NOTIMPL;
     }
 
     hr = IWICBitmapSource_GetSize(This->source, &srcwidth, &srcheight);
     if (FAILED(hr)) return hr;
 
     for (y=prc->Y; y - prc->Y < prc->Height; y++)
     {
         if (This->flip_y)
             srcy = srcheight - 1 - y;
         else
             srcy = y;
 
         rc.X = prc->X;
         rc.Y = srcy;
         rc.Width = prc->Width;
         rc.Height = 1;
 
         hr = IWICBitmapSource_CopyPixels(This->source, &rc, cbStride, cbStride,
             pbBuffer);
 
         if (FAILED(hr)) break;
 
         pbBuffer += cbStride;
     }
 
     return hr;
 }
 
 static HRESULT WINAPI FlipRotator_Initialize(IWICBitmapFlipRotator *iface,
     IWICBitmapSource *pISource, WICBitmapTransformOptions options)
 {
     FlipRotator *This = (FlipRotator*)iface;
     HRESULT hr=S_OK;
 
     TRACE("(%p,%p,%u)\n", iface, pISource, options);
 
     EnterCriticalSection(&This->lock);
 
     if (This->source)
     {
         hr = WINCODEC_ERR_WRONGSTATE;
         goto end;
     }
 
     if (options&WICBitmapTransformRotate90)
     {
         This->swap_xy = 1;
         This->flip_x = !This->flip_x;
     }
 
     if (options&WICBitmapTransformRotate180)
     {
         This->flip_x = !This->flip_x;
         This->flip_y = !This->flip_y;
     }
 
     if (options&WICBitmapTransformFlipHorizontal)
         This->flip_x = !This->flip_x;
 
     if (options&WICBitmapTransformFlipVertical)
         This->flip_y = !This->flip_y;
 
     IWICBitmapSource_AddRef(pISource);
     This->source = pISource;
 
 end:
     LeaveCriticalSection(&This->lock);
 
     return hr;
 }
 
 static const IWICBitmapFlipRotatorVtbl FlipRotator_Vtbl = {
     FlipRotator_QueryInterface,
     FlipRotator_AddRef,
     FlipRotator_Release,
     FlipRotator_GetSize,
     FlipRotator_GetPixelFormat,
     FlipRotator_GetResolution,
     FlipRotator_CopyPalette,
     FlipRotator_CopyPixels,
     FlipRotator_Initialize
 };
 
 HRESULT FlipRotator_Create(IWICBitmapFlipRotator **fliprotator)
 {
     FlipRotator *This;
 
     This = HeapAlloc(GetProcessHeap(), 0, sizeof(FlipRotator));
     if (!This) return E_OUTOFMEMORY;
 
     This->lpVtbl = &FlipRotator_Vtbl;
     This->ref = 1;
     This->source = NULL;
     This->flip_x = 0;
     This->flip_y = 0;
     This->swap_xy = 0;
     InitializeCriticalSection(&This->lock);
     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FlipRotator.lock");
 
     *fliprotator = (IWICBitmapFlipRotator*)This;
 
     return S_OK;
 }