dll/win32/windowscodecs/fliprotate.c

   1 /*
   2  * Copyright 2010 Vincent Povirk for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "wincodecs_private.h"
  20
  21 typedef struct FlipRotator {
  22     IWICBitmapFlipRotator IWICBitmapFlipRotator_iface;
  23     LONG ref;
  24     IWICBitmapSource *source;
  25     int flip_x;
  26     int flip_y;
  27     int swap_xy;
  28     CRITICAL_SECTION lock; /* must be held when initialized */
  29 } FlipRotator;
  30
  31 static inline FlipRotator *impl_from_IWICBitmapFlipRotator(IWICBitmapFlipRotator *iface)
  32 {
  33     return CONTAINING_RECORD(iface, FlipRotator, IWICBitmapFlipRotator_iface);
  34 }
  35
  36 static HRESULT WINAPI FlipRotator_QueryInterface(IWICBitmapFlipRotator *iface, REFIID iid,
  37     void **ppv)
  38 {
  39     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
  40     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  41
  42     if (!ppv) return E_INVALIDARG;
  43
  44     if (IsEqualIID(&IID_IUnknown, iid) ||
  45         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  46         IsEqualIID(&IID_IWICBitmapFlipRotator, iid))
  47     {
  48         *ppv = &This->IWICBitmapFlipRotator_iface;
  49     }
  50     else
  51     {
  52         *ppv = NULL;
  53         return E_NOINTERFACE;
  54     }
  55
  56     IUnknown_AddRef((IUnknown*)*ppv);
  57     return S_OK;
  58 }
  59
  60 static ULONG WINAPI FlipRotator_AddRef(IWICBitmapFlipRotator *iface)
  61 {
  62     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
  63     ULONG ref = InterlockedIncrement(&This->ref);
  64
  65     TRACE("(%p) refcount=%u\n", iface, ref);
  66
  67     return ref;
  68 }
  69
  70 static ULONG WINAPI FlipRotator_Release(IWICBitmapFlipRotator *iface)
  71 {
  72     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
  73     ULONG ref = InterlockedDecrement(&This->ref);
  74
  75     TRACE("(%p) refcount=%u\n", iface, ref);
  76
  77     if (ref == 0)
  78     {
  79         This->lock.DebugInfo->Spare[0] = 0;
  80         DeleteCriticalSection(&This->lock);
  81         if (This->source) IWICBitmapSource_Release(This->source);
  82         HeapFree(GetProcessHeap(), 0, This);
  83     }
  84
  85     return ref;
  86 }
  87
  88 static HRESULT WINAPI FlipRotator_GetSize(IWICBitmapFlipRotator *iface,
  89     UINT *puiWidth, UINT *puiHeight)
  90 {
  91     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
  92     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
  93
  94     if (!This->source)
  95         return WINCODEC_ERR_WRONGSTATE;
  96     else if (This->swap_xy)
  97         return IWICBitmapSource_GetSize(This->source, puiHeight, puiWidth);
  98     else
  99         return IWICBitmapSource_GetSize(This->source, puiWidth, puiHeight);
 100 }
 101
 102 static HRESULT WINAPI FlipRotator_GetPixelFormat(IWICBitmapFlipRotator *iface,
 103     WICPixelFormatGUID *pPixelFormat)
 104 {
 105     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
 106     TRACE("(%p,%p)\n", iface, pPixelFormat);
 107
 108     if (!This->source)
 109         return WINCODEC_ERR_WRONGSTATE;
 110     else
 111         return IWICBitmapSource_GetPixelFormat(This->source, pPixelFormat);
 112 }
 113
 114 static HRESULT WINAPI FlipRotator_GetResolution(IWICBitmapFlipRotator *iface,
 115     double *pDpiX, double *pDpiY)
 116 {
 117     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
 118     TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
 119
 120     if (!This->source)
 121         return WINCODEC_ERR_WRONGSTATE;
 122     else if (This->swap_xy)
 123         return IWICBitmapSource_GetResolution(This->source, pDpiY, pDpiX);
 124     else
 125         return IWICBitmapSource_GetResolution(This->source, pDpiX, pDpiY);
 126 }
 127
 128 static HRESULT WINAPI FlipRotator_CopyPalette(IWICBitmapFlipRotator *iface,
 129     IWICPalette *pIPalette)
 130 {
 131     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
 132     TRACE("(%p,%p)\n", iface, pIPalette);
 133
 134     if (!This->source)
 135         return WINCODEC_ERR_WRONGSTATE;
 136     else
 137         return IWICBitmapSource_CopyPalette(This->source, pIPalette);
 138 }
 139
 140 static HRESULT WINAPI FlipRotator_CopyPixels(IWICBitmapFlipRotator *iface,
 141     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 142 {
 143     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
 144     HRESULT hr;
 145     UINT y;
 146     UINT srcy, srcwidth, srcheight;
 147     WICRect rc;
 148     WICRect rect;
 149
 150     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 151
 152     if (!This->source) return WINCODEC_ERR_WRONGSTATE;
 153
 154     if (This->swap_xy || This->flip_x)
 155     {
 156         /* This requires knowledge of the pixel format. */
 157         FIXME("flipping x and rotating are not implemented\n");
 158         return E_NOTIMPL;
 159     }
 160
 161     hr = IWICBitmapSource_GetSize(This->source, &srcwidth, &srcheight);
 162     if (FAILED(hr)) return hr;
 163
 164     if (!prc)
 165     {
 166         UINT width, height;
 167         hr = IWICBitmapFlipRotator_GetSize(iface, &width, &height);
 168         if (FAILED(hr)) return hr;
 169         rect.X = 0;
 170         rect.Y = 0;
 171         rect.Width = width;
 172         rect.Height = height;
 173         prc = &rect;
 174     }
 175
 176     for (y=prc->Y; y - prc->Y < prc->Height; y++)
 177     {
 178         if (This->flip_y)
 179             srcy = srcheight - 1 - y;
 180         else
 181             srcy = y;
 182
 183         rc.X = prc->X;
 184         rc.Y = srcy;
 185         rc.Width = prc->Width;
 186         rc.Height = 1;
 187
 188         hr = IWICBitmapSource_CopyPixels(This->source, &rc, cbStride, cbStride,
 189             pbBuffer);
 190
 191         if (FAILED(hr)) break;
 192
 193         pbBuffer += cbStride;
 194     }
 195
 196     return hr;
 197 }
 198
 199 static HRESULT WINAPI FlipRotator_Initialize(IWICBitmapFlipRotator *iface,
 200     IWICBitmapSource *pISource, WICBitmapTransformOptions options)
 201 {
 202     FlipRotator *This = impl_from_IWICBitmapFlipRotator(iface);
 203     HRESULT hr=S_OK;
 204
 205     TRACE("(%p,%p,%u)\n", iface, pISource, options);
 206
 207     EnterCriticalSection(&This->lock);
 208
 209     if (This->source)
 210     {
 211         hr = WINCODEC_ERR_WRONGSTATE;
 212         goto end;
 213     }
 214
 215     if (options&WICBitmapTransformRotate90)
 216     {
 217         This->swap_xy = 1;
 218         This->flip_x = !This->flip_x;
 219     }
 220
 221     if (options&WICBitmapTransformRotate180)
 222     {
 223         This->flip_x = !This->flip_x;
 224         This->flip_y = !This->flip_y;
 225     }
 226
 227     if (options&WICBitmapTransformFlipHorizontal)
 228         This->flip_x = !This->flip_x;
 229
 230     if (options&WICBitmapTransformFlipVertical)
 231         This->flip_y = !This->flip_y;
 232
 233     IWICBitmapSource_AddRef(pISource);
 234     This->source = pISource;
 235
 236 end:
 237     LeaveCriticalSection(&This->lock);
 238
 239     return hr;
 240 }
 241
 242 static const IWICBitmapFlipRotatorVtbl FlipRotator_Vtbl = {
 243     FlipRotator_QueryInterface,
 244     FlipRotator_AddRef,
 245     FlipRotator_Release,
 246     FlipRotator_GetSize,
 247     FlipRotator_GetPixelFormat,
 248     FlipRotator_GetResolution,
 249     FlipRotator_CopyPalette,
 250     FlipRotator_CopyPixels,
 251     FlipRotator_Initialize
 252 };
 253
 254 HRESULT FlipRotator_Create(IWICBitmapFlipRotator **fliprotator)
 255 {
 256     FlipRotator *This;
 257
 258     This = HeapAlloc(GetProcessHeap(), 0, sizeof(FlipRotator));
 259     if (!This) return E_OUTOFMEMORY;
 260
 261     This->IWICBitmapFlipRotator_iface.lpVtbl = &FlipRotator_Vtbl;
 262     This->ref = 1;
 263     This->source = NULL;
 264     This->flip_x = 0;
 265     This->flip_y = 0;
 266     This->swap_xy = 0;
 267     InitializeCriticalSection(&This->lock);
 268     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FlipRotator.lock");
 269
 270     *fliprotator = &This->IWICBitmapFlipRotator_iface;
 271
 272     return S_OK;
 273 }