dlls/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 "config.h"
  20
  21 #include <stdarg.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "objbase.h"
  28 #include "wincodec.h"
  29
  30 #include "wincodecs_private.h"
  31
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  35
  36 typedef struct FlipRotator {
  37     const IWICBitmapFlipRotatorVtbl *lpVtbl;
  38     LONG ref;
  39     IWICBitmapSource *source;
  40     int flip_x;
  41     int flip_y;
  42     int swap_xy;
  43     CRITICAL_SECTION lock; /* must be held when initialized */
  44 } FlipRotator;
  45
  46 static HRESULT WINAPI FlipRotator_QueryInterface(IWICBitmapFlipRotator *iface, REFIID iid,
  47     void **ppv)
  48 {
  49     FlipRotator *This = (FlipRotator*)iface;
  50     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  51
  52     if (!ppv) return E_INVALIDARG;
  53
  54     if (IsEqualIID(&IID_IUnknown, iid) ||
  55         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  56         IsEqualIID(&IID_IWICBitmapFlipRotator, iid))
  57     {
  58         *ppv = This;
  59     }
  60     else
  61     {
  62         *ppv = NULL;
  63         return E_NOINTERFACE;
  64     }
  65
  66     IUnknown_AddRef((IUnknown*)*ppv);
  67     return S_OK;
  68 }
  69
  70 static ULONG WINAPI FlipRotator_AddRef(IWICBitmapFlipRotator *iface)
  71 {
  72     FlipRotator *This = (FlipRotator*)iface;
  73     ULONG ref = InterlockedIncrement(&This->ref);
  74
  75     TRACE("(%p) refcount=%u\n", iface, ref);
  76
  77     return ref;
  78 }
  79
  80 static ULONG WINAPI FlipRotator_Release(IWICBitmapFlipRotator *iface)
  81 {
  82     FlipRotator *This = (FlipRotator*)iface;
  83     ULONG ref = InterlockedDecrement(&This->ref);
  84
  85     TRACE("(%p) refcount=%u\n", iface, ref);
  86
  87     if (ref == 0)
  88     {
  89         This->lock.DebugInfo->Spare[0] = 0;
  90         DeleteCriticalSection(&This->lock);
  91         if (This->source) IWICBitmapSource_Release(This->source);
  92         HeapFree(GetProcessHeap(), 0, This);
  93     }
  94
  95     return ref;
  96 }
  97
  98 static HRESULT WINAPI FlipRotator_GetSize(IWICBitmapFlipRotator *iface,
  99     UINT *puiWidth, UINT *puiHeight)
 100 {
 101     FlipRotator *This = (FlipRotator*)iface;
 102     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
 103
 104     if (!This->source)
 105         return WINCODEC_ERR_WRONGSTATE;
 106     else if (This->swap_xy)
 107         return IWICBitmapSource_GetSize(This->source, puiHeight, puiWidth);
 108     else
 109         return IWICBitmapSource_GetSize(This->source, puiWidth, puiHeight);
 110 }
 111
 112 static HRESULT WINAPI FlipRotator_GetPixelFormat(IWICBitmapFlipRotator *iface,
 113     WICPixelFormatGUID *pPixelFormat)
 114 {
 115     FIXME("(%p,%p): stub\n", iface, pPixelFormat);
 116
 117     return E_NOTIMPL;
 118 }
 119
 120 static HRESULT WINAPI FlipRotator_GetResolution(IWICBitmapFlipRotator *iface,
 121     double *pDpiX, double *pDpiY)
 122 {
 123     FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 124
 125     return E_NOTIMPL;
 126 }
 127
 128 static HRESULT WINAPI FlipRotator_CopyPalette(IWICBitmapFlipRotator *iface,
 129     IWICPalette *pIPalette)
 130 {
 131     FIXME("(%p,%p): stub\n", iface, pIPalette);
 132     return E_NOTIMPL;
 133 }
 134
 135 static HRESULT WINAPI FlipRotator_CopyPixels(IWICBitmapFlipRotator *iface,
 136     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 137 {
 138     FlipRotator *This = (FlipRotator*)iface;
 139     HRESULT hr;
 140     UINT y;
 141     UINT srcy, srcwidth, srcheight;
 142     WICRect rc;
 143     WICRect rect;
 144
 145     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 146
 147     if (!This->source) return WINCODEC_ERR_WRONGSTATE;
 148
 149     if (This->swap_xy || This->flip_x)
 150     {
 151         /* This requires knowledge of the pixel format. */
 152         FIXME("flipping x and rotating are not implemented\n");
 153         return E_NOTIMPL;
 154     }
 155
 156     hr = IWICBitmapSource_GetSize(This->source, &srcwidth, &srcheight);
 157     if (FAILED(hr)) return hr;
 158
 159     if (!prc)
 160     {
 161         UINT width, height;
 162         hr = IWICBitmapSource_GetSize(iface, &width, &height);
 163         if (FAILED(hr)) return hr;
 164         rect.X = 0;
 165         rect.Y = 0;
 166         rect.Width = width;
 167         rect.Height = height;
 168         prc = &rect;
 169     }
 170
 171     for (y=prc->Y; y - prc->Y < prc->Height; y++)
 172     {
 173         if (This->flip_y)
 174             srcy = srcheight - 1 - y;
 175         else
 176             srcy = y;
 177
 178         rc.X = prc->X;
 179         rc.Y = srcy;
 180         rc.Width = prc->Width;
 181         rc.Height = 1;
 182
 183         hr = IWICBitmapSource_CopyPixels(This->source, &rc, cbStride, cbStride,
 184             pbBuffer);
 185
 186         if (FAILED(hr)) break;
 187
 188         pbBuffer += cbStride;
 189     }
 190
 191     return hr;
 192 }
 193
 194 static HRESULT WINAPI FlipRotator_Initialize(IWICBitmapFlipRotator *iface,
 195     IWICBitmapSource *pISource, WICBitmapTransformOptions options)
 196 {
 197     FlipRotator *This = (FlipRotator*)iface;
 198     HRESULT hr=S_OK;
 199
 200     TRACE("(%p,%p,%u)\n", iface, pISource, options);
 201
 202     EnterCriticalSection(&This->lock);
 203
 204     if (This->source)
 205     {
 206         hr = WINCODEC_ERR_WRONGSTATE;
 207         goto end;
 208     }
 209
 210     if (options&WICBitmapTransformRotate90)
 211     {
 212         This->swap_xy = 1;
 213         This->flip_x = !This->flip_x;
 214     }
 215
 216     if (options&WICBitmapTransformRotate180)
 217     {
 218         This->flip_x = !This->flip_x;
 219         This->flip_y = !This->flip_y;
 220     }
 221
 222     if (options&WICBitmapTransformFlipHorizontal)
 223         This->flip_x = !This->flip_x;
 224
 225     if (options&WICBitmapTransformFlipVertical)
 226         This->flip_y = !This->flip_y;
 227
 228     IWICBitmapSource_AddRef(pISource);
 229     This->source = pISource;
 230
 231 end:
 232     LeaveCriticalSection(&This->lock);
 233
 234     return hr;
 235 }
 236
 237 static const IWICBitmapFlipRotatorVtbl FlipRotator_Vtbl = {
 238     FlipRotator_QueryInterface,
 239     FlipRotator_AddRef,
 240     FlipRotator_Release,
 241     FlipRotator_GetSize,
 242     FlipRotator_GetPixelFormat,
 243     FlipRotator_GetResolution,
 244     FlipRotator_CopyPalette,
 245     FlipRotator_CopyPixels,
 246     FlipRotator_Initialize
 247 };
 248
 249 HRESULT FlipRotator_Create(IWICBitmapFlipRotator **fliprotator)
 250 {
 251     FlipRotator *This;
 252
 253     This = HeapAlloc(GetProcessHeap(), 0, sizeof(FlipRotator));
 254     if (!This) return E_OUTOFMEMORY;
 255
 256     This->lpVtbl = &FlipRotator_Vtbl;
 257     This->ref = 1;
 258     This->source = NULL;
 259     This->flip_x = 0;
 260     This->flip_y = 0;
 261     This->swap_xy = 0;
 262     InitializeCriticalSection(&This->lock);
 263     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": FlipRotator.lock");
 264
 265     *fliprotator = (IWICBitmapFlipRotator*)This;
 266
 267     return S_OK;
 268 }