dlls/windowscodecs/clipper.c

   1 /*
   2  * Copyright 2013 Nikolay Sivov 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 <stdarg.h>
  20
  21 #define COBJMACROS
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "objbase.h"
  26
  27 #include "wincodecs_private.h"
  28
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  32
  33 typedef struct BitmapClipper {
  34     IWICBitmapClipper IWICBitmapClipper_iface;
  35     LONG ref;
  36     IWICBitmapSource *source;
  37     WICRect rect;
  38     CRITICAL_SECTION lock; /* must be held when initialized */
  39 } BitmapClipper;
  40
  41 static inline BitmapClipper *impl_from_IWICBitmapClipper(IWICBitmapClipper *iface)
  42 {
  43     return CONTAINING_RECORD(iface, BitmapClipper, IWICBitmapClipper_iface);
  44 }
  45
  46 static HRESULT WINAPI BitmapClipper_QueryInterface(IWICBitmapClipper *iface, REFIID iid,
  47     void **ppv)
  48 {
  49     BitmapClipper *This = impl_from_IWICBitmapClipper(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_IWICBitmapClipper, iid))
  57     {
  58         *ppv = &This->IWICBitmapClipper_iface;
  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 BitmapClipper_AddRef(IWICBitmapClipper *iface)
  71 {
  72     BitmapClipper *This = impl_from_IWICBitmapClipper(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 BitmapClipper_Release(IWICBitmapClipper *iface)
  81 {
  82     BitmapClipper *This = impl_from_IWICBitmapClipper(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 BitmapClipper_GetSize(IWICBitmapClipper *iface,
  99     UINT *width, UINT *height)
 100 {
 101     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 102
 103     TRACE("(%p,%p,%p)\n", iface, width, height);
 104
 105     if (!width || !height)
 106         return E_INVALIDARG;
 107
 108     if (!This->source)
 109         return WINCODEC_ERR_WRONGSTATE;
 110
 111     *width = This->rect.Width;
 112     *height = This->rect.Height;
 113
 114     return S_OK;
 115 }
 116
 117 static HRESULT WINAPI BitmapClipper_GetPixelFormat(IWICBitmapClipper *iface,
 118     WICPixelFormatGUID *format)
 119 {
 120     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 121     TRACE("(%p,%p)\n", iface, format);
 122
 123     if (!format)
 124         return E_INVALIDARG;
 125
 126     if (!This->source)
 127         return WINCODEC_ERR_WRONGSTATE;
 128
 129     return IWICBitmapSource_GetPixelFormat(This->source, format);
 130 }
 131
 132 static HRESULT WINAPI BitmapClipper_GetResolution(IWICBitmapClipper *iface,
 133     double *dpiX, double *dpiY)
 134 {
 135     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 136
 137     TRACE("(%p,%p,%p)\n", iface, dpiX, dpiY);
 138
 139     if (!dpiX || !dpiY)
 140         return E_INVALIDARG;
 141
 142     if (!This->source)
 143         return WINCODEC_ERR_WRONGSTATE;
 144
 145     return IWICBitmapSource_GetResolution(This->source, dpiX, dpiY);
 146 }
 147
 148 static HRESULT WINAPI BitmapClipper_CopyPalette(IWICBitmapClipper *iface,
 149     IWICPalette *palette)
 150 {
 151     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 152
 153     TRACE("(%p,%p)\n", iface, palette);
 154
 155     if (!palette)
 156         return E_INVALIDARG;
 157
 158     if (!This->source)
 159         return WINCODEC_ERR_WRONGSTATE;
 160
 161     return IWICBitmapSource_CopyPalette(This->source, palette);
 162 }
 163
 164 static HRESULT WINAPI BitmapClipper_CopyPixels(IWICBitmapClipper *iface,
 165     const WICRect *rc, UINT stride, UINT buffer_size, BYTE *buffer)
 166 {
 167     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 168     WICRect rect;
 169
 170     TRACE("(%p,%s,%u,%u,%p)\n", iface, debug_wic_rect(rc), stride, buffer_size, buffer);
 171
 172     if (!This->source)
 173         return WINCODEC_ERR_WRONGSTATE;
 174
 175     if (rc)
 176     {
 177         rect = *rc;
 178
 179         /* transform to source coordinates */
 180         rect.X += This->rect.X;
 181         rect.Y += This->rect.Y;
 182
 183         if ((rect.X + rect.Width > This->rect.X + This->rect.Width) ||
 184             (rect.Y + rect.Height > This->rect.Y + This->rect.Height))
 185             return E_INVALIDARG;
 186
 187         rc = &rect;
 188     }
 189     else
 190         rc = &This->rect;
 191
 192     return IWICBitmapSource_CopyPixels(This->source, rc, stride, buffer_size, buffer);
 193 }
 194
 195 static HRESULT WINAPI BitmapClipper_Initialize(IWICBitmapClipper *iface,
 196     IWICBitmapSource *source, const WICRect *rc)
 197 {
 198     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 199     UINT width, height;
 200     HRESULT hr = S_OK;
 201
 202     TRACE("(%p,%p,%s)\n", iface, source, debug_wic_rect(rc));
 203
 204     EnterCriticalSection(&This->lock);
 205
 206     if (This->source)
 207     {
 208         hr = WINCODEC_ERR_WRONGSTATE;
 209         goto end;
 210     }
 211
 212     hr = IWICBitmapSource_GetSize(source, &width, &height);
 213     if (FAILED(hr)) goto end;
 214
 215     if  ((rc->X + rc->Width > width) || (rc->Y + rc->Height > height))
 216     {
 217         hr = E_INVALIDARG;
 218         goto end;
 219     }
 220
 221     This->rect = *rc;
 222     This->source = source;
 223     IWICBitmapSource_AddRef(This->source);
 224
 225 end:
 226     LeaveCriticalSection(&This->lock);
 227
 228     return hr;
 229 }
 230
 231 static const IWICBitmapClipperVtbl BitmapClipper_Vtbl = {
 232     BitmapClipper_QueryInterface,
 233     BitmapClipper_AddRef,
 234     BitmapClipper_Release,
 235     BitmapClipper_GetSize,
 236     BitmapClipper_GetPixelFormat,
 237     BitmapClipper_GetResolution,
 238     BitmapClipper_CopyPalette,
 239     BitmapClipper_CopyPixels,
 240     BitmapClipper_Initialize
 241 };
 242
 243 HRESULT BitmapClipper_Create(IWICBitmapClipper **clipper)
 244 {
 245     BitmapClipper *This;
 246
 247     This = HeapAlloc(GetProcessHeap(), 0, sizeof(BitmapClipper));
 248     if (!This) return E_OUTOFMEMORY;
 249
 250     This->IWICBitmapClipper_iface.lpVtbl = &BitmapClipper_Vtbl;
 251     This->ref = 1;
 252     This->source = NULL;
 253     InitializeCriticalSection(&This->lock);
 254     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BitmapClipper.lock");
 255
 256     *clipper = &This->IWICBitmapClipper_iface;
 257
 258     return S_OK;
 259 }