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 #include "wincodec.h"
  27
  28 #include "wincodecs_private.h"
  29
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  33
  34 typedef struct BitmapClipper {
  35     IWICBitmapClipper IWICBitmapClipper_iface;
  36     LONG ref;
  37     IWICBitmapSource *source;
  38     WICRect rect;
  39     CRITICAL_SECTION lock; /* must be held when initialized */
  40 } BitmapClipper;
  41
  42 static inline BitmapClipper *impl_from_IWICBitmapClipper(IWICBitmapClipper *iface)
  43 {
  44     return CONTAINING_RECORD(iface, BitmapClipper, IWICBitmapClipper_iface);
  45 }
  46
  47 static HRESULT WINAPI BitmapClipper_QueryInterface(IWICBitmapClipper *iface, REFIID iid,
  48     void **ppv)
  49 {
  50     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
  51     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  52
  53     if (!ppv) return E_INVALIDARG;
  54
  55     if (IsEqualIID(&IID_IUnknown, iid) ||
  56         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  57         IsEqualIID(&IID_IWICBitmapClipper, iid))
  58     {
  59         *ppv = &This->IWICBitmapClipper_iface;
  60     }
  61     else
  62     {
  63         *ppv = NULL;
  64         return E_NOINTERFACE;
  65     }
  66
  67     IUnknown_AddRef((IUnknown*)*ppv);
  68     return S_OK;
  69 }
  70
  71 static ULONG WINAPI BitmapClipper_AddRef(IWICBitmapClipper *iface)
  72 {
  73     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
  74     ULONG ref = InterlockedIncrement(&This->ref);
  75
  76     TRACE("(%p) refcount=%u\n", iface, ref);
  77
  78     return ref;
  79 }
  80
  81 static ULONG WINAPI BitmapClipper_Release(IWICBitmapClipper *iface)
  82 {
  83     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
  84     ULONG ref = InterlockedDecrement(&This->ref);
  85
  86     TRACE("(%p) refcount=%u\n", iface, ref);
  87
  88     if (ref == 0)
  89     {
  90         This->lock.DebugInfo->Spare[0] = 0;
  91         DeleteCriticalSection(&This->lock);
  92         if (This->source) IWICBitmapSource_Release(This->source);
  93         HeapFree(GetProcessHeap(), 0, This);
  94     }
  95
  96     return ref;
  97 }
  98
  99 static HRESULT WINAPI BitmapClipper_GetSize(IWICBitmapClipper *iface,
 100     UINT *width, UINT *height)
 101 {
 102     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 103
 104     TRACE("(%p,%p,%p)\n", iface, width, height);
 105
 106     if (!width || !height)
 107         return E_INVALIDARG;
 108
 109     if (!This->source)
 110         return WINCODEC_ERR_WRONGSTATE;
 111
 112     *width = This->rect.Width;
 113     *height = This->rect.Height;
 114
 115     return S_OK;
 116 }
 117
 118 static HRESULT WINAPI BitmapClipper_GetPixelFormat(IWICBitmapClipper *iface,
 119     WICPixelFormatGUID *format)
 120 {
 121     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 122     TRACE("(%p,%p)\n", iface, format);
 123
 124     if (!format)
 125         return E_INVALIDARG;
 126
 127     if (!This->source)
 128         return WINCODEC_ERR_WRONGSTATE;
 129
 130     return IWICBitmapSource_GetPixelFormat(This->source, format);
 131 }
 132
 133 static HRESULT WINAPI BitmapClipper_GetResolution(IWICBitmapClipper *iface,
 134     double *dpiX, double *dpiY)
 135 {
 136     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 137
 138     TRACE("(%p,%p,%p)\n", iface, dpiX, dpiY);
 139
 140     if (!dpiX || !dpiY)
 141         return E_INVALIDARG;
 142
 143     if (!This->source)
 144         return WINCODEC_ERR_WRONGSTATE;
 145
 146     return IWICBitmapSource_GetResolution(This->source, dpiX, dpiY);
 147 }
 148
 149 static HRESULT WINAPI BitmapClipper_CopyPalette(IWICBitmapClipper *iface,
 150     IWICPalette *palette)
 151 {
 152     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 153
 154     TRACE("(%p,%p)\n", iface, palette);
 155
 156     if (!palette)
 157         return E_INVALIDARG;
 158
 159     if (!This->source)
 160         return WINCODEC_ERR_WRONGSTATE;
 161
 162     return IWICBitmapSource_CopyPalette(This->source, palette);
 163 }
 164
 165 static HRESULT WINAPI BitmapClipper_CopyPixels(IWICBitmapClipper *iface,
 166     const WICRect *rc, UINT stride, UINT buffer_size, BYTE *buffer)
 167 {
 168     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 169     WICRect rect;
 170
 171     TRACE("(%p,%p,%u,%u,%p)\n", iface, rc, stride, buffer_size, buffer);
 172
 173     if (!This->source)
 174         return WINCODEC_ERR_WRONGSTATE;
 175
 176     if (rc)
 177     {
 178         rect = *rc;
 179
 180         /* transform to source coordinates */
 181         rect.X += This->rect.X;
 182         rect.Y += This->rect.Y;
 183
 184         if ((rect.X + rect.Width > This->rect.X + This->rect.Width) ||
 185             (rect.Y + rect.Height > This->rect.Y + This->rect.Height))
 186             return E_INVALIDARG;
 187
 188         rc = &rect;
 189     }
 190     else
 191         rc = &This->rect;
 192
 193     return IWICBitmapSource_CopyPixels(This->source, rc, stride, buffer_size, buffer);
 194 }
 195
 196 static HRESULT WINAPI BitmapClipper_Initialize(IWICBitmapClipper *iface,
 197     IWICBitmapSource *source, const WICRect *rc)
 198 {
 199     BitmapClipper *This = impl_from_IWICBitmapClipper(iface);
 200     UINT width, height;
 201     HRESULT hr = S_OK;
 202
 203     TRACE("(%p,%p,%p)\n", iface, source, rc);
 204
 205     EnterCriticalSection(&This->lock);
 206
 207     if (This->source)
 208     {
 209         hr = WINCODEC_ERR_WRONGSTATE;
 210         goto end;
 211     }
 212
 213     hr = IWICBitmapSource_GetSize(source, &width, &height);
 214     if (FAILED(hr)) goto end;
 215
 216     if  ((rc->X + rc->Width > width) || (rc->Y + rc->Height > height))
 217     {
 218         hr = E_INVALIDARG;
 219         goto end;
 220     }
 221
 222     This->rect = *rc;
 223     This->source = source;
 224     IWICBitmapSource_AddRef(This->source);
 225
 226 end:
 227     LeaveCriticalSection(&This->lock);
 228
 229     return hr;
 230 }
 231
 232 static const IWICBitmapClipperVtbl BitmapClipper_Vtbl = {
 233     BitmapClipper_QueryInterface,
 234     BitmapClipper_AddRef,
 235     BitmapClipper_Release,
 236     BitmapClipper_GetSize,
 237     BitmapClipper_GetPixelFormat,
 238     BitmapClipper_GetResolution,
 239     BitmapClipper_CopyPalette,
 240     BitmapClipper_CopyPixels,
 241     BitmapClipper_Initialize
 242 };
 243
 244 HRESULT BitmapClipper_Create(IWICBitmapClipper **clipper)
 245 {
 246     BitmapClipper *This;
 247
 248     This = HeapAlloc(GetProcessHeap(), 0, sizeof(BitmapClipper));
 249     if (!This) return E_OUTOFMEMORY;
 250
 251     This->IWICBitmapClipper_iface.lpVtbl = &BitmapClipper_Vtbl;
 252     This->ref = 1;
 253     This->source = NULL;
 254     InitializeCriticalSection(&This->lock);
 255     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BitmapClipper.lock");
 256
 257     *clipper = &This->IWICBitmapClipper_iface;
 258
 259     return S_OK;
 260 }