dlls/windowscodecs/scaler.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
  29 #include "wincodecs_private.h"
  30
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  34
  35 typedef struct BitmapScaler {
  36     IWICBitmapScaler IWICBitmapScaler_iface;
  37     LONG ref;
  38     IWICBitmapSource *source;
  39     UINT width, height;
  40     UINT src_width, src_height;
  41     WICBitmapInterpolationMode mode;
  42     UINT bpp;
  43     void (*fn_get_required_source_rect)(struct BitmapScaler*,UINT,UINT,WICRect*);
  44     void (*fn_copy_scanline)(struct BitmapScaler*,UINT,UINT,UINT,BYTE**,UINT,UINT,BYTE*);
  45     CRITICAL_SECTION lock; /* must be held when initialized */
  46 } BitmapScaler;
  47
  48 static inline BitmapScaler *impl_from_IWICBitmapScaler(IWICBitmapScaler *iface)
  49 {
  50     return CONTAINING_RECORD(iface, BitmapScaler, IWICBitmapScaler_iface);
  51 }
  52
  53 static HRESULT WINAPI BitmapScaler_QueryInterface(IWICBitmapScaler *iface, REFIID iid,
  54     void **ppv)
  55 {
  56     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
  57     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  58
  59     if (!ppv) return E_INVALIDARG;
  60
  61     if (IsEqualIID(&IID_IUnknown, iid) ||
  62         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  63         IsEqualIID(&IID_IWICBitmapScaler, iid))
  64     {
  65         *ppv = &This->IWICBitmapScaler_iface;
  66     }
  67     else
  68     {
  69         *ppv = NULL;
  70         return E_NOINTERFACE;
  71     }
  72
  73     IUnknown_AddRef((IUnknown*)*ppv);
  74     return S_OK;
  75 }
  76
  77 static ULONG WINAPI BitmapScaler_AddRef(IWICBitmapScaler *iface)
  78 {
  79     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
  80     ULONG ref = InterlockedIncrement(&This->ref);
  81
  82     TRACE("(%p) refcount=%u\n", iface, ref);
  83
  84     return ref;
  85 }
  86
  87 static ULONG WINAPI BitmapScaler_Release(IWICBitmapScaler *iface)
  88 {
  89     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
  90     ULONG ref = InterlockedDecrement(&This->ref);
  91
  92     TRACE("(%p) refcount=%u\n", iface, ref);
  93
  94     if (ref == 0)
  95     {
  96         This->lock.DebugInfo->Spare[0] = 0;
  97         DeleteCriticalSection(&This->lock);
  98         if (This->source) IWICBitmapSource_Release(This->source);
  99         HeapFree(GetProcessHeap(), 0, This);
 100     }
 101
 102     return ref;
 103 }
 104
 105 static HRESULT WINAPI BitmapScaler_GetSize(IWICBitmapScaler *iface,
 106     UINT *puiWidth, UINT *puiHeight)
 107 {
 108     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 109     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
 110
 111     if (!puiWidth || !puiHeight)
 112         return E_INVALIDARG;
 113
 114     if (!This->source)
 115         return WINCODEC_ERR_WRONGSTATE;
 116
 117     *puiWidth = This->width;
 118     *puiHeight = This->height;
 119
 120     return S_OK;
 121 }
 122
 123 static HRESULT WINAPI BitmapScaler_GetPixelFormat(IWICBitmapScaler *iface,
 124     WICPixelFormatGUID *pPixelFormat)
 125 {
 126     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 127     TRACE("(%p,%p)\n", iface, pPixelFormat);
 128
 129     if (!pPixelFormat)
 130         return E_INVALIDARG;
 131
 132     if (!This->source)
 133         return WINCODEC_ERR_WRONGSTATE;
 134
 135     return IWICBitmapSource_GetPixelFormat(This->source, pPixelFormat);
 136 }
 137
 138 static HRESULT WINAPI BitmapScaler_GetResolution(IWICBitmapScaler *iface,
 139     double *pDpiX, double *pDpiY)
 140 {
 141     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 142     TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
 143
 144     if (!pDpiX || !pDpiY)
 145         return E_INVALIDARG;
 146
 147     if (!This->source)
 148         return WINCODEC_ERR_WRONGSTATE;
 149
 150     return IWICBitmapSource_GetResolution(This->source, pDpiX, pDpiY);
 151 }
 152
 153 static HRESULT WINAPI BitmapScaler_CopyPalette(IWICBitmapScaler *iface,
 154     IWICPalette *pIPalette)
 155 {
 156     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 157     TRACE("(%p,%p)\n", iface, pIPalette);
 158
 159     if (!pIPalette)
 160         return E_INVALIDARG;
 161
 162     if (!This->source)
 163         return WINCODEC_ERR_WRONGSTATE;
 164
 165     return IWICBitmapSource_CopyPalette(This->source, pIPalette);
 166 }
 167
 168 static void NearestNeighbor_GetRequiredSourceRect(BitmapScaler *This,
 169     UINT x, UINT y, WICRect *src_rect)
 170 {
 171     src_rect->X = x * This->src_width / This->width;
 172     src_rect->Y = y * This->src_height / This->height;
 173     src_rect->Width = src_rect->Height = 1;
 174 }
 175
 176 static void NearestNeighbor_CopyScanline(BitmapScaler *This,
 177     UINT dst_x, UINT dst_y, UINT dst_width,
 178     BYTE **src_data, UINT src_data_x, UINT src_data_y, BYTE *pbBuffer)
 179 {
 180     UINT i;
 181     UINT bytesperpixel = This->bpp/8;
 182     UINT src_x, src_y;
 183
 184     src_y = dst_y * This->src_height / This->height - src_data_y;
 185
 186     for (i=0; i<dst_width; i++)
 187     {
 188         src_x = (dst_x + i) * This->src_width / This->width - src_data_x;
 189         memcpy(pbBuffer + bytesperpixel * i, src_data[src_y] + bytesperpixel * src_x, bytesperpixel);
 190     }
 191 }
 192
 193 static HRESULT WINAPI BitmapScaler_CopyPixels(IWICBitmapScaler *iface,
 194     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 195 {
 196     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 197     HRESULT hr;
 198     WICRect dest_rect;
 199     WICRect src_rect_ul, src_rect_br, src_rect;
 200     BYTE **src_rows;
 201     BYTE *src_bits;
 202     ULONG bytesperrow;
 203     ULONG src_bytesperrow;
 204     ULONG buffer_size;
 205     UINT y;
 206
 207     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 208
 209     EnterCriticalSection(&This->lock);
 210
 211     if (!This->source)
 212     {
 213         hr = WINCODEC_ERR_WRONGSTATE;
 214         goto end;
 215     }
 216
 217     if (prc)
 218         dest_rect = *prc;
 219     else
 220     {
 221         dest_rect.X = dest_rect.Y = 0;
 222         dest_rect.Width = This->width;
 223         dest_rect.Height = This->height;
 224     }
 225
 226     if (dest_rect.X < 0 || dest_rect.Y < 0 ||
 227         dest_rect.X+dest_rect.Width > This->width|| dest_rect.Y+dest_rect.Height > This->height)
 228     {
 229         hr = E_INVALIDARG;
 230         goto end;
 231     }
 232
 233     bytesperrow = ((This->bpp * dest_rect.Width)+7)/8;
 234
 235     if (cbStride < bytesperrow)
 236     {
 237         hr = E_INVALIDARG;
 238         goto end;
 239     }
 240
 241     if ((cbStride * dest_rect.Height) > cbBufferSize)
 242     {
 243         hr = E_INVALIDARG;
 244         goto end;
 245     }
 246
 247     /* MSDN recommends calling CopyPixels once for each scanline from top to
 248      * bottom, and claims codecs optimize for this. Ideally, when called in this
 249      * way, we should avoid requesting a scanline from the source more than
 250      * once, by saving the data that will be useful for the next scanline after
 251      * the call returns. The GetRequiredSourceRect/CopyScanline functions are
 252      * designed to make it possible to do this in a generic way, but for now we
 253      * just grab all the data we need in each call. */
 254
 255     This->fn_get_required_source_rect(This, dest_rect.X, dest_rect.Y, &src_rect_ul);
 256     This->fn_get_required_source_rect(This, dest_rect.X+dest_rect.Width-1,
 257         dest_rect.Y+dest_rect.Height-1, &src_rect_br);
 258
 259     src_rect.X = src_rect_ul.X;
 260     src_rect.Y = src_rect_ul.Y;
 261     src_rect.Width = src_rect_br.Width + src_rect_br.X - src_rect_ul.X;
 262     src_rect.Height = src_rect_br.Height + src_rect_br.Y - src_rect_ul.Y;
 263
 264     src_bytesperrow = (src_rect.Width * This->bpp + 7)/8;
 265     buffer_size = src_bytesperrow * src_rect.Height;
 266
 267     src_rows = HeapAlloc(GetProcessHeap(), 0, sizeof(BYTE*) * src_rect.Height);
 268     src_bits = HeapAlloc(GetProcessHeap(), 0, buffer_size);
 269
 270     if (!src_rows || !src_bits)
 271     {
 272         HeapFree(GetProcessHeap(), 0, src_rows);
 273         HeapFree(GetProcessHeap(), 0, src_bits);
 274         hr = E_OUTOFMEMORY;
 275         goto end;
 276     }
 277
 278     for (y=0; y<src_rect.Height; y++)
 279         src_rows[y] = src_bits + y * src_bytesperrow;
 280
 281     hr = IWICBitmapSource_CopyPixels(This->source, &src_rect, src_bytesperrow,
 282         buffer_size, src_bits);
 283
 284     if (SUCCEEDED(hr))
 285     {
 286         for (y=0; y < dest_rect.Height; y++)
 287         {
 288             This->fn_copy_scanline(This, dest_rect.X, dest_rect.Y+y, dest_rect.Width,
 289                 src_rows, src_rect.X, src_rect.Y, pbBuffer + cbStride * y);
 290         }
 291     }
 292
 293     HeapFree(GetProcessHeap(), 0, src_rows);
 294     HeapFree(GetProcessHeap(), 0, src_bits);
 295
 296 end:
 297     LeaveCriticalSection(&This->lock);
 298
 299     return hr;
 300 }
 301
 302 static HRESULT WINAPI BitmapScaler_Initialize(IWICBitmapScaler *iface,
 303     IWICBitmapSource *pISource, UINT uiWidth, UINT uiHeight,
 304     WICBitmapInterpolationMode mode)
 305 {
 306     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 307     HRESULT hr;
 308     GUID src_pixelformat;
 309
 310     TRACE("(%p,%p,%u,%u,%u)\n", iface, pISource, uiWidth, uiHeight, mode);
 311
 312     EnterCriticalSection(&This->lock);
 313
 314     if (This->source)
 315     {
 316         hr = WINCODEC_ERR_WRONGSTATE;
 317         goto end;
 318     }
 319
 320     This->width = uiWidth;
 321     This->height = uiHeight;
 322     This->mode = mode;
 323
 324     hr = IWICBitmapSource_GetSize(pISource, &This->src_width, &This->src_height);
 325
 326     if (SUCCEEDED(hr))
 327         hr = IWICBitmapSource_GetPixelFormat(pISource, &src_pixelformat);
 328
 329     if (SUCCEEDED(hr))
 330     {
 331         hr = get_pixelformat_bpp(&src_pixelformat, &This->bpp);
 332     }
 333
 334     if (SUCCEEDED(hr))
 335     {
 336         switch (mode)
 337         {
 338         default:
 339             FIXME("unsupported mode %i\n", mode);
 340             /* fall-through */
 341         case WICBitmapInterpolationModeNearestNeighbor:
 342             if ((This->bpp % 8) == 0)
 343             {
 344                 IWICBitmapSource_AddRef(pISource);
 345                 This->source = pISource;
 346             }
 347             else
 348             {
 349                 hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA,
 350                     pISource, &This->source);
 351                 This->bpp = 32;
 352             }
 353             This->fn_get_required_source_rect = NearestNeighbor_GetRequiredSourceRect;
 354             This->fn_copy_scanline = NearestNeighbor_CopyScanline;
 355             break;
 356         }
 357     }
 358
 359 end:
 360     LeaveCriticalSection(&This->lock);
 361
 362     return hr;
 363 }
 364
 365 static const IWICBitmapScalerVtbl BitmapScaler_Vtbl = {
 366     BitmapScaler_QueryInterface,
 367     BitmapScaler_AddRef,
 368     BitmapScaler_Release,
 369     BitmapScaler_GetSize,
 370     BitmapScaler_GetPixelFormat,
 371     BitmapScaler_GetResolution,
 372     BitmapScaler_CopyPalette,
 373     BitmapScaler_CopyPixels,
 374     BitmapScaler_Initialize
 375 };
 376
 377 HRESULT BitmapScaler_Create(IWICBitmapScaler **scaler)
 378 {
 379     BitmapScaler *This;
 380
 381     This = HeapAlloc(GetProcessHeap(), 0, sizeof(BitmapScaler));
 382     if (!This) return E_OUTOFMEMORY;
 383
 384     This->IWICBitmapScaler_iface.lpVtbl = &BitmapScaler_Vtbl;
 385     This->ref = 1;
 386     This->source = NULL;
 387     This->width = 0;
 388     This->height = 0;
 389     This->src_width = 0;
 390     This->src_height = 0;
 391     This->mode = 0;
 392     This->bpp = 0;
 393     InitializeCriticalSection(&This->lock);
 394     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BitmapScaler.lock");
 395
 396     *scaler = &This->IWICBitmapScaler_iface;
 397
 398     return S_OK;
 399 }