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 #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 BitmapScaler {
  37     IWICBitmapScaler IWICBitmapScaler_iface;
  38     LONG ref;
  39     IWICBitmapSource *source;
  40     UINT width, height;
  41     UINT src_width, src_height;
  42     WICBitmapInterpolationMode mode;
  43     UINT bpp;
  44     void (*fn_get_required_source_rect)(struct BitmapScaler*,UINT,UINT,WICRect*);
  45     void (*fn_copy_scanline)(struct BitmapScaler*,UINT,UINT,UINT,BYTE**,UINT,UINT,BYTE*);
  46     CRITICAL_SECTION lock; /* must be held when initialized */
  47 } BitmapScaler;
  48
  49 static inline BitmapScaler *impl_from_IWICBitmapScaler(IWICBitmapScaler *iface)
  50 {
  51     return CONTAINING_RECORD(iface, BitmapScaler, IWICBitmapScaler_iface);
  52 }
  53
  54 static HRESULT WINAPI BitmapScaler_QueryInterface(IWICBitmapScaler *iface, REFIID iid,
  55     void **ppv)
  56 {
  57     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
  58     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
  59
  60     if (!ppv) return E_INVALIDARG;
  61
  62     if (IsEqualIID(&IID_IUnknown, iid) ||
  63         IsEqualIID(&IID_IWICBitmapSource, iid) ||
  64         IsEqualIID(&IID_IWICBitmapScaler, iid))
  65     {
  66         *ppv = This;
  67     }
  68     else
  69     {
  70         *ppv = NULL;
  71         return E_NOINTERFACE;
  72     }
  73
  74     IUnknown_AddRef((IUnknown*)*ppv);
  75     return S_OK;
  76 }
  77
  78 static ULONG WINAPI BitmapScaler_AddRef(IWICBitmapScaler *iface)
  79 {
  80     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
  81     ULONG ref = InterlockedIncrement(&This->ref);
  82
  83     TRACE("(%p) refcount=%u\n", iface, ref);
  84
  85     return ref;
  86 }
  87
  88 static ULONG WINAPI BitmapScaler_Release(IWICBitmapScaler *iface)
  89 {
  90     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
  91     ULONG ref = InterlockedDecrement(&This->ref);
  92
  93     TRACE("(%p) refcount=%u\n", iface, ref);
  94
  95     if (ref == 0)
  96     {
  97         This->lock.DebugInfo->Spare[0] = 0;
  98         DeleteCriticalSection(&This->lock);
  99         if (This->source) IWICBitmapSource_Release(This->source);
 100         HeapFree(GetProcessHeap(), 0, This);
 101     }
 102
 103     return ref;
 104 }
 105
 106 static HRESULT WINAPI BitmapScaler_GetSize(IWICBitmapScaler *iface,
 107     UINT *puiWidth, UINT *puiHeight)
 108 {
 109     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 110     TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
 111
 112     if (!puiWidth || !puiHeight)
 113         return E_INVALIDARG;
 114
 115     if (!This->source)
 116         return WINCODEC_ERR_WRONGSTATE;
 117
 118     *puiWidth = This->width;
 119     *puiHeight = This->height;
 120
 121     return S_OK;
 122 }
 123
 124 static HRESULT WINAPI BitmapScaler_GetPixelFormat(IWICBitmapScaler *iface,
 125     WICPixelFormatGUID *pPixelFormat)
 126 {
 127     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 128     TRACE("(%p,%p)\n", iface, pPixelFormat);
 129
 130     if (!pPixelFormat)
 131         return E_INVALIDARG;
 132
 133     if (!This->source)
 134         return WINCODEC_ERR_WRONGSTATE;
 135
 136     return IWICBitmapSource_GetPixelFormat(This->source, pPixelFormat);
 137 }
 138
 139 static HRESULT WINAPI BitmapScaler_GetResolution(IWICBitmapScaler *iface,
 140     double *pDpiX, double *pDpiY)
 141 {
 142     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 143     TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
 144
 145     if (!pDpiX || !pDpiY)
 146         return E_INVALIDARG;
 147
 148     if (!This->source)
 149         return WINCODEC_ERR_WRONGSTATE;
 150
 151     return IWICBitmapSource_GetResolution(This->source, pDpiX, pDpiY);
 152 }
 153
 154 static HRESULT WINAPI BitmapScaler_CopyPalette(IWICBitmapScaler *iface,
 155     IWICPalette *pIPalette)
 156 {
 157     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 158     TRACE("(%p,%p)\n", iface, pIPalette);
 159
 160     if (!pIPalette)
 161         return E_INVALIDARG;
 162
 163     if (!This->source)
 164         return WINCODEC_ERR_WRONGSTATE;
 165
 166     return IWICBitmapSource_CopyPalette(This->source, pIPalette);
 167 }
 168
 169 static void NearestNeighbor_GetRequiredSourceRect(BitmapScaler *This,
 170     UINT x, UINT y, WICRect *src_rect)
 171 {
 172     src_rect->X = x * This->src_width / This->width;
 173     src_rect->Y = y * This->src_height / This->height;
 174     src_rect->Width = src_rect->Height = 1;
 175 }
 176
 177 static void NearestNeighbor_CopyScanline(BitmapScaler *This,
 178     UINT dst_x, UINT dst_y, UINT dst_width,
 179     BYTE **src_data, UINT src_data_x, UINT src_data_y, BYTE *pbBuffer)
 180 {
 181     int i;
 182     UINT bytesperpixel = This->bpp/8;
 183     UINT src_x, src_y;
 184
 185     src_y = dst_y * This->src_height / This->height - src_data_y;
 186
 187     for (i=0; i<dst_width; i++)
 188     {
 189         src_x = (dst_x + i) * This->src_width / This->width - src_data_x;
 190         memcpy(pbBuffer + bytesperpixel * i, src_data[src_y] + bytesperpixel * src_x, bytesperpixel);
 191     }
 192 }
 193
 194 static HRESULT WINAPI BitmapScaler_CopyPixels(IWICBitmapScaler *iface,
 195     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 196 {
 197     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 198     HRESULT hr;
 199     WICRect dest_rect;
 200     WICRect src_rect_ul, src_rect_br, src_rect;
 201     BYTE **src_rows;
 202     BYTE *src_bits;
 203     ULONG bytesperrow;
 204     ULONG src_bytesperrow;
 205     ULONG buffer_size;
 206     UINT y;
 207
 208     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 209
 210     EnterCriticalSection(&This->lock);
 211
 212     if (!This->source)
 213     {
 214         hr = WINCODEC_ERR_WRONGSTATE;
 215         goto end;
 216     }
 217
 218     if (prc)
 219         dest_rect = *prc;
 220     else
 221     {
 222         dest_rect.X = dest_rect.Y = 0;
 223         dest_rect.Width = This->width;
 224         dest_rect.Height = This->height;
 225     }
 226
 227     if (dest_rect.X < 0 || dest_rect.Y < 0 ||
 228         dest_rect.X+dest_rect.Width > This->width|| dest_rect.Y+dest_rect.Height > This->height)
 229     {
 230         hr = E_INVALIDARG;
 231         goto end;
 232     }
 233
 234     bytesperrow = ((This->bpp * dest_rect.Width)+7)/8;
 235
 236     if (cbStride < bytesperrow)
 237     {
 238         hr = E_INVALIDARG;
 239         goto end;
 240     }
 241
 242     if ((cbStride * dest_rect.Height) > cbBufferSize)
 243     {
 244         hr = E_INVALIDARG;
 245         goto end;
 246     }
 247
 248     /* MSDN recommends calling CopyPixels once for each scanline from top to
 249      * bottom, and claims codecs optimize for this. Ideally, when called in this
 250      * way, we should avoid requesting a scanline from the source more than
 251      * once, by saving the data that will be useful for the next scanline after
 252      * the call returns. The GetRequiredSourceRect/CopyScanline functions are
 253      * designed to make it possible to do this in a generic way, but for now we
 254      * just grab all the data we need in each call. */
 255
 256     This->fn_get_required_source_rect(This, dest_rect.X, dest_rect.Y, &src_rect_ul);
 257     This->fn_get_required_source_rect(This, dest_rect.X+dest_rect.Width-1,
 258         dest_rect.Y+dest_rect.Height-1, &src_rect_br);
 259
 260     src_rect.X = src_rect_ul.X;
 261     src_rect.Y = src_rect_ul.Y;
 262     src_rect.Width = src_rect_br.Width + src_rect_br.X - src_rect_ul.X;
 263     src_rect.Height = src_rect_br.Height + src_rect_br.Y - src_rect_ul.Y;
 264
 265     src_bytesperrow = (src_rect.Width * This->bpp + 7)/8;
 266     buffer_size = src_bytesperrow * src_rect.Height;
 267
 268     src_rows = HeapAlloc(GetProcessHeap(), 0, sizeof(BYTE*) * src_rect.Height);
 269     src_bits = HeapAlloc(GetProcessHeap(), 0, buffer_size);
 270
 271     if (!src_rows || !src_bits)
 272     {
 273         HeapFree(GetProcessHeap(), 0, src_rows);
 274         HeapFree(GetProcessHeap(), 0, src_bits);
 275         hr = E_OUTOFMEMORY;
 276         goto end;
 277     }
 278
 279     for (y=0; y<src_rect.Height; y++)
 280         src_rows[y] = src_bits + y * src_bytesperrow;
 281
 282     hr = IWICBitmapSource_CopyPixels(This->source, &src_rect, src_bytesperrow,
 283         buffer_size, src_bits);
 284
 285     if (SUCCEEDED(hr))
 286     {
 287         for (y=0; y < dest_rect.Height; y++)
 288         {
 289             This->fn_copy_scanline(This, dest_rect.X, dest_rect.Y+y, dest_rect.Width,
 290                 src_rows, src_rect.X, src_rect.Y, pbBuffer + cbStride * y);
 291         }
 292     }
 293
 294     HeapFree(GetProcessHeap(), 0, src_rows);
 295     HeapFree(GetProcessHeap(), 0, src_bits);
 296
 297 end:
 298     LeaveCriticalSection(&This->lock);
 299
 300     return hr;
 301 }
 302
 303 static HRESULT WINAPI BitmapScaler_Initialize(IWICBitmapScaler *iface,
 304     IWICBitmapSource *pISource, UINT uiWidth, UINT uiHeight,
 305     WICBitmapInterpolationMode mode)
 306 {
 307     BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
 308     HRESULT hr;
 309     GUID src_pixelformat;
 310
 311     TRACE("(%p,%p,%u,%u,%u)\n", iface, pISource, uiWidth, uiHeight, mode);
 312
 313     EnterCriticalSection(&This->lock);
 314
 315     if (This->source)
 316     {
 317         hr = WINCODEC_ERR_WRONGSTATE;
 318         goto end;
 319     }
 320
 321     This->width = uiWidth;
 322     This->height = uiHeight;
 323     This->mode = mode;
 324
 325     hr = IWICBitmapSource_GetSize(pISource, &This->src_width, &This->src_height);
 326
 327     if (SUCCEEDED(hr))
 328         hr = IWICBitmapSource_GetPixelFormat(pISource, &src_pixelformat);
 329
 330     if (SUCCEEDED(hr))
 331     {
 332         hr = get_pixelformat_bpp(&src_pixelformat, &This->bpp);
 333     }
 334
 335     if (SUCCEEDED(hr))
 336     {
 337         switch (mode)
 338         {
 339         default:
 340             FIXME("unsupported mode %i\n", mode);
 341             /* fall-through */
 342         case WICBitmapInterpolationModeNearestNeighbor:
 343             if ((This->bpp % 8) == 0)
 344             {
 345                 IWICBitmapSource_AddRef(pISource);
 346                 This->source = pISource;
 347             }
 348             else
 349             {
 350                 hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA,
 351                     pISource, &This->source);
 352                 This->bpp = 32;
 353             }
 354             This->fn_get_required_source_rect = NearestNeighbor_GetRequiredSourceRect;
 355             This->fn_copy_scanline = NearestNeighbor_CopyScanline;
 356             break;
 357         }
 358     }
 359
 360 end:
 361     LeaveCriticalSection(&This->lock);
 362
 363     return hr;
 364 }
 365
 366 static const IWICBitmapScalerVtbl BitmapScaler_Vtbl = {
 367     BitmapScaler_QueryInterface,
 368     BitmapScaler_AddRef,
 369     BitmapScaler_Release,
 370     BitmapScaler_GetSize,
 371     BitmapScaler_GetPixelFormat,
 372     BitmapScaler_GetResolution,
 373     BitmapScaler_CopyPalette,
 374     BitmapScaler_CopyPixels,
 375     BitmapScaler_Initialize
 376 };
 377
 378 HRESULT BitmapScaler_Create(IWICBitmapScaler **scaler)
 379 {
 380     BitmapScaler *This;
 381
 382     This = HeapAlloc(GetProcessHeap(), 0, sizeof(BitmapScaler));
 383     if (!This) return E_OUTOFMEMORY;
 384
 385     This->IWICBitmapScaler_iface.lpVtbl = &BitmapScaler_Vtbl;
 386     This->ref = 1;
 387     This->source = NULL;
 388     This->width = 0;
 389     This->height = 0;
 390     This->src_width = 0;
 391     This->src_height = 0;
 392     This->mode = 0;
 393     This->bpp = 0;
 394     InitializeCriticalSection(&This->lock);
 395     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BitmapScaler.lock");
 396
 397     *scaler = &This->IWICBitmapScaler_iface;
 398
 399     return S_OK;
 400 }