2 * Copyright 2010 Vincent Povirk for CodeWeavers
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.
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.
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
30 #include "wincodecs_private.h"
32 #include "wine/debug.h"
34 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
36 typedef struct BitmapScaler {
37 IWICBitmapScaler IWICBitmapScaler_iface;
39 IWICBitmapSource *source;
41 UINT src_width, src_height;
42 WICBitmapInterpolationMode mode;
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 */
49 static inline BitmapScaler *impl_from_IWICBitmapScaler(IWICBitmapScaler *iface)
51 return CONTAINING_RECORD(iface, BitmapScaler, IWICBitmapScaler_iface);
54 static HRESULT WINAPI BitmapScaler_QueryInterface(IWICBitmapScaler *iface, REFIID iid,
57 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
58 TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
60 if (!ppv) return E_INVALIDARG;
62 if (IsEqualIID(&IID_IUnknown, iid) ||
63 IsEqualIID(&IID_IWICBitmapSource, iid) ||
64 IsEqualIID(&IID_IWICBitmapScaler, iid))
66 *ppv = &This->IWICBitmapScaler_iface;
74 IUnknown_AddRef((IUnknown*)*ppv);
78 static ULONG WINAPI BitmapScaler_AddRef(IWICBitmapScaler *iface)
80 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
81 ULONG ref = InterlockedIncrement(&This->ref);
83 TRACE("(%p) refcount=%u\n", iface, ref);
88 static ULONG WINAPI BitmapScaler_Release(IWICBitmapScaler *iface)
90 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
91 ULONG ref = InterlockedDecrement(&This->ref);
93 TRACE("(%p) refcount=%u\n", iface, ref);
97 This->lock.DebugInfo->Spare[0] = 0;
98 DeleteCriticalSection(&This->lock);
99 if (This->source) IWICBitmapSource_Release(This->source);
100 HeapFree(GetProcessHeap(), 0, This);
106 static HRESULT WINAPI BitmapScaler_GetSize(IWICBitmapScaler *iface,
107 UINT *puiWidth, UINT *puiHeight)
109 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
110 TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
112 if (!puiWidth || !puiHeight)
116 return WINCODEC_ERR_WRONGSTATE;
118 *puiWidth = This->width;
119 *puiHeight = This->height;
124 static HRESULT WINAPI BitmapScaler_GetPixelFormat(IWICBitmapScaler *iface,
125 WICPixelFormatGUID *pPixelFormat)
127 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
128 TRACE("(%p,%p)\n", iface, pPixelFormat);
134 return WINCODEC_ERR_WRONGSTATE;
136 return IWICBitmapSource_GetPixelFormat(This->source, pPixelFormat);
139 static HRESULT WINAPI BitmapScaler_GetResolution(IWICBitmapScaler *iface,
140 double *pDpiX, double *pDpiY)
142 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
143 TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
145 if (!pDpiX || !pDpiY)
149 return WINCODEC_ERR_WRONGSTATE;
151 return IWICBitmapSource_GetResolution(This->source, pDpiX, pDpiY);
154 static HRESULT WINAPI BitmapScaler_CopyPalette(IWICBitmapScaler *iface,
155 IWICPalette *pIPalette)
157 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
158 TRACE("(%p,%p)\n", iface, pIPalette);
164 return WINCODEC_ERR_WRONGSTATE;
166 return IWICBitmapSource_CopyPalette(This->source, pIPalette);
169 static void NearestNeighbor_GetRequiredSourceRect(BitmapScaler *This,
170 UINT x, UINT y, WICRect *src_rect)
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;
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)
182 UINT bytesperpixel = This->bpp/8;
185 src_y = dst_y * This->src_height / This->height - src_data_y;
187 for (i=0; i<dst_width; i++)
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);
194 static HRESULT WINAPI BitmapScaler_CopyPixels(IWICBitmapScaler *iface,
195 const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
197 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
200 WICRect src_rect_ul, src_rect_br, src_rect;
204 ULONG src_bytesperrow;
208 TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
210 EnterCriticalSection(&This->lock);
214 hr = WINCODEC_ERR_WRONGSTATE;
222 dest_rect.X = dest_rect.Y = 0;
223 dest_rect.Width = This->width;
224 dest_rect.Height = This->height;
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)
234 bytesperrow = ((This->bpp * dest_rect.Width)+7)/8;
236 if (cbStride < bytesperrow)
242 if ((cbStride * dest_rect.Height) > cbBufferSize)
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. */
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);
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;
265 src_bytesperrow = (src_rect.Width * This->bpp + 7)/8;
266 buffer_size = src_bytesperrow * src_rect.Height;
268 src_rows = HeapAlloc(GetProcessHeap(), 0, sizeof(BYTE*) * src_rect.Height);
269 src_bits = HeapAlloc(GetProcessHeap(), 0, buffer_size);
271 if (!src_rows || !src_bits)
273 HeapFree(GetProcessHeap(), 0, src_rows);
274 HeapFree(GetProcessHeap(), 0, src_bits);
279 for (y=0; y<src_rect.Height; y++)
280 src_rows[y] = src_bits + y * src_bytesperrow;
282 hr = IWICBitmapSource_CopyPixels(This->source, &src_rect, src_bytesperrow,
283 buffer_size, src_bits);
287 for (y=0; y < dest_rect.Height; y++)
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);
294 HeapFree(GetProcessHeap(), 0, src_rows);
295 HeapFree(GetProcessHeap(), 0, src_bits);
298 LeaveCriticalSection(&This->lock);
303 static HRESULT WINAPI BitmapScaler_Initialize(IWICBitmapScaler *iface,
304 IWICBitmapSource *pISource, UINT uiWidth, UINT uiHeight,
305 WICBitmapInterpolationMode mode)
307 BitmapScaler *This = impl_from_IWICBitmapScaler(iface);
309 GUID src_pixelformat;
311 TRACE("(%p,%p,%u,%u,%u)\n", iface, pISource, uiWidth, uiHeight, mode);
313 EnterCriticalSection(&This->lock);
317 hr = WINCODEC_ERR_WRONGSTATE;
321 This->width = uiWidth;
322 This->height = uiHeight;
325 hr = IWICBitmapSource_GetSize(pISource, &This->src_width, &This->src_height);
328 hr = IWICBitmapSource_GetPixelFormat(pISource, &src_pixelformat);
332 hr = get_pixelformat_bpp(&src_pixelformat, &This->bpp);
340 FIXME("unsupported mode %i\n", mode);
342 case WICBitmapInterpolationModeNearestNeighbor:
343 if ((This->bpp % 8) == 0)
345 IWICBitmapSource_AddRef(pISource);
346 This->source = pISource;
350 hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA,
351 pISource, &This->source);
354 This->fn_get_required_source_rect = NearestNeighbor_GetRequiredSourceRect;
355 This->fn_copy_scanline = NearestNeighbor_CopyScanline;
361 LeaveCriticalSection(&This->lock);
366 static const IWICBitmapScalerVtbl BitmapScaler_Vtbl = {
367 BitmapScaler_QueryInterface,
369 BitmapScaler_Release,
370 BitmapScaler_GetSize,
371 BitmapScaler_GetPixelFormat,
372 BitmapScaler_GetResolution,
373 BitmapScaler_CopyPalette,
374 BitmapScaler_CopyPixels,
375 BitmapScaler_Initialize
378 HRESULT BitmapScaler_Create(IWICBitmapScaler **scaler)
382 This = HeapAlloc(GetProcessHeap(), 0, sizeof(BitmapScaler));
383 if (!This) return E_OUTOFMEMORY;
385 This->IWICBitmapScaler_iface.lpVtbl = &BitmapScaler_Vtbl;
391 This->src_height = 0;
394 InitializeCriticalSection(&This->lock);
395 This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BitmapScaler.lock");
397 *scaler = &This->IWICBitmapScaler_iface;