dlls/windowscodecs/palette.c

   1 /*
   2  * Copyright 2009 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 "winreg.h"
  28 #include "objbase.h"
  29 #include "wincodec.h"
  30
  31 #include "wincodecs_private.h"
  32
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  36
  37 typedef struct {
  38     const IWICPaletteVtbl *lpIWICPaletteVtbl;
  39     LONG ref;
  40     UINT count;
  41     WICColor *colors;
  42     WICBitmapPaletteType type;
  43     CRITICAL_SECTION lock; /* must be held when count, colors, or type is accessed */
  44 } PaletteImpl;
  45
  46 static HRESULT WINAPI PaletteImpl_QueryInterface(IWICPalette *iface, REFIID iid,
  47     void **ppv)
  48 {
  49     PaletteImpl *This = (PaletteImpl*)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) || IsEqualIID(&IID_IWICPalette, iid))
  55     {
  56         *ppv = This;
  57     }
  58     else
  59     {
  60         *ppv = NULL;
  61         return E_NOINTERFACE;
  62     }
  63
  64     IUnknown_AddRef((IUnknown*)*ppv);
  65     return S_OK;
  66 }
  67
  68 static ULONG WINAPI PaletteImpl_AddRef(IWICPalette *iface)
  69 {
  70     PaletteImpl *This = (PaletteImpl*)iface;
  71     ULONG ref = InterlockedIncrement(&This->ref);
  72
  73     TRACE("(%p) refcount=%u\n", iface, ref);
  74
  75     return ref;
  76 }
  77
  78 static ULONG WINAPI PaletteImpl_Release(IWICPalette *iface)
  79 {
  80     PaletteImpl *This = (PaletteImpl*)iface;
  81     ULONG ref = InterlockedDecrement(&This->ref);
  82
  83     TRACE("(%p) refcount=%u\n", iface, ref);
  84
  85     if (ref == 0)
  86     {
  87         This->lock.DebugInfo->Spare[0] = 0;
  88         DeleteCriticalSection(&This->lock);
  89         HeapFree(GetProcessHeap(), 0, This->colors);
  90         HeapFree(GetProcessHeap(), 0, This);
  91     }
  92
  93     return ref;
  94 }
  95
  96 static HRESULT WINAPI PaletteImpl_InitializePredefined(IWICPalette *iface,
  97     WICBitmapPaletteType ePaletteType, BOOL fAddTransparentColor)
  98 {
  99     FIXME("(%p,%u,%i): stub\n", iface, ePaletteType, fAddTransparentColor);
 100     return E_NOTIMPL;
 101 }
 102
 103 static HRESULT WINAPI PaletteImpl_InitializeCustom(IWICPalette *iface,
 104     WICColor *pColors, UINT colorCount)
 105 {
 106     PaletteImpl *This = (PaletteImpl*)iface;
 107     WICColor *new_colors;
 108
 109     TRACE("(%p,%p,%u)\n", iface, pColors, colorCount);
 110
 111     if (colorCount == 0)
 112     {
 113         new_colors = NULL;
 114     }
 115     else
 116     {
 117         if (!pColors) return E_INVALIDARG;
 118         new_colors = HeapAlloc(GetProcessHeap(), 0, sizeof(WICColor) * colorCount);
 119         if (!new_colors) return E_OUTOFMEMORY;
 120         memcpy(new_colors, pColors, sizeof(WICColor) * colorCount);
 121     }
 122
 123     EnterCriticalSection(&This->lock);
 124     HeapFree(GetProcessHeap(), 0, This->colors);
 125     This->colors = new_colors;
 126     This->count = colorCount;
 127     This->type = WICBitmapPaletteTypeCustom;
 128     LeaveCriticalSection(&This->lock);
 129
 130     return S_OK;
 131 }
 132
 133 static HRESULT WINAPI PaletteImpl_InitializeFromBitmap(IWICPalette *iface,
 134     IWICBitmapSource *pISurface, UINT colorCount, BOOL fAddTransparentColor)
 135 {
 136     FIXME("(%p,%p,%u,%i): stub\n", iface, pISurface, colorCount, fAddTransparentColor);
 137     return E_NOTIMPL;
 138 }
 139
 140 static HRESULT WINAPI PaletteImpl_InitializeFromPalette(IWICPalette *iface,
 141     IWICPalette *pIPalette)
 142 {
 143     FIXME("(%p,%p): stub\n", iface, pIPalette);
 144     return E_NOTIMPL;
 145 }
 146
 147 static HRESULT WINAPI PaletteImpl_GetType(IWICPalette *iface,
 148     WICBitmapPaletteType *pePaletteType)
 149 {
 150     PaletteImpl *This = (PaletteImpl*)iface;
 151
 152     TRACE("(%p,%p)\n", iface, pePaletteType);
 153
 154     if (!pePaletteType) return E_INVALIDARG;
 155
 156     EnterCriticalSection(&This->lock);
 157     *pePaletteType = This->type;
 158     LeaveCriticalSection(&This->lock);
 159
 160     return S_OK;
 161 }
 162
 163 static HRESULT WINAPI PaletteImpl_GetColorCount(IWICPalette *iface, UINT *pcCount)
 164 {
 165     PaletteImpl *This = (PaletteImpl*)iface;
 166
 167     TRACE("(%p,%p)\n", iface, pcCount);
 168
 169     if (!pcCount) return E_INVALIDARG;
 170
 171     EnterCriticalSection(&This->lock);
 172     *pcCount = This->count;
 173     LeaveCriticalSection(&This->lock);
 174
 175     return S_OK;
 176 }
 177
 178 static HRESULT WINAPI PaletteImpl_GetColors(IWICPalette *iface, UINT colorCount,
 179     WICColor *pColors, UINT *pcActualColors)
 180 {
 181     PaletteImpl *This = (PaletteImpl*)iface;
 182
 183     TRACE("(%p,%i,%p,%p)\n", iface, colorCount, pColors, pcActualColors);
 184
 185     if (!pColors || !pcActualColors) return E_INVALIDARG;
 186
 187     EnterCriticalSection(&This->lock);
 188
 189     if (This->count < colorCount) colorCount = This->count;
 190
 191     memcpy(pColors, This->colors, sizeof(WICColor) * colorCount);
 192
 193     *pcActualColors = colorCount;
 194
 195     LeaveCriticalSection(&This->lock);
 196
 197     return S_OK;
 198 }
 199
 200 static HRESULT WINAPI PaletteImpl_IsBlackWhite(IWICPalette *iface, BOOL *pfIsBlackWhite)
 201 {
 202     PaletteImpl *This = (PaletteImpl*)iface;
 203
 204     TRACE("(%p,%p)\n", iface, pfIsBlackWhite);
 205
 206     if (!pfIsBlackWhite) return E_INVALIDARG;
 207
 208     EnterCriticalSection(&This->lock);
 209     if (This->type == WICBitmapPaletteTypeFixedBW)
 210         *pfIsBlackWhite = TRUE;
 211     else
 212         *pfIsBlackWhite = FALSE;
 213     LeaveCriticalSection(&This->lock);
 214
 215     return S_OK;
 216 }
 217
 218 static HRESULT WINAPI PaletteImpl_IsGrayscale(IWICPalette *iface, BOOL *pfIsGrayscale)
 219 {
 220     PaletteImpl *This = (PaletteImpl*)iface;
 221
 222     TRACE("(%p,%p)\n", iface, pfIsGrayscale);
 223
 224     if (!pfIsGrayscale) return E_INVALIDARG;
 225
 226     EnterCriticalSection(&This->lock);
 227     switch(This->type)
 228     {
 229         case WICBitmapPaletteTypeFixedBW:
 230         case WICBitmapPaletteTypeFixedGray4:
 231         case WICBitmapPaletteTypeFixedGray16:
 232         case WICBitmapPaletteTypeFixedGray256:
 233             *pfIsGrayscale = TRUE;
 234             break;
 235         default:
 236             *pfIsGrayscale = FALSE;
 237     }
 238     LeaveCriticalSection(&This->lock);
 239
 240     return S_OK;
 241 }
 242
 243 static HRESULT WINAPI PaletteImpl_HasAlpha(IWICPalette *iface, BOOL *pfHasAlpha)
 244 {
 245     PaletteImpl *This = (PaletteImpl*)iface;
 246     int i;
 247
 248     TRACE("(%p,%p)\n", iface, pfHasAlpha);
 249
 250     if (!pfHasAlpha) return E_INVALIDARG;
 251
 252     *pfHasAlpha = FALSE;
 253
 254     EnterCriticalSection(&This->lock);
 255     for (i=0; i<This->count; i++)
 256         if ((This->colors[i]&0xff000000) != 0xff000000)
 257         {
 258             *pfHasAlpha = TRUE;
 259             break;
 260         }
 261     LeaveCriticalSection(&This->lock);
 262
 263     return S_OK;
 264 }
 265
 266 static const IWICPaletteVtbl PaletteImpl_Vtbl = {
 267     PaletteImpl_QueryInterface,
 268     PaletteImpl_AddRef,
 269     PaletteImpl_Release,
 270     PaletteImpl_InitializePredefined,
 271     PaletteImpl_InitializeCustom,
 272     PaletteImpl_InitializeFromBitmap,
 273     PaletteImpl_InitializeFromPalette,
 274     PaletteImpl_GetType,
 275     PaletteImpl_GetColorCount,
 276     PaletteImpl_GetColors,
 277     PaletteImpl_IsBlackWhite,
 278     PaletteImpl_IsGrayscale,
 279     PaletteImpl_HasAlpha
 280 };
 281
 282 HRESULT PaletteImpl_Create(IWICPalette **palette)
 283 {
 284     PaletteImpl *This;
 285
 286     This = HeapAlloc(GetProcessHeap(), 0, sizeof(PaletteImpl));
 287     if (!This) return E_OUTOFMEMORY;
 288
 289     This->lpIWICPaletteVtbl = &PaletteImpl_Vtbl;
 290     This->ref = 1;
 291     This->count = 0;
 292     This->colors = NULL;
 293     This->type = WICBitmapPaletteTypeCustom;
 294     InitializeCriticalSection(&This->lock);
 295     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PaletteImpl.lock");
 296
 297     *palette = (IWICPalette*)This;
 298
 299     return S_OK;
 300 }