reactos/dll/directx/wine/ddraw/palette.c

   1 /*
   2  * Copyright 2006 Stefan Dösinger
   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 "ddraw_private.h"
  20
  21 /*****************************************************************************
  22  * IDirectDrawPalette::QueryInterface
  23  *
  24  * A usual QueryInterface implementation. Can only Query IUnknown and
  25  * IDirectDrawPalette
  26  *
  27  * Params:
  28  *  refiid: The interface id queried for
  29  *  obj: Address to return the interface pointer at
  30  *
  31  * Returns:
  32  *  S_OK on success
  33  *  E_NOINTERFACE if the requested interface wasn't found
  34  *****************************************************************************/
  35 static HRESULT WINAPI ddraw_palette_QueryInterface(IDirectDrawPalette *iface, REFIID refiid, void **obj)
  36 {
  37     TRACE("iface %p, riid %s, object %p.\n", iface, debugstr_guid(refiid), obj);
  38
  39     if (IsEqualGUID(refiid, &IID_IUnknown)
  40         || IsEqualGUID(refiid, &IID_IDirectDrawPalette))
  41     {
  42         *obj = iface;
  43         IDirectDrawPalette_AddRef(iface);
  44         return S_OK;
  45     }
  46     else
  47     {
  48         *obj = NULL;
  49         return E_NOINTERFACE;
  50     }
  51 }
  52
  53 /*****************************************************************************
  54  * IDirectDrawPaletteImpl::AddRef
  55  *
  56  * Increases the refcount.
  57  *
  58  * Returns:
  59  *  The new refcount
  60  *
  61  *****************************************************************************/
  62 static ULONG WINAPI ddraw_palette_AddRef(IDirectDrawPalette *iface)
  63 {
  64     struct ddraw_palette *This = impl_from_IDirectDrawPalette(iface);
  65     ULONG ref = InterlockedIncrement(&This->ref);
  66
  67     TRACE("%p increasing refcount to %u.\n", This, ref);
  68
  69     return ref;
  70 }
  71
  72 /*****************************************************************************
  73  * IDirectDrawPaletteImpl::Release
  74  *
  75  * Reduces the refcount. If the refcount falls to 0, the object is destroyed
  76  *
  77  * Returns:
  78  *  The new refcount
  79  *
  80  *****************************************************************************/
  81 static ULONG WINAPI ddraw_palette_Release(IDirectDrawPalette *iface)
  82 {
  83     struct ddraw_palette *This = impl_from_IDirectDrawPalette(iface);
  84     ULONG ref = InterlockedDecrement(&This->ref);
  85
  86     TRACE("%p decreasing refcount to %u.\n", This, ref);
  87
  88     if (ref == 0)
  89     {
  90         wined3d_mutex_lock();
  91         wined3d_palette_decref(This->wineD3DPalette);
  92         if ((This->flags & DDPCAPS_PRIMARYSURFACE) && This->ddraw->primary)
  93             This->ddraw->primary->palette = NULL;
  94         if (This->ifaceToRelease)
  95             IUnknown_Release(This->ifaceToRelease);
  96         wined3d_mutex_unlock();
  97
  98         HeapFree(GetProcessHeap(), 0, This);
  99     }
 100
 101     return ref;
 102 }
 103
 104 /*****************************************************************************
 105  * IDirectDrawPalette::Initialize
 106  *
 107  * Initializes the palette. As we start initialized, return
 108  * DDERR_ALREADYINITIALIZED
 109  *
 110  * Params:
 111  *  DD: DirectDraw interface this palette is assigned to
 112  *  Flags: Some flags, as usual
 113  *  ColorTable: The startup color table
 114  *
 115  * Returns:
 116  *  DDERR_ALREADYINITIALIZED
 117  *
 118  *****************************************************************************/
 119 static HRESULT WINAPI ddraw_palette_Initialize(IDirectDrawPalette *iface,
 120         IDirectDraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 121 {
 122     TRACE("iface %p, ddraw %p, flags %#x, entries %p.\n",
 123             iface, ddraw, flags, entries);
 124
 125     return DDERR_ALREADYINITIALIZED;
 126 }
 127
 128 static HRESULT WINAPI ddraw_palette_GetCaps(IDirectDrawPalette *iface, DWORD *caps)
 129 {
 130     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 131
 132     TRACE("iface %p, caps %p.\n", iface, caps);
 133
 134     wined3d_mutex_lock();
 135     *caps = palette->flags;
 136     wined3d_mutex_unlock();
 137
 138     return D3D_OK;
 139 }
 140
 141 /*****************************************************************************
 142  * IDirectDrawPalette::SetEntries
 143  *
 144  * Sets the palette entries from a PALETTEENTRY structure. WineD3D takes
 145  * care for updating the surface.
 146  *
 147  * Params:
 148  *  Flags: Flags, as usual
 149  *  Start: First palette entry to set
 150  *  Count: Number of entries to set
 151  *  PalEnt: Source entries
 152  *
 153  * Returns:
 154  *  D3D_OK on success
 155  *  DDERR_INVALIDPARAMS if PalEnt is NULL
 156  *  For details, see IWineD3DDevice::SetEntries
 157  *
 158  *****************************************************************************/
 159 static HRESULT WINAPI ddraw_palette_SetEntries(IDirectDrawPalette *iface,
 160         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 161 {
 162     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 163     HRESULT hr;
 164
 165     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
 166             iface, flags, start, count, entries);
 167
 168     if (!entries)
 169         return DDERR_INVALIDPARAMS;
 170
 171     wined3d_mutex_lock();
 172     hr = wined3d_palette_set_entries(palette->wineD3DPalette, flags, start, count, entries);
 173     wined3d_mutex_unlock();
 174
 175     return hr;
 176 }
 177
 178 /*****************************************************************************
 179  * IDirectDrawPalette::GetEntries
 180  *
 181  * Returns the entries stored in this interface.
 182  *
 183  * Params:
 184  *  Flags: Flags :)
 185  *  Start: First entry to return
 186  *  Count: The number of entries to return
 187  *  PalEnt: PALETTEENTRY structure to write the entries to
 188  *
 189  * Returns:
 190  *  D3D_OK on success
 191  *  DDERR_INVALIDPARAMS if PalEnt is NULL
 192  *  For details, see IWineD3DDevice::SetEntries
 193  *
 194  *****************************************************************************/
 195 static HRESULT WINAPI ddraw_palette_GetEntries(IDirectDrawPalette *iface,
 196         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 197 {
 198     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 199     HRESULT hr;
 200
 201     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
 202             iface, flags, start, count, entries);
 203
 204     if (!entries)
 205         return DDERR_INVALIDPARAMS;
 206
 207     wined3d_mutex_lock();
 208     hr = wined3d_palette_get_entries(palette->wineD3DPalette, flags, start, count, entries);
 209     wined3d_mutex_unlock();
 210
 211     return hr;
 212 }
 213
 214 static const struct IDirectDrawPaletteVtbl ddraw_palette_vtbl =
 215 {
 216     /*** IUnknown ***/
 217     ddraw_palette_QueryInterface,
 218     ddraw_palette_AddRef,
 219     ddraw_palette_Release,
 220     /*** IDirectDrawPalette ***/
 221     ddraw_palette_GetCaps,
 222     ddraw_palette_GetEntries,
 223     ddraw_palette_Initialize,
 224     ddraw_palette_SetEntries
 225 };
 226
 227 struct ddraw_palette *unsafe_impl_from_IDirectDrawPalette(IDirectDrawPalette *iface)
 228 {
 229     if (!iface) return NULL;
 230     assert(iface->lpVtbl == &ddraw_palette_vtbl);
 231     return CONTAINING_RECORD(iface, struct ddraw_palette, IDirectDrawPalette_iface);
 232 }
 233
 234 static unsigned int palette_size(DWORD flags)
 235 {
 236     switch (flags & (DDPCAPS_1BIT | DDPCAPS_2BIT | DDPCAPS_4BIT | DDPCAPS_8BIT))
 237     {
 238         case DDPCAPS_1BIT:
 239             return 2;
 240         case DDPCAPS_2BIT:
 241             return 4;
 242         case DDPCAPS_4BIT:
 243             return 16;
 244         case DDPCAPS_8BIT:
 245             return 256;
 246         default:
 247             return ~0u;
 248     }
 249 }
 250
 251 HRESULT ddraw_palette_init(struct ddraw_palette *palette,
 252         struct ddraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 253 {
 254     unsigned int entry_count;
 255     DWORD wined3d_flags = 0;
 256     HRESULT hr;
 257
 258     if ((entry_count = palette_size(flags)) == ~0u)
 259     {
 260         WARN("Invalid flags %#x.\n", flags);
 261         return DDERR_INVALIDPARAMS;
 262     }
 263
 264     if (flags & DDPCAPS_8BITENTRIES)
 265         wined3d_flags |= WINED3D_PALETTE_8BIT_ENTRIES;
 266     if (flags & DDPCAPS_ALLOW256)
 267         wined3d_flags |= WINED3D_PALETTE_ALLOW_256;
 268     if (flags & DDPCAPS_ALPHA)
 269         wined3d_flags |= WINED3D_PALETTE_ALPHA;
 270
 271     palette->IDirectDrawPalette_iface.lpVtbl = &ddraw_palette_vtbl;
 272     palette->ref = 1;
 273     palette->flags = flags;
 274
 275     if (FAILED(hr = wined3d_palette_create(ddraw->wined3d_device,
 276             wined3d_flags, entry_count, entries, &palette->wineD3DPalette)))
 277     {
 278         WARN("Failed to create wined3d palette, hr %#x.\n", hr);
 279         return hr;
 280     }
 281
 282     palette->ddraw = ddraw;
 283     palette->ifaceToRelease = (IUnknown *)&ddraw->IDirectDraw7_iface;
 284     IUnknown_AddRef(palette->ifaceToRelease);
 285
 286     return DD_OK;
 287 }