dlls/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 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  22
  23 /*****************************************************************************
  24  * IDirectDrawPalette::QueryInterface
  25  *
  26  * A usual QueryInterface implementation. Can only Query IUnknown and
  27  * IDirectDrawPalette
  28  *
  29  * Params:
  30  *  refiid: The interface id queried for
  31  *  obj: Address to return the interface pointer at
  32  *
  33  * Returns:
  34  *  S_OK on success
  35  *  E_NOINTERFACE if the requested interface wasn't found
  36  *****************************************************************************/
  37 static HRESULT WINAPI ddraw_palette_QueryInterface(IDirectDrawPalette *iface, REFIID refiid, void **obj)
  38 {
  39     TRACE("iface %p, riid %s, object %p.\n", iface, debugstr_guid(refiid), obj);
  40
  41     if (IsEqualGUID(refiid, &IID_IUnknown)
  42         || IsEqualGUID(refiid, &IID_IDirectDrawPalette))
  43     {
  44         *obj = iface;
  45         IDirectDrawPalette_AddRef(iface);
  46         return S_OK;
  47     }
  48     else
  49     {
  50         *obj = NULL;
  51         return E_NOINTERFACE;
  52     }
  53 }
  54
  55 /*****************************************************************************
  56  * IDirectDrawPaletteImpl::AddRef
  57  *
  58  * Increases the refcount.
  59  *
  60  * Returns:
  61  *  The new refcount
  62  *
  63  *****************************************************************************/
  64 static ULONG WINAPI ddraw_palette_AddRef(IDirectDrawPalette *iface)
  65 {
  66     struct ddraw_palette *This = impl_from_IDirectDrawPalette(iface);
  67     ULONG ref = InterlockedIncrement(&This->ref);
  68
  69     TRACE("%p increasing refcount to %u.\n", This, ref);
  70
  71     return ref;
  72 }
  73
  74 /*****************************************************************************
  75  * IDirectDrawPaletteImpl::Release
  76  *
  77  * Reduces the refcount. If the refcount falls to 0, the object is destroyed
  78  *
  79  * Returns:
  80  *  The new refcount
  81  *
  82  *****************************************************************************/
  83 static ULONG WINAPI ddraw_palette_Release(IDirectDrawPalette *iface)
  84 {
  85     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
  86     ULONG ref = InterlockedDecrement(&palette->ref);
  87
  88     TRACE("%p decreasing refcount to %u.\n", palette, ref);
  89
  90     if (ref == 0)
  91     {
  92         wined3d_mutex_lock();
  93         wined3d_palette_decref(palette->wined3d_palette);
  94         if ((palette->flags & DDPCAPS_PRIMARYSURFACE) && palette->ddraw->primary)
  95             palette->ddraw->primary->palette = NULL;
  96         if (palette->ifaceToRelease)
  97             IUnknown_Release(palette->ifaceToRelease);
  98         wined3d_mutex_unlock();
  99
 100         heap_free(palette);
 101     }
 102
 103     return ref;
 104 }
 105
 106 /*****************************************************************************
 107  * IDirectDrawPalette::Initialize
 108  *
 109  * Initializes the palette. As we start initialized, return
 110  * DDERR_ALREADYINITIALIZED
 111  *
 112  * Params:
 113  *  DD: DirectDraw interface this palette is assigned to
 114  *  Flags: Some flags, as usual
 115  *  ColorTable: The startup color table
 116  *
 117  * Returns:
 118  *  DDERR_ALREADYINITIALIZED
 119  *
 120  *****************************************************************************/
 121 static HRESULT WINAPI ddraw_palette_Initialize(IDirectDrawPalette *iface,
 122         IDirectDraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 123 {
 124     TRACE("iface %p, ddraw %p, flags %#x, entries %p.\n",
 125             iface, ddraw, flags, entries);
 126
 127     return DDERR_ALREADYINITIALIZED;
 128 }
 129
 130 static HRESULT WINAPI ddraw_palette_GetCaps(IDirectDrawPalette *iface, DWORD *caps)
 131 {
 132     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 133
 134     TRACE("iface %p, caps %p.\n", iface, caps);
 135
 136     wined3d_mutex_lock();
 137     *caps = palette->flags;
 138     wined3d_mutex_unlock();
 139
 140     return D3D_OK;
 141 }
 142
 143 /*****************************************************************************
 144  * IDirectDrawPalette::SetEntries
 145  *
 146  * Sets the palette entries from a PALETTEENTRY structure. WineD3D takes
 147  * care for updating the surface.
 148  *
 149  * Params:
 150  *  Flags: Flags, as usual
 151  *  Start: First palette entry to set
 152  *  Count: Number of entries to set
 153  *  PalEnt: Source entries
 154  *
 155  * Returns:
 156  *  D3D_OK on success
 157  *  DDERR_INVALIDPARAMS if PalEnt is NULL
 158  *
 159  *****************************************************************************/
 160 static HRESULT WINAPI ddraw_palette_SetEntries(IDirectDrawPalette *iface,
 161         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 162 {
 163     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 164     HRESULT hr;
 165
 166     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
 167             iface, flags, start, count, entries);
 168
 169     if (!entries)
 170         return DDERR_INVALIDPARAMS;
 171
 172     wined3d_mutex_lock();
 173     hr = wined3d_palette_set_entries(palette->wined3d_palette, flags, start, count, entries);
 174
 175     if (SUCCEEDED(hr) && palette->flags & DDPCAPS_PRIMARYSURFACE)
 176         ddraw_surface_update_frontbuffer(palette->ddraw->primary, NULL, FALSE, 0);
 177
 178     wined3d_mutex_unlock();
 179
 180     return hr;
 181 }
 182
 183 /*****************************************************************************
 184  * IDirectDrawPalette::GetEntries
 185  *
 186  * Returns the entries stored in this interface.
 187  *
 188  * Params:
 189  *  Flags: Flags :)
 190  *  Start: First entry to return
 191  *  Count: The number of entries to return
 192  *  PalEnt: PALETTEENTRY structure to write the entries to
 193  *
 194  * Returns:
 195  *  D3D_OK on success
 196  *  DDERR_INVALIDPARAMS if PalEnt is NULL
 197  *
 198  *****************************************************************************/
 199 static HRESULT WINAPI ddraw_palette_GetEntries(IDirectDrawPalette *iface,
 200         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 201 {
 202     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 203     HRESULT hr;
 204
 205     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
 206             iface, flags, start, count, entries);
 207
 208     if (!entries)
 209         return DDERR_INVALIDPARAMS;
 210
 211     wined3d_mutex_lock();
 212     hr = wined3d_palette_get_entries(palette->wined3d_palette, flags, start, count, entries);
 213     wined3d_mutex_unlock();
 214
 215     return hr;
 216 }
 217
 218 /* Some windowed mode wrappers expect this vtbl to be writable. */
 219 static struct IDirectDrawPaletteVtbl ddraw_palette_vtbl =
 220 {
 221     /*** IUnknown ***/
 222     ddraw_palette_QueryInterface,
 223     ddraw_palette_AddRef,
 224     ddraw_palette_Release,
 225     /*** IDirectDrawPalette ***/
 226     ddraw_palette_GetCaps,
 227     ddraw_palette_GetEntries,
 228     ddraw_palette_Initialize,
 229     ddraw_palette_SetEntries
 230 };
 231
 232 struct ddraw_palette *unsafe_impl_from_IDirectDrawPalette(IDirectDrawPalette *iface)
 233 {
 234     if (!iface) return NULL;
 235     assert(iface->lpVtbl == &ddraw_palette_vtbl);
 236     return CONTAINING_RECORD(iface, struct ddraw_palette, IDirectDrawPalette_iface);
 237 }
 238
 239 static unsigned int palette_size(DWORD flags)
 240 {
 241     switch (flags & (DDPCAPS_1BIT | DDPCAPS_2BIT | DDPCAPS_4BIT | DDPCAPS_8BIT))
 242     {
 243         case DDPCAPS_1BIT:
 244             return 2;
 245         case DDPCAPS_2BIT:
 246             return 4;
 247         case DDPCAPS_4BIT:
 248             return 16;
 249         case DDPCAPS_8BIT:
 250             return 256;
 251         default:
 252             return ~0u;
 253     }
 254 }
 255
 256 HRESULT ddraw_palette_init(struct ddraw_palette *palette,
 257         struct ddraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 258 {
 259     unsigned int entry_count;
 260     DWORD wined3d_flags = 0;
 261     HRESULT hr;
 262
 263     if ((entry_count = palette_size(flags)) == ~0u)
 264     {
 265         WARN("Invalid flags %#x.\n", flags);
 266         return DDERR_INVALIDPARAMS;
 267     }
 268
 269     if (flags & DDPCAPS_8BITENTRIES)
 270         wined3d_flags |= WINED3D_PALETTE_8BIT_ENTRIES;
 271     if (flags & DDPCAPS_ALLOW256)
 272         wined3d_flags |= WINED3D_PALETTE_ALLOW_256;
 273     if (flags & DDPCAPS_ALPHA)
 274         wined3d_flags |= WINED3D_PALETTE_ALPHA;
 275
 276     palette->IDirectDrawPalette_iface.lpVtbl = &ddraw_palette_vtbl;
 277     palette->ref = 1;
 278     palette->flags = flags;
 279
 280     if (FAILED(hr = wined3d_palette_create(ddraw->wined3d_device,
 281             wined3d_flags, entry_count, entries, &palette->wined3d_palette)))
 282     {
 283         WARN("Failed to create wined3d palette, hr %#x.\n", hr);
 284         return hr;
 285     }
 286
 287     palette->ddraw = ddraw;
 288     palette->ifaceToRelease = (IUnknown *)&ddraw->IDirectDraw7_iface;
 289     IUnknown_AddRef(palette->ifaceToRelease);
 290
 291     return DD_OK;
 292 }