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 "config.h"
  20 #include "wine/port.h"
  21
  22 #include "ddraw_private.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  25
  26 /*****************************************************************************
  27  * IDirectDrawPalette::QueryInterface
  28  *
  29  * A usual QueryInterface implementation. Can only Query IUnknown and
  30  * IDirectDrawPalette
  31  *
  32  * Params:
  33  *  refiid: The interface id queried for
  34  *  obj: Address to return the interface pointer at
  35  *
  36  * Returns:
  37  *  S_OK on success
  38  *  E_NOINTERFACE if the requested interface wasn't found
  39  *****************************************************************************/
  40 static HRESULT WINAPI ddraw_palette_QueryInterface(IDirectDrawPalette *iface, REFIID refiid, void **obj)
  41 {
  42     TRACE("iface %p, riid %s, object %p.\n", iface, debugstr_guid(refiid), obj);
  43
  44     if (IsEqualGUID(refiid, &IID_IUnknown)
  45         || IsEqualGUID(refiid, &IID_IDirectDrawPalette))
  46     {
  47         *obj = iface;
  48         IDirectDrawPalette_AddRef(iface);
  49         return S_OK;
  50     }
  51     else
  52     {
  53         *obj = NULL;
  54         return E_NOINTERFACE;
  55     }
  56 }
  57
  58 /*****************************************************************************
  59  * IDirectDrawPaletteImpl::AddRef
  60  *
  61  * Increases the refcount.
  62  *
  63  * Returns:
  64  *  The new refcount
  65  *
  66  *****************************************************************************/
  67 static ULONG WINAPI ddraw_palette_AddRef(IDirectDrawPalette *iface)
  68 {
  69     struct ddraw_palette *This = impl_from_IDirectDrawPalette(iface);
  70     ULONG ref = InterlockedIncrement(&This->ref);
  71
  72     TRACE("%p increasing refcount to %u.\n", This, ref);
  73
  74     return ref;
  75 }
  76
  77 /*****************************************************************************
  78  * IDirectDrawPaletteImpl::Release
  79  *
  80  * Reduces the refcount. If the refcount falls to 0, the object is destroyed
  81  *
  82  * Returns:
  83  *  The new refcount
  84  *
  85  *****************************************************************************/
  86 static ULONG WINAPI ddraw_palette_Release(IDirectDrawPalette *iface)
  87 {
  88     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
  89     ULONG ref = InterlockedDecrement(&palette->ref);
  90
  91     TRACE("%p decreasing refcount to %u.\n", palette, ref);
  92
  93     if (ref == 0)
  94     {
  95         wined3d_mutex_lock();
  96         wined3d_palette_decref(palette->wined3d_palette);
  97         if ((palette->flags & DDPCAPS_PRIMARYSURFACE) && palette->ddraw->primary)
  98             palette->ddraw->primary->palette = NULL;
  99         if (palette->ifaceToRelease)
 100             IUnknown_Release(palette->ifaceToRelease);
 101         wined3d_mutex_unlock();
 102
 103         heap_free(palette);
 104     }
 105
 106     return ref;
 107 }
 108
 109 /*****************************************************************************
 110  * IDirectDrawPalette::Initialize
 111  *
 112  * Initializes the palette. As we start initialized, return
 113  * DDERR_ALREADYINITIALIZED
 114  *
 115  * Params:
 116  *  DD: DirectDraw interface this palette is assigned to
 117  *  Flags: Some flags, as usual
 118  *  ColorTable: The startup color table
 119  *
 120  * Returns:
 121  *  DDERR_ALREADYINITIALIZED
 122  *
 123  *****************************************************************************/
 124 static HRESULT WINAPI ddraw_palette_Initialize(IDirectDrawPalette *iface,
 125         IDirectDraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 126 {
 127     TRACE("iface %p, ddraw %p, flags %#x, entries %p.\n",
 128             iface, ddraw, flags, entries);
 129
 130     return DDERR_ALREADYINITIALIZED;
 131 }
 132
 133 static HRESULT WINAPI ddraw_palette_GetCaps(IDirectDrawPalette *iface, DWORD *caps)
 134 {
 135     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 136
 137     TRACE("iface %p, caps %p.\n", iface, caps);
 138
 139     wined3d_mutex_lock();
 140     *caps = palette->flags;
 141     wined3d_mutex_unlock();
 142
 143     return D3D_OK;
 144 }
 145
 146 /*****************************************************************************
 147  * IDirectDrawPalette::SetEntries
 148  *
 149  * Sets the palette entries from a PALETTEENTRY structure. WineD3D takes
 150  * care for updating the surface.
 151  *
 152  * Params:
 153  *  Flags: Flags, as usual
 154  *  Start: First palette entry to set
 155  *  Count: Number of entries to set
 156  *  PalEnt: Source entries
 157  *
 158  * Returns:
 159  *  D3D_OK on success
 160  *  DDERR_INVALIDPARAMS if PalEnt is NULL
 161  *
 162  *****************************************************************************/
 163 static HRESULT WINAPI ddraw_palette_SetEntries(IDirectDrawPalette *iface,
 164         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 165 {
 166     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 167     HRESULT hr;
 168
 169     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
 170             iface, flags, start, count, entries);
 171
 172     if (!entries)
 173         return DDERR_INVALIDPARAMS;
 174
 175     wined3d_mutex_lock();
 176     hr = wined3d_palette_set_entries(palette->wined3d_palette, flags, start, count, entries);
 177
 178     if (SUCCEEDED(hr) && palette->flags & DDPCAPS_PRIMARYSURFACE)
 179         ddraw_surface_update_frontbuffer(palette->ddraw->primary, NULL, FALSE, 0);
 180
 181     wined3d_mutex_unlock();
 182
 183     return hr;
 184 }
 185
 186 /*****************************************************************************
 187  * IDirectDrawPalette::GetEntries
 188  *
 189  * Returns the entries stored in this interface.
 190  *
 191  * Params:
 192  *  Flags: Flags :)
 193  *  Start: First entry to return
 194  *  Count: The number of entries to return
 195  *  PalEnt: PALETTEENTRY structure to write the entries to
 196  *
 197  * Returns:
 198  *  D3D_OK on success
 199  *  DDERR_INVALIDPARAMS if PalEnt is NULL
 200  *
 201  *****************************************************************************/
 202 static HRESULT WINAPI ddraw_palette_GetEntries(IDirectDrawPalette *iface,
 203         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 204 {
 205     struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 206     HRESULT hr;
 207
 208     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
 209             iface, flags, start, count, entries);
 210
 211     if (!entries)
 212         return DDERR_INVALIDPARAMS;
 213
 214     wined3d_mutex_lock();
 215     hr = wined3d_palette_get_entries(palette->wined3d_palette, flags, start, count, entries);
 216     wined3d_mutex_unlock();
 217
 218     return hr;
 219 }
 220
 221 static const struct IDirectDrawPaletteVtbl ddraw_palette_vtbl =
 222 {
 223     /*** IUnknown ***/
 224     ddraw_palette_QueryInterface,
 225     ddraw_palette_AddRef,
 226     ddraw_palette_Release,
 227     /*** IDirectDrawPalette ***/
 228     ddraw_palette_GetCaps,
 229     ddraw_palette_GetEntries,
 230     ddraw_palette_Initialize,
 231     ddraw_palette_SetEntries
 232 };
 233
 234 struct ddraw_palette *unsafe_impl_from_IDirectDrawPalette(IDirectDrawPalette *iface)
 235 {
 236     if (!iface) return NULL;
 237     assert(iface->lpVtbl == &ddraw_palette_vtbl);
 238     return CONTAINING_RECORD(iface, struct ddraw_palette, IDirectDrawPalette_iface);
 239 }
 240
 241 static unsigned int palette_size(DWORD flags)
 242 {
 243     switch (flags & (DDPCAPS_1BIT | DDPCAPS_2BIT | DDPCAPS_4BIT | DDPCAPS_8BIT))
 244     {
 245         case DDPCAPS_1BIT:
 246             return 2;
 247         case DDPCAPS_2BIT:
 248             return 4;
 249         case DDPCAPS_4BIT:
 250             return 16;
 251         case DDPCAPS_8BIT:
 252             return 256;
 253         default:
 254             return ~0u;
 255     }
 256 }
 257
 258 HRESULT ddraw_palette_init(struct ddraw_palette *palette,
 259         struct ddraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 260 {
 261     unsigned int entry_count;
 262     DWORD wined3d_flags = 0;
 263     HRESULT hr;
 264
 265     if ((entry_count = palette_size(flags)) == ~0u)
 266     {
 267         WARN("Invalid flags %#x.\n", flags);
 268         return DDERR_INVALIDPARAMS;
 269     }
 270
 271     if (flags & DDPCAPS_8BITENTRIES)
 272         wined3d_flags |= WINED3D_PALETTE_8BIT_ENTRIES;
 273     if (flags & DDPCAPS_ALLOW256)
 274         wined3d_flags |= WINED3D_PALETTE_ALLOW_256;
 275     if (flags & DDPCAPS_ALPHA)
 276         wined3d_flags |= WINED3D_PALETTE_ALPHA;
 277
 278     palette->IDirectDrawPalette_iface.lpVtbl = &ddraw_palette_vtbl;
 279     palette->ref = 1;
 280     palette->flags = flags;
 281
 282     if (FAILED(hr = wined3d_palette_create(ddraw->wined3d_device,
 283             wined3d_flags, entry_count, entries, &palette->wined3d_palette)))
 284     {
 285         WARN("Failed to create wined3d palette, hr %#x.\n", hr);
 286         return hr;
 287     }
 288
 289     palette->ddraw = ddraw;
 290     palette->ifaceToRelease = (IUnknown *)&ddraw->IDirectDraw7_iface;
 291     IUnknown_AddRef(palette->ifaceToRelease);
 292
 293     return DD_OK;
 294 }