dlls/wined3d/palette.c

   1 /*              DirectDraw - IDirectPalette base interface
   2  *
   3  * Copyright 1997-2000 Marcus Meissner
   4  * Copyright 2000-2001 TransGaming Technologies Inc.
   5  * Copyright 2006 Stefan Dösinger for CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21 #include "config.h"
  22 #include "winerror.h"
  23 #include "wine/debug.h"
  24
  25 #include <string.h>
  26
  27 #include "wined3d_private.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  30
  31 #define SIZE_BITS (WINEDDPCAPS_1BIT | WINEDDPCAPS_2BIT | WINEDDPCAPS_4BIT | WINEDDPCAPS_8BIT)
  32
  33 ULONG CDECL wined3d_palette_incref(struct wined3d_palette *palette)
  34 {
  35     ULONG refcount = InterlockedIncrement(&palette->ref);
  36
  37     TRACE("%p increasing refcount to %u.\n", palette, refcount);
  38
  39     return refcount;
  40 }
  41
  42 ULONG CDECL wined3d_palette_decref(struct wined3d_palette *palette)
  43 {
  44     ULONG refcount = InterlockedDecrement(&palette->ref);
  45
  46     TRACE("%p decreasing refcount to %u.\n", palette, refcount);
  47
  48     if (!refcount)
  49     {
  50         DeleteObject(palette->hpal);
  51         HeapFree(GetProcessHeap(), 0, palette);
  52     }
  53
  54     return refcount;
  55 }
  56
  57 static WORD wined3d_palette_size(DWORD flags)
  58 {
  59     switch (flags & SIZE_BITS)
  60     {
  61         case WINEDDPCAPS_1BIT: return 2;
  62         case WINEDDPCAPS_2BIT: return 4;
  63         case WINEDDPCAPS_4BIT: return 16;
  64         case WINEDDPCAPS_8BIT: return 256;
  65         default:
  66             FIXME("Unhandled size bits %#x.\n", flags & SIZE_BITS);
  67             return 256;
  68     }
  69 }
  70
  71 HRESULT CDECL wined3d_palette_get_entries(const struct wined3d_palette *palette,
  72         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
  73 {
  74     TRACE("palette %p, flags %#x, start %u, count %u, entries %p.\n",
  75             palette, flags, start, count, entries);
  76
  77     if (flags) return WINED3DERR_INVALIDCALL; /* unchecked */
  78     if (start + count > wined3d_palette_size(palette->flags))
  79         return WINED3DERR_INVALIDCALL;
  80
  81     if (palette->flags & WINEDDPCAPS_8BITENTRIES)
  82     {
  83         BYTE *entry = (BYTE *)entries;
  84         unsigned int i;
  85
  86         for (i = start; i < count + start; ++i)
  87             *entry++ = palette->palents[i].peRed;
  88     }
  89     else
  90         memcpy(entries, palette->palents + start, count * sizeof(*entries));
  91
  92     return WINED3D_OK;
  93 }
  94
  95 HRESULT CDECL wined3d_palette_set_entries(struct wined3d_palette *palette,
  96         DWORD flags, DWORD start, DWORD count, const PALETTEENTRY *entries)
  97 {
  98     struct wined3d_resource *resource;
  99
 100     TRACE("palette %p, flags %#x, start %u, count %u, entries %p.\n",
 101             palette, flags, start, count, entries);
 102     TRACE("Palette flags: %#x.\n", palette->flags);
 103
 104     if (palette->flags & WINEDDPCAPS_8BITENTRIES)
 105     {
 106         const BYTE *entry = (const BYTE *)entries;
 107         unsigned int i;
 108
 109         for (i = start; i < count + start; ++i)
 110             palette->palents[i].peRed = *entry++;
 111     }
 112     else
 113     {
 114         memcpy(palette->palents + start, entries, count * sizeof(*palette->palents));
 115
 116         /* When WINEDDCAPS_ALLOW256 isn't set we need to override entry 0 with black and 255 with white */
 117         if (!(palette->flags & WINEDDPCAPS_ALLOW256))
 118         {
 119             TRACE("WINEDDPCAPS_ALLOW256 set, overriding palette entry 0 with black and 255 with white\n");
 120             palette->palents[0].peRed = 0;
 121             palette->palents[0].peGreen = 0;
 122             palette->palents[0].peBlue = 0;
 123
 124             palette->palents[255].peRed = 255;
 125             palette->palents[255].peGreen = 255;
 126             palette->palents[255].peBlue = 255;
 127         }
 128
 129         if (palette->hpal)
 130             SetPaletteEntries(palette->hpal, start, count, palette->palents + start);
 131     }
 132
 133     /* If the palette is attached to the render target, update all render targets */
 134     LIST_FOR_EACH_ENTRY(resource, &palette->device->resources, struct wined3d_resource, resource_list_entry)
 135     {
 136         if (resource->type == WINED3D_RTYPE_SURFACE)
 137         {
 138             struct wined3d_surface *surface = surface_from_resource(resource);
 139             if (surface->palette == palette)
 140                 surface->surface_ops->surface_realize_palette(surface);
 141         }
 142     }
 143
 144     return WINED3D_OK;
 145 }
 146
 147 DWORD CDECL wined3d_palette_get_flags(const struct wined3d_palette *palette)
 148 {
 149     TRACE("palette %p.\n", palette);
 150
 151     return palette->flags;
 152 }
 153
 154 void * CDECL wined3d_palette_get_parent(const struct wined3d_palette *palette)
 155 {
 156     TRACE("palette %p.\n", palette);
 157
 158     return palette->parent;
 159 }
 160
 161 static HRESULT wined3d_palette_init(struct wined3d_palette *palette, struct wined3d_device *device,
 162         DWORD flags, const PALETTEENTRY *entries, void *parent)
 163 {
 164     HRESULT hr;
 165
 166     palette->ref = 1;
 167     palette->parent = parent;
 168     palette->device = device;
 169     palette->flags = flags;
 170
 171     palette->palNumEntries = wined3d_palette_size(flags);
 172     palette->hpal = CreatePalette((const LOGPALETTE *)&palette->palVersion);
 173     if (!palette->hpal)
 174     {
 175         WARN("Failed to create palette.\n");
 176         return E_FAIL;
 177     }
 178
 179     hr = wined3d_palette_set_entries(palette, 0, 0, wined3d_palette_size(flags), entries);
 180     if (FAILED(hr))
 181     {
 182         WARN("Failed to set palette entries, hr %#x.\n", hr);
 183         DeleteObject(palette->hpal);
 184         return hr;
 185     }
 186
 187     return WINED3D_OK;
 188 }
 189
 190 HRESULT CDECL wined3d_palette_create(struct wined3d_device *device, DWORD flags,
 191         const PALETTEENTRY *entries, void *parent, struct wined3d_palette **palette)
 192 {
 193     struct wined3d_palette *object;
 194     HRESULT hr;
 195
 196     TRACE("device %p, flags %#x, entries %p, palette %p, parent %p.\n",
 197             device, flags, entries, palette, parent);
 198
 199     object = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*object));
 200     if (!object)
 201     {
 202         ERR("Failed to allocate palette memory.\n");
 203         return E_OUTOFMEMORY;
 204     }
 205
 206     hr = wined3d_palette_init(object, device, flags, entries, parent);
 207     if (FAILED(hr))
 208     {
 209         WARN("Failed to initialize palette, hr %#x.\n", hr);
 210         HeapFree(GetProcessHeap(), 0, object);
 211         return hr;
 212     }
 213
 214     TRACE("Created palette %p.\n", object);
 215     *palette = object;
 216
 217     return WINED3D_OK;
 218 }