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 "wine/port.h"
  23 #include "winerror.h"
  24 #include "wine/debug.h"
  25
  26 #include <string.h>
  27
  28 #include "wined3d_private.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  31
  32 ULONG CDECL wined3d_palette_incref(struct wined3d_palette *palette)
  33 {
  34     ULONG refcount = InterlockedIncrement(&palette->ref);
  35
  36     TRACE("%p increasing refcount to %u.\n", palette, refcount);
  37
  38     return refcount;
  39 }
  40
  41 ULONG CDECL wined3d_palette_decref(struct wined3d_palette *palette)
  42 {
  43     ULONG refcount = InterlockedDecrement(&palette->ref);
  44
  45     TRACE("%p decreasing refcount to %u.\n", palette, refcount);
  46
  47     if (!refcount)
  48         HeapFree(GetProcessHeap(), 0, palette);
  49
  50     return refcount;
  51 }
  52
  53 HRESULT CDECL wined3d_palette_get_entries(const struct wined3d_palette *palette,
  54         DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
  55 {
  56     unsigned int i;
  57     TRACE("palette %p, flags %#x, start %u, count %u, entries %p.\n",
  58             palette, flags, start, count, entries);
  59
  60     if (flags)
  61         return WINED3DERR_INVALIDCALL; /* unchecked */
  62     if (start > palette->size || count > palette->size - start)
  63         return WINED3DERR_INVALIDCALL;
  64
  65     if (palette->flags & WINED3D_PALETTE_8BIT_ENTRIES)
  66     {
  67         BYTE *entry = (BYTE *)entries;
  68
  69         for (i = start; i < count + start; ++i)
  70             *entry++ = palette->colors[i].rgbRed;
  71     }
  72     else
  73     {
  74         for (i = 0; i < count; ++i)
  75         {
  76             entries[i].peRed = palette->colors[i + start].rgbRed;
  77             entries[i].peGreen = palette->colors[i + start].rgbGreen;
  78             entries[i].peBlue = palette->colors[i + start].rgbBlue;
  79             entries[i].peFlags = palette->colors[i + start].rgbReserved;
  80         }
  81     }
  82
  83     return WINED3D_OK;
  84 }
  85
  86 void CDECL wined3d_palette_apply_to_dc(const struct wined3d_palette *palette, HDC dc)
  87 {
  88     if (SetDIBColorTable(dc, 0, 256, palette->colors) != 256)
  89         ERR("Failed to set DIB color table.\n");
  90 }
  91
  92 HRESULT CDECL wined3d_palette_set_entries(struct wined3d_palette *palette,
  93         DWORD flags, DWORD start, DWORD count, const PALETTEENTRY *entries)
  94 {
  95     unsigned int i;
  96
  97     TRACE("palette %p, flags %#x, start %u, count %u, entries %p.\n",
  98             palette, flags, start, count, entries);
  99     TRACE("Palette flags: %#x.\n", palette->flags);
 100
 101     if (palette->flags & WINED3D_PALETTE_8BIT_ENTRIES)
 102     {
 103         const BYTE *entry = (const BYTE *)entries;
 104
 105         for (i = start; i < count + start; ++i)
 106             palette->colors[i].rgbRed = *entry++;
 107     }
 108     else
 109     {
 110         for (i = 0; i < count; ++i)
 111         {
 112             palette->colors[i + start].rgbRed = entries[i].peRed;
 113             palette->colors[i + start].rgbGreen = entries[i].peGreen;
 114             palette->colors[i + start].rgbBlue = entries[i].peBlue;
 115             palette->colors[i + start].rgbReserved = entries[i].peFlags;
 116         }
 117
 118         /* When WINEDDCAPS_ALLOW256 isn't set we need to override entry 0 with black and 255 with white */
 119         if (!(palette->flags & WINED3D_PALETTE_ALLOW_256))
 120         {
 121             TRACE("WINED3D_PALETTE_ALLOW_256 not set, overriding palette entry 0 with black and 255 with white.\n");
 122             palette->colors[0].rgbRed = 0;
 123             palette->colors[0].rgbGreen = 0;
 124             palette->colors[0].rgbBlue = 0;
 125
 126             palette->colors[255].rgbRed = 255;
 127             palette->colors[255].rgbGreen = 255;
 128             palette->colors[255].rgbBlue = 255;
 129         }
 130     }
 131
 132     return WINED3D_OK;
 133 }
 134
 135 static HRESULT wined3d_palette_init(struct wined3d_palette *palette, struct wined3d_device *device,
 136         DWORD flags, unsigned int entry_count, const PALETTEENTRY *entries)
 137 {
 138     HRESULT hr;
 139
 140     palette->ref = 1;
 141     palette->device = device;
 142     palette->flags = flags;
 143     palette->size = entry_count;
 144
 145     if (FAILED(hr = wined3d_palette_set_entries(palette, 0, 0, entry_count, entries)))
 146     {
 147         WARN("Failed to set palette entries, hr %#x.\n", hr);
 148         return hr;
 149     }
 150
 151     return WINED3D_OK;
 152 }
 153
 154 HRESULT CDECL wined3d_palette_create(struct wined3d_device *device, DWORD flags,
 155         unsigned int entry_count, const PALETTEENTRY *entries, struct wined3d_palette **palette)
 156 {
 157     struct wined3d_palette *object;
 158     HRESULT hr;
 159
 160     TRACE("device %p, flags %#x, entries %p, palette %p.\n",
 161             device, flags, entries, palette);
 162
 163     object = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*object));
 164     if (!object)
 165         return E_OUTOFMEMORY;
 166
 167     if (FAILED(hr = wined3d_palette_init(object, device, flags, entry_count, entries)))
 168     {
 169         WARN("Failed to initialize palette, hr %#x.\n", hr);
 170         HeapFree(GetProcessHeap(), 0, object);
 171         return hr;
 172     }
 173
 174     TRACE("Created palette %p.\n", object);
 175     *palette = object;
 176
 177     return WINED3D_OK;
 178 }