dlls/ddraw/light.c

   1 /* Direct3D Light
   2  * Copyright (c) 1998 / 2002 Lionel ULMER
   3  * Copyright (c) 2006        Stefan DÖSINGER
   4  *
   5  * This file contains the implementation of Direct3DLight.
   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
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include "ddraw_private.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  28
  29 /*****************************************************************************
  30  * light_update
  31  *
  32  * Updates the Direct3DDevice7 lighting parameters
  33  *
  34  *****************************************************************************/
  35 static void light_update(struct d3d_light *light)
  36 {
  37     struct d3d_device *device;
  38
  39     TRACE("light %p.\n", light);
  40
  41     if (!light->active_viewport || !light->active_viewport->active_device) return;
  42     device = light->active_viewport->active_device;
  43
  44     IDirect3DDevice7_SetLight(&device->IDirect3DDevice7_iface, light->dwLightIndex, &light->light7);
  45 }
  46
  47 /*****************************************************************************
  48  * light_activate
  49  *
  50  * Uses the Direct3DDevice7::LightEnable method to active the light
  51  *
  52  *****************************************************************************/
  53 void light_activate(struct d3d_light *light)
  54 {
  55     struct d3d_device *device;
  56
  57     TRACE("light %p.\n", light);
  58
  59     if (!light->active_viewport || !light->active_viewport->active_device) return;
  60     device = light->active_viewport->active_device;
  61
  62     light_update(light);
  63     if (!(light->light.dwFlags & D3DLIGHT_ACTIVE))
  64     {
  65         IDirect3DDevice7_LightEnable(&device->IDirect3DDevice7_iface, light->dwLightIndex, TRUE);
  66         light->light.dwFlags |= D3DLIGHT_ACTIVE;
  67     }
  68 }
  69
  70 /*****************************************************************************
  71  *
  72  * light_deactivate
  73  *
  74  * Uses the Direct3DDevice7::LightEnable method to deactivate the light
  75  *
  76  *****************************************************************************/
  77 void light_deactivate(struct d3d_light *light)
  78 {
  79     struct d3d_device *device;
  80
  81     TRACE("light %p.\n", light);
  82
  83     if (!light->active_viewport || !light->active_viewport->active_device) return;
  84     device = light->active_viewport->active_device;
  85
  86     /* If was not active, activate it */
  87     if (light->light.dwFlags & D3DLIGHT_ACTIVE)
  88     {
  89         IDirect3DDevice7_LightEnable(&device->IDirect3DDevice7_iface, light->dwLightIndex, FALSE);
  90         light->light.dwFlags &= ~D3DLIGHT_ACTIVE;
  91     }
  92 }
  93
  94 static inline struct d3d_light *impl_from_IDirect3DLight(IDirect3DLight *iface)
  95 {
  96     return CONTAINING_RECORD(iface, struct d3d_light, IDirect3DLight_iface);
  97 }
  98
  99 /*****************************************************************************
 100  * IDirect3DLight::QueryInterface
 101  *
 102  * Queries the object for different interfaces. Unimplemented for this
 103  * object at the moment
 104  *
 105  * Params:
 106  *  riid: Interface id asked for
 107  *  obj: Address to return the resulting pointer at.
 108  *
 109  * Returns:
 110  *  E_NOINTERFACE, because it's a stub
 111  *****************************************************************************/
 112 static HRESULT WINAPI d3d_light_QueryInterface(IDirect3DLight *iface, REFIID riid, void **object)
 113 {
 114     FIXME("iface %p, riid %s, object %p stub!\n", iface, debugstr_guid(riid), object);
 115
 116     *object = NULL;
 117     return E_NOINTERFACE;
 118 }
 119
 120 static ULONG WINAPI d3d_light_AddRef(IDirect3DLight *iface)
 121 {
 122     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 123     ULONG ref = InterlockedIncrement(&light->ref);
 124
 125     TRACE("%p increasing refcount to %u.\n", light, ref);
 126
 127     return ref;
 128 }
 129
 130 static ULONG WINAPI d3d_light_Release(IDirect3DLight *iface)
 131 {
 132     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 133     ULONG ref = InterlockedDecrement(&light->ref);
 134
 135     TRACE("%p decreasing refcount to %u.\n", light, ref);
 136
 137     if (!ref)
 138     {
 139         HeapFree(GetProcessHeap(), 0, light);
 140         return 0;
 141     }
 142     return ref;
 143 }
 144
 145 /*****************************************************************************
 146  * IDirect3DLight Methods.
 147  *****************************************************************************/
 148
 149 /*****************************************************************************
 150  * IDirect3DLight::Initialize
 151  *
 152  * Initializes the interface. This implementation is a no-op, because
 153  * initialization takes place at creation time
 154  *
 155  * Params:
 156  *  Direct3D: Pointer to an IDirect3D interface.
 157  *
 158  * Returns:
 159  *  D3D_OK
 160  *
 161  *****************************************************************************/
 162 static HRESULT WINAPI d3d_light_Initialize(IDirect3DLight *iface, IDirect3D *d3d)
 163 {
 164     TRACE("iface %p, d3d %p.\n", iface, d3d);
 165
 166     return D3D_OK;
 167 }
 168
 169 static const float zero_value[] = {
 170     0.0, 0.0, 0.0, 0.0
 171 };
 172
 173 static HRESULT WINAPI d3d_light_SetLight(IDirect3DLight *iface, D3DLIGHT *data)
 174 {
 175     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 176     D3DLIGHT7 *light7 = &light->light7;
 177
 178     TRACE("iface %p, data %p.\n", iface, data);
 179
 180     if ((!data->dltType) || (data->dltType > D3DLIGHT_PARALLELPOINT))
 181          return DDERR_INVALIDPARAMS;
 182
 183     if (data->dltType == D3DLIGHT_PARALLELPOINT)
 184         FIXME("D3DLIGHT_PARALLELPOINT not implemented.\n");
 185
 186     /* Translate D3DLIGHT2 structure to D3DLIGHT7. */
 187     light7->dltType = data->dltType;
 188     light7->dcvDiffuse = data->dcvColor;
 189     if (data->dwSize >= sizeof(D3DLIGHT2) && (((D3DLIGHT2 *)data)->dwFlags & D3DLIGHT_NO_SPECULAR))
 190         light7->dcvSpecular = data->dcvColor;
 191     else
 192         light7->dcvSpecular = *(const D3DCOLORVALUE *)zero_value;
 193     light7->dcvAmbient = data->dcvColor;
 194     light7->dvPosition = data->dvPosition;
 195     light7->dvDirection = data->dvDirection;
 196     light7->dvRange = data->dvRange;
 197     light7->dvFalloff = data->dvFalloff;
 198     light7->dvAttenuation0 = data->dvAttenuation0;
 199     light7->dvAttenuation1 = data->dvAttenuation1;
 200     light7->dvAttenuation2 = data->dvAttenuation2;
 201     light7->dvTheta = data->dvTheta;
 202     light7->dvPhi = data->dvPhi;
 203
 204     wined3d_mutex_lock();
 205     memcpy(&light->light, data, data->dwSize);
 206     if (light->light.dwFlags & D3DLIGHT_ACTIVE)
 207         light_update(light);
 208     wined3d_mutex_unlock();
 209
 210     return D3D_OK;
 211 }
 212
 213 /*****************************************************************************
 214  * IDirect3DLight::GetLight
 215  *
 216  * Returns the parameters currently assigned to the IDirect3DLight object
 217  *
 218  * Params:
 219  *  Light: Pointer to an D3DLIGHT structure to store the parameters
 220  *
 221  * Returns:
 222  *  D3D_OK on success
 223  *  DDERR_INVALIDPARAMS if Light is NULL
 224  *****************************************************************************/
 225 static HRESULT WINAPI d3d_light_GetLight(IDirect3DLight *iface, D3DLIGHT *lpLight)
 226 {
 227     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 228
 229     TRACE("iface %p, light %p.\n", iface, lpLight);
 230
 231     wined3d_mutex_lock();
 232     memcpy(lpLight, &light->light, lpLight->dwSize);
 233     wined3d_mutex_unlock();
 234
 235     return DD_OK;
 236 }
 237
 238 static const struct IDirect3DLightVtbl d3d_light_vtbl =
 239 {
 240     /*** IUnknown Methods ***/
 241     d3d_light_QueryInterface,
 242     d3d_light_AddRef,
 243     d3d_light_Release,
 244     /*** IDirect3DLight Methods ***/
 245     d3d_light_Initialize,
 246     d3d_light_SetLight,
 247     d3d_light_GetLight
 248 };
 249
 250 void d3d_light_init(struct d3d_light *light, struct ddraw *ddraw)
 251 {
 252     light->IDirect3DLight_iface.lpVtbl = &d3d_light_vtbl;
 253     light->ref = 1;
 254     light->ddraw = ddraw;
 255 }
 256
 257 struct d3d_light *unsafe_impl_from_IDirect3DLight(IDirect3DLight *iface)
 258 {
 259     if (!iface)
 260         return NULL;
 261     assert(iface->lpVtbl == &d3d_light_vtbl);
 262
 263     return impl_from_IDirect3DLight(iface);
 264 }