dlls/ddraw/light.c

   1 /* Direct3D Light
   2  * Copyright (c) 1998 / 2002 Lionel ULMER
   3  * Copyright (c) 2006        Stefan DÖSINGER
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include "config.h"
  21 #include "wine/port.h"
  22
  23 #include "ddraw_private.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  26
  27 /*****************************************************************************
  28  * light_update
  29  *
  30  * Updates the Direct3DDevice7 lighting parameters
  31  *
  32  *****************************************************************************/
  33 static void light_update(struct d3d_light *light)
  34 {
  35     struct d3d_device *device;
  36
  37     TRACE("light %p.\n", light);
  38
  39     if (!light->active_viewport || !light->active_viewport->active_device) return;
  40     device = light->active_viewport->active_device;
  41
  42     IDirect3DDevice7_SetLight(&device->IDirect3DDevice7_iface, light->dwLightIndex, &light->light7);
  43 }
  44
  45 /*****************************************************************************
  46  * light_activate
  47  *
  48  * Uses the Direct3DDevice7::LightEnable method to active the light
  49  *
  50  *****************************************************************************/
  51 void light_activate(struct d3d_light *light)
  52 {
  53     struct d3d_device *device;
  54
  55     TRACE("light %p.\n", light);
  56
  57     if (!light->active_viewport || !light->active_viewport->active_device) return;
  58     device = light->active_viewport->active_device;
  59
  60     light_update(light);
  61     if (!(light->light.dwFlags & D3DLIGHT_ACTIVE))
  62     {
  63         IDirect3DDevice7_LightEnable(&device->IDirect3DDevice7_iface, light->dwLightIndex, TRUE);
  64         light->light.dwFlags |= D3DLIGHT_ACTIVE;
  65     }
  66 }
  67
  68 /*****************************************************************************
  69  *
  70  * light_deactivate
  71  *
  72  * Uses the Direct3DDevice7::LightEnable method to deactivate the light
  73  *
  74  *****************************************************************************/
  75 void light_deactivate(struct d3d_light *light)
  76 {
  77     struct d3d_device *device;
  78
  79     TRACE("light %p.\n", light);
  80
  81     if (!light->active_viewport || !light->active_viewport->active_device) return;
  82     device = light->active_viewport->active_device;
  83
  84     if (light->light.dwFlags & D3DLIGHT_ACTIVE)
  85     {
  86         IDirect3DDevice7_LightEnable(&device->IDirect3DDevice7_iface, light->dwLightIndex, FALSE);
  87         light->light.dwFlags &= ~D3DLIGHT_ACTIVE;
  88     }
  89 }
  90
  91 static inline struct d3d_light *impl_from_IDirect3DLight(IDirect3DLight *iface)
  92 {
  93     return CONTAINING_RECORD(iface, struct d3d_light, IDirect3DLight_iface);
  94 }
  95
  96 /*****************************************************************************
  97  * IDirect3DLight::QueryInterface
  98  *
  99  * Queries the object for different interfaces. Unimplemented for this
 100  * object at the moment
 101  *
 102  * Params:
 103  *  riid: Interface id asked for
 104  *  obj: Address to return the resulting pointer at.
 105  *
 106  * Returns:
 107  *  E_NOINTERFACE, because it's a stub
 108  *****************************************************************************/
 109 static HRESULT WINAPI d3d_light_QueryInterface(IDirect3DLight *iface, REFIID riid, void **object)
 110 {
 111     FIXME("iface %p, riid %s, object %p stub!\n", iface, debugstr_guid(riid), object);
 112
 113     *object = NULL;
 114     return E_NOINTERFACE;
 115 }
 116
 117 static ULONG WINAPI d3d_light_AddRef(IDirect3DLight *iface)
 118 {
 119     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 120     ULONG ref = InterlockedIncrement(&light->ref);
 121
 122     TRACE("%p increasing refcount to %u.\n", light, ref);
 123
 124     return ref;
 125 }
 126
 127 static ULONG WINAPI d3d_light_Release(IDirect3DLight *iface)
 128 {
 129     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 130     ULONG ref = InterlockedDecrement(&light->ref);
 131
 132     TRACE("%p decreasing refcount to %u.\n", light, ref);
 133
 134     if (!ref)
 135     {
 136         heap_free(light);
 137         return 0;
 138     }
 139     return ref;
 140 }
 141
 142 /*****************************************************************************
 143  * IDirect3DLight Methods.
 144  *****************************************************************************/
 145
 146 /*****************************************************************************
 147  * IDirect3DLight::Initialize
 148  *
 149  * Initializes the interface. This implementation is a no-op, because
 150  * initialization takes place at creation time
 151  *
 152  * Params:
 153  *  Direct3D: Pointer to an IDirect3D interface.
 154  *
 155  * Returns:
 156  *  D3D_OK
 157  *
 158  *****************************************************************************/
 159 static HRESULT WINAPI d3d_light_Initialize(IDirect3DLight *iface, IDirect3D *d3d)
 160 {
 161     TRACE("iface %p, d3d %p.\n", iface, d3d);
 162
 163     return D3D_OK;
 164 }
 165
 166 static HRESULT WINAPI d3d_light_SetLight(IDirect3DLight *iface, D3DLIGHT *data)
 167 {
 168     static const D3DCOLORVALUE zero_value = {{0.0f}, {0.0f}, {0.0f}, {0.0f}};
 169     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 170     DWORD flags = data->dwSize >= sizeof(D3DLIGHT2) ? ((D3DLIGHT2 *)data)->dwFlags : D3DLIGHT_ACTIVE;
 171     D3DLIGHT7 *light7 = &light->light7;
 172
 173     TRACE("iface %p, data %p.\n", iface, data);
 174
 175     if ((!data->dltType) || (data->dltType > D3DLIGHT_PARALLELPOINT))
 176          return DDERR_INVALIDPARAMS;
 177
 178     /* Translate D3DLIGHT2 structure to D3DLIGHT7. */
 179     light7->dltType = data->dltType;
 180     light7->dcvDiffuse = data->dcvColor;
 181     if (flags & D3DLIGHT_NO_SPECULAR)
 182         light7->dcvSpecular = zero_value;
 183     else
 184         light7->dcvSpecular = data->dcvColor;
 185     light7->dcvAmbient = data->dcvColor;
 186     light7->dvPosition = data->dvPosition;
 187     light7->dvDirection = data->dvDirection;
 188     light7->dvRange = data->dvRange;
 189     light7->dvFalloff = data->dvFalloff;
 190     light7->dvAttenuation0 = data->dvAttenuation0;
 191     light7->dvAttenuation1 = data->dvAttenuation1;
 192     light7->dvAttenuation2 = data->dvAttenuation2;
 193     light7->dvTheta = data->dvTheta;
 194     light7->dvPhi = data->dvPhi;
 195
 196     wined3d_mutex_lock();
 197     memcpy(&light->light, data, sizeof(*data));
 198     if (!(light->light.dwFlags & D3DLIGHT_ACTIVE) && flags & D3DLIGHT_ACTIVE)
 199         light_activate(light);
 200     else if (light->light.dwFlags & D3DLIGHT_ACTIVE && !(flags & D3DLIGHT_ACTIVE))
 201         light_deactivate(light);
 202     else if (flags & D3DLIGHT_ACTIVE)
 203         light_update(light);
 204     light->light.dwFlags = flags;
 205     wined3d_mutex_unlock();
 206
 207     return D3D_OK;
 208 }
 209
 210 /*****************************************************************************
 211  * IDirect3DLight::GetLight
 212  *
 213  * Returns the parameters currently assigned to the IDirect3DLight object
 214  *
 215  * Params:
 216  *  Light: Pointer to an D3DLIGHT structure to store the parameters
 217  *
 218  * Returns:
 219  *  D3D_OK on success
 220  *  DDERR_INVALIDPARAMS if Light is NULL
 221  *****************************************************************************/
 222 static HRESULT WINAPI d3d_light_GetLight(IDirect3DLight *iface, D3DLIGHT *lpLight)
 223 {
 224     struct d3d_light *light = impl_from_IDirect3DLight(iface);
 225
 226     TRACE("iface %p, light %p.\n", iface, lpLight);
 227
 228     wined3d_mutex_lock();
 229     memcpy(lpLight, &light->light, lpLight->dwSize);
 230     wined3d_mutex_unlock();
 231
 232     return DD_OK;
 233 }
 234
 235 static const struct IDirect3DLightVtbl d3d_light_vtbl =
 236 {
 237     /*** IUnknown Methods ***/
 238     d3d_light_QueryInterface,
 239     d3d_light_AddRef,
 240     d3d_light_Release,
 241     /*** IDirect3DLight Methods ***/
 242     d3d_light_Initialize,
 243     d3d_light_SetLight,
 244     d3d_light_GetLight
 245 };
 246
 247 void d3d_light_init(struct d3d_light *light, struct ddraw *ddraw)
 248 {
 249     light->IDirect3DLight_iface.lpVtbl = &d3d_light_vtbl;
 250     light->ref = 1;
 251     light->ddraw = ddraw;
 252 }
 253
 254 struct d3d_light *unsafe_impl_from_IDirect3DLight(IDirect3DLight *iface)
 255 {
 256     if (!iface)
 257         return NULL;
 258     assert(iface->lpVtbl == &d3d_light_vtbl);
 259
 260     return impl_from_IDirect3DLight(iface);
 261 }