modules/video_output/win32/wingdi.c

   1 /*****************************************************************************
   2  * wingdi.c : Win32 / WinCE GDI video output plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002-2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *          Samuel Hocevar <sam@zoy.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32 #include <assert.h>
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_vout_display.h>
  37
  38 #include <windows.h>
  39
  40 #include "common.h"
  41
  42 /*****************************************************************************
  43  * Module descriptor
  44  *****************************************************************************/
  45 static int  Open (vlc_object_t *);
  46 static void Close(vlc_object_t *);
  47
  48 vlc_module_begin ()
  49     set_category(CAT_VIDEO)
  50     set_subcategory(SUBCAT_VIDEO_VOUT)
  51     set_shortname("GDI")
  52     set_description(N_("Windows GDI video output"))
  53     set_capability("vout display", 110)
  54     set_callbacks(Open, Close)
  55 vlc_module_end ()
  56
  57
  58 /*****************************************************************************
  59  * Local prototypes
  60  *****************************************************************************/
  61 static picture_pool_t *Pool  (vout_display_t *, unsigned);
  62 static void           Display(vout_display_t *, picture_t *, subpicture_t *subpicture);
  63 static int            Control(vout_display_t *, int, va_list);
  64 static void           Manage (vout_display_t *);
  65
  66 static int            Init(vout_display_t *, video_format_t *, int, int);
  67 static void           Clean(vout_display_t *);
  68
  69 /* */
  70 static int Open(vlc_object_t *object)
  71 {
  72     vout_display_t *vd = (vout_display_t *)object;
  73     vout_display_sys_t *sys;
  74
  75     vd->sys = sys = calloc(1, sizeof(*sys));
  76     if (!sys)
  77         return VLC_ENOMEM;
  78
  79     if (CommonInit(vd))
  80         goto error;
  81
  82     /* */
  83     video_format_t fmt = vd->fmt;
  84     if (Init(vd, &fmt, fmt.i_width, fmt.i_height))
  85         goto error;
  86
  87     vout_display_info_t info = vd->info;
  88     info.is_slow              = false;
  89     info.has_double_click     = true;
  90     info.has_hide_mouse       = false;
  91     info.has_pictures_invalid = true;
  92
  93     /* */
  94     vd->fmt  = fmt;
  95     vd->info = info;
  96
  97     vd->pool    = Pool;
  98     vd->prepare = NULL;
  99     vd->display = Display;
 100     vd->manage  = Manage;
 101     vd->control = Control;
 102     return VLC_SUCCESS;
 103
 104 error:
 105     Close(VLC_OBJECT(vd));
 106     return VLC_EGENERIC;
 107 }
 108
 109 /* */
 110 static void Close(vlc_object_t *object)
 111 {
 112     vout_display_t *vd = (vout_display_t *)object;
 113
 114     Clean(vd);
 115
 116     CommonClean(vd);
 117
 118     free(vd->sys);
 119 }
 120
 121 /* */
 122 static picture_pool_t *Pool(vout_display_t *vd, unsigned count)
 123 {
 124     VLC_UNUSED(count);
 125     return vd->sys->pool;
 126 }
 127
 128 static void Display(vout_display_t *vd, picture_t *picture, subpicture_t *subpicture)
 129 {
 130     vout_display_sys_t *sys = vd->sys;
 131
 132 #define rect_src vd->sys->rect_src
 133 #define rect_src_clipped vd->sys->rect_src_clipped
 134 #define rect_dest vd->sys->rect_dest
 135 #define rect_dest_clipped vd->sys->rect_dest_clipped
 136     RECT rect_dst = rect_dest_clipped;
 137     HDC hdc = GetDC(sys->hvideownd);
 138
 139     OffsetRect(&rect_dst, -rect_dest.left, -rect_dest.top);
 140     SelectObject(sys->off_dc, sys->off_bitmap);
 141
 142     if (rect_dest_clipped.right - rect_dest_clipped.left !=
 143         rect_src_clipped.right - rect_src_clipped.left ||
 144         rect_dest_clipped.bottom - rect_dest_clipped.top !=
 145         rect_src_clipped.bottom - rect_src_clipped.top) {
 146         StretchBlt(hdc, rect_dst.left, rect_dst.top,
 147                    rect_dst.right, rect_dst.bottom,
 148                    sys->off_dc,
 149                    rect_src_clipped.left,  rect_src_clipped.top,
 150                    rect_src_clipped.right, rect_src_clipped.bottom,
 151                    SRCCOPY);
 152     } else {
 153         BitBlt(hdc, rect_dst.left, rect_dst.top,
 154                rect_dst.right, rect_dst.bottom,
 155                sys->off_dc,
 156                rect_src_clipped.left, rect_src_clipped.top,
 157                SRCCOPY);
 158     }
 159
 160     ReleaseDC(sys->hvideownd, hdc);
 161 #undef rect_src
 162 #undef rect_src_clipped
 163 #undef rect_dest
 164 #undef rect_dest_clipped
 165     /* TODO */
 166     picture_Release(picture);
 167     VLC_UNUSED(subpicture);
 168
 169     CommonDisplay(vd);
 170 }
 171
 172 static int Control(vout_display_t *vd, int query, va_list args)
 173 {
 174     switch (query) {
 175     case VOUT_DISPLAY_RESET_PICTURES:
 176         vlc_assert_unreachable();
 177         return VLC_EGENERIC;
 178     default:
 179         return CommonControl(vd, query, args);
 180     }
 181
 182 }
 183
 184 static void Manage(vout_display_t *vd)
 185 {
 186     CommonManage(vd);
 187 }
 188
 189 static int Init(vout_display_t *vd,
 190                 video_format_t *fmt, int width, int height)
 191 {
 192     vout_display_sys_t *sys = vd->sys;
 193
 194     /* */
 195     RECT *display = &sys->rect_display;
 196     display->left   = 0;
 197     display->top    = 0;
 198     display->right  = GetSystemMetrics(SM_CXSCREEN);;
 199     display->bottom = GetSystemMetrics(SM_CYSCREEN);;
 200
 201     /* Initialize an offscreen bitmap for direct buffer operations. */
 202
 203     /* */
 204     HDC window_dc = GetDC(sys->hvideownd);
 205
 206     /* */
 207     sys->i_depth = GetDeviceCaps(window_dc, PLANES) *
 208                    GetDeviceCaps(window_dc, BITSPIXEL);
 209
 210     /* */
 211     msg_Dbg(vd, "GDI depth is %i", sys->i_depth);
 212     switch (sys->i_depth) {
 213     case 8:
 214         fmt->i_chroma = VLC_CODEC_RGB8;
 215         break;
 216     case 15:
 217         fmt->i_chroma = VLC_CODEC_RGB15;
 218         fmt->i_rmask  = 0x7c00;
 219         fmt->i_gmask  = 0x03e0;
 220         fmt->i_bmask  = 0x001f;
 221         break;
 222     case 16:
 223         fmt->i_chroma = VLC_CODEC_RGB16;
 224         fmt->i_rmask  = 0xf800;
 225         fmt->i_gmask  = 0x07e0;
 226         fmt->i_bmask  = 0x001f;
 227         break;
 228     case 24:
 229         fmt->i_chroma = VLC_CODEC_RGB24;
 230         fmt->i_rmask  = 0x00ff0000;
 231         fmt->i_gmask  = 0x0000ff00;
 232         fmt->i_bmask  = 0x000000ff;
 233         break;
 234     case 32:
 235         fmt->i_chroma = VLC_CODEC_RGB32;
 236         fmt->i_rmask  = 0x00ff0000;
 237         fmt->i_gmask  = 0x0000ff00;
 238         fmt->i_bmask  = 0x000000ff;
 239         break;
 240     default:
 241         msg_Err(vd, "screen depth %i not supported", sys->i_depth);
 242         return VLC_EGENERIC;
 243     }
 244     fmt->i_width  = width;
 245     fmt->i_height = height;
 246
 247     void *p_pic_buffer;
 248     int     i_pic_pitch;
 249     /* Initialize offscreen bitmap */
 250     BITMAPINFO *bi = &sys->bitmapinfo;
 251     memset(bi, 0, sizeof(BITMAPINFO) + 3 * sizeof(RGBQUAD));
 252     if (sys->i_depth > 8) {
 253         ((DWORD*)bi->bmiColors)[0] = fmt->i_rmask;
 254         ((DWORD*)bi->bmiColors)[1] = fmt->i_gmask;
 255         ((DWORD*)bi->bmiColors)[2] = fmt->i_bmask;;
 256     }
 257
 258     BITMAPINFOHEADER *bih = &sys->bitmapinfo.bmiHeader;
 259     bih->biSize = sizeof(BITMAPINFOHEADER);
 260     bih->biSizeImage     = 0;
 261     bih->biPlanes        = 1;
 262     bih->biCompression   = (sys->i_depth == 15 ||
 263                             sys->i_depth == 16) ? BI_BITFIELDS : BI_RGB;
 264     bih->biBitCount      = sys->i_depth;
 265     bih->biWidth         = fmt->i_width;
 266     bih->biHeight        = -fmt->i_height;
 267     bih->biClrImportant  = 0;
 268     bih->biClrUsed       = 0;
 269     bih->biXPelsPerMeter = 0;
 270     bih->biYPelsPerMeter = 0;
 271
 272     i_pic_pitch = bih->biBitCount * bih->biWidth / 8;
 273     sys->off_bitmap = CreateDIBSection(window_dc,
 274                                        (BITMAPINFO *)bih,
 275                                        DIB_RGB_COLORS,
 276                                        &p_pic_buffer, NULL, 0);
 277
 278     sys->off_dc = CreateCompatibleDC(window_dc);
 279
 280     SelectObject(sys->off_dc, sys->off_bitmap);
 281     ReleaseDC(sys->hvideownd, window_dc);
 282
 283     EventThreadUpdateTitle(sys->event, VOUT_TITLE " (WinGDI output)");
 284
 285     /* */
 286     picture_resource_t rsc;
 287     memset(&rsc, 0, sizeof(rsc));
 288     rsc.p[0].p_pixels = p_pic_buffer;
 289     rsc.p[0].i_lines  = fmt->i_height;
 290     rsc.p[0].i_pitch  = i_pic_pitch;;
 291
 292     picture_t *picture = picture_NewFromResource(fmt, &rsc);
 293     if (picture != NULL)
 294         sys->pool = picture_pool_New(1, &picture);
 295     else
 296         sys->pool = NULL;
 297
 298     UpdateRects(vd, NULL, NULL, true);
 299
 300     return VLC_SUCCESS;
 301 }
 302
 303 static void Clean(vout_display_t *vd)
 304 {
 305     vout_display_sys_t *sys = vd->sys;
 306
 307     if (sys->pool)
 308         picture_pool_Release(sys->pool);
 309     sys->pool = NULL;
 310
 311     if (sys->off_dc)
 312         DeleteDC(sys->off_dc);
 313     if (sys->off_bitmap)
 314         DeleteObject(sys->off_bitmap);
 315 }