src/modules/engines/software_16_ddraw/evas_ddraw_main.cpp

   1 #include "evas_engine.h"
   2
   3
   4 void *
   5 evas_software_ddraw_lock(DDraw_Output_Buffer *ddob, int *ddraw_width, int *ddraw_height, int *ddraw_pitch, int *ddraw_depth)
   6 {
   7    DDSURFACEDESC surface_desc;
   8
   9    ZeroMemory(&surface_desc, sizeof(surface_desc));
  10    surface_desc.dwSize = sizeof(surface_desc);
  11
  12    if (FAILED(ddob->dd.surface_back->Lock(NULL,
  13                                           &surface_desc,
  14                                           DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR | DDLOCK_WRITEONLY,
  15                                           NULL)))
  16      return NULL;
  17
  18    *ddraw_width = surface_desc.dwWidth;
  19    *ddraw_height = surface_desc.dwHeight;
  20    *ddraw_pitch = surface_desc.lPitch;
  21    *ddraw_depth = surface_desc.ddpfPixelFormat.dwRGBBitCount >> 3;
  22
  23    return surface_desc.lpSurface;
  24 }
  25
  26 void
  27 evas_software_ddraw_unlock_and_flip(DDraw_Output_Buffer *ddob)
  28 {
  29    RECT    dst_rect;
  30    RECT    src_rect;
  31    POINT   p;
  32
  33    if (FAILED(ddob->dd.surface_back->Unlock(NULL)))
  34      return;
  35
  36    /* we figure out where on the primary surface our window lives */
  37    p.x = 0;
  38    p.y = 0;
  39    ClientToScreen(ddob->dd.window, &p);
  40    GetClientRect(ddob->dd.window, &dst_rect);
  41    OffsetRect(&dst_rect, p.x, p.y);
  42    SetRect(&src_rect, 0, 0, ddob->width, ddob->height);
  43
  44    /* nothing to do if the function fails, so we don't check the result */
  45    ddob->dd.surface_primary->BltFast(0, 0,
  46                                      ddob->dd.surface_back, &dst_rect,
  47                                      DDBLTFAST_WAIT || DDBLTFAST_NOCOLORKEY);
  48 }
  49
  50 void
  51 evas_software_ddraw_surface_resize(DDraw_Output_Buffer *ddob)
  52 {
  53    DDSURFACEDESC surface_desc;
  54
  55    ddob->dd.surface_back->Release();
  56    memset (&surface_desc, 0, sizeof (surface_desc));
  57    surface_desc.dwSize = sizeof (surface_desc);
  58    /* FIXME: that code does not compile. Must know why */
  59 #if 0
  60    surface_desc.dwFlags = DDSD_HEIGHT | DDSD_WIDTH;
  61    surface_desc.dwWidth = width;
  62    surface_desc.dwHeight = height;
  63    IDirectDrawSurface7_SetSurfaceDesc(ddob->dd.surface_back, &surface_desc, NULL);
  64 #else
  65    surface_desc.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
  66    surface_desc.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
  67    surface_desc.dwWidth = ddob->width;
  68    surface_desc.dwHeight = ddob->height;
  69    ddob->dd.object->CreateSurface(&surface_desc, &ddob->dd.surface_back, NULL);
  70 #endif
  71 }