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#include "evas_engine.h"
void *
evas_software_ddraw_lock(DDraw_Output_Buffer *ddob, int *ddraw_width, int *ddraw_height, int *ddraw_pitch, int *ddraw_depth)
{
DDSURFACEDESC surface_desc;
ZeroMemory(&surface_desc, sizeof(surface_desc));
surface_desc.dwSize = sizeof(surface_desc);
if (FAILED(ddob->dd.surface_back->Lock(NULL,
&surface_desc,
DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR | DDLOCK_WRITEONLY,
NULL)))
return NULL;
*ddraw_width = surface_desc.dwWidth;
*ddraw_height = surface_desc.dwHeight;
*ddraw_pitch = surface_desc.lPitch;
*ddraw_depth = surface_desc.ddpfPixelFormat.dwRGBBitCount >> 3;
return surface_desc.lpSurface;
}
void
evas_software_ddraw_unlock_and_flip(DDraw_Output_Buffer *ddob)
{
RECT dst_rect;
RECT src_rect;
POINT p;
if (FAILED(ddob->dd.surface_back->Unlock(NULL)))
return;
/* we figure out where on the primary surface our window lives */
p.x = 0;
p.y = 0;
ClientToScreen(ddob->dd.window, &p);
GetClientRect(ddob->dd.window, &dst_rect);
OffsetRect(&dst_rect, p.x, p.y);
SetRect(&src_rect, 0, 0, ddob->width, ddob->height);
/* nothing to do if the function fails, so we don't check the result */
ddob->dd.surface_primary->BltFast(0, 0,
ddob->dd.surface_back, &dst_rect,
DDBLTFAST_WAIT || DDBLTFAST_NOCOLORKEY);
}
void
evas_software_ddraw_surface_resize(DDraw_Output_Buffer *ddob)
{
DDSURFACEDESC surface_desc;
ddob->dd.surface_back->Release();
memset (&surface_desc, 0, sizeof (surface_desc));
surface_desc.dwSize = sizeof (surface_desc);
/* FIXME: that code does not compile. Must know why */
#if 0
surface_desc.dwFlags = DDSD_HEIGHT | DDSD_WIDTH;
surface_desc.dwWidth = width;
surface_desc.dwHeight = height;
IDirectDrawSurface7_SetSurfaceDesc(ddob->dd.surface_back, &surface_desc, NULL);
#else
surface_desc.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
surface_desc.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
surface_desc.dwWidth = ddob->width;
surface_desc.dwHeight = ddob->height;
ddob->dd.object->CreateSurface(&surface_desc, &ddob->dd.surface_back, NULL);
#endif
}
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