/***************************************************************************\
Blits one surface to another.
\**************************************************************************/
int IMR_DirectXInterface::Blit(LPDIRECTDRAWSURFACE4 Source, LPDIRECTDRAWSURFACE4 Target)
{
RECT Dest;
HRESULT ddrval;
DDSURFACEDESC2 SourceDesc, TargetDesc;
int BltX, BltY;
// Make sure DirectDraw is active:
if (!Flags.DirectDrawActive)
{
IMR_SetErrorText("IMR_DirectXInterface::Blit(): Interface not initialized!");
return IMRERR_NOTREADY;
}
// Make sure we have surfaces:
if (!Source || !Target)
{
IMR_SetErrorText("IMR_DirectXInterface::Blit(): NULL surface(s) specified!");
return IMRERR_NODATA;
}
// Get a surface descriptor for the surfaces:
TargetDesc.dwSize = sizeof(TargetDesc);
Target->GetSurfaceDesc(&TargetDesc);
SourceDesc.dwSize = sizeof(SourceDesc);
Source->GetSurfaceDesc(&SourceDesc);
// Now find the blit coords:
BltX = (TargetDesc.dwWidth / 2) - (SourceDesc.dwWidth / 2);
BltY = (TargetDesc.dwHeight / 2) - (SourceDesc.dwHeight / 2);
// Blit the surface:
ddrval = Target->BltFast(BltX, BltY, Source, NULL, DDBLTFAST_NOCOLORKEY | DDBLTFAST_WAIT);
// If we lost the surface, return failure:
if (ddrval == DDERR_SURFACELOST)
{
Restore(Source);
Restore(Target);
IMR_SetErrorText("IMR_DirectXInterface::Blit(): Lost surface!");
return IMRERR_DIRECTX;
}
// Return ok:
return IMR_OK;
}
/***************************************************************************\
Prepares all surfaces for rendering.
\***************************************************************************/
void IMR_DirectXInterface::Prepare_Frame(LPDIRECTDRAWSURFACE4 Target)
{
D3DRECT ClearRect;
DDSURFACEDESC2 TargetDesc;
// Make sure we have a target surface and a viewport interface:
if (!Direct3DViewport || !Target)
return;
// Get target size info:
TargetDesc.dwSize = sizeof(TargetDesc);
Target->GetSurfaceDesc(&TargetDesc);
// Setup the area to clear:
ClearRect.x1 = 0;
ClearRect.y1 = 0;
ClearRect.x2 = TargetDesc.dwWidth;
ClearRect.y2 = TargetDesc.dwHeight;
// Clear the viewport:
Direct3DViewport->Clear2(1, &ClearRect, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0x00000000, (float)1.0, NULL);
}
/***************************************************************************\
Initializes Direct3D.
\***************************************************************************/
int IMR_DirectXInterface::InitDirect3D(LPDIRECTDRAWSURFACE4 Target)
{
int err;
D3DVIEWPORT2 PortInitData;
DDPIXELFORMAT ZBufferPixelFormat;
DDSURFACEDESC2 ZBufferDesc, TargetDesc;
D3DDEVICEDESC HALDesc, HELDesc;
int DeviceFound = FALSE, FormatFound = FALSE;
// Make sure DirectDraw is active:
if (!Flags.DirectDrawActive)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): DirectDraw not initialized!");
return IMRERR_NOTREADY;
}
// Make sure we have a target surface:
if (!Target)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): NULL target specified!");
return IMRERR_NODATA;
}
// Get target size info:
TargetDesc.dwSize = sizeof(TargetDesc);
Target->GetSurfaceDesc(&TargetDesc);
// Release all Direct3D interfaces:
if (Direct3DViewport)
{
Direct3DViewport->Release();
Direct3DViewport = NULL;
}
if (Direct3DDevice)
{
Direct3DDevice->Release();
Direct3DDevice = NULL;
}
if (Direct3D)
{
Direct3D->Release();
Direct3D = NULL;
}
Flags.Direct3DActive = 0;
// Now get a new Direct3D3 interface:
DirectDraw->QueryInterface(IID_IDirect3D3, (void **)&Direct3D);
if (err != DD_OK)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): 1 DXERR: %s", IMR_MsgFromDXErr(err));
return IMRERR_DIRECTX;
}
// Enumerate the devices and find one to use:
err = Direct3D->EnumDevices(DeviceCallback, &DeviceFound);
if (err != D3D_OK)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): 2 DXERR: %s", IMR_MsgFromDXErr(err));
return IMRERR_DIRECTX;
}
if (!DeviceFound)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): No usable rendering devices!");
return IMRERR_DIRECTX;
}
// Find a pixel format for our z-buffer and verify that it worked:
Direct3D->EnumZBufferFormats(Direct3DDeviceInfo.Guid, ZBufferCallback, (void *)&ZBufferPixelFormat);
if (ZBufferPixelFormat.dwSize != sizeof(DDPIXELFORMAT))
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): Couldn't find Z-Buffer pixel format!");
return IMRERR_DIRECTX;
}
// Create a Z-Buffer:
ZeroMemory((void *)&ZBufferDesc, sizeof(ZBufferDesc));
ZBufferDesc.dwSize = sizeof(ZBufferDesc);
ZBufferDesc.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT;
ZBufferDesc.ddsCaps.dwCaps = DDSCAPS_ZBUFFER;
ZBufferDesc.dwWidth = TargetDesc.dwWidth;
ZBufferDesc.dwHeight = TargetDesc.dwHeight;
memcpy(&ZBufferDesc.ddpfPixelFormat, &ZBufferPixelFormat, sizeof(DDPIXELFORMAT));
if (IsEqualIID(Direct3DDeviceInfo.Guid, IID_IDirect3DHALDevice))
ZBufferDesc.ddsCaps.dwCaps |= DDSCAPS_VIDEOMEMORY;
else
ZBufferDesc.ddsCaps.dwCaps |= DDSCAPS_SYSTEMMEMORY;
err = DirectDraw->CreateSurface(&ZBufferDesc, &DDZBuffer, NULL);
if (err != DD_OK)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): 3 DXERR: %s", IMR_MsgFromDXErr(err));
return IMRERR_DIRECTX;
}
// Now attach the Z-buffer to the target surface:
err = Target->AddAttachedSurface(DDZBuffer);
if (err != DD_OK)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): 4 DXERR: %s", IMR_MsgFromDXErr(err));
return IMRERR_DIRECTX;
}
// Now create the device:
err = Direct3D->CreateDevice(Direct3DDeviceInfo.Guid, Target, &Direct3DDevice, NULL);
if (err != D3D_OK)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): 5 DXERR: %s", IMR_MsgFromDXErr(err));
return IMRERR_DIRECTX;
}
// Setup the device:
Direct3DDevice->SetRenderState(D3DRENDERSTATE_ZENABLE, D3DZB_TRUE);
Direct3DDevice->SetRenderState(D3DRENDERSTATE_SHADEMODE, D3DSHADE_GOURAUD);
Direct3DDevice->SetRenderState(D3DRENDERSTATE_CULLMODE, D3DCULL_NONE);
Direct3DDevice->SetLightState(D3DLIGHTSTATE_MATERIAL, NULL);
// Make sure this device can handle our textures:
Direct3DDevice->EnumTextureFormats(TextureFormatCallback, (void *)&FormatFound);
if (!FormatFound)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): No acceptable texture formats found!");
return IMRERR_DIRECTX;
}
// Now create a viewport init structure:
ZeroMemory(&PortInitData, sizeof(D3DVIEWPORT2));
PortInitData.dwSize = sizeof(D3DVIEWPORT2);
PortInitData.dwX = 0;
PortInitData.dwY = 0;
PortInitData.dwWidth = TargetDesc.dwWidth;
PortInitData.dwHeight = TargetDesc.dwHeight;
PortInitData.dvClipX = 0;
PortInitData.dvClipY = 0;
PortInitData.dvClipWidth = TargetDesc.dwWidth;
PortInitData.dvClipHeight = TargetDesc.dwHeight;
PortInitData.dvMinZ = 0.0f;
PortInitData.dvMaxZ = 1.0f;
// Create the viewport:
err = Direct3D->CreateViewport(&Direct3DViewport, NULL);
if (err != D3D_OK)
{
IMR_SetErrorText("IMR_DirectXInterface::InitDirect3D(): 6 DXERR: %s", IMR_MsgFromDXErr(err));
return IMRERR_DIRECTX;
}
// Associate the viewport with the device:
Direct3DDevice->AddViewport(Direct3DViewport);
// Set the parameters for the new viewport:
Direct3DViewport->SetViewport2(&PortInitData);
// Set the current viewport for the device:
Direct3DDevice->SetCurrentViewport(Direct3DViewport);
// Flag that Direct3D is up and running:
Flags.Direct3DActive = 1;
// Whew! That's done, so return success:
return IMR_OK;
}
