void init_for_dimensions(unsigned width, unsigned height)
{
if(zsv)
zsv->Release();
ID3D11Texture2D* zsbuf;
D3D11_TEXTURE2D_DESC zsbufd;
memset(&zsbufd, 0, sizeof(zsbufd));
zsbufd.Width = width;
zsbufd.Height = height;
zsbufd.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
zsbufd.ArraySize = 1;
zsbufd.MipLevels = 1;
zsbufd.SampleDesc.Count = 1;
zsbufd.BindFlags = D3D11_BIND_DEPTH_STENCIL;
ensure(dev->CreateTexture2D(&zsbufd, 0, &zsbuf));
ensure(dev->CreateDepthStencilView(zsbuf, 0, &zsv));
zsbuf->Release();
ID3D11Texture2D* offscreen;
if(offscreen_rtv)
{
offscreen_rtv->Release();
offscreen_srv->Release();
offscreen_rtv = 0;
offscreen_srv = 0;
}
if(impressions > 1)
{
DXGI_FORMAT formats[] = {
DXGI_FORMAT_R32G32B32A32_FLOAT,
DXGI_FORMAT_R16G16B16A16_UNORM,
DXGI_FORMAT_R16G16B16A16_FLOAT,
DXGI_FORMAT_R10G10B10A2_UNORM,
};
DXGI_FORMAT format = DXGI_FORMAT_R8G8B8A8_UNORM; // this won't work well at all
unsigned needed_support = D3D11_FORMAT_SUPPORT_RENDER_TARGET | D3D11_FORMAT_SUPPORT_BLENDABLE | D3D11_FORMAT_SUPPORT_SHADER_SAMPLE;
for(unsigned i = 0; i < sizeof(formats); ++i)
{
unsigned support;
dev->CheckFormatSupport(DXGI_FORMAT_R32G32B32A32_FLOAT, &support);
if((support & needed_support) == needed_support)
{
format = formats[i];
break;
}
}
D3D11_TEXTURE2D_DESC offscreend;
memset(&offscreend, 0, sizeof(offscreend));
offscreend.Width = width;
offscreend.Height = height;
offscreend.Format = format;
offscreend.MipLevels = 1;
offscreend.ArraySize = 1;
offscreend.SampleDesc.Count = 1;
offscreend.BindFlags = D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET;
ensure(dev->CreateTexture2D(&offscreend, 0, &offscreen));
ensure(dev->CreateRenderTargetView(offscreen, 0, &offscreen_rtv));
ensure(dev->CreateShaderResourceView(offscreen, 0, &offscreen_srv));
offscreen->Release();
}
cur_width = width;
cur_height = height;
}
