D3dstartup d3d_new_ex

A blast from the past!

d3dstartup and d3d_new_ex are functions from the DirectX 8.x and 9.x APIs, which were used to create a Direct3D device and initialize the graphics hardware.

Here's a brief overview of what these functions do:

d3dstartup

d3dstartup is a function that initializes the Direct3D API and sets up the graphics device. It takes several parameters, including:

• hWnd: the handle to the window that will be used for rendering
• dwWindowed: a flag indicating whether the application is running in windowed or full-screen mode
• dwAdapter: the adapter to use (e.g., primary adapter, secondary adapter, etc.)
• dwDriverType: the type of driver to use (e.g., software, hardware, etc.)

The function returns a pointer to a LPDIRECT3D8 interface, which represents the Direct3D device.

d3d_new_ex

d3d_new_ex is a function that creates a new Direct3D device and returns a pointer to a LPDIRECT3DDEVICE8 interface. This interface represents the graphics device and provides methods for rendering, setting up graphics states, and more.

The function takes several parameters, including:

• lpD3D: a pointer to the LPDIRECT3D8 interface returned by d3dstartup
• dwDeviceType: the type of device to create (e.g., render device, vertex processing device, etc.)
• dwBehaviorFlags: flags that control the behavior of the device (e.g., whether to use a specific rendering mode, etc.)

The function returns a pointer to a LPDIRECT3DDEVICE8 interface, which represents the new device.

Here's an example of how you might use these functions:

#include <d3d8.h>

int main() {
    // Initialize Direct3D
    LPDIRECT3D8 lpD3D = NULL;
    d3dstartup(NULL, D3DCREATE_SOFTWARE_VERTEXPROCESSING, D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, &lpD3D);

    // Create a new device
    LPDIRECT3DDEVICE8 lpD3DDevice = NULL;
    lpD3D->CreateDevice(D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &lpD3DDevice);

    // Use the device to render something
    lpD3DDevice->BeginScene();
    //...
    lpD3DDevice->EndScene();

    // Clean up
    lpD3DDevice->Release();
    lpD3D->Release();

    return 0;
}

Note that these functions are part of the DirectX 8.x and 9.x APIs, which are no longer supported by Microsoft. If you're working on a new project, you should consider using a more modern graphics API, such as DirectX 11 or DirectX 12, or a cross-platform API like Vulkan or Metal.