#Super hexagon gameplay driver
#Super hexagon gameplay code

CPU Processes, where each thread in a process isĭisplayed separately.

Solid orange means work associated with that Present still remains, while the cross-hash pattern means all rendering has completed and the hardware has already been programmed to begin reading from the surface at the next VBlank.

The Flip Queue shows what Present commands haveīeen queued and are pending execution (e.g.

Only the single command buffer at the front of the queue can be executed at any time.

T he GPU Hardware Queue shows what command buffers have been submitted to the GPU by the OS scheduler, and which, if any the GPU is executing at any given time.

In GPUView, there are three distinct areas of the interface: The outputted frame data is stored in a 'primary' surface, that is a surface eligible (in terms of memory layout/location) to be directly scanned out by the display hardware.

The command buffer sits in the GPU hardware queue (typically only two deep) until it reaches the front and is executed by the GPU.

The OS scheduler chooses to allocate execution time to the game (command buffers from apps such as the Desktop Windows Manager in Windows always have a higher priority).

The swap chain back buffer becomes available (is not being read by the display).

The command buffer has reached the front of the queue for that particular API device/process.

#Super hexagon gameplay driver

Once the following criteria are satisfied, the OS scheduler ensures all referenced resources are resident in GPU memory, patches the command buffer to replace any resource references with the actual physical addresses (only if needed, certain GPUs/drivers support virtual addressing) and instructs the kernel-mode driver (KMD) to submit the command buffer to the actual GPU hardware queue.The OS graphics scheduler stores the command buffer in a queue for that particular API device/process.

At the UMD's election (or in response to a Present/SwapBuffers/Flush command by the game), it instructs the OS graphics scheduler to execute the command buffer.

#Super hexagon gameplay code

The graphics user-mode driver (UMD) receives these calls (directly in OpenGL's case, or from the Direct3D runtime in Direct3D's case) and begins generating a command buffer containing the actual hardware-specific machine code that corresponds the game's rendering API calls.Game calls Direct3D/OpenGL rendering APIs.More explicitly, a high-level list of what occurs each frame is as follows: A game draws a new frame first by calling Direct3D/OpenGL rendering APIs, and displays it by calling IDXGISwapChain::Present (or SwapBuffers for OpenGL).