GPU Pro 4

258 IV Shadows

void ps_main ( PS_IN input)

{

// Allocate a new element in the list element buffer by

// atomically incrementing the buffer counter .

int counter = listElementBuffer.IncrementCounter();

// Store the required information and apply a depth bias.

listElementBuffer[counter ]. depth = input. posToShader.z + bias ;

listElementBuffer[counter ]. alpha = input. alpha;

//pixel screen coordinate to buffer index

int index = ( int)( input .pos.y * Width + input .pos.x );

int originalVal;

// Atomically exchange the element in the head buffer.

InterlockedExchange(headBuffer[index ], counter , originalVal);

// Create the link to the existing list.

listElementBuffer[ ...