#include <windows.h>

#include "vis.h"
#include "rappapi.h"

// Forward declaration
void sample_Effect(int stepno, RappaFrameInfo *rfip, VisData *pVD);

RappaPluginInfo	rpi =
{
	1,			// Version - currently 1
	64,			// Some number of steps
	2,			// Number of inputs
	1,			// End input, the second one
	sample_Effect,
	"Sample",		// The display name
	"Sample"		// The internal name
};


extern "C"
DLLEXPORT	RappaPluginInfo	*
QueryRappaPlugin(void)
{
	return &rpi;
}


void
sample_Effect(int stepno, RappaFrameInfo *rfip, VisData *pVD)
{
	int	switch_pos;
	int	y;

	// This is the scan line after which we will switch back
	// to the original vis

	switch_pos = rfip->height * stepno / rpi.nsteps;

	// First draw the top in the new vis
	for (y = 0; y < switch_pos; y++)
		memcpy(&(rfip->output[y * rfip->pitch]),
		       &(rfip->inputs[1][y * rfip->pitch]),
		       rfip->width * sizeof(unsigned long));

	// Now draw the rest in the old vis
	for (; y < rfip->height; y++)
		memcpy(&(rfip->output[y * rfip->pitch]),
		       &(rfip->inputs[0][y * rfip->pitch]),
		       rfip->width * sizeof(unsigned long));
}