shithub: libgraphics

ref: 10d114ef7415da437bd27fc6d637db257bb27634
dir: /raster.c/

#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <memdraw.h>
#include <geometry.h>
#include "graphics.h"
#include "internal.h"

Raster *
_allocraster(char *name, Rectangle rr, ulong chan)
{
	Raster *r;

	assert(chan <= FLOAT32);

	r = _emalloc(sizeof *r);
	memset(r, 0, sizeof *r);
	if(name != nil && (r->name = strdup(name)) == nil)
		sysfatal("strdup: %r");
	r->chan = chan;
	r->r = rr;
	r->data = _emalloc(Dx(rr)*Dy(rr)*sizeof(*r->data));
	return r;
}

void
_clearraster(Raster *r, ulong v)
{
	_memsetl(r->data, *(ulong*)&v, Dx(r->r)*Dy(r->r));
}

void
_fclearraster(Raster *r, float v)
{
	_memsetl(r->data, *(ulong*)&v, Dx(r->r)*Dy(r->r));
}

uchar *
_rasterbyteaddr(Raster *r, Point p)
{
	return (uchar*)&r->data[p.y*Dx(r->r) + p.x];
}

void
_rasterput(Raster *r, Point p, void *v)
{
	*(u32int*)_rasterbyteaddr(r, p) = *(u32int*)v;
}

void
_rasterget(Raster *r, Point p, void *v)
{
	*(u32int*)v = *(u32int*)_rasterbyteaddr(r, p);
}

void
_rasterputcolor(Raster *r, Point p, ulong c)
{
	_rasterput(r, p, &c);
}

ulong
_rastergetcolor(Raster *r, Point p)
{
	ulong c;

	_rasterget(r, p, &c);
	return c;
}

void
_rasterputfloat(Raster *r, Point p, float v)
{
	_rasterput(r, p, &v);
}

float
_rastergetfloat(Raster *r, Point p)
{
	float v;

	_rasterget(r, p, &v);
	return v;
}

void
_freeraster(Raster *r)
{
	if(r == nil)
		return;
	free(r->data);
	free(r->name);
	free(r);
}