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#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <memdraw.h>
#include <geometry.h>
#include "libobj/obj.h"
#include "graphics.h"
#include "internal.h"
static void
framebufctl_draw(Framebufctl *ctl, Memimage *dst)
{
lock(&ctl->swplk);
memimagedraw(dst, dst->r, ctl->fb[ctl->idx]->cb, ZP, nil, ZP, SoverD);
unlock(&ctl->swplk);
}
static void
framebufctl_swap(Framebufctl *ctl)
{
lock(&ctl->swplk);
ctl->idx ^= 1;
unlock(&ctl->swplk);
}
static void
framebufctl_reset(Framebufctl *ctl)
{
Framebuf *fb;
/* address the back buffer—resetting the front buffer is VERBOTEN */
fb = ctl->fb[ctl->idx^1];
memsetd(fb->zbuf, Inf(-1), Dx(fb->r)*Dy(fb->r));
memfillcolor(fb->cb, DTransparent);
}
Framebuf *
mkfb(Rectangle r)
{
Framebuf *fb;
fb = emalloc(sizeof *fb);
memset(fb, 0, sizeof *fb);
fb->cb = eallocmemimage(r, RGBA32);
fb->zbuf = emalloc(Dx(r)*Dy(r)*sizeof(*fb->zbuf));
memsetd(fb->zbuf, Inf(-1), Dx(r)*Dy(r));
fb->r = r;
return fb;
}
void
rmfb(Framebuf *fb)
{
free(fb->zbuf);
freememimage(fb->cb);
free(fb);
}
Framebufctl *
mkfbctl(Rectangle r)
{
Framebufctl *fc;
fc = emalloc(sizeof *fc);
memset(fc, 0, sizeof *fc);
fc->fb[0] = mkfb(r);
fc->fb[1] = mkfb(r);
fc->draw = framebufctl_draw;
fc->swap = framebufctl_swap;
fc->reset = framebufctl_reset;
return fc;
}
void
rmfbctl(Framebufctl *fc)
{
rmfb(fc->fb[1]);
rmfb(fc->fb[0]);
free(fc);
}
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