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#include <cairo-xlib.h>
#include "demo.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
struct ximage_device {
struct device base;
struct framebuffer fb[2];
int q;
};
static void
destroy (struct framebuffer *abstract_framebuffer)
{
}
static void flush (struct ximage_device *device)
{
cairo_surface_flush (device->base.scanout);
XFlush (cairo_xlib_surface_get_display (device->base.scanout));
}
static void
show (struct framebuffer *fb)
{
struct ximage_device *device = (struct ximage_device *) fb->device;
cairo_t *cr;
cr = cairo_create (device->base.scanout);
cairo_set_source_surface (cr, fb->surface, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_destroy (cr);
flush (device);
}
static struct framebuffer *
get_fb (struct device *abstract_device)
{
struct ximage_device *device = (struct ximage_device *) abstract_device;
int q = ++device->q & 1;
return &device->fb[q];
}
static void
inplace_show (struct framebuffer *fb)
{
struct ximage_device *device = (struct ximage_device *) fb->device;
cairo_surface_unmap_image (device->base.scanout, fb->surface);
flush (device);
}
static struct framebuffer *
get_inplace_fb (struct device *abstract_device)
{
struct ximage_device *device = (struct ximage_device *) abstract_device;
device->fb[0].surface = cairo_surface_map_to_image (device->base.scanout, NULL);
return &device->fb[0];
}
struct device *
ximage_open (int argc, char **argv)
{
struct ximage_device *device;
Display *dpy;
Screen *scr;
Window win;
int screen;
XSetWindowAttributes attr;
enum split split;
int i, similar, map;
int x, y;
similar = 0;
map = 0;
for (i = 1; i < argc; i++) {
if (strcmp (argv[i], "--similar") == 0)
similar = cairo_version () >= CAIRO_VERSION_ENCODE (1, 12, 0);
else if (strcmp (argv[i], "--map") == 0)
map = cairo_version () >= CAIRO_VERSION_ENCODE (1, 12, 0);
}
dpy = XOpenDisplay (NULL);
if (dpy == NULL)
return NULL;
device = (struct ximage_device *) malloc (sizeof (struct ximage_device));
device->base.name = "ximage";
screen = DefaultScreen (dpy);
scr = XScreenOfDisplay (dpy, screen);
device->base.width = WidthOfScreen (scr);
device->base.height = HeightOfScreen (scr);
device_get_size (argc, argv, &device->base.width, &device->base.height);
x = y = 0;
switch ((split = device_get_split(argc, argv))) {
case SPLIT_NONE:
break;
case SPLIT_LEFT:
device->base.width /= 2;
break;
case SPLIT_RIGHT:
x = device->base.width /= 2;
break;
case SPLIT_TOP:
device->base.height /= 2;
break;
case SPLIT_BOTTOM:
y = device->base.height /= 2;
break;
case SPLIT_BOTTOM_LEFT:
device->base.width /= 2;
y = device->base.height /= 2;
break;
case SPLIT_BOTTOM_RIGHT:
x = device->base.width /= 2;
y = device->base.height /= 2;
break;
case SPLIT_TOP_LEFT:
device->base.width /= 2;
device->base.height /= 2;
break;
case SPLIT_TOP_RIGHT:
x = device->base.width /= 2;
device->base.height /= 2;
break;
case SPLIT_1_16...SPLIT_16_16:
split -= SPLIT_1_16;
x = split & 3;
y = (split >> 2) & 3;
device->base.width /= 4;
device->base.height /= 4;
x *= device->base.width;
y *= device->base.height;
break;
}
attr.override_redirect = True;
win = XCreateWindow (dpy, DefaultRootWindow (dpy),
x, y,
device->base.width, device->base.height, 0,
DefaultDepth (dpy, screen),
InputOutput,
DefaultVisual (dpy, screen),
CWOverrideRedirect, &attr);
XMapWindow (dpy, win);
XFlush (dpy);
device->base.scanout =
cairo_xlib_surface_create (dpy, win,
DefaultVisual (dpy, screen),
device->base.width, device->base.height);
if (map) {
device->fb[0].show = inplace_show;
device->base.get_framebuffer = get_inplace_fb;
} else {
if (similar) {
device->fb[0].surface =
cairo_surface_create_similar_image (device->base.scanout,
CAIRO_FORMAT_RGB24,
device->base.width, device->base.height);
device->fb[1].surface =
cairo_surface_create_similar_image (device->base.scanout,
CAIRO_FORMAT_RGB24,
device->base.width, device->base.height);
} else
device->fb[1].surface = device->fb[0].surface =
cairo_image_surface_create (CAIRO_FORMAT_RGB24,
device->base.width, device->base.height);
device->fb[1].show = device->fb[0].show = show;
device->base.get_framebuffer = get_fb;
}
device->fb[1].destroy = device->fb[0].destroy = destroy;
device->fb[1].device = device->fb[0].device = &device->base;
return &device->base;
}
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