mirror of
https://github.com/swaywm/sway.git
synced 2024-11-13 05:54:11 +01:00
278 lines
7.8 KiB
C
278 lines
7.8 KiB
C
#include "wayland-desktop-shell-client-protocol.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <wayland-client.h>
|
|
#include <time.h>
|
|
#include <string.h>
|
|
#include <gdk-pixbuf/gdk-pixbuf.h>
|
|
#include "client/window.h"
|
|
#include "client/registry.h"
|
|
#include "log.h"
|
|
#include "list.h"
|
|
|
|
list_t *surfaces;
|
|
|
|
struct registry *registry;
|
|
|
|
enum scaling_mode {
|
|
SCALING_MODE_STRETCH,
|
|
SCALING_MODE_FILL,
|
|
SCALING_MODE_FIT,
|
|
SCALING_MODE_CENTER,
|
|
SCALING_MODE_TILE,
|
|
};
|
|
|
|
|
|
#ifndef GDK_PIXBUF_CHECK_VERSION
|
|
#define GDK_PIXBUF_CHECK_VERSION(major,minor,micro) \
|
|
(GDK_PIXBUF_MAJOR > (major) || \
|
|
(GDK_PIXBUF_MAJOR == (major) && GDK_PIXBUF_MINOR > (minor)) || \
|
|
(GDK_PIXBUF_MAJOR == (major) && GDK_PIXBUF_MINOR == (minor) && \
|
|
GDK_PIXBUF_MICRO >= (micro)))
|
|
#endif
|
|
|
|
cairo_surface_t* __gdk_cairo_image_surface_create_from_pixbuf(const GdkPixbuf *gdkbuf)
|
|
{
|
|
|
|
int chan = gdk_pixbuf_get_n_channels(gdkbuf);
|
|
if (chan < 3) return NULL;
|
|
|
|
#if GDK_PIXBUF_CHECK_VERSION(2,32,0)
|
|
const guint8* gdkpix = gdk_pixbuf_read_pixels(gdkbuf);
|
|
#else
|
|
const guint8* gdkpix = gdk_pixbuf_get_pixels(gdkbuf);
|
|
#endif
|
|
if (!gdkpix) {
|
|
return NULL;
|
|
}
|
|
gint w = gdk_pixbuf_get_width(gdkbuf);
|
|
gint h = gdk_pixbuf_get_height(gdkbuf);
|
|
int stride = gdk_pixbuf_get_rowstride(gdkbuf);
|
|
|
|
cairo_format_t fmt = (chan == 3) ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32;
|
|
cairo_surface_t * cs = cairo_image_surface_create (fmt, w, h);
|
|
cairo_surface_flush (cs);
|
|
if ( !cs || cairo_surface_status(cs) != CAIRO_STATUS_SUCCESS) {
|
|
return NULL;
|
|
}
|
|
|
|
int cstride = cairo_image_surface_get_stride(cs);
|
|
unsigned char * cpix = cairo_image_surface_get_data(cs);
|
|
|
|
if (chan == 3) {
|
|
int i;
|
|
for (i = h; i; --i) {
|
|
const guint8 *gp = gdkpix;
|
|
unsigned char *cp = cpix;
|
|
const guint8* end = gp + 3*w;
|
|
while (gp < end) {
|
|
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
|
|
cp[0] = gp[2];
|
|
cp[1] = gp[1];
|
|
cp[2] = gp[0];
|
|
#else
|
|
cp[1] = gp[0];
|
|
cp[2] = gp[1];
|
|
cp[3] = gp[2];
|
|
#endif
|
|
gp += 3;
|
|
cp += 4;
|
|
}
|
|
gdkpix += stride;
|
|
cpix += cstride;
|
|
}
|
|
} else {
|
|
/* premul-color = alpha/255 * color/255 * 255 = (alpha*color)/255
|
|
* (z/255) = z/256 * 256/255 = z/256 (1 + 1/255)
|
|
* = z/256 + (z/256)/255 = (z + z/255)/256
|
|
* # recurse once
|
|
* = (z + (z + z/255)/256)/256
|
|
* = (z + z/256 + z/256/255) / 256
|
|
* # only use 16bit uint operations, loose some precision,
|
|
* # result is floored.
|
|
* -> (z + z>>8)>>8
|
|
* # add 0x80/255 = 0.5 to convert floor to round
|
|
* => (z+0x80 + (z+0x80)>>8 ) >> 8
|
|
* ------
|
|
* tested as equal to lround(z/255.0) for uint z in [0..0xfe02]
|
|
*/
|
|
#define PREMUL_ALPHA(x,a,b,z) G_STMT_START { z = a * b + 0x80; x = (z + (z >> 8)) >> 8; } G_STMT_END
|
|
int i;
|
|
for (i = h; i; --i) {
|
|
const guint8 *gp = gdkpix;
|
|
unsigned char *cp = cpix;
|
|
const guint8* end = gp + 4*w;
|
|
guint z1, z2, z3;
|
|
while (gp < end) {
|
|
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
|
|
PREMUL_ALPHA(cp[0], gp[2], gp[3], z1);
|
|
PREMUL_ALPHA(cp[1], gp[1], gp[3], z2);
|
|
PREMUL_ALPHA(cp[2], gp[0], gp[3], z3);
|
|
cp[3] = gp[3];
|
|
#else
|
|
PREMUL_ALPHA(cp[1], gp[0], gp[3], z1);
|
|
PREMUL_ALPHA(cp[2], gp[1], gp[3], z2);
|
|
PREMUL_ALPHA(cp[3], gp[2], gp[3], z3);
|
|
cp[0] = gp[3];
|
|
#endif
|
|
gp += 4;
|
|
cp += 4;
|
|
}
|
|
gdkpix += stride;
|
|
cpix += cstride;
|
|
}
|
|
#undef PREMUL_ALPHA
|
|
}
|
|
cairo_surface_mark_dirty(cs);
|
|
return cs;
|
|
}
|
|
|
|
void sway_terminate(void) {
|
|
int i;
|
|
for (i = 0; i < surfaces->length; ++i) {
|
|
struct window *window = surfaces->items[i];
|
|
window_teardown(window);
|
|
}
|
|
list_free(surfaces);
|
|
registry_teardown(registry);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
int main(int argc, const char **argv) {
|
|
init_log(L_INFO);
|
|
surfaces = create_list();
|
|
registry = registry_poll();
|
|
|
|
if (argc != 4) {
|
|
sway_abort("Do not run this program manually. See man 5 sway and look for output options.");
|
|
}
|
|
|
|
if (!registry->desktop_shell) {
|
|
sway_abort("swaybg requires the compositor to support the desktop-shell extension.");
|
|
}
|
|
|
|
int desired_output = atoi(argv[1]);
|
|
sway_log(L_INFO, "Using output %d of %d", desired_output, registry->outputs->length);
|
|
int i;
|
|
struct output_state *output = registry->outputs->items[desired_output];
|
|
struct window *window = window_setup(registry, output->width, output->height, false);
|
|
if (!window) {
|
|
sway_abort("Failed to create surfaces.");
|
|
}
|
|
desktop_shell_set_background(registry->desktop_shell, output->output, window->surface);
|
|
list_add(surfaces, window);
|
|
|
|
GError *err=NULL;
|
|
GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(argv[2],&err);
|
|
if (!pixbuf) {
|
|
sway_abort("Failed to load background image.");
|
|
}
|
|
cairo_surface_t *image = __gdk_cairo_image_surface_create_from_pixbuf(pixbuf);
|
|
g_object_unref(pixbuf);
|
|
if (!image) {
|
|
sway_abort("Failed to read background image.");
|
|
}
|
|
double width = cairo_image_surface_get_width(image);
|
|
double height = cairo_image_surface_get_height(image);
|
|
|
|
const char *scaling_mode_str = argv[3];
|
|
enum scaling_mode scaling_mode = SCALING_MODE_STRETCH;
|
|
if (strcmp(scaling_mode_str, "stretch") == 0) {
|
|
scaling_mode = SCALING_MODE_STRETCH;
|
|
} else if (strcmp(scaling_mode_str, "fill") == 0) {
|
|
scaling_mode = SCALING_MODE_FILL;
|
|
} else if (strcmp(scaling_mode_str, "fit") == 0) {
|
|
scaling_mode = SCALING_MODE_FIT;
|
|
} else if (strcmp(scaling_mode_str, "center") == 0) {
|
|
scaling_mode = SCALING_MODE_CENTER;
|
|
} else if (strcmp(scaling_mode_str, "tile") == 0) {
|
|
scaling_mode = SCALING_MODE_TILE;
|
|
} else {
|
|
sway_abort("Unsupported scaling mode: %s", scaling_mode_str);
|
|
}
|
|
|
|
for (i = 0; i < surfaces->length; ++i) {
|
|
struct window *window = surfaces->items[i];
|
|
if (window_prerender(window) && window->cairo) {
|
|
switch (scaling_mode) {
|
|
case SCALING_MODE_STRETCH:
|
|
cairo_scale(window->cairo,
|
|
(double) window->width / width,
|
|
(double) window->height / height);
|
|
cairo_set_source_surface(window->cairo, image, 0, 0);
|
|
break;
|
|
case SCALING_MODE_FILL:
|
|
{
|
|
double window_ratio = (double) window->width / window->height;
|
|
double bg_ratio = width / height;
|
|
|
|
if (window_ratio > bg_ratio) {
|
|
double scale = (double) window->width / width;
|
|
cairo_scale(window->cairo, scale, scale);
|
|
cairo_set_source_surface(window->cairo, image,
|
|
0,
|
|
(double) window->height/2 / scale - height/2);
|
|
} else {
|
|
double scale = (double) window->height / height;
|
|
cairo_scale(window->cairo, scale, scale);
|
|
cairo_set_source_surface(window->cairo, image,
|
|
(double) window->width/2 / scale - width/2,
|
|
0);
|
|
}
|
|
break;
|
|
}
|
|
case SCALING_MODE_FIT:
|
|
{
|
|
double window_ratio = (double) window->width / window->height;
|
|
double bg_ratio = width / height;
|
|
|
|
if (window_ratio > bg_ratio) {
|
|
double scale = (double) window->height / height;
|
|
cairo_scale(window->cairo, scale, scale);
|
|
cairo_set_source_surface(window->cairo, image,
|
|
(double) window->width/2 / scale - width/2,
|
|
0);
|
|
} else {
|
|
double scale = (double) window->width / width;
|
|
cairo_scale(window->cairo, scale, scale);
|
|
cairo_set_source_surface(window->cairo, image,
|
|
0,
|
|
(double) window->height/2 / scale - height/2);
|
|
}
|
|
break;
|
|
}
|
|
case SCALING_MODE_CENTER:
|
|
cairo_set_source_surface(window->cairo, image,
|
|
(double) window->width/2 - width/2,
|
|
(double) window->height/2 - height/2);
|
|
break;
|
|
case SCALING_MODE_TILE:
|
|
{
|
|
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image);
|
|
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
|
|
cairo_set_source(window->cairo, pattern);
|
|
break;
|
|
}
|
|
default:
|
|
sway_abort("Scaling mode '%s' not implemented yet!", scaling_mode_str);
|
|
}
|
|
|
|
cairo_paint(window->cairo);
|
|
|
|
window_render(window);
|
|
}
|
|
}
|
|
|
|
cairo_surface_destroy(image);
|
|
|
|
while (wl_display_dispatch(registry->display) != -1);
|
|
|
|
for (i = 0; i < surfaces->length; ++i) {
|
|
struct window *window = surfaces->items[i];
|
|
window_teardown(window);
|
|
}
|
|
list_free(surfaces);
|
|
registry_teardown(registry);
|
|
return 0;
|
|
}
|