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Merge pull request #260 from christophgysin/scale

Browse source 
implement background scaling
This commit is contained in:
Drew DeVault 2015-11-25 18:58:23 -05:00
commit a713686daa
3 changed files with 92 additions and 6 deletions
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2
sway.5.txt
View file

@ -127,7 +127,7 @@ Commands
**output** <name> <background|bg> <file> <mode>::
Sets the wallpaper for the given output to the specified file, using the given
scaling mode (one of "stretch", "fill", "center", "tile").
scaling mode (one of "stretch", "fill", "fit", "center", "tile").
**output** <name> disable::
Disables the specified output.

1
sway/commands.c
View file

@ -85,6 +85,7 @@ static char *bg_options[] = {
"stretch",
"center",
"fill",
"fit",
"tile"
};

93
swaybg/main.c
View file

@ -12,6 +12,14 @@ list_t *surfaces;
struct registry *registry;
enum scaling_mode_t {
SCALING_MODE_STRETCH,
SCALING_MODE_FILL,
SCALING_MODE_FIT,
SCALING_MODE_CENTER,
SCALING_MODE_TILE,
};
void sway_terminate(void) {
int i;
for (i = 0; i < surfaces->length; ++i) {
@ -23,12 +31,12 @@ void sway_terminate(void) {
exit(1);
}
int main(int argc, char **argv) {
int main(int argc, const char **argv) {
init_log(L_INFO);
surfaces = create_list();
registry = registry_poll();
if (argc < 4) {
if (argc != 4) {
sway_abort("Do not run this program manually. See man 5 sway and look for output options.");
}
@ -49,16 +57,93 @@ int main(int argc, char **argv) {
desktop_shell_set_background(registry->desktop_shell, output->output, window->surface);
list_add(surfaces, window);
char *scaling_mode = argv[3];
cairo_surface_t *image = cairo_image_surface_create_from_png(argv[2]);
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_t scaling_mode;
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) {
cairo_scale(window->cairo, window->width / width, window->height / height);
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);