122 lines
3.7 KiB
C
122 lines
3.7 KiB
C
#include <assert.h>
|
|
#include <stdbool.h>
|
|
#include <wlr/util/log.h>
|
|
#include "background-image.h"
|
|
#include "cairo.h"
|
|
|
|
enum background_mode parse_background_mode(const char *mode) {
|
|
if (strcmp(mode, "stretch") == 0) {
|
|
return BACKGROUND_MODE_STRETCH;
|
|
} else if (strcmp(mode, "fill") == 0) {
|
|
return BACKGROUND_MODE_FILL;
|
|
} else if (strcmp(mode, "fit") == 0) {
|
|
return BACKGROUND_MODE_FIT;
|
|
} else if (strcmp(mode, "center") == 0) {
|
|
return BACKGROUND_MODE_CENTER;
|
|
} else if (strcmp(mode, "tile") == 0) {
|
|
return BACKGROUND_MODE_TILE;
|
|
} else if (strcmp(mode, "solid_color") == 0) {
|
|
return BACKGROUND_MODE_SOLID_COLOR;
|
|
}
|
|
wlr_log(WLR_ERROR, "Unsupported background mode: %s", mode);
|
|
return BACKGROUND_MODE_INVALID;
|
|
}
|
|
|
|
cairo_surface_t *load_background_image(const char *path) {
|
|
cairo_surface_t *image;
|
|
#if HAVE_GDK_PIXBUF
|
|
GError *err = NULL;
|
|
GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(path, &err);
|
|
if (!pixbuf) {
|
|
wlr_log(WLR_ERROR, "Failed to load background image (%s).",
|
|
err->message);
|
|
return false;
|
|
}
|
|
image = gdk_cairo_image_surface_create_from_pixbuf(pixbuf);
|
|
g_object_unref(pixbuf);
|
|
#else
|
|
image = cairo_image_surface_create_from_png(path);
|
|
#endif // HAVE_GDK_PIXBUF
|
|
if (!image) {
|
|
wlr_log(WLR_ERROR, "Failed to read background image.");
|
|
return NULL;
|
|
}
|
|
if (cairo_surface_status(image) != CAIRO_STATUS_SUCCESS) {
|
|
wlr_log(WLR_ERROR, "Failed to read background image: %s."
|
|
#if !HAVE_GDK_PIXBUF
|
|
"\nSway was compiled without gdk_pixbuf support, so only"
|
|
"\nPNG images can be loaded. This is the likely cause."
|
|
#endif // !HAVE_GDK_PIXBUF
|
|
, cairo_status_to_string(cairo_surface_status(image)));
|
|
return NULL;
|
|
}
|
|
return image;
|
|
}
|
|
|
|
void render_background_image(cairo_t *cairo, cairo_surface_t *image,
|
|
enum background_mode mode, int buffer_width, int buffer_height) {
|
|
double width = cairo_image_surface_get_width(image);
|
|
double height = cairo_image_surface_get_height(image);
|
|
|
|
cairo_save(cairo);
|
|
switch (mode) {
|
|
case BACKGROUND_MODE_STRETCH:
|
|
cairo_scale(cairo,
|
|
(double)buffer_width / width,
|
|
(double)buffer_height / height);
|
|
cairo_set_source_surface(cairo, image, 0, 0);
|
|
break;
|
|
case BACKGROUND_MODE_FILL: {
|
|
double window_ratio = (double)buffer_width / buffer_height;
|
|
double bg_ratio = width / height;
|
|
|
|
if (window_ratio > bg_ratio) {
|
|
double scale = (double)buffer_width / width;
|
|
cairo_scale(cairo, scale, scale);
|
|
cairo_set_source_surface(cairo, image,
|
|
0, (double)buffer_height / 2 / scale - height / 2);
|
|
} else {
|
|
double scale = (double)buffer_height / height;
|
|
cairo_scale(cairo, scale, scale);
|
|
cairo_set_source_surface(cairo, image,
|
|
(double)buffer_width / 2 / scale - width / 2, 0);
|
|
}
|
|
break;
|
|
}
|
|
case BACKGROUND_MODE_FIT: {
|
|
double window_ratio = (double)buffer_width / buffer_height;
|
|
double bg_ratio = width / height;
|
|
|
|
if (window_ratio > bg_ratio) {
|
|
double scale = (double)buffer_height / height;
|
|
cairo_scale(cairo, scale, scale);
|
|
cairo_set_source_surface(cairo, image,
|
|
(double)buffer_width / 2 / scale - width / 2, 0);
|
|
} else {
|
|
double scale = (double)buffer_width / width;
|
|
cairo_scale(cairo, scale, scale);
|
|
cairo_set_source_surface(cairo, image,
|
|
0, (double)buffer_height / 2 / scale - height / 2);
|
|
}
|
|
break;
|
|
}
|
|
case BACKGROUND_MODE_CENTER:
|
|
cairo_set_source_surface(cairo, image,
|
|
(double)buffer_width / 2 - width / 2,
|
|
(double)buffer_height / 2 - height / 2);
|
|
break;
|
|
case BACKGROUND_MODE_TILE: {
|
|
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image);
|
|
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
|
|
cairo_set_source(cairo, pattern);
|
|
break;
|
|
}
|
|
case BACKGROUND_MODE_SOLID_COLOR:
|
|
case BACKGROUND_MODE_INVALID:
|
|
assert(0);
|
|
break;
|
|
}
|
|
cairo_paint(cairo);
|
|
cairo_restore(cairo);
|
|
}
|