diff options
Diffstat (limited to 'swaybg')
| -rw-r--r-- | swaybg/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | swaybg/main.c | 119 |
2 files changed, 120 insertions, 1 deletions
diff --git a/swaybg/CMakeLists.txt b/swaybg/CMakeLists.txt index 71363d79..2588f9e7 100644 --- a/swaybg/CMakeLists.txt +++ b/swaybg/CMakeLists.txt @@ -2,6 +2,7 @@ include_directories( ${PROTOCOLS_INCLUDE_DIRS} ${WAYLAND_CLIENT_INCLUDE_DIR} ${CAIRO_INCLUDE_DIRS} + ${GDK_PIXBUF_INCLUDE_DIRS} ${PANGO_INCLUDE_DIRS} ) @@ -15,6 +16,7 @@ target_link_libraries(swaybg ${WAYLAND_CLIENT_LIBRARIES} ${WAYLAND_CURSOR_LIBRARIES} ${CAIRO_LIBRARIES} + ${GDK_PIXBUF_LIBRARIES} ${PANGO_LIBRARIES} m ) diff --git a/swaybg/main.c b/swaybg/main.c index b60c80e9..4a03f4a4 100644 --- a/swaybg/main.c +++ b/swaybg/main.c @@ -4,6 +4,7 @@ #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" @@ -21,6 +22,111 @@ enum scaling_mode { 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) { @@ -56,7 +162,16 @@ int main(int argc, const char **argv) { desktop_shell_set_background(registry->desktop_shell, output->output, window->surface); list_add(surfaces, window); - cairo_surface_t *image = cairo_image_surface_create_from_png(argv[2]); + 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); @@ -148,6 +263,8 @@ int main(int argc, const char **argv) { } } + cairo_surface_destroy(image); + while (wl_display_dispatch(registry->display) != -1); for (i = 0; i < surfaces->length; ++i) { |