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authorLibravatar Manuel Stoeckl <code@mstoeckl.com>2023-11-23 08:40:41 -0500
committerLibravatar Simon Ser <contact@emersion.fr>2023-11-23 20:42:04 +0100
commite633fe0b4081f249e9708f95da972138c86838ca (patch)
tree383c7ca2d555353875787b8825c64ef5eb581b9f /common
parentcommon: rename load_background_image to load_image (diff)
downloadsway-e633fe0b4081f249e9708f95da972138c86838ca.tar.gz
sway-e633fe0b4081f249e9708f95da972138c86838ca.tar.zst
sway-e633fe0b4081f249e9708f95da972138c86838ca.zip
common: move load_image to swaybar
swaynag, swaymsg, and sway do not use this function and are unlikely to in the future.
Diffstat (limited to 'common')
-rw-r--r--common/background-image.c136
-rw-r--r--common/meson.build2
2 files changed, 0 insertions, 138 deletions
diff --git a/common/background-image.c b/common/background-image.c
deleted file mode 100644
index 2df10dd2..00000000
--- a/common/background-image.c
+++ /dev/null
@@ -1,136 +0,0 @@
1#include <assert.h>
2#include "background-image.h"
3#include "config.h"
4#include "log.h"
5
6#if HAVE_GDK_PIXBUF
7#include <gdk-pixbuf/gdk-pixbuf.h>
8#endif
9
10#if HAVE_GDK_PIXBUF
11static cairo_surface_t* gdk_cairo_image_surface_create_from_pixbuf(
12 const GdkPixbuf *gdkbuf) {
13 int chan = gdk_pixbuf_get_n_channels(gdkbuf);
14 if (chan < 3) {
15 return NULL;
16 }
17
18 const guint8* gdkpix = gdk_pixbuf_read_pixels(gdkbuf);
19 if (!gdkpix) {
20 return NULL;
21 }
22 gint w = gdk_pixbuf_get_width(gdkbuf);
23 gint h = gdk_pixbuf_get_height(gdkbuf);
24 int stride = gdk_pixbuf_get_rowstride(gdkbuf);
25
26 cairo_format_t fmt = (chan == 3) ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32;
27 cairo_surface_t * cs = cairo_image_surface_create (fmt, w, h);
28 cairo_surface_flush (cs);
29 if ( !cs || cairo_surface_status(cs) != CAIRO_STATUS_SUCCESS) {
30 return NULL;
31 }
32
33 int cstride = cairo_image_surface_get_stride(cs);
34 unsigned char * cpix = cairo_image_surface_get_data(cs);
35
36 if (chan == 3) {
37 int i;
38 for (i = h; i; --i) {
39 const guint8 *gp = gdkpix;
40 unsigned char *cp = cpix;
41 const guint8* end = gp + 3*w;
42 while (gp < end) {
43#if G_BYTE_ORDER == G_LITTLE_ENDIAN
44 cp[0] = gp[2];
45 cp[1] = gp[1];
46 cp[2] = gp[0];
47#else
48 cp[1] = gp[0];
49 cp[2] = gp[1];
50 cp[3] = gp[2];
51#endif
52 gp += 3;
53 cp += 4;
54 }
55 gdkpix += stride;
56 cpix += cstride;
57 }
58 } else {
59 /* premul-color = alpha/255 * color/255 * 255 = (alpha*color)/255
60 * (z/255) = z/256 * 256/255 = z/256 (1 + 1/255)
61 * = z/256 + (z/256)/255 = (z + z/255)/256
62 * # recurse once
63 * = (z + (z + z/255)/256)/256
64 * = (z + z/256 + z/256/255) / 256
65 * # only use 16bit uint operations, loose some precision,
66 * # result is floored.
67 * -> (z + z>>8)>>8
68 * # add 0x80/255 = 0.5 to convert floor to round
69 * => (z+0x80 + (z+0x80)>>8 ) >> 8
70 * ------
71 * tested as equal to lround(z/255.0) for uint z in [0..0xfe02]
72 */
73#define PREMUL_ALPHA(x,a,b,z) \
74 G_STMT_START { z = a * b + 0x80; x = (z + (z >> 8)) >> 8; } \
75 G_STMT_END
76 int i;
77 for (i = h; i; --i) {
78 const guint8 *gp = gdkpix;
79 unsigned char *cp = cpix;
80 const guint8* end = gp + 4*w;
81 guint z1, z2, z3;
82 while (gp < end) {
83#if G_BYTE_ORDER == G_LITTLE_ENDIAN
84 PREMUL_ALPHA(cp[0], gp[2], gp[3], z1);
85 PREMUL_ALPHA(cp[1], gp[1], gp[3], z2);
86 PREMUL_ALPHA(cp[2], gp[0], gp[3], z3);
87 cp[3] = gp[3];
88#else
89 PREMUL_ALPHA(cp[1], gp[0], gp[3], z1);
90 PREMUL_ALPHA(cp[2], gp[1], gp[3], z2);
91 PREMUL_ALPHA(cp[3], gp[2], gp[3], z3);
92 cp[0] = gp[3];
93#endif
94 gp += 4;
95 cp += 4;
96 }
97 gdkpix += stride;
98 cpix += cstride;
99 }
100#undef PREMUL_ALPHA
101 }
102 cairo_surface_mark_dirty(cs);
103 return cs;
104}
105#endif // HAVE_GDK_PIXBUF
106
107cairo_surface_t *load_image(const char *path) {
108 cairo_surface_t *image;
109#if HAVE_GDK_PIXBUF
110 GError *err = NULL;
111 GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(path, &err);
112 if (!pixbuf) {
113 sway_log(SWAY_ERROR, "Failed to load background image (%s).",
114 err->message);
115 return NULL;
116 }
117 image = gdk_cairo_image_surface_create_from_pixbuf(pixbuf);
118 g_object_unref(pixbuf);
119#else
120 image = cairo_image_surface_create_from_png(path);
121#endif // HAVE_GDK_PIXBUF
122 if (!image) {
123 sway_log(SWAY_ERROR, "Failed to read background image.");
124 return NULL;
125 }
126 if (cairo_surface_status(image) != CAIRO_STATUS_SUCCESS) {
127 sway_log(SWAY_ERROR, "Failed to read background image: %s."
128#if !HAVE_GDK_PIXBUF
129 "\nSway was compiled without gdk_pixbuf support, so only"
130 "\nPNG images can be loaded. This is the likely cause."
131#endif // !HAVE_GDK_PIXBUF
132 , cairo_status_to_string(cairo_surface_status(image)));
133 return NULL;
134 }
135 return image;
136}
diff --git a/common/meson.build b/common/meson.build
index 3756075a..c0ce1f68 100644
--- a/common/meson.build
+++ b/common/meson.build
@@ -1,7 +1,6 @@
1lib_sway_common = static_library( 1lib_sway_common = static_library(
2 'sway-common', 2 'sway-common',
3 files( 3 files(
4 'background-image.c',
5 'cairo.c', 4 'cairo.c',
6 'gesture.c', 5 'gesture.c',
7 'ipc-client.c', 6 'ipc-client.c',
@@ -14,7 +13,6 @@ lib_sway_common = static_library(
14 ), 13 ),
15 dependencies: [ 14 dependencies: [
16 cairo, 15 cairo,
17 gdk_pixbuf,
18 pango, 16 pango,
19 pangocairo, 17 pangocairo,
20 wayland_client.partial_dependency(compile_args: true) 18 wayland_client.partial_dependency(compile_args: true)
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-05-03 09:58:19 +0000