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-rw-r--r--wayland/cairo.c134
1 files changed, 0 insertions, 134 deletions
diff --git a/wayland/cairo.c b/wayland/cairo.c
deleted file mode 100644
index 193205b1..00000000
--- a/wayland/cairo.c
+++ /dev/null
@@ -1,134 +0,0 @@
1#include "client/cairo.h"
2
3void cairo_set_source_u32(cairo_t *cairo, uint32_t color) {
4 cairo_set_source_rgba(cairo,
5 (color >> (3*8) & 0xFF) / 255.0,
6 (color >> (2*8) & 0xFF) / 255.0,
7 (color >> (1*8) & 0xFF) / 255.0,
8 (color >> (0*8) & 0xFF) / 255.0);
9}
10
11cairo_surface_t *cairo_image_surface_scale(cairo_surface_t *image, int width, int height) {
12 int image_width = cairo_image_surface_get_width(image);
13 int image_height = cairo_image_surface_get_height(image);
14
15 cairo_surface_t *new =
16 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
17
18 cairo_t *cairo = cairo_create(new);
19
20 cairo_scale(cairo, (double) width / image_width, (double) height / image_height);
21
22 cairo_set_source_surface(cairo, image, 0, 0);
23 cairo_paint(cairo);
24
25 cairo_destroy(cairo);
26
27 return new;
28}
29
30#ifdef WITH_GDK_PIXBUF
31#include <gdk-pixbuf/gdk-pixbuf.h>
32
33#ifndef GDK_PIXBUF_CHECK_VERSION
34#define GDK_PIXBUF_CHECK_VERSION(major,minor,micro) \
35 (GDK_PIXBUF_MAJOR > (major) || \
36 (GDK_PIXBUF_MAJOR == (major) && GDK_PIXBUF_MINOR > (minor)) || \
37 (GDK_PIXBUF_MAJOR == (major) && GDK_PIXBUF_MINOR == (minor) && \
38 GDK_PIXBUF_MICRO >= (micro)))
39#endif
40
41cairo_surface_t* gdk_cairo_image_surface_create_from_pixbuf(const GdkPixbuf *gdkbuf) {
42 int chan = gdk_pixbuf_get_n_channels(gdkbuf);
43 if (chan < 3) return NULL;
44
45#if GDK_PIXBUF_CHECK_VERSION(2,32,0)
46 const guint8* gdkpix = gdk_pixbuf_read_pixels(gdkbuf);
47#else
48 const guint8* gdkpix = gdk_pixbuf_get_pixels(gdkbuf);
49#endif
50 if (!gdkpix) {
51 return NULL;
52 }
53 gint w = gdk_pixbuf_get_width(gdkbuf);
54 gint h = gdk_pixbuf_get_height(gdkbuf);
55 int stride = gdk_pixbuf_get_rowstride(gdkbuf);
56
57 cairo_format_t fmt = (chan == 3) ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32;
58 cairo_surface_t * cs = cairo_image_surface_create (fmt, w, h);
59 cairo_surface_flush (cs);
60 if ( !cs || cairo_surface_status(cs) != CAIRO_STATUS_SUCCESS) {
61 return NULL;
62 }
63
64 int cstride = cairo_image_surface_get_stride(cs);
65 unsigned char * cpix = cairo_image_surface_get_data(cs);
66
67 if (chan == 3) {
68 int i;
69 for (i = h; i; --i) {
70 const guint8 *gp = gdkpix;
71 unsigned char *cp = cpix;
72 const guint8* end = gp + 3*w;
73 while (gp < end) {
74#if G_BYTE_ORDER == G_LITTLE_ENDIAN
75 cp[0] = gp[2];
76 cp[1] = gp[1];
77 cp[2] = gp[0];
78#else
79 cp[1] = gp[0];
80 cp[2] = gp[1];
81 cp[3] = gp[2];
82#endif
83 gp += 3;
84 cp += 4;
85 }
86 gdkpix += stride;
87 cpix += cstride;
88 }
89 } else {
90 /* premul-color = alpha/255 * color/255 * 255 = (alpha*color)/255
91 * (z/255) = z/256 * 256/255 = z/256 (1 + 1/255)
92 * = z/256 + (z/256)/255 = (z + z/255)/256
93 * # recurse once
94 * = (z + (z + z/255)/256)/256
95 * = (z + z/256 + z/256/255) / 256
96 * # only use 16bit uint operations, loose some precision,
97 * # result is floored.
98 * -> (z + z>>8)>>8
99 * # add 0x80/255 = 0.5 to convert floor to round
100 * => (z+0x80 + (z+0x80)>>8 ) >> 8
101 * ------
102 * tested as equal to lround(z/255.0) for uint z in [0..0xfe02]
103 */
104#define PREMUL_ALPHA(x,a,b,z) G_STMT_START { z = a * b + 0x80; x = (z + (z >> 8)) >> 8; } G_STMT_END
105 int i;
106 for (i = h; i; --i) {
107 const guint8 *gp = gdkpix;
108 unsigned char *cp = cpix;
109 const guint8* end = gp + 4*w;
110 guint z1, z2, z3;
111 while (gp < end) {
112#if G_BYTE_ORDER == G_LITTLE_ENDIAN
113 PREMUL_ALPHA(cp[0], gp[2], gp[3], z1);
114 PREMUL_ALPHA(cp[1], gp[1], gp[3], z2);
115 PREMUL_ALPHA(cp[2], gp[0], gp[3], z3);
116 cp[3] = gp[3];
117#else
118 PREMUL_ALPHA(cp[1], gp[0], gp[3], z1);
119 PREMUL_ALPHA(cp[2], gp[1], gp[3], z2);
120 PREMUL_ALPHA(cp[3], gp[2], gp[3], z3);
121 cp[0] = gp[3];
122#endif
123 gp += 4;
124 cp += 4;
125 }
126 gdkpix += stride;
127 cpix += cstride;
128 }
129#undef PREMUL_ALPHA
130 }
131 cairo_surface_mark_dirty(cs);
132 return cs;
133}
134#endif //WITH_GDK_PIXBUF