13 #include <pango/pango.h>
14 #include <pango/pangoft2.h>
19 #define MAXTEXT (1 << 20)
22 #define CTRLKEY(x) ((x) - 96)
32 {"default", "<span size=\"xx-small\">"}
36 static PangoContext
*context
;
38 static int height
= 1;
39 static PangoFontMap
*fontmap
;
40 static FT_Bitmap
*bitmap
;
41 static char text
[MAXTEXT
];
42 static char *pos
= text
;
45 static FT_Bitmap
*create_bitmap(int width
, int height
)
47 FT_Bitmap
*bitmap
= g_slice_new(FT_Bitmap
);
48 bitmap
->width
= width
;
49 bitmap
->pitch
= (bitmap
->width
+ 3) & ~3;
50 bitmap
->rows
= height
;
51 bitmap
->buffer
= g_malloc(bitmap
->pitch
* bitmap
->rows
);
52 bitmap
->num_grays
= 256;
53 bitmap
->pixel_mode
= ft_pixel_mode_grays
;
54 memset(bitmap
->buffer
, 0, bitmap
->pitch
* bitmap
->rows
);
58 static void destroy_bitmap(FT_Bitmap
*bitmap
)
60 g_free(bitmap
->buffer
);
61 g_slice_free(FT_Bitmap
, bitmap
);
64 #define COLORMERGE(f, b, c) ((b) + (((f) - (b)) * (c) >> 8u))
66 static void view_write(int sr
)
70 int nr
= MIN(height
- sr
, fb_rows());
71 int nc
= MIN(width
, fb_cols());
72 for (r
= 0; r
< nr
; r
++) {
73 for (c
= 0; c
< nc
; c
++) {
74 int v
= bitmap
->buffer
[(sr
+ r
) * bitmap
->pitch
+ c
];
75 int r
= COLORMERGE(0xd5, 0x00, 255 - v
);
76 int g
= COLORMERGE(0xdd, 0x00, 255 - v
);
77 int b
= COLORMERGE(0xff, 0x00, 255 - v
);
78 buf
[c
] = fb_color(r
, g
, b
);
80 fb_set(r
, 0, buf
, width
);
84 static PangoLayout
*make_layout(PangoContext
*context
, char *text
, double size
)
86 static PangoFontDescription
*font_description
;
87 PangoLayout
*layout
= pango_layout_new(context
);
88 pango_layout_set_markup(layout
, text
, -1);
89 pango_layout_set_wrap(layout
, PANGO_WRAP_WORD_CHAR
);
90 pango_layout_set_width(layout
, fb_cols() << 10);
91 pango_layout_set_height(layout
, -1);
92 pango_layout_set_alignment(layout
, PANGO_ALIGN_RIGHT
);
93 pango_layout_set_font_description(layout
, font_description
);
94 pango_font_description_free(font_description
);
98 static void do_output(PangoContext
*context
, char *text
)
101 PangoRectangle logical_rect
;
102 pango_context_set_language(context
, pango_language_get_default());
103 pango_context_set_base_dir(context
, PANGO_DIRECTION_RTL
);
104 layout
= make_layout(context
, text
, -1);
105 pango_layout_get_pixel_extents(layout
, NULL
, &logical_rect
);
106 pango_ft2_render_layout(bitmap
, layout
, 0, 0);
107 width
= MAX(width
, MAX(logical_rect
.x
+ logical_rect
.width
,
108 PANGO_PIXELS(pango_layout_get_width(layout
))));
109 height
= MAX(logical_rect
.y
+ logical_rect
.height
,
110 PANGO_PIXELS(pango_layout_get_height(layout
)));
111 g_object_unref(layout
);
114 static int readkey(void)
117 if (read(STDIN_FILENO
, &b
, 1) <= 0)
122 void txtwin_append(struct txtwin
*tw
, char *s
, char *tag
)
126 for (i
= 0; i
< ntags
; i
++)
127 if (tag
&& !strcmp(tag
, tags
[i
].name
))
129 snprintf(pos
, MAXTEXT
- (pos
- text
),
130 "%s%s</span>", tags
[t
].desc
, s
);
131 pos
= strchr(pos
, '\0');
134 void txtwin_tag(struct txtwin
*tw
, char *name
, char *fg
, char *bg
, char *font
)
136 strcpy(tags
[ntags
].name
, name
);
137 snprintf(tags
[ntags
].desc
, sizeof(tags
[ntags
].desc
),
138 "<span font=\"%s\">", font
);
142 static int getcount(int def
)
144 int result
= count
? count
: def
;
149 void txtwin_loop(struct txtwin
*tw
)
151 int step
= fb_rows() / PAGESTEPS
;
154 struct termios oldtermios
, termios
;
155 tcgetattr(STDIN_FILENO
, &termios
);
156 oldtermios
= termios
;
158 tcsetattr(STDIN_FILENO
, TCSAFLUSH
, &termios
);
159 bitmap
= create_bitmap(width
, height
);
160 do_output(context
, text
);
161 destroy_bitmap(bitmap
);
162 bitmap
= create_bitmap(width
, height
);
163 do_output(context
, text
);
165 while ((c
= readkey()) != -1) {
171 tcsetattr(STDIN_FILENO
, 0, &oldtermios
);
175 count
= count
* 10 + c
- '0';
179 head
+= step
* getcount(1);
182 head
-= step
* getcount(1);
186 head
+= fb_rows() * getcount(1) - step
;
189 head
-= fb_rows() * getcount(1) - step
;
197 head
= height
- fb_rows();
201 head
= height
* getcount(0) / 100;
204 /* no need to redraw */
207 head
= MAX(0, MIN(head
, height
- fb_rows()));
212 void txtwin_gtk_init(int argc
, char **argv
)
214 char *clear
= "\x1b[2J\x1b[H";
215 char *msg
= "\t\t\t\t***FBPAN***\n";
216 char *hide
= "\x1b[?25l";
218 g_set_prgname("fbpan");
219 setlocale(LC_ALL
, "");
220 write(STDIN_FILENO
, clear
, strlen(clear
));
221 write(STDIN_FILENO
, msg
, strlen(msg
));
222 write(STDIN_FILENO
, hide
, strlen(hide
));
226 struct txtwin
*txtwin_alloc() {
227 fontmap
= pango_ft2_font_map_new();
228 pango_ft2_font_map_set_resolution(PANGO_FT2_FONT_MAP(fontmap
), DPI
, DPI
);
229 context
= pango_font_map_create_context(PANGO_FONT_MAP(fontmap
));
233 void txtwin_free(struct txtwin
*tw
)
235 char *show
= "\x1b[?25h";
237 destroy_bitmap(bitmap
);
238 g_object_unref(context
);
239 g_object_unref(fontmap
);
240 write(STDIN_FILENO
, show
, strlen(show
));