Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Appearance settings

Commit e7d4ef0

Browse filesBrowse files
tordextordex
committed
Move text backend from container_linux to cairo_pango
1 parent e5ca809 commit e7d4ef0
Copy full SHA for e7d4ef0

File tree

Expand file treeCollapse file tree

4 files changed

+234
-228
lines changed
Filter options
Expand file treeCollapse file tree

4 files changed

+234
-228
lines changed

‎containers/linux/cairo_pango.cpp

Copy file name to clipboard
+180Lines changed: 180 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,180 @@
1+
#include "cairo_pango.h"
2+
3+
cairo_pango::cairo_pango()
4+
{
5+
m_temp_surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 2, 2);
6+
m_temp_cr = cairo_create(m_temp_surface);
7+
}
8+
9+
cairo_pango::~cairo_pango()
10+
{
11+
clear_images();
12+
cairo_surface_destroy(m_temp_surface);
13+
cairo_destroy(m_temp_cr);
14+
}
15+
16+
litehtml::uint_ptr cairo_pango::create_font(const char *faceName, int size, int weight, litehtml::font_style italic,
17+
unsigned int decoration, litehtml::font_metrics *fm)
18+
{
19+
PangoFontDescription *desc = pango_font_description_from_string (faceName);
20+
pango_font_description_set_absolute_size(desc, size * PANGO_SCALE);
21+
if(italic == litehtml::font_style_italic)
22+
{
23+
pango_font_description_set_style(desc, PANGO_STYLE_ITALIC);
24+
} else
25+
{
26+
pango_font_description_set_style(desc, PANGO_STYLE_NORMAL);
27+
}
28+
PangoWeight fnt_weight;
29+
if(weight >= 0 && weight < 150) fnt_weight = PANGO_WEIGHT_THIN;
30+
else if(weight >= 150 && weight < 250) fnt_weight = PANGO_WEIGHT_ULTRALIGHT;
31+
else if(weight >= 250 && weight < 350) fnt_weight = PANGO_WEIGHT_LIGHT;
32+
else if(weight >= 350 && weight < 450) fnt_weight = PANGO_WEIGHT_NORMAL;
33+
else if(weight >= 450 && weight < 550) fnt_weight = PANGO_WEIGHT_MEDIUM;
34+
else if(weight >= 550 && weight < 650) fnt_weight = PANGO_WEIGHT_SEMIBOLD;
35+
else if(weight >= 650 && weight < 750) fnt_weight = PANGO_WEIGHT_BOLD;
36+
else if(weight >= 750 && weight < 850) fnt_weight = PANGO_WEIGHT_ULTRABOLD;
37+
else fnt_weight = PANGO_WEIGHT_HEAVY;
38+
39+
pango_font_description_set_weight(desc, fnt_weight);
40+
41+
cairo_font* ret = nullptr;
42+
43+
if(fm)
44+
{
45+
cairo_save(m_temp_cr);
46+
PangoLayout *layout = pango_cairo_create_layout(m_temp_cr);
47+
PangoContext *context = pango_layout_get_context(layout);
48+
PangoLanguage *language = pango_language_get_default();
49+
pango_layout_set_font_description(layout, desc);
50+
PangoFontMetrics *metrics = pango_context_get_metrics(context, desc, language);
51+
52+
fm->ascent = PANGO_PIXELS((double)pango_font_metrics_get_ascent(metrics));
53+
fm->descent = PANGO_PIXELS((double)pango_font_metrics_get_descent(metrics));
54+
fm->height = fm->ascent + fm->descent;
55+
fm->x_height = fm->height;
56+
57+
pango_layout_set_text(layout, "x", 1);
58+
59+
int x_width, x_height;
60+
pango_layout_get_pixel_size(layout, &x_width, &x_height);
61+
62+
fm->x_height = x_height;
63+
64+
cairo_restore(m_temp_cr);
65+
66+
g_object_unref(layout);
67+
pango_font_metrics_unref(metrics);
68+
69+
ret = new cairo_font;
70+
ret->font = desc;
71+
ret->size = size;
72+
ret->strikeout = (decoration & litehtml::font_decoration_linethrough) != 0;
73+
ret->underline = (decoration & litehtml::font_decoration_underline) != 0;
74+
ret->ascent = fm->ascent;
75+
ret->descent = fm->descent;
76+
77+
ret->underline_thickness = pango_font_metrics_get_underline_thickness(metrics);
78+
ret->underline_position = -pango_font_metrics_get_underline_position(metrics);
79+
pango_quantize_line_geometry(&ret->underline_thickness, &ret->underline_position);
80+
ret->underline_thickness = PANGO_PIXELS(ret->underline_thickness);
81+
ret->underline_position = -1;//PANGO_PIXELS(ret->underline_position);
82+
83+
ret->strikethrough_thickness = pango_font_metrics_get_strikethrough_thickness(metrics);
84+
ret->strikethrough_position = pango_font_metrics_get_strikethrough_position(metrics);
85+
pango_quantize_line_geometry(&ret->strikethrough_thickness, &ret->strikethrough_position);
86+
ret->strikethrough_thickness = PANGO_PIXELS(ret->strikethrough_thickness);
87+
ret->strikethrough_position = PANGO_PIXELS(ret->strikethrough_position);
88+
}
89+
90+
return (litehtml::uint_ptr) ret;
91+
}
92+
93+
void cairo_pango::delete_font(litehtml::uint_ptr hFont)
94+
{
95+
auto* fnt = (cairo_font*) hFont;
96+
if(fnt)
97+
{
98+
pango_font_description_free(fnt->font);
99+
delete fnt;
100+
}
101+
}
102+
103+
int cairo_pango::text_width(const char *text, litehtml::uint_ptr hFont)
104+
{
105+
auto* fnt = (cairo_font*) hFont;
106+
107+
cairo_save(m_temp_cr);
108+
109+
PangoLayout *layout = pango_cairo_create_layout(m_temp_cr);
110+
pango_layout_set_font_description(layout, fnt->font);
111+
112+
pango_layout_set_text(layout, text, -1);
113+
pango_cairo_update_layout (m_temp_cr, layout);
114+
115+
int x_width, x_height;
116+
pango_layout_get_pixel_size(layout, &x_width, &x_height);
117+
118+
cairo_restore(m_temp_cr);
119+
120+
g_object_unref(layout);
121+
122+
return (int) x_width;
123+
}
124+
125+
void cairo_pango::draw_text(litehtml::uint_ptr hdc, const char *text, litehtml::uint_ptr hFont,
126+
litehtml::web_color color, const litehtml::position &pos)
127+
{
128+
auto* fnt = (cairo_font*) hFont;
129+
auto* cr = (cairo_t*) hdc;
130+
cairo_save(cr);
131+
132+
apply_clip(cr);
133+
134+
set_color(cr, color);
135+
136+
PangoLayout *layout = pango_cairo_create_layout(cr);
137+
pango_layout_set_font_description (layout, fnt->font);
138+
pango_layout_set_text (layout, text, -1);
139+
140+
int baseline = PANGO_PIXELS(pango_layout_get_baseline(layout));
141+
142+
PangoRectangle ink_rect, logical_rect;
143+
pango_layout_get_pixel_extents(layout, &ink_rect, &logical_rect);
144+
145+
int text_baseline = pos.height - fnt->descent;
146+
147+
int x = pos.left() + logical_rect.x;
148+
int y = pos.top() + logical_rect.y + text_baseline - baseline;
149+
150+
cairo_move_to(cr, x, y);
151+
pango_cairo_update_layout (cr, layout);
152+
pango_cairo_show_layout (cr, layout);
153+
154+
int tw = 0;
155+
156+
if(fnt->underline || fnt->strikeout)
157+
{
158+
tw = text_width(text, hFont);
159+
}
160+
161+
if(fnt->underline)
162+
{
163+
cairo_set_line_width(cr, fnt->underline_thickness);
164+
cairo_move_to(cr, x, pos.top() + text_baseline - fnt->underline_position + 0.5);
165+
cairo_line_to(cr, x + tw, pos.top() + text_baseline - fnt->underline_position + 0.5);
166+
cairo_stroke(cr);
167+
}
168+
if(fnt->strikeout)
169+
{
170+
cairo_set_line_width(cr, fnt->strikethrough_thickness);
171+
cairo_move_to(cr, x, pos.top() + text_baseline - fnt->strikethrough_position - 0.5);
172+
cairo_line_to(cr, x + tw, pos.top() + text_baseline - fnt->strikethrough_position - 0.5);
173+
cairo_stroke(cr);
174+
}
175+
176+
cairo_restore(cr);
177+
178+
g_object_unref(layout);
179+
}
180+

‎containers/linux/cairo_pango.h

Copy file name to clipboard
+37Lines changed: 37 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,37 @@
1+
#ifndef LITEBROWSER_CAIRO_PANGO_H
2+
#define LITEBROWSER_CAIRO_PANGO_H
3+
4+
#include <litehtml.h>
5+
#include "container_linux.h"
6+
#include <cairo.h>
7+
#include <pango/pangocairo.h>
8+
#include <pango/pango-font.h>
9+
10+
struct cairo_font
11+
{
12+
PangoFontDescription* font;
13+
int size;
14+
bool underline;
15+
bool strikeout;
16+
int ascent;
17+
int descent;
18+
int underline_thickness;
19+
int underline_position;
20+
int strikethrough_thickness;
21+
int strikethrough_position;
22+
};
23+
24+
class cairo_pango : public container_linux
25+
{
26+
cairo_surface_t* m_temp_surface;
27+
cairo_t* m_temp_cr;
28+
public:
29+
cairo_pango();
30+
~cairo_pango() override;
31+
litehtml::uint_ptr create_font(const char* faceName, int size, int weight, litehtml::font_style italic, unsigned int decoration, litehtml::font_metrics* fm) override;
32+
void delete_font(litehtml::uint_ptr hFont) override;
33+
int text_width(const char* text, litehtml::uint_ptr hFont) override;
34+
void draw_text(litehtml::uint_ptr hdc, const char* text, litehtml::uint_ptr hFont, litehtml::web_color color, const litehtml::position& pos) override;
35+
};
36+
37+
#endif //LITEBROWSER_CAIRO_PANGO_H

0 commit comments

Comments
0 (0)
Morty Proxy This is a proxified and sanitized view of the page, visit original site.