1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
#include "cairoimage.h"
cCairoImage::cCairoImage(void) {
surface = NULL;
cr = NULL;
}
cCairoImage::~cCairoImage() {
if (cr)
cairo_destroy (cr);
if (surface)
cairo_surface_destroy (surface);
}
void cCairoImage::InitCairoImage(int width, int height) {
this->width = width;
this->height = height;
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
cr = cairo_create(surface);
cairo_set_antialias(cr, CAIRO_ANTIALIAS_BEST);
}
void cCairoImage::DrawTextVertical(string text, tColor color, string font, int size) {
int imgHeight = GetTextWidth(text, font, size);
InitCairoImage(size * 1.2, imgHeight);
SetColor(color);
cairo_move_to (cr, size, imgHeight);
cairo_font_weight_t fontWeight = CAIRO_FONT_WEIGHT_NORMAL;
cairo_font_slant_t fontSlant = CAIRO_FONT_SLANT_NORMAL;
cairo_select_font_face (cr, font.c_str(), fontSlant, fontWeight);
cairo_set_font_size (cr, size);
cairo_rotate(cr, 3*M_PI/2);
cairo_show_text (cr, text.c_str());
}
cImage *cCairoImage::GetImage(void) {
if (!cr || !surface)
return NULL;
unsigned char *data = cairo_image_surface_get_data(surface);
cImage *image = new cImage(cSize(width, height), (tColor*)data);
return image;
}
/**********************************************************************************
* Private Functions
**********************************************************************************/
int cCairoImage::GetTextWidth(string text, string font, int size) {
cairo_surface_t *tmpSurface;
cairo_t *tmpCr;
double width = 300;
double height = (double)size *1.3;
cairo_font_weight_t fontWeight = CAIRO_FONT_WEIGHT_NORMAL;
cairo_font_slant_t fontSlant = CAIRO_FONT_SLANT_NORMAL;
tmpSurface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
tmpCr = cairo_create (tmpSurface);
cairo_select_font_face (tmpCr, font.c_str(), fontSlant, fontWeight);
cairo_set_font_size (tmpCr, size);
cairo_text_extents_t te;
cairo_text_extents (tmpCr, text.c_str(), &te);
int textWidth = te.width;
cairo_destroy (tmpCr);
cairo_surface_destroy (tmpSurface);
return (double)textWidth * 1.1;
}
void cCairoImage::SetColor(tColor color) {
if (!cr || !surface)
return;
tIndex tAlpha = (color & 0xFF000000) >> 24;
tIndex tRed = (color & 0x00FF0000) >> 16;
tIndex tGreen = (color & 0x0000FF00) >> 8;
tIndex tBlue = (color & 0x000000FF);
double a = (int)tAlpha / (double)255;
double r = (int)tRed / (double)255;
double g = (int)tGreen / (double)255;
double b = (int)tBlue / (double)255;
cairo_set_source_rgba(cr, r, g, b, a);
}
|
