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comparison src/shape_text.c @ 279:86a5ae82ccf2 mbtext

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* Modify svg2code_ex to use differnt font size at two test items to illustrate the function of the new text parser * Generate seperate text segments if the x is defined in the tspan. With this settings, we may be able to implement the text alignment already. * Be warnned that the text element may not be generated at all. We may need to convert the text element into a group for this situation. Currently, we leave it as it is.
author wycc
date Sat, 31 Jan 2009 11:51:19 +0800
parents a90fd749af82
children c8b6ca46950b
comparison
equal deleted inserted replaced
278:a90fd749af82 279:86a5ae82ccf2
33 if(text->scaled_font) 33 if(text->scaled_font)
34 cairo_scaled_font_destroy(text->scaled_font); 34 cairo_scaled_font_destroy(text->scaled_font);
35 cairo_font_face_destroy(text->face); 35 cairo_font_face_destroy(text->face);
36 } 36 }
37 37
38 static void sh_text_P_generate_layout(sh_text_t *text,cairo_t *cr);
38 shape_t *rdman_shape_text_new(redraw_man_t *rdman, 39 shape_t *rdman_shape_text_new(redraw_man_t *rdman,
39 const char *txt, co_aix x, co_aix y, 40 const char *txt, co_aix x, co_aix y,
40 co_aix font_size, cairo_font_face_t *face,PangoAttrList *attrs) { 41 co_aix font_size, cairo_font_face_t *face,PangoAttrList *attrs) {
41 sh_text_t *text; 42 sh_text_t *text;
42 43
60 text->flags |= TXF_SCALE_DIRTY; 61 text->flags |= TXF_SCALE_DIRTY;
61 62
62 text->shape.free = sh_text_free; 63 text->shape.free = sh_text_free;
63 text->layout = NULL; 64 text->layout = NULL;
64 text->attrs = attrs; 65 text->attrs = attrs;
66 sh_text_P_generate_layout(text, rdman->cr);
65 67
66 rdman_shape_man(rdman, (shape_t *)text); 68 rdman_shape_man(rdman, (shape_t *)text);
67 69
68 return (shape_t *)text; 70 return (shape_t *)text;
69 } 71 }
75 buf = strdup(txt); 77 buf = strdup(txt);
76 if(text->data) free(text->data); 78 if(text->data) free(text->data);
77 text->data = buf; 79 text->data = buf;
78 } 80 }
79 81
80 static int get_extents(sh_text_t *text, cairo_text_extents_t *extents) { 82 static int get_extents(sh_text_t *text, PangoRectangle *extents) {
81 cairo_matrix_t fmatrix; 83 cairo_matrix_t fmatrix;
82 cairo_matrix_t ctm; 84 cairo_matrix_t ctm;
83 cairo_scaled_font_t *new_scaled; 85 cairo_scaled_font_t *new_scaled;
84 cairo_font_options_t *fopt; 86 cairo_font_options_t *fopt;
85 87
86 if((text->flags & TXF_SCALE_DIRTY) || 88 pango_layout_get_extents(text->layout, NULL, extents);
87 text->scaled_font == NULL) { 89 pango_extents_to_pixels(extents,NULL);
88 fopt = cairo_font_options_create();
89 if(fopt == NULL)
90 return ERR;
91 memset(&fmatrix, 0, sizeof(cairo_matrix_t));
92 fmatrix.xx = text->d_font_size;
93 fmatrix.yy = text->d_font_size;
94 memset(&ctm, 0, sizeof(cairo_matrix_t));
95 ctm.xx = 1;
96 ctm.yy = 1;
97 new_scaled = cairo_scaled_font_create(text->face,
98 &fmatrix,
99 &ctm,
100 fopt);
101 cairo_font_options_destroy(fopt);
102 if(new_scaled == NULL)
103 return ERR;
104
105 if(text->scaled_font)
106 cairo_scaled_font_destroy(text->scaled_font);
107 text->scaled_font = new_scaled;
108 text->flags &= ~TXF_SCALE_DIRTY;
109 }
110
111 cairo_scaled_font_text_extents(text->scaled_font,
112 text->data, extents);
113 return OK; 90 return OK;
114 } 91 }
115 92
116 void sh_text_transform(shape_t *shape) { 93 void sh_text_transform(shape_t *shape) {
117 sh_text_t *text; 94 sh_text_t *text;
118 co_aix x, y; 95 co_aix x, y;
119 co_aix shw; 96 co_aix shw;
120 cairo_text_extents_t extents; 97 PangoRectangle extents;
121 co_aix poses[2][2]; 98 co_aix poses[2][2];
122 int r; 99 int r;
123 100
124 text = (sh_text_t *)shape; 101 text = (sh_text_t *)shape;
125 102
127 104
128 x = text->x; 105 x = text->x;
129 y = text->y; 106 y = text->y;
130 coord_trans_pos(shape->coord, &x, &y); 107 coord_trans_pos(shape->coord, &x, &y);
131 r = get_extents(text, &extents); 108 r = get_extents(text, &extents);
109
110 printf("x=%f y=%f text=%s ascent=%d,descent=%d,width=%d height=%d\n", x,y,text->data,PANGO_ASCENT(extents), PANGO_DESCENT(extents), extents.width, extents.height);
132 ASSERT(r == OK); 111 ASSERT(r == OK);
133 112
134 text->d_x = x; 113 text->d_x = x;
135 text->d_y = y-text->font_size; 114 text->d_y = y-text->font_size;
136 shw = shape->stroke_width / 2; 115 shw = shape->stroke_width / 2;
137 /* FIXME: It is unreasonable that a font exceed it's bbox. 116 /* FIXME: It is unreasonable that a font exceed it's bbox.
138 * We add 5 pixels in get right bbox. But, it is unreasonable. 117 * We add 5 pixels in get right bbox. But, it is unreasonable.
139 */ 118 */
140 poses[0][0] = x + extents.x_bearing - 5 - shw; 119
141 poses[0][1] = y + extents.y_bearing - 5 - shw; 120 poses[0][0] = x + extents.x - 5 - shw;
121 poses[0][1] = y + extents.y - 5 - shw;
142 poses[1][0] = poses[0][0] + extents.width + 10 + shape->stroke_width; 122 poses[1][0] = poses[0][0] + extents.width + 10 + shape->stroke_width;
143 poses[1][1] = poses[0][1] + extents.height + 10 + shape->stroke_width; 123 poses[1][1] = poses[0][1] + extents.height + 10 + shape->stroke_width;
144 geo_from_positions(shape->geo, 2, poses); 124 geo_from_positions(shape->geo, 2, poses);
145 /*! \todo Support ratation for shape_text. */ 125 /*! \todo Support ratation for shape_text. */
146 } 126 }
156 } 136 }
157 text->layout = pango_cairo_create_layout(cr); 137 text->layout = pango_cairo_create_layout(cr);
158 desc = pango_font_description_from_string("Sans Bold"); 138 desc = pango_font_description_from_string("Sans Bold");
159 pango_layout_set_font_description (text->layout, desc); 139 pango_layout_set_font_description (text->layout, desc);
160 pango_cairo_update_layout(cr,text->layout); 140 pango_cairo_update_layout(cr,text->layout);
161 pango_layout_set_text(text->layout,text->data,-1); 141 pango_layout_set_text(text->layout,text->data,strlen(text->data));
162 pango_layout_set_attributes(text->layout, text->attrs); 142 pango_layout_set_attributes(text->layout, text->attrs);
163
164 } 143 }
165 static void draw_text(sh_text_t *text, cairo_t *cr) { 144 static void draw_text(sh_text_t *text, cairo_t *cr) {
166 if (text->layout==NULL) { 145 sh_text_P_generate_layout(text, cr);
167 sh_text_P_generate_layout(text,cr);
168 }
169 cairo_move_to(cr, text->d_x, text->d_y); 146 cairo_move_to(cr, text->d_x, text->d_y);
170 pango_cairo_show_layout(cr,text->layout); 147 pango_cairo_show_layout(cr,text->layout);
171 } 148 }
172 149
173 150