Mercurial > MadButterfly
annotate src/shape_text.c @ 48:bdf711cbf0fb
Use absolute time to dispatch animation actions.
| author | Thinker K.F. Li <thinker@branda.to> |
|---|---|
| date | Sat, 09 Aug 2008 18:26:20 +0800 |
| parents | d82749f77108 |
| children | 1ca417f741f1 |
| rev | line source |
|---|---|
| 27 | 1 #include <stdio.h> |
| 2 #include <stdlib.h> | |
| 3 #include <string.h> | |
|
31
da770188a44d
resize font size for changige of coord.
Thinker K.F. Li <thinker@branda.to>
parents:
30
diff
changeset
|
4 #include <math.h> |
| 27 | 5 #include <cairo.h> |
| 6 #include "mb_types.h" | |
| 7 #include "shapes.h" | |
| 8 | |
| 9 #define OK 0 | |
| 10 #define ERR -1 | |
| 11 | |
| 12 typedef struct _sh_text { | |
| 13 shape_t shape; | |
| 14 char *data; | |
| 15 co_aix x, y; | |
| 16 co_aix d_x, d_y; /* device x and y */ | |
| 17 co_aix font_size; | |
|
31
da770188a44d
resize font size for changige of coord.
Thinker K.F. Li <thinker@branda.to>
parents:
30
diff
changeset
|
18 co_aix d_font_size; |
| 27 | 19 cairo_font_face_t *face; |
| 20 cairo_scaled_font_t *scaled_font; | |
| 21 int flags; | |
| 22 } sh_text_t; | |
| 23 | |
| 24 #define TXF_SCALE_DIRTY 0x1 | |
| 25 | |
| 26 shape_t *sh_text_new(const char *txt, co_aix x, co_aix y, | |
| 27 co_aix font_size, cairo_font_face_t *face) { | |
| 28 sh_text_t *text; | |
| 29 | |
| 30 text = (sh_text_t *)malloc(sizeof(sh_text_t)); | |
| 31 if(text == NULL) | |
| 32 return NULL; | |
| 33 | |
| 34 memset(text, 0, sizeof(sh_text_t)); | |
| 35 text->shape.sh_type = SHT_TEXT; | |
| 36 text->data = strdup(txt); | |
| 37 if(text->data == NULL) { | |
| 38 free(text); | |
| 39 return NULL; | |
| 40 } | |
| 41 text->x = x; | |
| 42 text->y = y; | |
| 43 text->font_size = font_size; | |
| 44 cairo_font_face_reference(face); | |
| 45 text->face = face; | |
| 46 text->flags |= TXF_SCALE_DIRTY; | |
| 47 | |
| 48 return (shape_t *)text; | |
| 49 } | |
| 50 | |
| 51 void sh_text_free(shape_t *shape) { | |
| 52 sh_text_t *text = (sh_text_t *)shape; | |
| 53 | |
| 54 if(text->scaled_font) | |
| 55 cairo_scaled_font_destroy(text->scaled_font); | |
| 56 cairo_font_face_destroy(text->face); | |
| 57 } | |
| 58 | |
| 59 static int get_extents(sh_text_t *text, cairo_text_extents_t *extents) { | |
| 60 cairo_matrix_t fmatrix; | |
| 61 cairo_matrix_t ctm; | |
| 62 cairo_scaled_font_t *new_scaled; | |
| 63 cairo_font_options_t *fopt; | |
| 64 | |
| 65 if((text->flags & TXF_SCALE_DIRTY) || | |
| 66 text->scaled_font == NULL) { | |
| 67 fopt = cairo_font_options_create(); | |
| 68 if(fopt == NULL) | |
| 69 return ERR; | |
| 70 memset(&fmatrix, 0, sizeof(cairo_matrix_t)); | |
|
31
da770188a44d
resize font size for changige of coord.
Thinker K.F. Li <thinker@branda.to>
parents:
30
diff
changeset
|
71 fmatrix.xx = text->d_font_size; |
|
da770188a44d
resize font size for changige of coord.
Thinker K.F. Li <thinker@branda.to>
parents:
30
diff
changeset
|
72 fmatrix.yy = text->d_font_size; |
| 27 | 73 memset(&ctm, 0, sizeof(cairo_matrix_t)); |
| 74 ctm.xx = 1; | |
| 75 ctm.yy = 1; | |
| 76 new_scaled = cairo_scaled_font_create(text->face, | |
| 77 &fmatrix, | |
| 78 &ctm, | |
| 79 fopt); | |
| 80 cairo_font_options_destroy(fopt); | |
| 81 if(new_scaled == NULL) | |
| 82 return ERR; | |
| 83 | |
| 84 if(text->scaled_font) | |
| 85 cairo_scaled_font_destroy(text->scaled_font); | |
| 86 text->scaled_font = new_scaled; | |
| 87 text->flags &= ~TXF_SCALE_DIRTY; | |
| 88 } | |
| 89 | |
| 90 cairo_scaled_font_text_extents(text->scaled_font, | |
| 91 text->data, extents); | |
| 92 return OK; | |
| 93 } | |
| 94 | |
| 95 void sh_text_transform(shape_t *shape) { | |
| 96 sh_text_t *text; | |
| 97 co_aix x, y; | |
| 98 co_aix shw; | |
| 99 cairo_text_extents_t extents; | |
| 100 co_aix poses[2][2]; | |
| 101 int r; | |
| 102 | |
| 103 text = (sh_text_t *)shape; | |
|
31
da770188a44d
resize font size for changige of coord.
Thinker K.F. Li <thinker@branda.to>
parents:
30
diff
changeset
|
104 |
|
da770188a44d
resize font size for changige of coord.
Thinker K.F. Li <thinker@branda.to>
parents:
30
diff
changeset
|
105 text->d_font_size = coord_trans_size(shape->coord, text->font_size); |
|
da770188a44d
resize font size for changige of coord.
Thinker K.F. Li <thinker@branda.to>
parents:
30
diff
changeset
|
106 |
| 27 | 107 x = text->x; |
| 108 y = text->y; | |
| 109 coord_trans_pos(shape->coord, &x, &y); | |
| 110 r = get_extents(text, &extents); | |
| 111 if(r != OK) | |
| 112 /* TODO: announce error. change return type? */ | |
| 113 return; | |
| 114 | |
| 115 text->d_x = x; | |
| 116 text->d_y = y; | |
| 117 shw = shape->stroke_width / 2; | |
| 118 /* FIXME: It is unreasonable that a font exceed it's bbox. | |
| 119 * We add 5 pixels in get right bbox. But, it is unreasonable. | |
| 120 */ | |
| 121 poses[0][0] = x + extents.x_bearing - 5 - shw; | |
| 122 poses[0][1] = y + extents.y_bearing - 5 - shw; | |
| 123 poses[1][0] = poses[0][0] + extents.width + 10 + shape->stroke_width; | |
| 124 poses[1][1] = poses[0][1] + extents.height + 10 + shape->stroke_width; | |
| 125 geo_from_positions(shape->geo, 2, poses); | |
| 126 } | |
| 127 | |
| 128 | |
| 129 static void draw_text(sh_text_t *text, cairo_t *cr) { | |
| 130 cairo_set_scaled_font(cr, text->scaled_font); | |
| 131 cairo_move_to(cr, text->d_x, text->d_y); | |
| 132 cairo_text_path(cr, text->data); | |
| 133 } | |
| 134 | |
| 135 | |
|
30
e06a4a667ce2
Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
27
diff
changeset
|
136 void sh_text_draw(shape_t *shape, cairo_t *cr) { |
|
e06a4a667ce2
Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
27
diff
changeset
|
137 draw_text((sh_text_t *)shape, cr); |
|
e06a4a667ce2
Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
27
diff
changeset
|
138 } |
|
e06a4a667ce2
Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
27
diff
changeset
|
139 |