libswfdec/swfdec_text.c

   1 /* Swfdec
   2  * Copyright (C) 2003-2006 David Schleef <ds@schleef.org>
   3  *               2005-2006 Eric Anholt <eric@anholt.net>
   4  *                    2006 Benjamin Otte <otte@gnome.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA  02110-1301  USA
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include "swfdec_text.h"
  27 #include "swfdec_debug.h"
  28 #include "swfdec_draw.h"
  29 #include "swfdec_font.h"
  30 #include "swfdec_swf_decoder.h"
  31
  32 G_DEFINE_TYPE (SwfdecText, swfdec_text, SWFDEC_TYPE_GRAPHIC)
  33
  34 static gboolean
  35 swfdec_text_mouse_in (SwfdecGraphic *graphic, double x, double y)
  36 {
  37   guint i;
  38   SwfdecText *text = SWFDEC_TEXT (graphic);
  39
  40   cairo_matrix_transform_point (&text->transform_inverse, &x, &y);
  41   for (i = 0; i < text->glyphs->len; i++) {
  42     SwfdecTextGlyph *glyph;
  43     SwfdecDraw *draw;
  44     double tmpx, tmpy;
  45
  46     glyph = &g_array_index (text->glyphs, SwfdecTextGlyph, i);
  47     draw = swfdec_font_get_glyph (glyph->font, glyph->glyph);
  48     if (draw == NULL)
  49       continue;
  50     tmpx = x - glyph->x;
  51     tmpy = y - glyph->y;
  52     tmpx = tmpx * glyph->font->scale_factor / glyph->height;
  53     tmpy = tmpy * glyph->font->scale_factor / glyph->height;
  54     if (swfdec_draw_contains (draw, tmpx, tmpy))
  55       return TRUE;
  56   }
  57   return FALSE;
  58 }
  59
  60 static void
  61 swfdec_text_render (SwfdecGraphic *graphic, cairo_t *cr,
  62     const SwfdecColorTransform *trans, const SwfdecRect *inval)
  63 {
  64   guint i;
  65   SwfdecColor color;
  66   SwfdecText *text = SWFDEC_TEXT (graphic);
  67   SwfdecColorTransform force_color;
  68   SwfdecRect rect, inval_moved;
  69
  70   cairo_transform (cr, &text->transform);
  71   /* scale by bounds */
  72   swfdec_rect_transform (&inval_moved, inval, &text->transform_inverse);
  73   for (i = 0; i < text->glyphs->len; i++) {
  74     SwfdecTextGlyph *glyph;
  75     SwfdecDraw *draw;
  76     cairo_matrix_t pos;
  77
  78     glyph = &g_array_index (text->glyphs, SwfdecTextGlyph, i);
  79
  80     draw = swfdec_font_get_glyph (glyph->font, glyph->glyph);
  81     if (draw == NULL) {
  82       SWFDEC_INFO ("failed getting glyph %d, maybe an empty glyph?", glyph->glyph);
  83       continue;
  84     }
  85
  86     cairo_matrix_init_translate (&pos,
  87         glyph->x, glyph->y);
  88     cairo_matrix_scale (&pos,
  89         (double) glyph->height / glyph->font->scale_factor,
  90         (double) glyph->height / glyph->font->scale_factor);
  91     cairo_save (cr);
  92     cairo_transform (cr, &pos);
  93     if (!cairo_matrix_invert (&pos)) {
  94       swfdec_rect_transform (&rect, &inval_moved, &pos);
  95       color = swfdec_color_apply_transform (glyph->color, trans);
  96       swfdec_color_transform_init_color (&force_color, color);
  97       swfdec_draw_paint (draw, cr, &force_color);
  98     } else {
  99       SWFDEC_ERROR ("non-invertible matrix!");
 100     }
 101     cairo_restore (cr);
 102   }
 103 }
 104
 105 static void
 106 swfdec_text_dispose (GObject *object)
 107 {
 108   SwfdecText * text = SWFDEC_TEXT (object);
 109
 110   g_array_free (text->glyphs, TRUE);
 111
 112   G_OBJECT_CLASS (swfdec_text_parent_class)->dispose (object);
 113 }
 114
 115 static void
 116 swfdec_text_class_init (SwfdecTextClass * g_class)
 117 {
 118   GObjectClass *object_class = G_OBJECT_CLASS (g_class);
 119   SwfdecGraphicClass *graphic_class = SWFDEC_GRAPHIC_CLASS (g_class);
 120
 121   object_class->dispose = swfdec_text_dispose;
 122
 123   graphic_class->render = swfdec_text_render;
 124   graphic_class->mouse_in = swfdec_text_mouse_in;
 125 }
 126
 127 static void
 128 swfdec_text_init (SwfdecText * text)
 129 {
 130   text->glyphs = g_array_new (FALSE, TRUE, sizeof (SwfdecTextGlyph));
 131   cairo_matrix_init_identity (&text->transform);
 132 }
 133