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-rw-r--r--app/vectors/gimpvectors-export.c333
1 files changed, 333 insertions, 0 deletions
diff --git a/app/vectors/gimpvectors-export.c b/app/vectors/gimpvectors-export.c
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+++ b/app/vectors/gimpvectors-export.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "vectors-types.h"
+
+#include "core/gimpimage.h"
+#include "core/gimpitem.h"
+
+#include "gimpanchor.h"
+#include "gimpstroke.h"
+#include "gimpbezierstroke.h"
+#include "gimpvectors.h"
+#include "gimpvectors-export.h"
+
+#include "gimp-intl.h"
+
+
+static GString * gimp_vectors_export (GimpImage *image,
+ GimpVectors *vectors);
+static void gimp_vectors_export_image_size (GimpImage *image,
+ GString *str);
+static void gimp_vectors_export_path (GimpVectors *vectors,
+ GString *str);
+static gchar * gimp_vectors_export_path_data (GimpVectors *vectors);
+
+
+/**
+ * gimp_vectors_export_file:
+ * @image: the #GimpImage from which to export vectors
+ * @vectors: a #GimpVectors object or %NULL to export all vectors in @image
+ * @file: the file to write
+ * @error: return location for errors
+ *
+ * Exports one or more vectors to a SVG file.
+ *
+ * Return value: %TRUE on success,
+ * %FALSE if there was an error writing the file
+ **/
+gboolean
+gimp_vectors_export_file (GimpImage *image,
+ GimpVectors *vectors,
+ GFile *file,
+ GError **error)
+{
+ GOutputStream *output;
+ GString *string;
+ GError *my_error = NULL;
+
+ g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+ g_return_val_if_fail (vectors == NULL || GIMP_IS_VECTORS (vectors), FALSE);
+ g_return_val_if_fail (G_IS_FILE (file), FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ output = G_OUTPUT_STREAM (g_file_replace (file,
+ NULL, FALSE, G_FILE_CREATE_NONE,
+ NULL, error));
+ if (! output)
+ return FALSE;
+
+ string = gimp_vectors_export (image, vectors);
+
+ if (! g_output_stream_write_all (output, string->str, string->len,
+ NULL, NULL, &my_error))
+ {
+ GCancellable *cancellable = g_cancellable_new ();
+
+ g_set_error (error, my_error->domain, my_error->code,
+ _("Writing SVG file '%s' failed: %s"),
+ gimp_file_get_utf8_name (file), my_error->message);
+ g_clear_error (&my_error);
+ g_string_free (string, TRUE);
+
+ /* Cancel the overwrite initiated by g_file_replace(). */
+ g_cancellable_cancel (cancellable);
+ g_output_stream_close (output, cancellable, NULL);
+ g_object_unref (cancellable);
+ g_object_unref (output);
+
+ return FALSE;
+ }
+
+ g_string_free (string, TRUE);
+ g_object_unref (output);
+
+ return TRUE;
+}
+
+/**
+ * gimp_vectors_export_string:
+ * @image: the #GimpImage from which to export vectors
+ * @vectors: a #GimpVectors object or %NULL to export all vectors in @image
+ *
+ * Exports one or more vectors to a SVG string.
+ *
+ * Return value: a %NUL-terminated string that holds a complete XML document
+ **/
+gchar *
+gimp_vectors_export_string (GimpImage *image,
+ GimpVectors *vectors)
+{
+ g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+ g_return_val_if_fail (vectors == NULL || GIMP_IS_VECTORS (vectors), NULL);
+
+ return g_string_free (gimp_vectors_export (image, vectors), FALSE);
+}
+
+static GString *
+gimp_vectors_export (GimpImage *image,
+ GimpVectors *vectors)
+{
+ GString *str = g_string_new (NULL);
+
+ g_string_append_printf (str,
+ "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n"
+ "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n"
+ " \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
+ "\n"
+ "<svg xmlns=\"http://www.w3.org/2000/svg\"\n");
+
+ g_string_append (str, " ");
+ gimp_vectors_export_image_size (image, str);
+ g_string_append_c (str, '\n');
+
+ g_string_append_printf (str,
+ " viewBox=\"0 0 %d %d\">\n",
+ gimp_image_get_width (image),
+ gimp_image_get_height (image));
+
+ if (vectors)
+ {
+ gimp_vectors_export_path (vectors, str);
+ }
+ else
+ {
+ GList *list;
+
+ for (list = gimp_image_get_vectors_iter (image);
+ list;
+ list = list->next)
+ {
+ gimp_vectors_export_path (GIMP_VECTORS (list->data), str);
+ }
+ }
+
+ g_string_append (str, "</svg>\n");
+
+ return str;
+}
+
+static void
+gimp_vectors_export_image_size (GimpImage *image,
+ GString *str)
+{
+ GimpUnit unit;
+ const gchar *abbrev;
+ gchar wbuf[G_ASCII_DTOSTR_BUF_SIZE];
+ gchar hbuf[G_ASCII_DTOSTR_BUF_SIZE];
+ gdouble xres;
+ gdouble yres;
+ gdouble w, h;
+
+ gimp_image_get_resolution (image, &xres, &yres);
+
+ w = (gdouble) gimp_image_get_width (image) / xres;
+ h = (gdouble) gimp_image_get_height (image) / yres;
+
+ /* FIXME: should probably use the display unit here */
+ unit = gimp_image_get_unit (image);
+ switch (unit)
+ {
+ case GIMP_UNIT_INCH: abbrev = "in"; break;
+ case GIMP_UNIT_MM: abbrev = "mm"; break;
+ case GIMP_UNIT_POINT: abbrev = "pt"; break;
+ case GIMP_UNIT_PICA: abbrev = "pc"; break;
+ default: abbrev = "cm";
+ unit = GIMP_UNIT_MM;
+ w /= 10.0;
+ h /= 10.0;
+ break;
+ }
+
+ g_ascii_formatd (wbuf, sizeof (wbuf), "%g", w * gimp_unit_get_factor (unit));
+ g_ascii_formatd (hbuf, sizeof (hbuf), "%g", h * gimp_unit_get_factor (unit));
+
+ g_string_append_printf (str,
+ "width=\"%s%s\" height=\"%s%s\"",
+ wbuf, abbrev, hbuf, abbrev);
+}
+
+static void
+gimp_vectors_export_path (GimpVectors *vectors,
+ GString *str)
+{
+ const gchar *name = gimp_object_get_name (vectors);
+ gchar *data = gimp_vectors_export_path_data (vectors);
+ gchar *esc_name;
+
+ esc_name = g_markup_escape_text (name, strlen (name));
+
+ g_string_append_printf (str,
+ " <path id=\"%s\"\n"
+ " fill=\"none\" stroke=\"black\" stroke-width=\"1\"\n"
+ " d=\"%s\" />\n",
+ esc_name, data);
+
+ g_free (esc_name);
+ g_free (data);
+}
+
+
+#define NEWLINE "\n "
+
+static gchar *
+gimp_vectors_export_path_data (GimpVectors *vectors)
+{
+ GString *str;
+ GList *strokes;
+ gchar x_string[G_ASCII_DTOSTR_BUF_SIZE];
+ gchar y_string[G_ASCII_DTOSTR_BUF_SIZE];
+ gboolean closed = FALSE;
+
+ str = g_string_new (NULL);
+
+ for (strokes = vectors->strokes->head;
+ strokes;
+ strokes = strokes->next)
+ {
+ GimpStroke *stroke = strokes->data;
+ GArray *control_points;
+ GimpAnchor *anchor;
+ gint i;
+
+ if (closed)
+ g_string_append_printf (str, NEWLINE);
+
+ control_points = gimp_stroke_control_points_get (stroke, &closed);
+
+ if (GIMP_IS_BEZIER_STROKE (stroke))
+ {
+ if (control_points->len >= 3)
+ {
+ anchor = &g_array_index (control_points, GimpAnchor, 1);
+ g_ascii_formatd (x_string, G_ASCII_DTOSTR_BUF_SIZE,
+ "%.2f", anchor->position.x);
+ g_ascii_formatd (y_string, G_ASCII_DTOSTR_BUF_SIZE,
+ "%.2f", anchor->position.y);
+ g_string_append_printf (str, "M %s,%s", x_string, y_string);
+ }
+
+ if (control_points->len > 3)
+ {
+ g_string_append_printf (str, NEWLINE "C");
+ }
+
+ for (i = 2; i < (control_points->len + (closed ? 2 : - 1)); i++)
+ {
+ if (i > 2 && i % 3 == 2)
+ g_string_append_printf (str, NEWLINE " ");
+
+ anchor = &g_array_index (control_points, GimpAnchor,
+ i % control_points->len);
+ g_ascii_formatd (x_string, G_ASCII_DTOSTR_BUF_SIZE,
+ "%.2f", anchor->position.x);
+ g_ascii_formatd (y_string, G_ASCII_DTOSTR_BUF_SIZE,
+ "%.2f", anchor->position.y);
+ g_string_append_printf (str, " %s,%s", x_string, y_string);
+ }
+
+ if (closed && control_points->len > 3)
+ g_string_append_printf (str, " Z");
+ }
+ else
+ {
+ g_printerr ("Unknown stroke type\n");
+
+ if (control_points->len >= 1)
+ {
+ anchor = &g_array_index (control_points, GimpAnchor, 0);
+ g_ascii_formatd (x_string, G_ASCII_DTOSTR_BUF_SIZE,
+ ".2f", anchor->position.x);
+ g_ascii_formatd (y_string, G_ASCII_DTOSTR_BUF_SIZE,
+ ".2f", anchor->position.y);
+ g_string_append_printf (str, "M %s,%s", x_string, y_string);
+ }
+
+ if (control_points->len > 1)
+ {
+ g_string_append_printf (str, NEWLINE "L");
+ }
+
+ for (i = 1; i < control_points->len; i++)
+ {
+ if (i > 1 && i % 3 == 1)
+ g_string_append_printf (str, NEWLINE " ");
+
+ anchor = &g_array_index (control_points, GimpAnchor, i);
+ g_ascii_formatd (x_string, G_ASCII_DTOSTR_BUF_SIZE,
+ "%.2f", anchor->position.x);
+ g_ascii_formatd (y_string, G_ASCII_DTOSTR_BUF_SIZE,
+ "%.2f", anchor->position.y);
+ g_string_append_printf (str, " %s,%s", x_string, y_string);
+ }
+
+ if (closed && control_points->len > 1)
+ g_string_append_printf (str, " Z");
+ }
+
+ g_array_free (control_points, TRUE);
+ }
+
+ return g_strchomp (g_string_free (str, FALSE));
+}
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