mirror of https://github.com/GNOME/gimp.git
443 lines
13 KiB
C
443 lines
13 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <libgimp/gimp.h>
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#include <libgimp/gimpui.h>
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#include "libgimp/stdplugins-intl.h"
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#define EXPORT_PROC "file-header-export"
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#define PLUG_IN_BINARY "file-header"
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#define PLUG_IN_ROLE "gimp-file-header"
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typedef struct _Header Header;
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typedef struct _HeaderClass HeaderClass;
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struct _Header
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{
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GimpPlugIn parent_instance;
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};
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struct _HeaderClass
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{
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GimpPlugInClass parent_class;
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};
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#define HEADER_TYPE (header_get_type ())
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#define HEADER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), HEADER_TYPE, Header))
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GType header_get_type (void) G_GNUC_CONST;
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static GList * header_query_procedures (GimpPlugIn *plug_in);
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static GimpProcedure * header_create_procedure (GimpPlugIn *plug_in,
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const gchar *name);
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static GimpValueArray * header_export (GimpProcedure *procedure,
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GimpRunMode run_mode,
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GimpImage *image,
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GFile *file,
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GimpMetadata *metadata,
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GimpProcedureConfig *config,
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gpointer run_data);
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static gboolean export_image (GFile *file,
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GimpImage *image,
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GimpDrawable *drawable,
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GError **error);
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static gboolean print (GOutputStream *output,
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GError **error,
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const gchar *format,
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...) G_GNUC_PRINTF (3, 4);
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G_DEFINE_TYPE (Header, header, GIMP_TYPE_PLUG_IN)
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GIMP_MAIN (HEADER_TYPE)
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DEFINE_STD_SET_I18N
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static void
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header_class_init (HeaderClass *klass)
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{
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GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
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plug_in_class->query_procedures = header_query_procedures;
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plug_in_class->create_procedure = header_create_procedure;
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plug_in_class->set_i18n = STD_SET_I18N;
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}
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static void
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header_init (Header *header)
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{
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}
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static GList *
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header_query_procedures (GimpPlugIn *plug_in)
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{
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return g_list_append (NULL, g_strdup (EXPORT_PROC));
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}
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static GimpProcedure *
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header_create_procedure (GimpPlugIn *plug_in,
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const gchar *name)
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{
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GimpProcedure *procedure = NULL;
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if (! strcmp (name, EXPORT_PROC))
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{
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procedure = gimp_export_procedure_new (plug_in, name,
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GIMP_PDB_PROC_TYPE_PLUGIN,
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FALSE, header_export, NULL, NULL);
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gimp_procedure_set_image_types (procedure, "INDEXED, RGB");
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gimp_procedure_set_menu_label (procedure, _("C source code header"));
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gimp_procedure_set_documentation (procedure,
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"saves files as C unsigned character "
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"array",
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"FIXME: write help",
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name);
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gimp_procedure_set_attribution (procedure,
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"Spencer Kimball & Peter Mattis",
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"Spencer Kimball & Peter Mattis",
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"1997");
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gimp_file_procedure_set_handles_remote (GIMP_FILE_PROCEDURE (procedure),
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TRUE);
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gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
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"image/x-chdr");
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gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
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"h");
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}
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return procedure;
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}
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static GimpValueArray *
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header_export (GimpProcedure *procedure,
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GimpRunMode run_mode,
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GimpImage *image,
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GFile *file,
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GimpMetadata *metadata,
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GimpProcedureConfig *config,
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gpointer run_data)
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{
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GimpPDBStatusType status = GIMP_PDB_SUCCESS;
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GimpExportReturn export = GIMP_EXPORT_IGNORE;
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GList *drawables;
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GError *error = NULL;
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gegl_init (NULL, NULL);
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export = gimp_export_image (&image,
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GIMP_EXPORT_CAN_HANDLE_RGB |
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GIMP_EXPORT_CAN_HANDLE_INDEXED);
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drawables = gimp_image_list_layers (image);
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if (! export_image (file, image, drawables->data,
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&error))
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{
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status = GIMP_PDB_EXECUTION_ERROR;
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}
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if (export == GIMP_EXPORT_EXPORT)
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gimp_image_delete (image);
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g_list_free (drawables);
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return gimp_procedure_new_return_values (procedure, status, error);
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}
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static gboolean
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export_image (GFile *file,
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GimpImage *image,
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GimpDrawable *drawable,
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GError **error)
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{
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GeglBuffer *buffer;
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const Babl *format;
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GimpImageType drawable_type;
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GOutputStream *output;
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gint x, y, b, c;
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const gchar *backslash = "\\\\";
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const gchar *quote = "\\\"";
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const gchar *newline = "\"\n\t\"";
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gchar buf[4];
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guchar *d = NULL;
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guchar *data = NULL;
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guchar *cmap;
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GCancellable *cancellable;
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gint colors;
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gint width;
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gint height;
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output = G_OUTPUT_STREAM (g_file_replace (file,
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NULL, FALSE, G_FILE_CREATE_NONE,
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NULL, error));
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if (output)
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{
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GOutputStream *buffered;
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buffered = g_buffered_output_stream_new (output);
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g_object_unref (output);
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output = buffered;
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}
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else
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{
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return FALSE;
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}
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buffer = gimp_drawable_get_buffer (drawable);
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width = gegl_buffer_get_width (buffer);
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height = gegl_buffer_get_height (buffer);
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drawable_type = gimp_drawable_type (drawable);
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if (! print (output, error,
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"/* GIMP header image file format (%s): %s */\n\n",
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GIMP_RGB_IMAGE == drawable_type ? "RGB" : "INDEXED",
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gimp_file_get_utf8_name (file)) ||
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! print (output, error,
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"static unsigned int width = %d;\n", width) ||
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! print (output, error,
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"static unsigned int height = %d;\n\n", height) ||
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! print (output, error,
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"/* Call this macro repeatedly. After each use, the pixel data can be extracted */\n\n"))
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{
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goto fail;
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}
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switch (drawable_type)
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{
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case GIMP_RGB_IMAGE:
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if (! print (output, error,
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"#define HEADER_PIXEL(data,pixel) {\\\n"
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"pixel[0] = (((data[0] - 33) << 2) | ((data[1] - 33) >> 4)); \\\n"
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"pixel[1] = ((((data[1] - 33) & 0xF) << 4) | ((data[2] - 33) >> 2)); \\\n"
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"pixel[2] = ((((data[2] - 33) & 0x3) << 6) | ((data[3] - 33))); \\\n"
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"data += 4; \\\n}\n") ||
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! print (output, error,
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"static char *header_data =\n\t\""))
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{
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goto fail;
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}
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format = babl_format ("R'G'B' u8");
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data = g_new (guchar, width * babl_format_get_bytes_per_pixel (format));
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c = 0;
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for (y = 0; y < height; y++)
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{
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gegl_buffer_get (buffer, GEGL_RECTANGLE (0, y, width, 1), 1.0,
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format, data,
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GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
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for (x = 0; x < width; x++)
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{
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d = data + x * babl_format_get_bytes_per_pixel (format);
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buf[0] = ((d[0] >> 2) & 0x3F) + 33;
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buf[1] = ((((d[0] & 0x3) << 4) | (d[1] >> 4)) & 0x3F) + 33;
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buf[2] = ((((d[1] & 0xF) << 2) | (d[2] >> 6)) & 0x3F) + 33;
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buf[3] = (d[2] & 0x3F) + 33;
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for (b = 0; b < 4; b++)
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{
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if (buf[b] == '"')
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{
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if (! print (output, error, "%s", quote))
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goto fail;
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}
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else if (buf[b] == '\\')
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{
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if (! print (output, error, "%s", backslash))
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goto fail;
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}
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else
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{
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if (! print (output, error, "%c", buf[b]))
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goto fail;
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}
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}
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c++;
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if (c >= 16)
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{
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if (! print (output, error, "%s", newline))
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goto fail;
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c = 0;
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}
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}
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}
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if (! print (output, error, "\";\n"))
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goto fail;
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break;
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case GIMP_INDEXED_IMAGE:
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if (! print (output, error,
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"#define HEADER_PIXEL(data,pixel) {\\\n"
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"pixel[0] = header_data_cmap[(unsigned char)data[0]][0]; \\\n"
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"pixel[1] = header_data_cmap[(unsigned char)data[0]][1]; \\\n"
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"pixel[2] = header_data_cmap[(unsigned char)data[0]][2]; \\\n"
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"data ++; }\n\n"))
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{
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goto fail;
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}
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/* save colormap */
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cmap = gimp_image_get_colormap (image, NULL, &colors);
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if (! print (output, error,
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"static unsigned char header_data_cmap[256][3] = {") ||
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! print (output, error,
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"\n\t{%3d,%3d,%3d}",
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(gint) cmap[0], (gint) cmap[1], (gint) cmap[2]))
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{
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goto fail;
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}
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for (c = 1; c < colors; c++)
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{
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if (! print (output, error,
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",\n\t{%3d,%3d,%3d}",
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(gint) cmap[3 * c],
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(gint) cmap[3 * c + 1],
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(gint) cmap[3 * c + 2]))
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{
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goto fail;
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}
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}
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/* fill the rest */
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for ( ; c < 256; c++)
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{
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if (! print (output, error, ",\n\t{255,255,255}"))
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goto fail;
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}
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/* close bracket */
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if (! print (output, error, "\n\t};\n"))
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goto fail;
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g_free (cmap);
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/* save image */
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if (! print (output, error, "static unsigned char header_data[] = {\n\t"))
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goto fail;
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data = g_new (guchar, width * 1);
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c = 0;
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for (y = 0; y < height; y++)
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{
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gegl_buffer_get (buffer, GEGL_RECTANGLE (0, y, width, 1), 1.0,
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NULL, data,
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GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
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for (x = 0; x < width -1; x++)
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{
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d = data + x * 1;
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if (! print (output, error, "%d,", (gint) d[0]))
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goto fail;
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c++;
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if (c >= 16)
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{
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if (! print (output, error, "\n\t"))
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goto fail;
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c = 0;
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}
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}
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if (y != height - 1)
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{
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if (! print (output, error, "%d,\n\t", (gint) d[1]))
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goto fail;
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}
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else
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{
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if (! print (output, error, "%d\n\t", (gint) d[1]))
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goto fail;
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}
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c = 0; /* reset line counter */
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}
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if (! print (output, error, "};\n"))
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goto fail;
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break;
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default:
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g_warning ("unhandled drawable type (%d)", drawable_type);
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goto fail;
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}
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if (! g_output_stream_close (output, NULL, error))
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goto fail;
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g_free (data);
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g_object_unref (output);
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g_object_unref (buffer);
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return TRUE;
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fail:
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cancellable = g_cancellable_new ();
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g_cancellable_cancel (cancellable);
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g_output_stream_close (output, cancellable, NULL);
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g_free (data);
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g_object_unref (output);
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g_object_unref (buffer);
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g_object_unref (cancellable);
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return FALSE;
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}
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static gboolean
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print (GOutputStream *output,
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GError **error,
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const gchar *format,
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...)
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{
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va_list args;
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gboolean success;
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va_start (args, format);
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success = g_output_stream_vprintf (output, NULL, NULL,
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error, format, args);
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va_end (args);
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return success;
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}
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