1 files changed, 610 insertions, 0 deletions
diff --git a/backend/dvi/dvi-document.c b/backend/dvi/dvi-document.c
new file mode 100644
index 00000000..a4a3dc6d
--- /dev/null
+++ b/backend/dvi/dvi-document.c
@@ -0,0 +1,610 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
+/*
+ * Copyright (C) 2005, Nickolay V. Shmyrev <[email protected]>
+ *
+ * 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 2, 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+
+#include "dvi-document.h"
+#include "texmfcnf.h"
+#include "ev-document-thumbnails.h"
+#include "ev-document-misc.h"
+#include "ev-file-exporter.h"
+#include "ev-file-helpers.h"
+
+#include "mdvi.h"
+#include "fonts.h"
+#include "color.h"
+#include "cairo-device.h"
+
+#include <glib/gi18n-lib.h>
+#include <ctype.h>
+#ifdef G_OS_WIN32
+# define WIFEXITED(x) ((x) != 3)
+# define WEXITSTATUS(x) (x)
+#else
+# include <sys/wait.h>
+#endif
+#include <stdlib.h>
+
+GMutex *dvi_context_mutex = NULL;
+
+enum {
+ PROP_0,
+ PROP_TITLE
+};
+
+struct _DviDocumentClass
+{
+ EvDocumentClass parent_class;
+};
+
+struct _DviDocument
+{
+ EvDocument parent_instance;
+
+ DviContext *context;
+ DviPageSpec *spec;
+ DviParams *params;
+ 
+ /* To let document scale we should remember width and height */
+ double base_width;
+ double base_height;
+ 
+ gchar *uri;
+
+ /* PDF exporter */
+ gchar *exporter_filename;
+ GString *exporter_opts;
+};
+
+typedef struct _DviDocumentClass DviDocumentClass;
+
+static void dvi_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface);
+static void dvi_document_file_exporter_iface_init (EvFileExporterInterface *iface);
+static void dvi_document_do_color_special (DviContext *dvi,
+ const char *prefix,
+ const char *arg);
+
+EV_BACKEND_REGISTER_WITH_CODE (DviDocument, dvi_document,
+ {
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, dvi_document_document_thumbnails_iface_init);
+ EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER, dvi_document_file_exporter_iface_init);
+ });
+
+static gboolean
+dvi_document_load (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ gchar *filename;
+ DviDocument *dvi_document = DVI_DOCUMENT(document);
+ 
+ filename = g_filename_from_uri (uri, NULL, error);
+ if (!filename)
+ return FALSE;
+ 
+ g_mutex_lock (dvi_context_mutex);
+ if (dvi_document->context)
+ mdvi_destroy_context (dvi_document->context);
+
+ dvi_document->context = mdvi_init_context(dvi_document->params, dvi_document->spec, filename);
+ g_mutex_unlock (dvi_context_mutex);
+ g_free (filename);
+ 
+ if (!dvi_document->context) {
+ g_set_error_literal (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("DVI document has incorrect format"));
+ return FALSE;
+ }
+ 
+ mdvi_cairo_device_init (&dvi_document->context->device);
+ 
+ 
+ dvi_document->base_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv 
+ + 2 * unit2pix(dvi_document->params->dpi, MDVI_HMARGIN) / dvi_document->params->hshrink;
+ 
+ dvi_document->base_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv 
+ + 2 * unit2pix(dvi_document->params->vdpi, MDVI_VMARGIN) / dvi_document->params->vshrink;
+ 
+ g_free (dvi_document->uri);
+ dvi_document->uri = g_strdup (uri);
+ 
+ return TRUE;
+}
+
+
+static gboolean
+dvi_document_save (EvDocument *document,
+ const char *uri,
+ GError **error)
+{
+ DviDocument *dvi_document = DVI_DOCUMENT (document);
+
+ return ev_xfer_uri_simple (dvi_document->uri, uri, error);
+}
+
+static int
+dvi_document_get_n_pages (EvDocument *document)
+{
+ DviDocument *dvi_document = DVI_DOCUMENT (document);
+ 
+ return dvi_document->context->npages;
+}
+
+static void
+dvi_document_get_page_size (EvDocument *document,
+ EvPage *page,
+ double *width,
+ double *height)
+{
+ DviDocument *dvi_document = DVI_DOCUMENT (document); 
+
+ *width = dvi_document->base_width;
+ *height = dvi_document->base_height;;
+}
+
+static cairo_surface_t *
+dvi_document_render (EvDocument *document,
+ EvRenderContext *rc)
+{
+ cairo_surface_t *surface;
+ cairo_surface_t *rotated_surface;
+ DviDocument *dvi_document = DVI_DOCUMENT(document);
+ gint required_width, required_height;
+ gint proposed_width, proposed_height;
+ gint xmargin = 0, ymargin = 0;
+
+ /* We should protect our context since it's not 
+ * thread safe. The work to the future - 
+ * let context render page independently
+ */
+ g_mutex_lock (dvi_context_mutex);
+ 
+ mdvi_setpage (dvi_document->context, rc->page->index);
+ 
+ mdvi_set_shrink (dvi_document->context, 
+ (int)((dvi_document->params->hshrink - 1) / rc->scale) + 1,
+ (int)((dvi_document->params->vshrink - 1) / rc->scale) + 1);
+
+ required_width = dvi_document->base_width * rc->scale + 0.5;
+ required_height = dvi_document->base_height * rc->scale + 0.5;
+ proposed_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv;
+ proposed_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv;
+ 
+ if (required_width >= proposed_width)
+ xmargin = (required_width - proposed_width) / 2;
+ if (required_height >= proposed_height)
+ ymargin = (required_height - proposed_height) / 2;
+ 
+ mdvi_cairo_device_set_margins (&dvi_document->context->device, xmargin, ymargin);
+ mdvi_cairo_device_set_scale (&dvi_document->context->device, rc->scale);
+ mdvi_cairo_device_render (dvi_document->context);
+ surface = mdvi_cairo_device_get_surface (&dvi_document->context->device);
+
+ g_mutex_unlock (dvi_context_mutex);
+
+ rotated_surface = ev_document_misc_surface_rotate_and_scale (surface,
+ required_width,
+ required_height, 
+ rc->rotation);
+ cairo_surface_destroy (surface);
+ 
+ return rotated_surface;
+}
+
+static void
+dvi_document_finalize (GObject *object)
+{ 
+ DviDocument *dvi_document = DVI_DOCUMENT(object);
+ 
+ g_mutex_lock (dvi_context_mutex);
+ if (dvi_document->context) {
+ mdvi_cairo_device_free (&dvi_document->context->device);
+ mdvi_destroy_context (dvi_document->context);
+ }
+ g_mutex_unlock (dvi_context_mutex);
+
+ if (dvi_document->params)
+ g_free (dvi_document->params);
+
+ if (dvi_document->exporter_filename)
+ g_free (dvi_document->exporter_filename);
+ 
+ if (dvi_document->exporter_opts)
+ g_string_free (dvi_document->exporter_opts, TRUE);
+
+ g_free (dvi_document->uri);
+ 
+ G_OBJECT_CLASS (dvi_document_parent_class)->finalize (object);
+}
+
+static gboolean
+dvi_document_support_synctex (EvDocument *document)
+{
+ return TRUE;
+}
+
+static void
+dvi_document_class_init (DviDocumentClass *klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
+ gchar *texmfcnf;
+
+ gobject_class->finalize = dvi_document_finalize;
+
+ texmfcnf = get_texmfcnf();
+ mdvi_init_kpathsea ("evince", MDVI_MFMODE, MDVI_FALLBACK_FONT, MDVI_DPI, texmfcnf);
+ g_free(texmfcnf);
+
+ mdvi_register_special ("Color", "color", NULL, dvi_document_do_color_special, 1);
+ mdvi_register_fonts ();
+
+ dvi_context_mutex = g_mutex_new ();
+
+ ev_document_class->load = dvi_document_load;
+ ev_document_class->save = dvi_document_save;
+ ev_document_class->get_n_pages = dvi_document_get_n_pages;
+ ev_document_class->get_page_size = dvi_document_get_page_size;
+ ev_document_class->render = dvi_document_render;
+ ev_document_class->support_synctex = dvi_document_support_synctex;
+}
+
+static void
+dvi_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
+ EvRenderContext *rc, 
+ gint *width,
+ gint *height)
+{ 
+ DviDocument *dvi_document = DVI_DOCUMENT (document);
+ gdouble page_width = dvi_document->base_width;
+ gdouble page_height = dvi_document->base_height;
+
+ if (rc->rotation == 90 || rc->rotation == 270) {
+ *width = (gint) (page_height * rc->scale);
+ *height = (gint) (page_width * rc->scale);
+ } else {
+ *width = (gint) (page_width * rc->scale);
+ *height = (gint) (page_height * rc->scale);
+ }
+}
+
+static GdkPixbuf *
+dvi_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
+ EvRenderContext *rc, 
+ gboolean border)
+{
+ DviDocument *dvi_document = DVI_DOCUMENT (document);
+ GdkPixbuf *pixbuf;
+ GdkPixbuf *rotated_pixbuf;
+ cairo_surface_t *surface;
+ gint thumb_width, thumb_height;
+ gint proposed_width, proposed_height;
+
+ thumb_width = (gint) (dvi_document->base_width * rc->scale);
+ thumb_height = (gint) (dvi_document->base_height * rc->scale);
+
+ g_mutex_lock (dvi_context_mutex);
+ 
+ mdvi_setpage (dvi_document->context, rc->page->index);
+
+ mdvi_set_shrink (dvi_document->context, 
+ (int)dvi_document->base_width * dvi_document->params->hshrink / thumb_width,
+ (int)dvi_document->base_height * dvi_document->params->vshrink / thumb_height);
+
+ proposed_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv;
+ proposed_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv;
+ 
+ if (border) {
+ mdvi_cairo_device_set_margins (&dvi_document->context->device, 
+ MAX (thumb_width - proposed_width, 0) / 2,
+ MAX (thumb_height - proposed_height, 0) / 2); 
+ } else {
+ mdvi_cairo_device_set_margins (&dvi_document->context->device, 
+ MAX (thumb_width - proposed_width - 2, 0) / 2,
+ MAX (thumb_height - proposed_height - 2, 0) / 2); 
+ }
+
+ mdvi_cairo_device_set_scale (&dvi_document->context->device, rc->scale);
+ mdvi_cairo_device_render (dvi_document->context);
+ surface = mdvi_cairo_device_get_surface (&dvi_document->context->device);
+ g_mutex_unlock (dvi_context_mutex);
+
+ pixbuf = ev_document_misc_pixbuf_from_surface (surface);
+ cairo_surface_destroy (surface);
+
+ rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
+ g_object_unref (pixbuf);
+
+ if (border) {
+ GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
+
+ rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
+ g_object_unref (tmp_pixbuf);
+ }
+
+ return rotated_pixbuf;
+}
+
+static void
+dvi_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface)
+{
+ iface->get_thumbnail = dvi_document_thumbnails_get_thumbnail;
+ iface->get_dimensions = dvi_document_thumbnails_get_dimensions;
+}
+
+/* EvFileExporterIface */
+static void
+dvi_document_file_exporter_begin (EvFileExporter *exporter,
+ EvFileExporterContext *fc)
+{
+ DviDocument *dvi_document = DVI_DOCUMENT(exporter);
+ 
+ if (dvi_document->exporter_filename)
+ g_free (dvi_document->exporter_filename); 
+ dvi_document->exporter_filename = g_strdup (fc->filename);
+ 
+ if (dvi_document->exporter_opts) {
+ g_string_free (dvi_document->exporter_opts, TRUE);
+ }
+ dvi_document->exporter_opts = g_string_new ("-s ");
+}
+
+static void
+dvi_document_file_exporter_do_page (EvFileExporter *exporter,
+ EvRenderContext *rc)
+{
+ DviDocument *dvi_document = DVI_DOCUMENT(exporter);
+
+ g_string_append_printf (dvi_document->exporter_opts, "%d,", (rc->page->index) + 1);
+}
+
+static void
+dvi_document_file_exporter_end (EvFileExporter *exporter)
+{
+ gchar *command_line;
+ gint exit_stat;
+ GError *err = NULL;
+ gboolean success;
+ 
+ DviDocument *dvi_document = DVI_DOCUMENT(exporter);
+ 
+ command_line = g_strdup_printf ("dvipdfm %s -o %s \"%s\"", /* dvipdfm -s 1,2,.., -o exporter_filename dvi_filename */
+ dvi_document->exporter_opts->str,
+ dvi_document->exporter_filename,
+ dvi_document->context->filename);
+ 
+ success = g_spawn_command_line_sync (command_line,
+ NULL,
+ NULL,
+ &exit_stat,
+ &err);
+
+ g_free (command_line);
+
+ if (success == FALSE) {
+ g_warning ("Error: %s", err->message);
+ } else if (!WIFEXITED(exit_stat) || WEXITSTATUS(exit_stat) != EXIT_SUCCESS){
+ g_warning ("Error: dvipdfm does not end normally or exit with a failure status.");
+ }
+
+ if (err)
+ g_error_free (err);
+}
+
+static EvFileExporterCapabilities
+dvi_document_file_exporter_get_capabilities (EvFileExporter *exporter)
+{
+ return EV_FILE_EXPORTER_CAN_PAGE_SET |
+ EV_FILE_EXPORTER_CAN_COPIES |
+ EV_FILE_EXPORTER_CAN_COLLATE |
+ EV_FILE_EXPORTER_CAN_REVERSE |
+ EV_FILE_EXPORTER_CAN_GENERATE_PDF;
+}
+
+static void
+dvi_document_file_exporter_iface_init (EvFileExporterInterface *iface)
+{
+ iface->begin = dvi_document_file_exporter_begin;
+ iface->do_page = dvi_document_file_exporter_do_page;
+ iface->end = dvi_document_file_exporter_end;
+ iface->get_capabilities = dvi_document_file_exporter_get_capabilities;
+}
+
+#define RGB2ULONG(r,g,b) ((0xFF<<24)|(r<<16)|(g<<8)|(b))
+
+static gboolean
+hsb2rgb (float h, float s, float v, guchar *red, guchar *green, guchar *blue)
+{
+ float i, f, p, q, t, r, g, b;
+
+ if (h == 360)
+ h = 0;
+ else if ((h > 360) || (h < 0))
+ return FALSE;
+
+ s /= 100;
+ v /= 100;
+ h /= 60;
+ i = floor (h);
+ f = h - i;
+ p = v * (1 - s);
+ q = v * (1 - (s * f));
+ t = v * (1 - (s * (1 - f)));
+
+ if (i == 0) {
+ r = v;
+ g = t;
+ b = p;
+ } else if (i == 1) {
+ r = q;
+ g = v;
+ b = p;
+ } else if (i == 2) {
+ r = p;
+ g = v;
+ b = t;
+ } else if (i == 3) {
+ r = p;
+ g = q;
+ b = v;
+ } else if (i == 4) {
+ r = t;
+ g = p;
+ b = v;
+ } else if (i == 5) {
+ r = v;
+ g = p;
+ b = q;
+ }
+
+ *red = (guchar)floor(r * 255.0);
+ *green = (guchar)floor(g * 255.0);
+ *blue = (guchar)floor(b * 255.0);
+ 
+ return TRUE;
+}
+
+static void
+parse_color (const gchar *ptr,
+ gdouble *color,
+ gint n_color)
+{
+ gchar *p = (gchar *)ptr;
+ gint i;
+
+ for (i = 0; i < n_color; i++) {
+ while (isspace (*p)) p++;
+ color[i] = g_ascii_strtod (p, NULL);
+ while (!isspace (*p) && *p != '\0') p++;
+ if (*p == '\0')
+ break;
+ }
+}
+
+static void
+dvi_document_do_color_special (DviContext *dvi, const char *prefix, const char *arg)
+{
+ if (strncmp (arg, "pop", 3) == 0) {
+ mdvi_pop_color (dvi);
+ } else if (strncmp (arg, "push", 4) == 0) {
+ /* Find color source: Named, CMYK or RGB */
+ const char *tmp = arg + 4;
+ 
+ while (isspace (*tmp)) tmp++;
+
+ if (!strncmp ("rgb", tmp, 3)) {
+ gdouble rgb[3];
+ guchar red, green, blue;
+
+ parse_color (tmp + 4, rgb, 3);
+ 
+ red = 255 * rgb[0];
+ green = 255 * rgb[1];
+ blue = 255 * rgb[2];
+
+ mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
+ } else if (!strncmp ("hsb", tmp, 4)) {
+ gdouble hsb[3];
+ guchar red, green, blue;
+
+ parse_color (tmp + 4, hsb, 3);
+ 
+ if (hsb2rgb (hsb[0], hsb[1], hsb[2], &red, &green, &blue))
+ mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
+ } else if (!strncmp ("cmyk", tmp, 4)) {
+ gdouble cmyk[4];
+ double r, g, b;
+ guchar red, green, blue;
+ 
+ parse_color (tmp + 5, cmyk, 4);
+
+ r = 1.0 - cmyk[0] - cmyk[3];
+ if (r < 0.0)
+ r = 0.0;
+ g = 1.0 - cmyk[1] - cmyk[3];
+ if (g < 0.0)
+ g = 0.0;
+ b = 1.0 - cmyk[2] - cmyk[3];
+ if (b < 0.0)
+ b = 0.0;
+
+ red = r * 255 + 0.5;
+ green = g * 255 + 0.5;
+ blue = b * 255 + 0.5;
+ 
+ mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
+ } else if (!strncmp ("gray ", tmp, 5)) {
+ gdouble gray;
+ guchar rgb;
+
+ parse_color (tmp + 5, &gray, 1);
+
+ rgb = gray * 255 + 0.5;
+
+ mdvi_push_color (dvi, RGB2ULONG (rgb, rgb, rgb), 0xFFFFFFFF);
+ } else {
+ GdkColor color;
+ 
+ if (gdk_color_parse (tmp, &color)) {
+ guchar red, green, blue;
+
+ red = color.red * 255 / 65535.;
+ green = color.green * 255 / 65535.;
+ blue = color.blue * 255 / 65535.;
+
+ mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
+ }
+ }
+ }
+}
+
+static void
+dvi_document_init_params (DviDocument *dvi_document)
+{ 
+ dvi_document->params = g_new0 (DviParams, 1); 
+
+ dvi_document->params->dpi = MDVI_DPI;
+ dvi_document->params->vdpi = MDVI_VDPI;
+ dvi_document->params->mag = MDVI_MAGNIFICATION;
+ dvi_document->params->density = MDVI_DEFAULT_DENSITY;
+ dvi_document->params->gamma = MDVI_DEFAULT_GAMMA;
+ dvi_document->params->flags = MDVI_PARAM_ANTIALIASED;
+ dvi_document->params->hdrift = 0;
+ dvi_document->params->vdrift = 0;
+ dvi_document->params->hshrink = MDVI_SHRINK_FROM_DPI(dvi_document->params->dpi);
+ dvi_document->params->vshrink = MDVI_SHRINK_FROM_DPI(dvi_document->params->vdpi);
+ dvi_document->params->orientation = MDVI_ORIENT_TBLR;
+
+ dvi_document->spec = NULL;
+ 
+ dvi_document->params->bg = 0xffffffff;
+ dvi_document->params->fg = 0xff000000;
+}
+
+static void
+dvi_document_init (DviDocument *dvi_document)
+{
+ dvi_document->context = NULL;
+ dvi_document_init_params (dvi_document);
+
+ dvi_document->exporter_filename = NULL;
+ dvi_document->exporter_opts = NULL;
+}