diff options
Diffstat (limited to 'backend/dvi/dvi-document.c')
| -rw-r--r-- | backend/dvi/dvi-document.c | 610 |
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; +} |