X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=backend%2Ftiff%2Ftiff-document.c;h=59748d721a276fc05c8370a7bbf61138b6e479d6;hb=4f6105d3df2cbf07bccd7de156693aab7e71bc31;hp=9348ed4efb68e893fe6cb03b707970ca1269da8d;hpb=1d6150237848b4c1fede94ce23baa4fd8870fd93;p=evince.git diff --git a/backend/tiff/tiff-document.c b/backend/tiff/tiff-document.c index 9348ed4e..59748d72 100644 --- a/backend/tiff/tiff-document.c +++ b/backend/tiff/tiff-document.c @@ -149,6 +149,28 @@ tiff_document_get_n_pages (EvDocument *document) return tiff_document->n_pages; } +static void +tiff_document_get_resolution (TiffDocument *tiff_document, + gfloat *x_res, + gfloat *y_res) +{ + gfloat x = 72.0, y = 72.0; + gushort unit; + + if (TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x) && + TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y)) { + if (TIFFGetFieldDefaulted (tiff_document->tiff, TIFFTAG_RESOLUTIONUNIT, &unit)) { + if (unit == RESUNIT_CENTIMETER) { + x *= 2.54; + y *= 2.54; + } + } + } + + *x_res = x; + *y_res = y; +} + static void tiff_document_get_page_size (EvDocument *document, int page, @@ -170,8 +192,7 @@ tiff_document_get_page_size (EvDocument *document, TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &w); TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &h); - TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x_res); - TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y_res); + tiff_document_get_resolution (tiff_document, &x_res, &y_res); h = h * (x_res / y_res); *width = w; @@ -180,9 +201,9 @@ tiff_document_get_page_size (EvDocument *document, pop_handlers (); } -static GdkPixbuf * -tiff_document_render_pixbuf (EvDocument *document, - EvRenderContext *rc) +static cairo_surface_t * +tiff_document_render (EvDocument *document, + EvRenderContext *rc) { TiffDocument *tiff_document = TIFF_DOCUMENT (document); int width, height; @@ -192,6 +213,9 @@ tiff_document_render_pixbuf (EvDocument *document, GdkPixbuf *pixbuf; GdkPixbuf *scaled_pixbuf; GdkPixbuf *rotated_pixbuf; + cairo_surface_t *surface; + cairo_surface_t *rotated_surface; + static const cairo_user_data_key_t key; g_return_val_if_fail (TIFF_IS_DOCUMENT (document), NULL); g_return_val_if_fail (tiff_document->tiff != NULL, NULL); @@ -212,22 +236,87 @@ tiff_document_render_pixbuf (EvDocument *document, return NULL; } - if (!TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x_res)) { + tiff_document_get_resolution (tiff_document, &x_res, &y_res); + + pop_handlers (); + + /* Sanity check the doc */ + if (width <= 0 || height <= 0) + return NULL; + + rowstride = width * 4; + if (rowstride / 4 != width) + /* overflow */ + return NULL; + + bytes = height * rowstride; + if (bytes / rowstride != height) + /* overflow */ + return NULL; + + pixels = g_try_malloc (bytes); + if (!pixels) + return NULL; + + surface = cairo_image_surface_create_for_data (pixels, + CAIRO_FORMAT_ARGB32, + width, height, + rowstride); + cairo_surface_set_user_data (surface, &key, + pixels, (cairo_destroy_func_t)g_free); + + TIFFReadRGBAImageOriented (tiff_document->tiff, + width, height, + (uint32 *)pixels, + ORIENTATION_TOPLEFT, 1); + pop_handlers (); + + rotated_surface = ev_document_misc_surface_rotate_and_scale (surface, + (width * rc->scale) + 0.5, + (height * rc->scale * (x_res / y_res)) + 0.5, + rc->rotation); + cairo_surface_destroy (surface); + + return rotated_surface; +} + +static GdkPixbuf * +tiff_document_render_pixbuf (EvDocument *document, + EvRenderContext *rc) +{ + TiffDocument *tiff_document = TIFF_DOCUMENT (document); + int width, height; + float x_res, y_res; + gint rowstride, bytes; + guchar *pixels = NULL; + GdkPixbuf *pixbuf; + GdkPixbuf *scaled_pixbuf; + GdkPixbuf *rotated_pixbuf; + + push_handlers (); + if (TIFFSetDirectory (tiff_document->tiff, rc->page) != 1) { + pop_handlers (); + return NULL; + } + + if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) { pop_handlers (); return NULL; } - if (! TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y_res)) { + if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) { pop_handlers (); return NULL; } + tiff_document_get_resolution (tiff_document, &x_res, &y_res); + pop_handlers (); /* Sanity check the doc */ if (width <= 0 || height <= 0) return NULL; - + rowstride = width * 4; if (rowstride / 4 != width) /* overflow */ @@ -245,14 +334,15 @@ tiff_document_render_pixbuf (EvDocument *document, pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8, width, height, rowstride, (GdkPixbufDestroyNotify) g_free, NULL); - - pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, width, height); - TIFFReadRGBAImageOriented (tiff_document->tiff, width, height, (uint32 *)gdk_pixbuf_get_pixels (pixbuf), ORIENTATION_TOPLEFT, 1); + TIFFReadRGBAImageOriented (tiff_document->tiff, + width, height, + (uint32 *)pixels, + ORIENTATION_TOPLEFT, 1); pop_handlers (); - + scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf, width * rc->scale, - height * rc->scale * (x_res/y_res), + height * rc->scale * (x_res / y_res), GDK_INTERP_BILINEAR); g_object_unref (pixbuf); @@ -308,7 +398,7 @@ tiff_document_document_iface_init (EvDocumentIface *iface) iface->can_get_text = tiff_document_can_get_text; iface->get_n_pages = tiff_document_get_n_pages; iface->get_page_size = tiff_document_get_page_size; - iface->render_pixbuf = tiff_document_render_pixbuf; + iface->render = tiff_document_render; iface->get_info = tiff_document_get_info; } @@ -360,27 +450,13 @@ tiff_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface) } /* postscript exporter implementation */ - -static gboolean -tiff_document_file_exporter_format_supported (EvFileExporter *exporter, - EvFileExporterFormat format) -{ - return (format == EV_FILE_FORMAT_PS); -} - static void -tiff_document_file_exporter_begin (EvFileExporter *exporter, - EvFileExporterFormat format, - const char *filename, - int first_page, - int last_page, - double width, - double height, - gboolean duplex) +tiff_document_file_exporter_begin (EvFileExporter *exporter, + EvFileExporterContext *fc) { TiffDocument *document = TIFF_DOCUMENT (exporter); - document->ps_export_ctx = tiff2ps_context_new(filename); + document->ps_export_ctx = tiff2ps_context_new(fc->filename); } static void @@ -406,13 +482,23 @@ tiff_document_file_exporter_end (EvFileExporter *exporter) tiff2ps_context_finalize(document->ps_export_ctx); } +static EvFileExporterCapabilities +tiff_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_PS; +} + static void tiff_document_document_file_exporter_iface_init (EvFileExporterIface *iface) { - iface->format_supported = tiff_document_file_exporter_format_supported; iface->begin = tiff_document_file_exporter_begin; iface->do_page = tiff_document_file_exporter_do_page; iface->end = tiff_document_file_exporter_end; + iface->get_capabilities = tiff_document_file_exporter_get_capabilities; } static void