return xref->last;
}
+gboolean pdf_draw_image(PdfImage *image, struct XrefTable *xref, GString *pdfbuf)
+{
+ char *buf, *p1, *p2;
+ int height, width, stride, x, y, chan;
+ GString *zpix;
+
+ if (gdk_pixbuf_get_bits_per_sample(image->pixbuf) != 8 ||
+ gdk_pixbuf_get_colorspace(image->pixbuf) != GDK_COLORSPACE_RGB) {
+ return FALSE;
+ }
+
+ width = gdk_pixbuf_get_width(image->pixbuf);
+ height = gdk_pixbuf_get_height(image->pixbuf);
+ stride = gdk_pixbuf_get_rowstride(image->pixbuf);
+ chan = gdk_pixbuf_get_n_channels(image->pixbuf);
+ if (!((chan==3 && !image->has_alpha) || (chan==4 && image->has_alpha))) {
+ return FALSE;
+ }
+
+ p2 = buf = (char *)g_malloc(3*width*height);
+ for (y=0; y<height; y++) {
+ p1 = (char *)gdk_pixbuf_get_pixels(image->pixbuf)+stride*y;
+ for (x=0; x<width; x++) {
+ *(p2++)=*(p1++); *(p2++)=*(p1++); *(p2++)=*(p1++);
+ if (chan==4) p1++;
+ }
+ }
+ zpix = do_deflate(buf, 3*width*height);
+ g_free(buf);
+
+ xref->data[image->n_obj] = pdfbuf->len;
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Length %d /Filter /FlateDecode /Type /Xobject "
+ "/Subtype /Image /Width %d /Height %d /ColorSpace /DeviceRGB "
+ "/BitsPerComponent 8 ",
+ image->n_obj, zpix->len, width, height);
+ if (image->has_alpha) {
+ g_string_append_printf(pdfbuf,
+ "/SMask %d 0 R ",
+ image->n_obj_smask);
+ }
+ g_string_append_printf(pdfbuf, " >> stream\n");
+
+ g_string_append_len(pdfbuf, zpix->str, zpix->len);
+ g_string_free(zpix, TRUE);
+ g_string_append(pdfbuf, "endstream\nendobj\n");
+
+ if (image->has_alpha) {
+ p2 = buf = (char *)g_malloc(width*height);
+ for (y=0; y<height; y++) {
+ p1 = (char *)gdk_pixbuf_get_pixels(image->pixbuf)+stride*y;
+ for (x=0; x<width; x++) {
+ p1+=3; /* skip the RGB */
+ *(p2++)=*(p1++); /* just copy the alpha */
+ }
+ }
+ zpix = do_deflate(buf, width*height);
+ g_free(buf);
+
+ xref->data[image->n_obj_smask] = pdfbuf->len;
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Length %d /Filter /FlateDecode /Type /Xobject "
+ "/Subtype /Image /Width %d /Height %d /ColorSpace /DeviceGray "
+ "/BitsPerComponent 8 >> stream\n",
+ image->n_obj_smask, zpix->len, width, height);
+
+ g_string_append_len(pdfbuf, zpix->str, zpix->len);
+ g_string_free(zpix, TRUE);
+ g_string_append(pdfbuf, "endstream\nendobj\n");
+ }
+
+ return TRUE;
+}
+
+
// manipulate Pdf fonts
struct PdfFont *new_pdffont(struct XrefTable *xref, GList **fonts,
g_string_append(pdfbuf, ">> endobj\n");
}
+// Pdf images
+
+struct PdfImage *new_pdfimage(struct XrefTable *xref, GList **images, GdkPixbuf *pixbuf)
+{
+ GList *list;
+ struct PdfImage *image;
+
+ image = g_malloc(sizeof(struct PdfImage));
+ *images = g_list_append(*images, image);
+ image->n_obj = xref->last+1;
+ make_xref(xref, xref->last+1, 0); // will give it a value later
+ image->has_alpha = gdk_pixbuf_get_has_alpha(pixbuf);
+ if (image->has_alpha) {
+ image->n_obj_smask = xref->last+1;
+ make_xref(xref, xref->last+1, 0); // will give it a value later
+ }
+ image->pixbuf = pixbuf;
+
+ return image;
+}
+
// draw a page's graphics
void pdf_draw_page(struct Page *pg, GString *str, gboolean *use_hiliter,
- struct XrefTable *xref, GList **pdffonts)
+ struct XrefTable *xref, GList **pdffonts, GList **pdfimages)
{
GList *layerlist, *itemlist, *tmplist;
struct Layer *l;
int font_id;
FT_Face ftface;
struct PdfFont *cur_font;
+ struct PdfImage *cur_image;
gboolean in_string;
old_rgba = old_text_rgba = 0x12345678; // not any values we use, so we'll reset them
cur_font = (struct PdfFont *)tmplist->data;
cur_font->used_in_this_page = FALSE;
}
+ for (tmplist = *pdfimages; tmplist!=NULL; tmplist = tmplist->next) {
+ cur_image = (struct PdfImage *)tmplist->data;
+ cur_image->used_in_this_page = FALSE;
+ }
for (layerlist = pg->layers; layerlist!=NULL; layerlist = layerlist->next) {
l = (struct Layer *)layerlist->data;
pango_layout_iter_free(iter);
g_object_unref(layout);
}
+ else if (item->type == ITEM_IMAGE) {
+ cur_image = new_pdfimage(xref, pdfimages, item->image);
+ cur_image->used_in_this_page = TRUE;
+ g_string_append_printf(str, "\nq 1 0 0 1 %.2f %.2f cm %.2f 0 0 %.2f 0 %.2f cm /Im%d Do Q ",
+ item->bbox.left, item->bbox.top, // translation
+ item->bbox.right-item->bbox.left, item->bbox.top-item->bbox.bottom, item->bbox.bottom-item->bbox.top, // scaling
+ cur_image->n_obj);
+ }
}
}
}
gboolean use_hiliter;
struct PdfInfo pdfinfo;
struct PdfObj *obj;
- GList *pdffonts, *list;
+ GList *pdffonts, *pdfimages, *list;
struct PdfFont *font;
+ struct PdfImage *image;
char *tmpbuf;
f = fopen(filename, "wb");
xref.data = NULL;
uses_pdf = FALSE;
pdffonts = NULL;
+ pdfimages = NULL;
for (pglist = journal.pages; pglist!=NULL; pglist = pglist->next) {
pg = (struct Page *)pglist->data;
if (pg->bg->type == BG_PDF) uses_pdf = TRUE;
n_obj_bgpix = pdf_draw_bitmap_background(pg, pgstrm, &xref, pdfbuf);
// draw the page contents
use_hiliter = FALSE;
- pdf_draw_page(pg, pgstrm, &use_hiliter, &xref, &pdffonts);
+ pdf_draw_page(pg, pgstrm, &use_hiliter, &xref, &pdffonts, &pdfimages);
g_string_append_printf(pgstrm, "Q\n");
// deflate pgstrm and write it
}
add_dict_subentry(pdfbuf, &xref,
obj, "/ProcSet", PDFTYPE_ARRAY, NULL, mk_pdfname("/PDF"));
- if (n_obj_bgpix>0)
+ if (n_obj_bgpix>0 || pdfimages!=NULL)
add_dict_subentry(pdfbuf, &xref,
obj, "/ProcSet", PDFTYPE_ARRAY, NULL, mk_pdfname("/ImageC"));
if (use_hiliter)
g_free(tmpbuf);
}
}
+ for (list=pdfimages; list!=NULL; list = list->next) {
+ image = (struct PdfImage *)list->data;
+ if (image->used_in_this_page) {
+ tmpbuf = g_strdup_printf("/Im%d", image->n_obj);
+ add_dict_subentry(pdfbuf, &xref,
+ obj, "/XObject", PDFTYPE_DICT, tmpbuf, mk_pdfref(image->n_obj));
+ g_free(tmpbuf);
+ }
+ }
show_pdfobj(obj, pdfbuf);
free_pdfobj(obj);
g_string_append(pdfbuf, " >> endobj\n");
}
- // after the pages, we insert fonts
+ // after the pages, we insert fonts and images
for (list = pdffonts; list!=NULL; list = list->next) {
font = (struct PdfFont *)list->data;
embed_pdffont(pdfbuf, &xref, font);
g_free(font);
}
g_list_free(pdffonts);
+ for (list = pdfimages; list!=NULL; list = list->next) {
+ image = (struct PdfImage *)list->data;
+ if (!pdf_draw_image(image, &xref, pdfbuf)) {
+ return FALSE;
+ }
+ g_free(image);
+ }
+ g_list_free(pdfimages);
// PDF trailer
startxref = pdfbuf->len;
pango_cairo_show_layout(cr, layout);
g_object_unref(layout);
}
+ if (item->type == ITEM_IMAGE) {
+ double scalex = (item->bbox.right-item->bbox.left)/gdk_pixbuf_get_width(item->image);
+ double scaley = (item->bbox.bottom-item->bbox.top)/gdk_pixbuf_get_height(item->image);
+ cairo_scale(cr, scalex, scaley);
+ gdk_cairo_set_source_pixbuf(cr,item->image, item->bbox.left/scalex, item->bbox.top/scaley);
+ cairo_scale(cr, 1/scalex, 1/scaley);
+ cairo_paint(cr);
+ old_rgba = predef_colors_rgba[COLOR_BLACK];
+ cairo_set_source_rgb(cr, 0, 0, 0);
+ }
}
}
}
projects / xournal.git / blobdiff