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0.2.4: use DPI
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‎man/pdf2svg.1‎

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Original file line numberDiff line numberDiff line change
@@ -1,10 +1,11 @@
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.TH PDF2SVG 1 "14 Jun 2018" "0.2.3" "User Manual"
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.TH PDF2SVG 1 "02 Jun 2020" "0.2.4" "User Manual"
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.SH NAME
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pdf2svg \- PDF to SVG convertor
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.SH SYNOPSIS
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.B pdf2svg
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.RI pdffile
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.RI svgfile
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.RI [ dpi=72 ]
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.RI [ "page number" ]
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.SH DESCRIPTION
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pdf2svg is a tiny command-line utility using Cairo and Poppler to
@@ -16,20 +17,28 @@ The program does not follow the usual GNU command line syntax.
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The first argument is the source PDF file, the second argument is
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the filename of the output SVG file (or a specification, see below
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for details).
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.SH OPTIONS
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.TP
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.SS dpi
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use DPI (default = 72)
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.TP
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.SS "page number"
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The third parameter is optional and serves as a page selector. If
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omitted it defaults to the first page of the passed PDF. If passed it
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must be a valid page label (typically it is a value such as "iii"
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or "3").
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.SS all
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This special selector causes the program to iterate over all pages
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.B all
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- this special selector causes the program to iterate over all pages
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in the PDF. Because it cannot save multiple pages into one single SVG
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the second parameter is expected to contain a sensible file
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specification:
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.PP
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specification.
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.SH EXAMPLE
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.B pdf2svg
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.RI document.pdf
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.RI output\-page%d.svg
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.RI \fI150\fP
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.RI \fIall\fP
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.PP
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The usual format modificators work as well: \fIoutput\-page%02d.svg\fP

‎pdf2svg.c‎

Lines changed: 156 additions & 128 deletions
Original file line numberDiff line numberDiff line change
@@ -33,142 +33,170 @@
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// Begin theft from ePDFview (Copyright (C) 2006 Emma's Software) under the GPL
3434
gchar *getAbsoluteFileName(const gchar *fileName)
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{
36-
gchar *absoluteFileName = NULL;
37-
if (g_path_is_absolute(fileName)) {
38-
absoluteFileName = g_strdup(fileName);
39-
}
40-
else {
41-
gchar *currentDir = g_get_current_dir();
42-
absoluteFileName = g_build_filename(currentDir, fileName, NULL);
43-
g_free(currentDir);
44-
}
45-
return absoluteFileName;
36+
gchar *absoluteFileName = NULL;
37+
if (g_path_is_absolute(fileName))
38+
{
39+
absoluteFileName = g_strdup(fileName);
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}
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else
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{
43+
gchar *currentDir = g_get_current_dir();
44+
absoluteFileName = g_build_filename(currentDir, fileName, NULL);
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g_free(currentDir);
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}
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return absoluteFileName;
4648
}
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// End theft from ePDFview
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4951

50-
int convertPage(PopplerPage *page, const char* svgFilename)
52+
int convertPage(PopplerPage *page, const char* svgFilename, double dpi)
5153
{
52-
// Poppler stuff
53-
double width, height;
54-
55-
// Cairo stuff
56-
cairo_surface_t *surface;
57-
cairo_t *drawcontext;
58-
59-
if (page == NULL) {
60-
fprintf(stderr, "Page does not exist\n");
61-
return -1;
62-
}
63-
poppler_page_get_size (page, &width, &height);
64-
65-
// Open the SVG file
66-
surface = cairo_svg_surface_create(svgFilename, width, height);
67-
drawcontext = cairo_create(surface);
68-
69-
// Render the PDF file into the SVG file
70-
poppler_page_render_for_printing(page, drawcontext);
71-
cairo_show_page(drawcontext);
72-
73-
// Close the SVG file
74-
cairo_destroy(drawcontext);
75-
cairo_surface_destroy(surface);
76-
77-
// Close the PDF file
78-
g_object_unref(page);
79-
80-
return 0;
54+
// Poppler stuff
55+
double width, height;
56+
57+
// Cairo stuff
58+
cairo_surface_t *surface;
59+
cairo_t *drawcontext;
60+
61+
if (page == NULL)
62+
{
63+
fprintf(stderr, "Page does not exist\n");
64+
return -1;
65+
}
66+
poppler_page_get_size (page, &width, &height);
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68+
// Use DPI
69+
double dpi_ratio = dpi / 72.0;
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71+
// Open the SVG file
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surface = cairo_svg_surface_create(svgFilename, width * dpi_ratio, height * dpi_ratio);
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drawcontext = cairo_create(surface);
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// Use DPI
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cairo_scale(drawcontext, dpi_ratio, dpi_ratio);
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// Render the PDF file into the SVG file
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poppler_page_render_for_printing(page, drawcontext);
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cairo_show_page(drawcontext);
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// Close the SVG file
83+
cairo_destroy(drawcontext);
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cairo_surface_destroy(surface);
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86+
// Close the PDF file
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g_object_unref(page);
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89+
return 0;
8190
}
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8392
int main(int argn, char *args[])
8493
{
85-
// Poppler stuff
86-
PopplerDocument *pdffile;
87-
PopplerPage *page;
88-
89-
// Initialise the GType library
90-
g_type_init ();
91-
92-
// Get command line arguments
93-
if ((argn < 3)||(argn > 4)) {
94-
printf("Usage: pdf2svg <in file.pdf> <out file.svg> [<page no>]\n");
95-
return -2;
96-
}
97-
gchar *absoluteFileName = getAbsoluteFileName(args[1]);
98-
gchar *filename_uri = g_filename_to_uri(absoluteFileName, NULL, NULL);
99-
gchar *pageLabel = NULL;
100-
101-
char* svgFilename = args[2];
102-
103-
g_free(absoluteFileName);
104-
if (argn == 4) {
105-
// Get page number
106-
pageLabel = g_strdup(args[3]);
107-
}
108-
109-
// Open the PDF file
110-
pdffile = poppler_document_new_from_file(filename_uri, NULL, NULL);
111-
g_free(filename_uri);
112-
if (pdffile == NULL) {
113-
fprintf(stderr, "Unable to open file\n");
114-
return -3;
115-
}
116-
117-
int conversionErrors = 0;
118-
// Get the page
119-
120-
if(pageLabel == NULL) {
121-
page = poppler_document_get_page(pdffile, 0);
122-
conversionErrors = convertPage(page, svgFilename);
123-
}
124-
else {
125-
if(strcmp(pageLabel, "all") == 0) {
126-
int curError;
127-
int pageCount = poppler_document_get_n_pages(pdffile);
128-
129-
if(pageCount > 9999999) {
130-
fprintf(stderr, "Too many pages (>9,999,999)\n");
131-
return -5;
132-
}
133-
134-
size_t svgFilenameBufLen = strlen(svgFilename) + 1;
135-
char *svgFilenameBuffer = (char*)malloc(svgFilenameBufLen);
136-
assert(svgFilenameBuffer != NULL);
137-
138-
int pageInd;
139-
for(pageInd = 0; pageInd < pageCount; pageInd++) {
140-
while (1) {
141-
size_t _wr_len = snprintf(svgFilenameBuffer, svgFilenameBufLen, svgFilename, pageInd + 1);
142-
if (_wr_len >= svgFilenameBufLen) {
143-
svgFilenameBufLen = _wr_len + 1;
144-
svgFilenameBuffer = (char*)realloc(svgFilenameBuffer, svgFilenameBufLen);
145-
assert(svgFilenameBuffer != NULL);
146-
continue;
147-
}
148-
break;
149-
}
150-
151-
page = poppler_document_get_page(pdffile, pageInd);
152-
curError = convertPage(page, svgFilenameBuffer);
153-
if(curError != 0)
154-
conversionErrors = -1;
155-
}
156-
free(svgFilenameBuffer);
157-
}
158-
else {
159-
page = poppler_document_get_page_by_label(pdffile, pageLabel);
160-
conversionErrors = convertPage(page, svgFilename);
161-
g_free(pageLabel);
162-
}
163-
}
164-
165-
g_object_unref(pdffile);
166-
167-
if(conversionErrors != 0) {
168-
return -4;
169-
}
170-
else {
171-
return 0;
172-
}
94+
// Poppler stuff
95+
PopplerDocument *pdffile;
96+
PopplerPage *page;
97+
double dpi = 72.0;
98+
99+
// Initialise the GType library
100+
g_type_init ();
101+
102+
// Get command line arguments
103+
if ((argn < 3)||(argn > 5))
104+
{
105+
printf("Usage: pdf2svg <in file.pdf> <out file.svg> [<dpi=72>] [<page no>]\n");
106+
return -2;
107+
}
108+
gchar *absoluteFileName = getAbsoluteFileName(args[1]);
109+
gchar *filename_uri = g_filename_to_uri(absoluteFileName, NULL, NULL);
110+
gchar *pageLabel = NULL;
111+
112+
char* svgFilename = args[2];
113+
114+
g_free(absoluteFileName);
115+
if (argn > 3)
116+
{
117+
// Get DPI
118+
dpi = atof(args[3]);
119+
}
120+
if (argn > 4)
121+
{
122+
// Get page number
123+
pageLabel = g_strdup(args[4]);
124+
}
125+
126+
// Open the PDF file
127+
pdffile = poppler_document_new_from_file(filename_uri, NULL, NULL);
128+
g_free(filename_uri);
129+
if (pdffile == NULL)
130+
{
131+
fprintf(stderr, "Unable to open file\n");
132+
return -3;
133+
}
134+
135+
int conversionErrors = 0;
136+
// Get the page
137+
138+
if(pageLabel == NULL)
139+
{
140+
page = poppler_document_get_page(pdffile, 0);
141+
conversionErrors = convertPage(page, svgFilename, dpi);
142+
}
143+
else
144+
{
145+
if(strcmp(pageLabel, "all") == 0)
146+
{
147+
int curError;
148+
int pageCount = poppler_document_get_n_pages(pdffile);
149+
150+
if(pageCount > 9999999)
151+
{
152+
fprintf(stderr, "Too many pages (>9,999,999)\n");
153+
return -5;
154+
}
155+
156+
size_t svgFilenameBufLen = strlen(svgFilename) + 1;
157+
char *svgFilenameBuffer = (char*)malloc(svgFilenameBufLen);
158+
assert(svgFilenameBuffer != NULL);
159+
160+
int pageInd;
161+
for(pageInd = 0; pageInd < pageCount; pageInd++)
162+
{
163+
while (1)
164+
{
165+
size_t _wr_len = snprintf(svgFilenameBuffer, svgFilenameBufLen, svgFilename, pageInd + 1);
166+
if (_wr_len >= svgFilenameBufLen)
167+
{
168+
svgFilenameBufLen = _wr_len + 1;
169+
svgFilenameBuffer = (char*)realloc(svgFilenameBuffer, svgFilenameBufLen);
170+
assert(svgFilenameBuffer != NULL);
171+
continue;
172+
}
173+
break;
174+
}
175+
176+
page = poppler_document_get_page(pdffile, pageInd);
177+
curError = convertPage(page, svgFilenameBuffer, dpi);
178+
if(curError != 0)
179+
conversionErrors = -1;
180+
}
181+
free(svgFilenameBuffer);
182+
}
183+
else
184+
{
185+
page = poppler_document_get_page_by_label(pdffile, pageLabel);
186+
conversionErrors = convertPage(page, svgFilename, dpi);
187+
g_free(pageLabel);
188+
}
189+
}
190+
191+
g_object_unref(pdffile);
192+
193+
if(conversionErrors != 0)
194+
{
195+
return -4;
196+
}
197+
else
198+
{
199+
return 0;
200+
}
173201

174202
}

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