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pdfviewer1.c
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pdfviewer1.c
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#if 0
#!/bin/bash
src=$0
obj=${src%.*}
gcc -g -Wl,--no-as-needed `pkg-config --cflags --libs poppler-glib glib-2.0 gtk+-2.0 gmodule-2.0` -o $obj $src
$obj
exit
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkwindow.h>
#include <poppler.h>
static PopplerDocument *doc = NULL;
/* Gtk2ではobjectが渡せないのでstatic変数を利用 */
static GtkWidget *darea1 = NULL;
static gboolean
render_page(GtkWidget *widget)
{
/* GtkDrawingAreaにPDFを描画 */
static cairo_surface_t *surface = NULL;
cairo_t *cr;
double width,height;
PopplerPage *page;
GdkWindow *window;
if (doc == NULL) {
return FALSE;
}
if (surface != NULL) {
cairo_surface_destroy(surface);
surface = NULL;
}
/* PDFの1ページ目を表示する。第2引数を変えればそのページを表示 */
page = poppler_document_get_page(doc,0);
/* PDFページのサイズを取得 */
poppler_page_get_size(page, &width, &height);
/* DrawingAreaをPDFページのサイズに設定=等倍 */
gtk_widget_set_size_request(widget,(int)width,(int)height);
/* cairo surface作成 */
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
width,height);
cr = cairo_create(surface);
cairo_save(cr);
/* スケールを等倍 */
cairo_scale(cr,1.0,1.0);
/* surfaceにページを描画 */
poppler_page_render(page,cr);
cairo_restore(cr);
cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
cairo_set_source_rgb (cr, 1., 1., 1.);
cairo_paint (cr);
cairo_destroy (cr);
/* DrawingAreaのGdkWindowを取得 */
window = gtk_widget_get_window(widget);
if (window != NULL) {
/* GdkWindowにsurfaceを設定 */
cr = gdk_cairo_create(window);
cairo_set_source_surface(cr,surface,0,0);
cairo_paint(cr);
cairo_destroy(cr);
}
g_object_unref(page);
}
G_MODULE_EXPORT void
cb_file_set(
GtkFileChooserButton *fc,
gpointer data)
{
gchar *file,*url;
file = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(fc));
if (doc != NULL) {
g_object_unref(doc);
}
/* file://ファイルのフルパスとしてURL作成 */
url = g_strconcat("file://",file,NULL);
/* poppler documentの作成(PDFファイルの読み込み) */
doc = poppler_document_new_from_file(url,NULL,NULL);
g_free(url);
/* DrawingAreaへ描画 */
render_page(darea1);
}
/* Gtk3の場合 */
#if 0
G_MODULE_EXPORT gboolean
cb_draw(GtkWidget *widget,
cairo_t *cr,
gpointer data)
{
return render_page(widget);
}
#else
G_MODULE_EXPORT gboolean
cb_expose(GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
return render_page(widget);
}
#endif
int
main(int argc, char *argv[])
{
GtkBuilder *builder;
GObject *window1;
GObject *entry1;
gtk_init(&argc,&argv);
builder = gtk_builder_new();
gtk_builder_add_from_file(builder, "pdfviewer1.ui", NULL);
gtk_builder_connect_signals(builder, NULL);
window1 = gtk_builder_get_object(builder, "window1");
darea1 = GTK_WIDGET(gtk_builder_get_object(builder, "drawingarea1"));
gtk_widget_show_all(GTK_WIDGET(window1));
gtk_main();
return 0;
}