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-rw-r--r--utils/viewer-cairo.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/utils/viewer-cairo.c b/utils/viewer-cairo.c
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+/* viewer-cairo.c: Common code for Cairo-based viewers
+ *
+ * Copyright (C) 1999,2004,2005 Red Hat, Inc.
+ * Copyright (C) 2001 Sun Microsystems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#include "config.h"
+
+#include "viewer-cairo.h"
+#include "viewer-render.h"
+
+#include <cairo.h>
+
+#include <string.h>
+
+
+
+#ifdef HAVE_CAIRO_XLIB
+#ifdef HAVE_XFT
+#include "viewer-x.h"
+#include <cairo-xlib.h>
+
+static cairo_surface_t *
+cairo_x_view_iface_create_surface (gpointer instance,
+ gpointer surface,
+ int width,
+ int height)
+{
+ XViewer *x = (XViewer *)instance;
+ Drawable drawable = (Drawable) surface;
+
+ return cairo_xlib_surface_create (x->display, drawable,
+ DefaultVisual (x->display, x->screen),
+ width, height);
+}
+
+static void
+cairo_x_view_iface_paint_background (gpointer instance G_GNUC_UNUSED,
+ cairo_t *cr)
+{
+ cairo_set_source_rgb (cr, 1, 1, 1);
+ cairo_paint (cr);
+
+ if (opt_bg_set)
+ {
+ cairo_set_source_rgba (cr,
+ opt_bg_color.red / 65535.,
+ opt_bg_color.green / 65535.,
+ opt_bg_color.blue / 65535.,
+ opt_bg_alpha / 65535.);
+ cairo_paint (cr);
+ }
+}
+
+static CairoViewerIface cairo_x_viewer_iface = {
+ &x_viewer,
+ cairo_x_view_iface_create_surface,
+ cairo_x_view_iface_paint_background
+};
+#endif /* HAVE_XFT */
+#endif /* HAVE_CAIRO_XLIB */
+
+
+
+
+static cairo_surface_t *
+cairo_view_iface_create_surface (gpointer instance,
+ gpointer surface,
+ int width,
+ int height)
+{
+ return cairo_surface_reference (surface);
+}
+
+
+
+static gpointer
+cairo_image_view_create (const PangoViewer *klass G_GNUC_UNUSED)
+{
+ return NULL;
+}
+
+static void
+cairo_image_view_destroy (gpointer instance G_GNUC_UNUSED)
+{
+}
+
+static gpointer
+cairo_image_view_create_surface (gpointer instance,
+ int width,
+ int height)
+{
+ cairo_t *cr;
+ cairo_surface_t *surface;
+
+ /* TODO: Be smarter about format? */
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
+
+ cr = cairo_create (surface);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_paint (cr);
+ cairo_destroy (cr);
+
+ return surface;
+}
+
+static void
+cairo_image_view_destroy_surface (gpointer instance,
+ gpointer surface)
+{
+ cairo_surface_destroy (surface);
+}
+
+const PangoViewer cairo_image_viewer = {
+ "CairoImage",
+ NULL,
+ NULL,
+ cairo_image_view_create,
+ cairo_image_view_destroy,
+ NULL,
+ cairo_image_view_create_surface,
+ cairo_image_view_destroy_surface,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+static void
+cairo_image_view_iface_paint_background (gpointer instance G_GNUC_UNUSED,
+ cairo_t *cr)
+{
+ cairo_set_source_rgb (cr, 1, 1, 1);
+ cairo_paint (cr);
+
+ if (opt_bg_set)
+ {
+ cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+ cairo_set_source_rgba (cr,
+ opt_bg_color.red / 65535.,
+ opt_bg_color.green / 65535.,
+ opt_bg_color.blue / 65535.,
+ opt_bg_alpha / 65535.);
+ cairo_paint (cr);
+ }
+}
+
+static CairoViewerIface cairo_image_viewer_iface = {
+ &cairo_image_viewer,
+ cairo_view_iface_create_surface,
+ cairo_image_view_iface_paint_background
+};
+
+
+
+
+#ifdef CAIRO_HAS_SVG_SURFACE
+# include <cairo-svg.h>
+#endif
+#ifdef CAIRO_HAS_PDF_SURFACE
+# include <cairo-pdf.h>
+#endif
+#ifdef CAIRO_HAS_PS_SURFACE
+# include <cairo-ps.h>
+# if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1,6,0)
+# define HAS_EPS 1
+
+static cairo_surface_t *
+_cairo_eps_surface_create (const char *filename,
+ double width,
+ double height)
+{
+ cairo_surface_t *surface;
+
+ surface = cairo_ps_surface_create (filename, width, height);
+ cairo_ps_surface_set_eps (surface, TRUE);
+
+ return surface;
+}
+
+# else
+# undef HAS_EPS
+# endif
+#endif
+
+typedef cairo_surface_t *(*CairoVectorFileCreateFunc) (const char *filename,
+ double width,
+ double height);
+
+typedef struct
+{
+ const char *filename;
+ CairoVectorFileCreateFunc constructor;
+} CairoVectorViewer;
+
+static gpointer
+cairo_vector_view_create (const PangoViewer *klass G_GNUC_UNUSED)
+{
+ const char *extension = NULL;
+ CairoVectorFileCreateFunc constructor = NULL;
+
+ if (opt_output)
+ {
+ extension = strrchr (opt_output, '.');
+ if (extension)
+ extension++; /* skip the dot */
+ }
+
+ if (!extension)
+ return NULL;
+
+ if (0)
+ ;
+ #ifdef CAIRO_HAS_SVG_SURFACE
+ else if (0 == g_ascii_strcasecmp (extension, "svg"))
+ constructor = cairo_svg_surface_create;
+ #endif
+ #ifdef CAIRO_HAS_PDF_SURFACE
+ else if (0 == g_ascii_strcasecmp (extension, "pdf"))
+ constructor = cairo_pdf_surface_create;
+ #endif
+ #ifdef CAIRO_HAS_PS_SURFACE
+ else if (0 == g_ascii_strcasecmp (extension, "ps"))
+ constructor = cairo_ps_surface_create;
+ #ifdef HAS_EPS
+ else if (0 == g_ascii_strcasecmp (extension, "eps"))
+ constructor = _cairo_eps_surface_create;
+ #endif
+ #endif
+
+ if (constructor)
+ {
+ CairoVectorViewer *instance;
+
+ instance = g_slice_new (CairoVectorViewer);
+
+ /* save output filename and unset it such that the viewer layer
+ * doesn't try to save to file.
+ */
+ instance->filename = opt_output;
+ opt_output = NULL;
+
+ instance->constructor = constructor;
+
+ /* Fix dpi on 72. That's what cairo vector surfaces are. */
+ opt_dpi = 72;
+
+ return instance;
+ }
+
+ return NULL;
+}
+
+static void
+cairo_vector_view_destroy (gpointer instance G_GNUC_UNUSED)
+{
+ CairoVectorViewer *c = (CairoVectorViewer *) instance;
+
+ g_slice_free (CairoVectorViewer, c);
+}
+
+static gpointer
+cairo_vector_view_create_surface (gpointer instance,
+ int width,
+ int height)
+{
+ CairoVectorViewer *c = (CairoVectorViewer *) instance;
+ cairo_surface_t *surface;
+
+ surface = c->constructor (c->filename, width, height);
+
+ /*cairo_surface_set_fallback_resolution (surface, fallback_resolution_x, fallback_resolution_y);*/
+
+ return surface;
+}
+
+static void
+cairo_vector_view_destroy_surface (gpointer instance,
+ gpointer surface)
+{
+ /* TODO: check for errors */
+ cairo_surface_destroy (surface);
+}
+
+const PangoViewer cairo_vector_viewer = {
+ "CairoFile",
+ NULL,
+ NULL,
+ cairo_vector_view_create,
+ cairo_vector_view_destroy,
+ NULL,
+ cairo_vector_view_create_surface,
+ cairo_vector_view_destroy_surface,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+static void
+cairo_vector_view_iface_paint_background (gpointer instance G_GNUC_UNUSED,
+ cairo_t *cr)
+{
+ if (opt_bg_set)
+ {
+ cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+ cairo_set_source_rgba (cr,
+ opt_bg_color.red / 65535.,
+ opt_bg_color.green / 65535.,
+ opt_bg_color.blue / 65535.,
+ opt_bg_alpha / 65535.);
+ cairo_paint (cr);
+ }
+}
+
+static CairoViewerIface cairo_vector_viewer_iface = {
+ &cairo_vector_viewer,
+ cairo_view_iface_create_surface,
+ cairo_vector_view_iface_paint_background
+};
+
+
+
+gpointer
+cairo_viewer_iface_create (const CairoViewerIface **iface)
+{
+ gpointer ret;
+
+ *iface = &cairo_vector_viewer_iface;
+ ret = (*iface)->backend_class->create ((*iface)->backend_class);
+ if (ret)
+ return ret;
+
+#ifdef HAVE_CAIRO_XLIB
+#ifdef HAVE_XFT
+ if (opt_display)
+ {
+ *iface = &cairo_x_viewer_iface;
+ return (*iface)->backend_class->create ((*iface)->backend_class);
+ }
+#endif /* HAVE_XFT */
+#endif /* HAVE_CAIRO_XLIB */
+
+ *iface = &cairo_image_viewer_iface;
+ return (*iface)->backend_class->create ((*iface)->backend_class);
+}
+
+void
+cairo_viewer_add_options (GOptionGroup *group G_GNUC_UNUSED)
+{
+}
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