evas_generic_loaders: add a rsvg generic loader.

NOTE: we have to much user complaining about instability in
e17 due to librsvg. Moving it to a generic loader "resolve"
this issue...


SVN revision: 71222

6 files changed, 255 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index affb093..487d24a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,3 +13,8 @@
 2012-04-26 Carsten Haitzler (The Rasterman)
 
         1.2.0 release
+
+2012-05-18  Cedric Bail
+
+	* Make rsvg backend use the generic backend as it is our main
+	source of crash in e17.
diff --git a/NEWS b/NEWS
index c3ffaf3..a76ebdd 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+Evas Generic Loaders 1.3.0
+
+Changes since Evas Generic Loaders 1.2.0:
+-----------------------------------------
+
+Additions:
+
+   * Add a librsvg generic loader.
+
 Evas Generic Loaders 1.2.0
 
 Changes since Evas Generic Loaders 1.1.0:
diff --git a/configure.ac b/configure.ac
index cc20d90..c2b0573 100644
--- a/configure.ac
+++ b/configure.ac
@@ -66,6 +66,8 @@ PKG_CHECK_MODULES([SPECTRE], [libspectre], [have_ps="yes"], [have_ps="no"])
 
 PKG_CHECK_MODULES([LIBRAW], [libraw], [have_raw="yes"], [have_raw="no"])
 
+PKG_CHECK_MODULES([SVG],  [librsvg-2.0 >= 2.14.0 cairo >= 1.0.0], [have_svg="yes"], [have_svg="no"])
+
 GST_REQS=0.10.13
 GSTPLUG_REQS=0.10.13
 GST_MAJORMINOR=0.10
@@ -81,6 +83,7 @@ AM_CONDITIONAL(HAVE_GST, test "x${have_gst}" = "xyes")
 AM_CONDITIONAL([HAVE_PDF], [test "x${have_poppler}" = "xyes"])
 AM_CONDITIONAL([HAVE_PS], [test "x${have_ps}" = "xyes"])
 AM_CONDITIONAL(HAVE_RAW, [test "x${have_raw}" = "xyes"])
+AM_CONDITIONAL([HAVE_SVG], [test "x${have_svg}" = "xyes"])
 
 ### Checks for header files
 
@@ -137,6 +140,7 @@ src/bin/pdf/Makefile
 src/bin/ps/Makefile
 src/bin/raw/Makefile
 src/bin/xcf/Makefile
+src/bin/svg/Makefile
 ])
 
 AC_OUTPUT
@@ -160,6 +164,7 @@ echo "  Gstreamer............: ${have_gst}"
 echo "  PDF..................: ${have_poppler}"
 echo "  PS...................: ${have_ps}"
 echo "  RAW..................: ${have_raw}"
+echo "  SVG..................: ${have_svg}"
 echo
 echo "Compilation............: make (or gmake)"
 echo "  CPPFLAGS.............: $CPPFLAGS"
diff --git a/src/bin/Makefile.am b/src/bin/Makefile.am
index ac0215d..040ae49 100644
--- a/src/bin/Makefile.am
+++ b/src/bin/Makefile.am
@@ -19,3 +19,6 @@ if HAVE_RAW
 SUBDIRS += raw
 endif
 
+if HAVE_SVG
+SUBDIRS += svg
+endif
diff --git a/src/bin/svg/Makefile.am b/src/bin/svg/Makefile.am
new file mode 100644
index 0000000..6ea0778
--- /dev/null
+++ b/src/bin/svg/Makefile.am
@@ -0,0 +1,21 @@
+MAINTAINERCLEANFILES = Makefile.in
+
+AM_CPPFLAGS = \
+-I$(top_srcdir) \
+-I$(top_srcdir)/src \
+-I$(top_srcdir)/src/bin \
+-I$(top_srcdir)/src/bin/common \
+-I$(top_srcdir)/src/bin/svg \
+-DPACKAGE_BIN_DIR=\"$(bindir)\" \
+-DPACKAGE_LIB_DIR=\"$(libdir)\" \
+-DPACKAGE_DATA_DIR=\"$(datadir)/$(PACKAGE)\" \
+@EINA_CFLAGS@
+
+bin_PROGRAMS = evas_image_loader.svg
+bindir = $(libdir)/evas/utils
+
+evas_image_loader_svg_SOURCES = main.c $(top_srcdir)/src/bin/common/shmfile.c
+evas_image_loader_svg_CFLAGS = @SVG_CFLAGS@
+evas_image_loader_svg_LDADD = @SVG_LIBS@ @SHM_OPEN_LIBS@ -lm
+evas_image_loader_svg_LDFLAGS =
+
diff --git a/src/bin/svg/main.c b/src/bin/svg/main.c
new file mode 100644
index 0000000..021fc64
--- /dev/null
+++ b/src/bin/svg/main.c
@@ -0,0 +1,212 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include "shmfile.h"
+
+#include <Eina.h>
+
+#include <librsvg/rsvg.h>
+#include <librsvg/rsvg-cairo.h>
+
+#define DATA32 unsigned int
+
+static RsvgHandle *rsvg = NULL;
+static int width = 0;
+static int height = 0;
+static RsvgDimensionData dim;
+
+static inline Eina_Bool evas_image_load_file_is_svg(const char *file)
+{
+   int i, len = strlen(file);
+   Eina_Bool is_gz = EINA_FALSE;
+
+   for (i = len - 1; i > 0; i--)
+     {
+	if (file[i] == '.')
+	  {
+	     if (is_gz)
+	       break;
+	     else if (strcasecmp(file + i + 1, "gz") == 0)
+	       is_gz = EINA_TRUE;
+	     else
+	       break;
+	  }
+     }
+
+   if (i < 1) return EINA_FALSE;
+   i++;
+   if (i >= len) return EINA_FALSE;
+   if (strncasecmp(file + i, "svg", 3) != 0) return EINA_FALSE;
+   i += 3;
+   if (is_gz)
+     {
+	if (file[i] == '.') return EINA_TRUE;
+	else return EINA_FALSE;
+     }
+   else
+     {
+	if (file[i] == '\0') return EINA_TRUE;
+	else if (((file[i] == 'z') || (file[i] == 'Z')) && (!file[i + 1])) return EINA_TRUE;
+	else return EINA_FALSE;
+     }
+}
+
+static int
+_svg_init(const char *file)
+{
+   rsvg_init();
+
+   if (!evas_image_load_file_is_svg(file)) return 0;
+
+   rsvg = rsvg_handle_new_from_file(file, NULL);
+
+   return 1;
+}
+
+static void
+_svg_shutdown(void)
+{
+   if (rsvg)
+     {
+        rsvg_handle_close(rsvg, NULL);
+        g_object_unref(rsvg);
+     }
+   // Maybe it's not crashing anymore, let's try it.
+   rsvg_term();
+}
+
+static int
+read_svg_header(int scale_down, double dpi, int size_w, int size_h)
+{
+   rsvg_handle_set_dpi(rsvg, 75.0);
+   rsvg_handle_get_dimensions(rsvg, &dim);
+   width = dim.width;
+   height = dim.height;
+
+   if ((width < 1) || (height < 1)) return 0;
+
+   if (scale_down > 1)
+     {
+        width /= scale_down;
+        height /= scale_down;
+     }
+   else if (dpi > 0.0)
+     {
+        width = (width * dpi) / 75;
+        height = (height * dpi) / 75;
+     }
+   else if (size_w > 0 && size_h > 0)
+     {
+        int w, h;
+
+        w = size_w;
+        h = (size_w * height) / width;
+        if (h > size_h)
+          {
+             h = size_h;
+             w = (size_h * width) / height;
+          }
+        width = w;
+        height = h;
+     }
+   if (width < 1) width = 1;
+   if (height < 1) height = 1;
+
+   return 1;
+}
+
+static int
+read_svg_data(void)
+{
+   cairo_surface_t *surface;
+   cairo_t *cr;
+
+   shm_alloc(width * height * (sizeof(DATA32)));
+   if (!shm_addr) return 0;
+
+   memset(shm_addr, 0, width * height * sizeof (DATA32));
+   surface = cairo_image_surface_create_for_data((unsigned char *)shm_addr, CAIRO_FORMAT_ARGB32,
+                                                 width, height, width * sizeof(DATA32));;
+   if (!surface) return 0;
+
+   cr = cairo_create(surface);
+   if (!cr) return 0;
+
+   cairo_scale(cr, (double) width / dim.em, (double) height / dim.ex);
+   rsvg_handle_render_cairo(rsvg, cr);
+   cairo_surface_destroy(surface);
+   cairo_destroy(cr);
+
+   return 1;
+}
+
+int main(int argc, char **argv)
+{
+   char *file;
+   int i;
+   int head_only = 0;
+   int scale_down = 0;
+   double dpi = 0.0;
+   int size_w = 0, size_h = 0;
+
+   if (argc < 2) return -1;
+   file = argv[1];
+
+   for (i = 2; i < argc; ++i)
+     {
+        if (!strcmp(argv[i], "-head"))
+          head_only = 1;
+        else if (!strcmp(argv[i], "-key"))
+          { // not used by svg loader
+             i++;
+             // const char *key = argv[i];
+          }
+        else if (!strcmp(argv[i], "-opt-scale-down-by"))
+          {
+             i++;
+             scale_down = atoi(argv[i]);
+          }
+        else if (!strcmp(argv[i], "-opt-dpi"))
+          {
+             i++;
+             dpi = ((double)atoi(argv[i])) / 1000.0;
+          }
+        else if (!strcmp(argv[i], "-opt-size"))
+          {
+             i++;
+             size_w = atoi(argv[i]);
+             i++;
+             size_h = atoi(argv[i]);
+          }
+     }
+
+   if (!_svg_init(file)) return -1;
+   if (!read_svg_header(scale_down, dpi, size_w, size_h)) return -1;
+
+   if (head_only != 0)
+     {
+        printf("size %d %d\n", width, height);
+        printf("alpha 1\n");
+        printf("done\n");
+     }
+   else
+     {
+        if (read_svg_data())
+          {
+             printf("size %d %d\n", width, height);
+             printf("alpha 1\n");
+             if (shm_fd >= 0) printf("shmfile %s\n", shmfile);
+             else
+               {
+                  printf("data\n");
+                  fwrite(shm_addr, width * height * sizeof(DATA32), 1, stdout);
+               }
+             shm_free();
+          }
+     }
+   _svg_shutdown();
+   return 0;
+
+}
+