evas example: add a png scale down example.

Reviewers: cedric, #committers, zmike

Reviewed By: #committers, zmike

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D8886

src/examples/evas/Makefile.examples

@@ -16,6 +16,7 @@ EXAMPLES= evas-aspect-hints \
           evas-images3 \
           evas-images4 \
           evas-images5 \
+          evas-images6 \
           evas-init-shutdown \
           evas-map-utils \
           evas-object-manipulation \

src/examples/evas/evas-images6.c

@@ -0,0 +1,98 @@
+/**
+ * Example of handling events for image objects in Evas.
+ *
+ * You'll need at least one engine built for it (excluding the buffer
+ * one) and the png image loader/saver also built. See stdout/stderr
+ * for output.
+ *
+ * @verbatim
+ * gcc -o evas-images6 evas-images6.c `pkg-config --libs --cflags evas ecore ecore-evas`
+ * @endverbatim
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#else
+#define PACKAGE_EXAMPLES_DIR "."
+#endif
+
+#include <Ecore.h>
+#include <Ecore_Evas.h>
+#include <stdio.h>
+#include <errno.h>
+#include "evas-common.h"
+
+#define WIDTH  (960)
+#define HEIGHT (540)
+
+static const char *img_path = PACKAGE_EXAMPLES_DIR EVAS_IMAGE_FOLDER "/scale_down.png";
+
+struct test_data
+{
+   Ecore_Evas  *ee;
+   Evas        *evas;
+   Evas_Object *bg, *img;
+};
+
+static struct test_data d = {0};
+
+
+static void
+_on_destroy(Ecore_Evas *ee EINA_UNUSED)
+{
+   ecore_main_loop_quit();
+}
+
+/* Keep the example's window size in sync with the background image's size */
+static void
+_canvas_resize_cb(Ecore_Evas *ee)
+{
+   int w, h;
+
+   ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
+   evas_object_resize(d.bg, w, h);
+}
+
+int
+main(void)
+{
+   if (!ecore_evas_init())
+     return EXIT_FAILURE;
+
+   /* this will give you a window with an Evas canvas under the first
+    * engine available */
+   d.ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
+   if (!d.ee)
+     goto error;
+
+   ecore_evas_callback_destroy_set(d.ee, _on_destroy);
+   ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
+   ecore_evas_show(d.ee);
+
+   /* the canvas pointer, de facto */
+   d.evas = ecore_evas_get(d.ee);
+
+   d.bg = evas_object_rectangle_add(d.evas);
+   evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
+   evas_object_move(d.bg, 0, 0); /* at canvas' origin */
+   evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
+   evas_object_show(d.bg);
+
+   d.img = evas_object_image_filled_add(d.evas);
+   evas_object_image_file_set(d.img, img_path, NULL);
+   evas_object_image_load_scale_down_set(d.img, 2);
+   evas_object_resize(d.img, WIDTH, HEIGHT);
+   evas_object_show(d.img);
+
+   ecore_main_loop_begin();
+
+   ecore_evas_free(d.ee);
+   ecore_evas_shutdown();
+   return 0;
+
+error:
+   fprintf(stderr, "error: Requires at least one Evas engine built and linked"
+                   " to ecore-evas for this example to run properly.\n");
+   ecore_evas_shutdown();
+   return -1;
+}

src/examples/evas/meson.build

@@ -29,6 +29,7 @@ examples = [
   'evas-images3',
   'evas-images4',
   'evas-images5',
+  'evas-images6',
   'evas-images',
   'evas-init-shutdown',
   'evas-map-aa',