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/**
* Simple Evas example illustrating some image objects functions
*
* 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-images2 evas-images2.c `pkg-config --libs --cflags evas ecore ecore-evas`
* @endverbatim
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define PACKAGE_EXAMPLES_DIR "."
#define __UNUSED__
#endif
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <stdio.h>
#include <errno.h>
#define WIDTH (320)
#define HEIGHT (240)
static const char *img_path = PACKAGE_EXAMPLES_DIR "/enlightenment.png";
static const char *commands = \
"commands are:\n"
"\tp - change proxy image's source\n"
"\ts - print noise image's stride value\n"
"\ta - save noise image to disk (/tmp dir)\n"
"\th - print help\n";
const char *file_path = "/tmp/evas-images2-example.png";
const char *quality_str = "quality=100";
struct test_data
{
Ecore_Evas *ee;
Evas *evas;
Evas_Object *logo, *noise_img, *proxy_img, *bg;
};
static struct test_data d = {0};
static void
_on_preloaded(void *data __UNUSED__,
Evas *e __UNUSED__,
Evas_Object *obj __UNUSED__,
void *event_info __UNUSED__)
{
fprintf(stdout, "Image has been pre-loaded!\n");
}
static void
_on_destroy(Ecore_Evas *ee __UNUSED__)
{
ecore_main_loop_quit();
}
/* here just to keep our example's window size and background image's
* size in synchrony */
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);
}
static void
_on_keydown(void *data __UNUSED__,
Evas *evas __UNUSED__,
Evas_Object *o __UNUSED__,
void *einfo)
{
Evas_Event_Key_Down *ev = einfo;
if (strcmp(ev->keyname, "h") == 0) /* print help */
{
fprintf(stdout, commands);
return;
}
if (strcmp(ev->keyname, "s") == 0) /* print proxy image' stride value */
{
int stride = evas_object_image_stride_get(d.noise_img);
fprintf(stdout, "Image has row stride value of %d, which accounts"
" for %d pixels\n", stride, stride / 4);
return;
}
if (strcmp(ev->keyname, "p") == 0) /* change proxy's source */
{
Evas_Object *source = evas_object_image_source_get(d.proxy_img);
if (source == d.logo) source = d.noise_img;
else source = d.logo;
evas_object_image_source_set(d.proxy_img, source);
fprintf(stdout, "Proxy image's source changed\n");
return;
}
if (strcmp(ev->keyname, "a") == 0) /* save noise image to disk */
{
if (!evas_object_image_save(d.noise_img, file_path, NULL, quality_str))
fprintf(stderr, "Cannot save image to '%s' (flags '%s')\n",
file_path, quality_str);
else
fprintf(stdout, "Image saved to '%s' (flags '%s'), check it out with "
"an image viewer\n", file_path, quality_str);
return;
}
}
int
main(void)
{
unsigned int i;
unsigned int pixels[(WIDTH / 4) * (HEIGHT / 4)];
srand(time(NULL));
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);
evas_object_focus_set(d.bg, EINA_TRUE);
evas_object_event_callback_add(
d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
d.logo = evas_object_image_filled_add(d.evas);
evas_object_event_callback_add(
d.logo, EVAS_CALLBACK_IMAGE_PRELOADED, _on_preloaded, NULL);
evas_object_image_preload(d.logo, EINA_TRUE);
evas_object_image_file_set(d.logo, img_path, NULL);
evas_object_resize(d.logo, WIDTH / 2, HEIGHT / 2);
evas_object_show(d.logo);
/* creating noise image */
for (i = 0; i < sizeof(pixels) / sizeof(pixels[0]); i++)
pixels[i] = rand();
d.noise_img = evas_object_image_add(d.evas);
evas_object_image_size_set(d.noise_img, WIDTH / 4, HEIGHT / 4);
evas_object_image_data_set(d.noise_img, pixels);
evas_object_image_filled_set(d.noise_img, EINA_TRUE);
evas_object_move(d.noise_img, (WIDTH * 3) / 4, 0);
evas_object_resize(d.noise_img, WIDTH / 4, HEIGHT / 4);
evas_object_show(d.noise_img);
fprintf(stdout, "Creating noise image with size %d, %d\n",
WIDTH / 4, HEIGHT / 4);
d.proxy_img = evas_object_image_filled_add(d.evas);
evas_object_image_source_set(d.proxy_img, d.logo);
evas_object_move(d.proxy_img, WIDTH / 4, HEIGHT / 2);
evas_object_resize(d.proxy_img, WIDTH / 2, HEIGHT / 2);
evas_object_show(d.proxy_img);
fprintf(stdout, commands);
ecore_main_loop_begin();
ecore_evas_free(d.ee);
ecore_evas_shutdown();
return 0;
error:
fprintf(stderr, "you got to have at least one evas engine built and linked"
" up to ecore-evas for this example to run properly.\n");
ecore_evas_shutdown();
return -1;
}
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