191 lines
4.8 KiB
C
191 lines
4.8 KiB
C
/**
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* Simple Evas example illustrating some image objects functions
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*
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* You'll need at least one engine built for it (excluding the buffer
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* one) and the png image loader/saver also built. See stdout/stderr
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* for output.
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*
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* @verbatim
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* gcc -o evas-images3 evas-images3.c `pkg-config --libs --cflags evas ecore ecore-evas`
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* @endverbatim
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#else
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#define PACKAGE_EXAMPLES_DIR "."
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#endif
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#include <Ecore.h>
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#include <Ecore_Evas.h>
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#include <stdio.h>
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#include <errno.h>
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#include "evas-common.h"
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#define WIDTH (320)
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#define HEIGHT (240)
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static const char *img_path = PACKAGE_EXAMPLES_DIR EVAS_IMAGE_FOLDER "/enlightenment.png";
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static const char *commands = \
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"commands are:\n"
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"\tw - write new pixel data to image\n"
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"\ti - print image info\n"
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"\ta - save noise image to disk (/tmp dir)\n"
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"\th - print help\n";
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const char *file_path = "/tmp/evas-images2-example.png";
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const char *quality_str = "quality=100";
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struct test_data
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{
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Ecore_Evas *ee;
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Evas *evas;
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Evas_Object *bg;
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Evas_Object *logo, *logo1;
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};
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static struct test_data d = {0};
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static void
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_on_destroy(Ecore_Evas *ee EINA_UNUSED)
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{
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ecore_main_loop_quit();
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}
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/* here just to keep our example's window size and background image's
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* size in synchrony */
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static void
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_canvas_resize_cb(Ecore_Evas *ee)
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{
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int w, h;
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ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
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evas_object_resize(d.bg, w, h);
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evas_object_resize(d.logo, w / 2, h);
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evas_object_move(d.logo1, w / 2, 0);
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evas_object_resize(d.logo1, w / 2, h);
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}
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static void
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_on_keydown(void *data EINA_UNUSED,
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Evas *evas EINA_UNUSED,
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Evas_Object *o EINA_UNUSED,
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void *einfo)
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{
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Evas_Event_Key_Down *ev = einfo;
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if (strcmp(ev->key, "h") == 0) /* print help */
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{
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puts(commands);
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return;
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}
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if (strcmp(ev->key, "i") == 0) /* change proxy's source */
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{
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int stride = evas_object_image_stride_get(d.logo);
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int w, h;
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evas_object_image_size_get(d.logo, &w, &h);
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printf("image size: %dx%d; stride: %d\n", w, h, stride);
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return;
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}
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if (strcmp(ev->key, "w") == 0) /* save noise image to disk */
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{
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int i;
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char *pixels = evas_object_image_data_get(d.logo, EINA_FALSE);
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char *bufpixels;
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int w, h;
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int stride;
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Eina_Bool equal = EINA_TRUE;
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evas_object_image_size_get(d.logo, &w, &h);
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stride = evas_object_image_stride_get(d.logo);
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bufpixels = malloc(sizeof(char) * stride * h);
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memcpy(bufpixels, pixels, sizeof(char) * stride * h);
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pixels = evas_object_image_data_get(d.logo, EINA_TRUE);
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for (i = 0; i < (stride * h); i++)
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{
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if (bufpixels[i] != pixels[i])
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{
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equal = EINA_FALSE;
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break;
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}
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}
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free(bufpixels);
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if (!equal)
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printf("write pixels different from readonly pixels.\n");
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for (i = ((stride * h) / 4) ; i < ((stride * h) / 2) ; i++)
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{
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pixels[i] = 0;
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}
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// evas_object_image_data_set(d.logo, pixels);
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evas_object_image_data_update_add(d.logo, 0, 0, w, h);
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return;
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}
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}
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int
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main(void)
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{
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if (!ecore_evas_init())
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return EXIT_FAILURE;
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/* this will give you a window with an Evas canvas under the first
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* engine available */
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d.ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
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if (!d.ee)
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goto error;
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ecore_evas_callback_destroy_set(d.ee, _on_destroy);
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ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
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ecore_evas_show(d.ee);
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/* the canvas pointer, de facto */
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d.evas = ecore_evas_get(d.ee);
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d.bg = evas_object_rectangle_add(d.evas);
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evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
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evas_object_move(d.bg, 0, 0); /* at canvas' origin */
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evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
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evas_object_show(d.bg);
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evas_object_focus_set(d.bg, EINA_TRUE);
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evas_object_event_callback_add(
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d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
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d.logo = evas_object_image_filled_add(d.evas);
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evas_object_image_file_set(d.logo, img_path, NULL);
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evas_object_resize(d.logo, WIDTH / 2, HEIGHT);
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evas_object_show(d.logo);
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d.logo1 = evas_object_image_filled_add(d.evas);
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evas_object_image_file_set(d.logo1, img_path, NULL);
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evas_object_resize(d.logo1, WIDTH / 2, HEIGHT);
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evas_object_move(d.logo1, WIDTH / 2, 0);
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evas_object_show(d.logo1);
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puts(commands);
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ecore_main_loop_begin();
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ecore_evas_free(d.ee);
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ecore_evas_shutdown();
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return 0;
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error:
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fprintf(stderr, "you got to have at least one evas engine built and linked"
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" up to ecore-evas for this example to run properly.\n");
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ecore_evas_shutdown();
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return -1;
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}
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