efl

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#include <stdio.h>
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#include <Eina.h>
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#include <Ecore.h>
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#include <Ecore_Evas.h>
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#include <Evas.h>
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#include <Ecore_Buffer.h>
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#include <Ecore_Buffer_Queue.h>
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#define WIDTH 720
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#define HEIGHT 960
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struct _Window
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{
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   Evas *e;
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   Ecore_Evas *ee;
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   Evas_Object *bg, *img;
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   Ecore_Buffer *buffer;
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};
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struct _Window win;
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Eina_List *hdls;
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static void
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paint_pixels(void *image, int padding, int width, int height, uint32_t time)
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{
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   const int halfh = padding + (height - padding * 2) / 2;
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   const int halfw = padding + (width  - padding * 2) / 2;
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   int ir, or;
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   uint32_t *pixel = image;
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   int y;
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   /* squared radii thresholds */
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   or = (halfw < halfh ? halfw : halfh) - 8;
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   ir = or - 32;
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   or *= or;
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   ir *= ir;
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   pixel += padding * width;
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   for (y = padding; y < height - padding; y++) {
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        int x;
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        int y2 = (y - halfh) * (y - halfh);
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        pixel += padding;
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        for (x = padding; x < width - padding; x++) {
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             uint32_t v;
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             /* squared distance from center */
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             int r2 = (x - halfw) * (x - halfw) + y2;
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             if (r2 < ir)
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               v = (r2 / 32 + time / 64) * 0x0080401;
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             else if (r2 < or)
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               v = (y + time / 32) * 0x0080401;
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             else
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               v = (x + time / 16) * 0x0080401;
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             v &= 0x00ffffff;
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             v |= 0xff000000;
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             *pixel++ = v;
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        }
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        pixel += padding;
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   }
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}
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static void
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_cb_post_render(Ecore_Evas *ee EINA_UNUSED)
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{
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   void *data;
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   // Get pixel data and update.
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   data = ecore_buffer_data_get(win.buffer);
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   paint_pixels(data, 0, WIDTH, HEIGHT, ecore_loop_time_get() * 1000);
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   evas_object_image_data_set(win.img, data);
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   evas_object_image_data_update_add(win.img, 0, 0, WIDTH, HEIGHT);
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}
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int
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main(void)
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{
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   Evas_Object *o;
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   void *data;
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   eina_init();
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   ecore_init();
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   ecore_evas_init();
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   ecore_buffer_init();
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   win.ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
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   win.e = ecore_evas_get(win.ee);
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   o = evas_object_rectangle_add(win.e);
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   evas_object_move(o, 0, 0);
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   evas_object_resize(o, WIDTH, HEIGHT);
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   evas_object_color_set(o, 255, 0, 0, 255);
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   evas_object_show(o);
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   win.bg = o;
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   o = evas_object_image_add(win.e);
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   evas_object_image_fill_set(o, 0, 0, WIDTH, HEIGHT);
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   evas_object_image_size_set(o, WIDTH, HEIGHT);
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   evas_object_move(o, 0, 0);
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   evas_object_resize(o, WIDTH, HEIGHT);
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   evas_object_show(o);
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   win.img = o;
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   // Create buffer and drawing.
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   win.buffer = ecore_buffer_new("shm", WIDTH, HEIGHT, 0, 0);
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   data = ecore_buffer_data_get(win.buffer);
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   paint_pixels(data, 0, WIDTH, HEIGHT, 0);
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   evas_object_image_data_set(win.img, data);
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   evas_object_image_data_update_add(win.img, 0, 0, WIDTH, HEIGHT);
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   ecore_evas_show(win.ee);
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   ecore_evas_callback_post_render_set(win.ee, _cb_post_render);
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   ecore_main_loop_begin();
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   ecore_buffer_free(win.buffer);
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   ecore_buffer_shutdown();
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   ecore_evas_shutdown();
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   ecore_shutdown();
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   eina_shutdown();
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   return 0;
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}
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