122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
/**
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* Simple Ecore_Evas example on the Evas buffer engine wrapper
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* functions.
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*
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* You must have Evas compiled with the buffer engine.
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*
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* Compile with:
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*
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* @verbatim
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* gcc -o ecore_evas_buffer_example_01 ecore_evas_buffer_example_01.c `pkg-config --libs --cflags evas ecore-evas evas-software-buffer`
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* @endverbatim
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*
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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 EINA_UNUSED
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#endif
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#include <Ecore_Evas.h>
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#include <stdio.h>
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#define WIDTH (320)
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#define HEIGHT (240)
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static Ecore_Evas *ee;
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/* support function to save scene as PPM image */
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static void
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_scene_save(Evas *canvas,
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const char *dest)
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{
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const unsigned int *pixels, *pixels_end;
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int width, height;
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FILE *f;
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evas_output_size_get(canvas, &width, &height);
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f = fopen(dest, "wb+");
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if (!f)
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{
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fprintf(stderr, "ERROR: could not open for writing '%s': %s\n",
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dest, strerror(errno));
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return;
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}
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pixels = ecore_evas_buffer_pixels_get(ee);
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pixels_end = pixels + (width * height);
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/* PPM P6 format is dead simple to write: */
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fprintf(f, "P6\n%d %d\n255\n", width, height);
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for (; pixels < pixels_end; pixels++)
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{
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int r, g, b;
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r = ((*pixels) & 0xff0000) >> 16;
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g = ((*pixels) & 0x00ff00) >> 8;
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b = (*pixels) & 0x0000ff;
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fprintf(f, "%c%c%c", r, g, b);
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}
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fclose(f);
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printf("Saved scene as '%s'\n", dest);
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}
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int
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main(void)
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{
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Evas *canvas;
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Evas_Object *bg, *r1, *r2, *r3;
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ecore_evas_init();
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ee = ecore_evas_buffer_new(WIDTH, HEIGHT);
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if (!ee) goto error;
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canvas = ecore_evas_get(ee);
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bg = evas_object_rectangle_add(canvas);
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evas_object_color_set(bg, 255, 255, 255, 255); /* white bg */
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evas_object_move(bg, 0, 0); /* at origin */
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evas_object_resize(bg, WIDTH, HEIGHT); /* covers full canvas */
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evas_object_show(bg);
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r1 = evas_object_rectangle_add(canvas);
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evas_object_color_set(r1, 255, 0, 0, 255); /* 100% opaque red */
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evas_object_move(r1, 10, 10);
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evas_object_resize(r1, 100, 100);
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evas_object_show(r1);
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r2 = evas_object_rectangle_add(canvas);
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evas_object_color_set(r2, 0, 128, 0, 128); /* 50% opaque green */
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evas_object_move(r2, 10, 10);
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evas_object_resize(r2, 50, 50);
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evas_object_show(r2);
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r3 = evas_object_rectangle_add(canvas);
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evas_object_color_set(r3, 0, 128, 0, 255); /* 100% opaque dark green */
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evas_object_move(r3, 60, 60);
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evas_object_resize(r3, 50, 50);
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evas_object_show(r3);
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ecore_evas_manual_render(ee);
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_scene_save(canvas, "/tmp/evas-buffer-simple-render.ppm");
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ecore_evas_free(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, "error: Requires at least one Evas engine built"
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" and linked to ecore-evas for this example to run"
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" properly.\n");
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ecore_evas_shutdown();
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return -1;
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}
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