Ephoto: Add Sobel Edge Detection Filter.
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@ -149,6 +149,7 @@ void ephoto_filter_cartoon(Evas_Object *main, Evas_Object *image);
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void ephoto_filter_posterize(Evas_Object *main, Evas_Object *image);
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void ephoto_filter_sketch(Evas_Object *main, Evas_Object *image);
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void ephoto_filter_invert(Evas_Object *main, Evas_Object *image);
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void ephoto_filter_edge(Evas_Object *main, Evas_Object *image);
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void ephoto_filter_histogram_eq(Evas_Object *main, Evas_Object *image);
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/*file functions*/
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@ -13,7 +13,8 @@ enum _Ephoto_Image_Filter
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EPHOTO_IMAGE_FILTER_POSTERIZE,
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EPHOTO_IMAGE_FILTER_SEPIA,
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EPHOTO_IMAGE_FILTER_SHARPEN,
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EPHOTO_IMAGE_FILTER_SKETCH
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EPHOTO_IMAGE_FILTER_SKETCH,
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EPHOTO_IMAGE_FILTER_SOBEL
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};
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struct _Ephoto_Filter
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@ -45,6 +46,7 @@ static Eina_Bool _sepia(void *data);
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static Eina_Bool _negative(void *data);
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static Eina_Bool _posterize(void *data);
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static Eina_Bool _dodge(void *data);
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static Eina_Bool _sobel(void *data);
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static Eina_Bool _histogram_eq(void *data);
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static Ephoto_Filter *
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@ -511,7 +513,6 @@ _posterize(void *data)
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return EINA_TRUE;
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}
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}
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_idler_finishing_cb(ef, EINA_FALSE);
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return EINA_FALSE;
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@ -609,6 +610,69 @@ _dodge(void *data)
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return EINA_FALSE;
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}
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static Eina_Bool
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_sobel(void *data)
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{
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Ephoto_Filter *ef = data;
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Evas_Coord x, y, w, h;
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int i, j, passes = 0;
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unsigned int *p;
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float sobx[3][3] = {{-1, 0, 1},
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{-2, 0, 2},
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{-1, 0, 1}};
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float soby[3][3] = {{-1, -2, -1},
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{0, 0, 0},
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{1, 2, 1}};
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w = ef->w;
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h = ef->h;
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for (y = ef->pos; y < h; y++)
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{
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p = ef->im_data_new + (y * w);
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for (x = 0; x < w; x++)
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{
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int pval = 0, a, r, g, b;
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double hpval = 0.0, vpval = 0.0;
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if (y > 0 && x > 0 && y < (h - 2) && x < (w - 2))
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{
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for (i = -1; i <= 1; i++)
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{
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for (j = -1; j <= 1; j++)
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{
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int index, pix;
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index = (y + i) * w + x + j;
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pix = ef->im_data[index];
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hpval += pix * sobx[i+1][j+1];
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vpval += pix * soby[i+1][j+1];
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}
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}
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}
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pval = abs(hpval) + abs(vpval);
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*p = pval;
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b = (int) ((*p) & 0xff);
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g = (int) ((*p >> 8) & 0xff);
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r = (int) ((*p >> 16) & 0xff);
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a = (int) ((*p >> 24) & 0xff);
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b = _normalize_color(b);
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g = _normalize_color(g);
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r = _normalize_color(r);
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a = _normalize_color(a);
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*p = (a << 24) | (r << 16) | (g << 8) | b;
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p++;
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}
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passes++;
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if (passes == 500)
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{
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ef->pos = y++;
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return EINA_TRUE;
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}
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}
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_idler_finishing_cb(ef, EINA_FALSE);
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return EINA_FALSE;
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}
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static Eina_Bool
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_histogram_eq(void *data)
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{
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@ -760,7 +824,7 @@ ephoto_filter_cartoon(Evas_Object *main, Evas_Object *image)
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Ephoto_Filter *ef = _initialize_filter(EPHOTO_IMAGE_FILTER_CARTOON,
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main, image);
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ef->rad = 5;
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ef->rad = 9;
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ef->drad = 5.0;
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ef->qpos = 0;
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ef->qcount = 1;
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@ -793,6 +857,20 @@ void ephoto_filter_sketch(Evas_Object *main, Evas_Object *image)
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ef->idler = ecore_idler_add(_grayscale, ef);
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}
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void ephoto_filter_edge(Evas_Object *main, Evas_Object *image)
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{
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Ephoto_Filter *ef = _initialize_filter(EPHOTO_IMAGE_FILTER_SOBEL,
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main, image);
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ef->rad = 3;
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ef->qpos = 0;
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ef->qcount = 2;
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ef->queue = eina_list_append(ef->queue, _grayscale);
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ef->queue = eina_list_append(ef->queue, _sobel);
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ef->popup = _processing(main);
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ef->idler = ecore_idler_add(_blur, ef);
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}
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void
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ephoto_filter_histogram_eq(Evas_Object *main, Evas_Object *image)
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{
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@ -1226,6 +1226,21 @@ _go_sketch(void *data, Evas_Object *obj EINA_UNUSED,
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}
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}
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static void
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_go_edge(void *data, Evas_Object *obj EINA_UNUSED,
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void *event_info EINA_UNUSED)
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{
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Ephoto_Single_Browser *sb = data;
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if (sb->viewer)
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{
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sb->editing = EINA_TRUE;
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Ephoto_Viewer *v = evas_object_data_get(sb->viewer, "viewer");
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ephoto_filter_edge(sb->main, v->image);
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}
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}
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static void
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_image_changed(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED,
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void *event_info EINA_UNUSED)
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@ -1471,6 +1486,8 @@ _add_edit_menu_items(Ephoto_Single_Browser *sb, Evas_Object *menu)
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elm_menu_item_add(menu, menu_itt, "insert-image", _("Blur"), _go_blur, sb);
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elm_menu_item_add(menu, menu_itt, "insert-image", _("Cartoon"),
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_go_cartoon, sb);
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elm_menu_item_add(menu, menu_itt, "insert-image", _("Edge Detect"),
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_go_edge, sb);
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elm_menu_item_add(menu, menu_itt, "insert-image", _("Invert Colors"),
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_go_invert, sb);
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elm_menu_item_add(menu, menu_itt, "insert-image", _("Old Photo"),
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