[els scroller] add debug code to measure smoothness of scroller
it count standard deviation of scroll velocity and modify smooth algorithm SVN revision: 73388
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@ -13,6 +13,7 @@ group "Elm_Config" struct {
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value "zoom_friction" double: 0.5;
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value "thumbscroll_border_friction" double: 0.5;
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value "thumbscroll_sensitivity_friction" double: 0.25;
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value "scroll_smooth_time_interval" double: 0.0;
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value "scroll_smooth_amount" double: 0.0;
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value "scroll_smooth_history_weight" double: 0.1;
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value "scroll_smooth_future_time" double: 0.0;
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@ -13,6 +13,7 @@ group "Elm_Config" struct {
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value "zoom_friction" double: 0.5;
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value "thumbscroll_border_friction" double: 0.5;
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value "thumbscroll_sensitivity_friction" double: 0.25;
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value "scroll_smooth_time_interval" double: 0;
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value "scroll_smooth_amount" double: 1.0;
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value "scroll_smooth_history_weight" double: 0.1;
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value "scroll_smooth_future_time" double: 0.0;
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@ -13,6 +13,7 @@ group "Elm_Config" struct {
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value "zoom_friction" double: 0.5;
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value "thumbscroll_border_friction" double: 0.5;
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value "thumbscroll_sensitivity_friction" double: 0.25;
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value "scroll_smooth_time_interval" double: 0.0;
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value "scroll_smooth_amount" double: 0.0;
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value "scroll_smooth_history_weight" double: 0.1;
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value "scroll_smooth_future_time" double: 0.0;
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@ -333,6 +333,7 @@ _desc_init(void)
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ELM_CONFIG_VAL(D, T, bring_in_scroll_friction, T_DOUBLE);
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ELM_CONFIG_VAL(D, T, zoom_friction, T_DOUBLE);
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ELM_CONFIG_VAL(D, T, thumbscroll_bounce_enable, T_UCHAR);
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ELM_CONFIG_VAL(D, T, scroll_smooth_time_interval, T_DOUBLE);
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ELM_CONFIG_VAL(D, T, scroll_smooth_amount, T_DOUBLE);
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ELM_CONFIG_VAL(D, T, scroll_smooth_history_weight, T_DOUBLE);
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ELM_CONFIG_VAL(D, T, scroll_smooth_future_time, T_DOUBLE);
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@ -1002,6 +1003,7 @@ _config_load(void)
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_elm_config->zoom_friction = 0.5;
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_elm_config->thumbscroll_border_friction = 0.5;
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_elm_config->thumbscroll_sensitivity_friction = 0.25; // magic number! just trial and error shows this makes it behave "nicer" and not run off at high speed all the time
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_elm_config->scroll_smooth_time_interval = 0.008;
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_elm_config->scroll_smooth_amount = 1.0;
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_elm_config->scroll_smooth_history_weight = 0.3;
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_elm_config->scroll_smooth_future_time = 0.0;
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@ -1408,6 +1410,8 @@ _env_get(void)
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_elm_config->thumbscroll_sensitivity_friction = friction;
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}
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s = getenv("ELM_SCROLL_SMOOTH_TIME_INTERVAL");
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if (s) _elm_config->scroll_smooth_time_interval = atof(s);
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s = getenv("ELM_SCROLL_SMOOTH_AMOUNT");
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if (s) _elm_config->scroll_smooth_amount = _elm_atof(s);
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s = getenv("ELM_SCROLL_SMOOTH_HISTORY_WEIGHT");
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@ -136,6 +136,7 @@ struct _Elm_Config
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unsigned char thumbscroll_bounce_enable;
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double thumbscroll_border_friction;
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double thumbscroll_sensitivity_friction;
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double scroll_smooth_time_interval;
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double scroll_smooth_amount;
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double scroll_smooth_history_weight;
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double scroll_smooth_future_time;
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@ -11,6 +11,151 @@ typedef struct _Smart_Data Smart_Data;
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#define EVTIME 1
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//#define SCROLLDBG 1
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/* smoothness debug calls - for debugging how much smooth your app is */
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#define SMOOTHDBG 1
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#ifdef SMOOTHDBG
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#define SMOOTH_DEBUG_COUNT 100
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#define FPS 1/60
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typedef struct _smooth_debug_info smooth_debug_info;
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struct _smooth_debug_info
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{
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double t;
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double dt;
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Evas_Coord pos;
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Evas_Coord dpos;
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double vpos;
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};
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static smooth_debug_info smooth_x_history[SMOOTH_DEBUG_COUNT];
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static smooth_debug_info smooth_y_history[SMOOTH_DEBUG_COUNT];
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static int smooth_info_x_count = 0;
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static int smooth_info_y_count = 0;
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static double start_time = 0;
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static int _els_scroller_smooth_debug = 0;
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void
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_els_scroller_smooth_debug_init(void)
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{
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start_time = ecore_time_get();
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smooth_info_x_count = 0;
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smooth_info_y_count = 0;
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memset(&(smooth_x_history[0]), 0, sizeof(smooth_x_history[0]) * SMOOTH_DEBUG_COUNT);
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memset(&(smooth_y_history[0]), 0, sizeof(smooth_y_history[0]) * SMOOTH_DEBUG_COUNT);
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return;
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}
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void
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_els_scroller_smooth_debug_shutdown(void)
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{
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int i = 0;
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int info_x_count = 0;
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int info_y_count = 0;
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double x_ave = 0, y_ave = 0;
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double x_sum = 0, y_sum = 0;
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double x_dev = 0, y_dev = 0;
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double x_dev_sum = 0, y_dev_sum = 0;
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if (smooth_info_x_count >= SMOOTH_DEBUG_COUNT)
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info_x_count = SMOOTH_DEBUG_COUNT;
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else
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info_x_count = smooth_info_x_count;
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if (smooth_info_y_count >= SMOOTH_DEBUG_COUNT)
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info_y_count = SMOOTH_DEBUG_COUNT;
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else
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info_y_count = smooth_info_y_count;
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printf("\n\n<<< X-axis Smoothness >>>\n");
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printf("| Num | t(time) | dt | x | dx |vx(dx/1fps) |\n");
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for (i = info_x_count -1; i >= 0; i--)
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{
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printf("| %4d | %1.6f | %1.6f | %4d | %4d | %9.3f |\n",info_x_count - i,
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smooth_x_history[i].t,
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smooth_x_history[i].dt,
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smooth_x_history[i].pos,
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smooth_x_history[i].dpos,
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smooth_x_history[i].vpos);
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if (i == info_x_count -1) continue;
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x_sum += smooth_x_history[i].vpos;
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}
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x_ave = x_sum / (info_x_count - 1);
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for (i = 0; i < info_x_count -1; i++)
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{
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x_dev_sum += (smooth_x_history[i].vpos - x_ave) * (smooth_x_history[i].vpos - x_ave);
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}
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x_dev = x_dev_sum / (info_x_count -1);
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printf(" Standard deviation of X-axid velocity: %9.3f\n", sqrt(x_dev));
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printf("\n\n<<< Y-axis Smoothness >>>\n");
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printf("| Num | t(time) | dt | y | dy |vy(dy/1fps) |\n");
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for (i = info_y_count -1; i >= 0; i--)
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{
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printf("| %4d | %1.6f | %1.6f | %4d | %4d | %9.3f |\n", info_y_count - i,
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smooth_y_history[i].t,
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smooth_y_history[i].dt,
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smooth_y_history[i].pos,
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smooth_y_history[i].dpos,
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smooth_y_history[i].vpos);
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if (i == info_y_count -1) continue;
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y_sum += smooth_y_history[i].vpos;
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}
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y_ave = y_sum / (info_y_count - 1);
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for (i = 0; i < info_y_count -1; i++)
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{
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y_dev_sum += (smooth_y_history[i].vpos - y_ave) * (smooth_y_history[i].vpos - y_ave);
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}
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y_dev = y_dev_sum / (info_y_count -1);
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printf(" Standard deviation of Y-axid velocity: %9.3f\n", sqrt(y_dev));
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}
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void
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_els_scroller_smooth_debug_movetime_add(int x, int y)
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{
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double tim = 0;
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static int bx = 0;
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static int by = 0;
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tim = ecore_time_get();
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if (bx != x)
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{
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smooth_info_x_count++;
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memmove(&(smooth_x_history[1]), &(smooth_x_history[0]), sizeof(smooth_x_history[0]) * (SMOOTH_DEBUG_COUNT - 1));
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smooth_x_history[0].t = tim - start_time;
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smooth_x_history[0].dt = smooth_x_history[0].t - smooth_x_history[1].t;
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smooth_x_history[0].pos = x;
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smooth_x_history[0].dpos = smooth_x_history[0].pos - smooth_x_history[1].pos;
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if (smooth_x_history[0].dpos >= 0)
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smooth_x_history[0].vpos = (double)(smooth_x_history[0].dpos) / smooth_x_history[0].dt * FPS;
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else
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smooth_x_history[0].vpos = -((double)(smooth_x_history[0].dpos) / smooth_x_history[0].dt * FPS);
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}
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if (by != y)
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{
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smooth_info_y_count++;
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memmove(&(smooth_y_history[1]), &(smooth_y_history[0]), sizeof(smooth_y_history[0]) * (SMOOTH_DEBUG_COUNT - 1));
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smooth_y_history[0].t = tim - start_time;
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smooth_y_history[0].dt = smooth_y_history[0].t - smooth_y_history[1].t;
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smooth_y_history[0].pos = y;
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smooth_y_history[0].dpos = smooth_y_history[0].pos - smooth_y_history[1].pos;
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if (smooth_y_history[0].dpos >= 0)
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smooth_y_history[0].vpos = (double)(smooth_y_history[0].dpos) / smooth_y_history[0].dt * FPS;
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else
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smooth_y_history[0].vpos = -((double)(smooth_y_history[0].dpos) / smooth_y_history[0].dt * FPS);
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}
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bx = x;
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by = y;
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}
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#endif
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struct _Smart_Data
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{
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Evas_Coord x, y, w, h;
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@ -1719,6 +1864,12 @@ _smart_event_mouse_down(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSE
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sd = data;
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ev = event_info;
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#ifdef SMOOTHDBG
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if (getenv("ELS_SCROLLER_SMOOTH_DEBUG")) _els_scroller_smooth_debug = 1;
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if (_els_scroller_smooth_debug) _els_scroller_smooth_debug_init();
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#endif
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// if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
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if (_elm_config->thumbscroll_enable)
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{
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@ -1860,83 +2011,71 @@ _smart_hold_animator(void *data)
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fx = sd->down.hold_x;
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fy = sd->down.hold_y;
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if (_elm_config->scroll_smooth_amount > 0.0)
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{
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int i, count = 0;
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Evas_Coord basex = 0, basey = 0, x, y;
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double dt, t, tdiff, tnow, twin;
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struct
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{
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Evas_Coord x, y, dx, dy;
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double t, dt;
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} pos[60];
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if ((!sd->hold) && (!sd->freeze) && (_elm_config->scroll_smooth_time_interval > 0.0))
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{
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int i, count = 0; //count for the real event number we have to deal with
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int queue_size = 10; //for event queue size
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int src_index = 0, dst_index = 0;
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int xsum = 0, ysum = 0;
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Evas_Coord x = 0, y = 0;
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struct {
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Evas_Coord x, y;
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double t;
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} pos[queue_size];
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double tdiff, tnow;
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double time_interval = _elm_config->scroll_smooth_time_interval;
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// FIXME: assume server and client have the same "timezone"
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// (0 timepoint) for now. this needs to be figured out in advance
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// though.
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tdiff = sd->down.hist.est_timestamp_diff;
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tnow = ecore_time_get() - tdiff;
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t = tnow;
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twin = _elm_config->scroll_smooth_time_window;
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for (i = 0; i < 60; i++)
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for(i = 0; i < queue_size; i++)
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{
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// oldest point is sd->down.history[i]
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// newset is sd->down.history[0]
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dt = t - sd->down.history[i].timestamp;
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if (dt > twin)
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{
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i--;
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break;
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}
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x = sd->down.history[i].x;
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y = sd->down.history[i].y;
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//if there is no history value , we don't deal with it
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//if there is better wat to know existance of history value , I will modify this code to it
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if ( (x == 0) && (y == 0) )
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{
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break;
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}
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_down_coord_eval(sd, &x, &y);
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pos[i].x = x;
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pos[i].y = y;
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pos[i].t = tnow - sd->down.history[i].timestamp;
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}
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count = --i;
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// we only deal with smooth scroll there is enough history
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for(i = 0; i < queue_size; i++)
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{
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if (src_index > count) break;
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if (i == 0)
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{
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basex = x;
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basey = y;
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xsum = pos[i].x;
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ysum = pos[i].y;
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dst_index++;
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continue;
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}
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pos[i].x = x - basex;
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pos[i].y = y - basey;
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pos[i].t =
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sd->down.history[i].timestamp - sd->down.history[0].timestamp;
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count++;
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}
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count = i;
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if (count >= 2)
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while ((pos[src_index].t < time_interval * i) && (src_index <= count))
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{
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double dtsum = 0.0, tadd, maxdt;
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double dxsum = 0.0, dysum = 0.0, xsum = 0.0, ysum = 0.0;
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for (i = 0; i < (count - 1); i++)
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src_index++;
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}
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if (src_index <= count)
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{
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pos[i].dx = pos[i].x - pos[i + 1].x;
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pos[i].dy = pos[i].y - pos[i + 1].y;
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pos[i].dt = pos[i].t - pos[i + 1].t;
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dxsum += pos[i].dx;
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dysum += pos[i].dy;
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dtsum += pos[i].dt;
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xsum += pos[i].x;
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ysum += pos[i].y;
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xsum += pos[src_index].x;
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ysum += pos[src_index].y;
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dst_index++;
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}
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maxdt = pos[i].t;
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dxsum /= (double)i;
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dysum /= (double)i;
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dtsum /= (double)i;
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xsum /= (double)i;
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ysum /= (double)i;
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tadd = tnow - sd->down.history[0].timestamp + _elm_config->scroll_smooth_future_time;
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tadd = tadd - (maxdt / 2);
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#define WEIGHT(n, o, v) n = (((double)o * (1.0 - v)) + ((double)n * v))
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WEIGHT(tadd, sd->down.hist.tadd, _elm_config->scroll_smooth_history_weight);
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WEIGHT(dxsum, sd->down.hist.dxsum, _elm_config->scroll_smooth_history_weight);
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WEIGHT(dysum, sd->down.hist.dysum, _elm_config->scroll_smooth_history_weight);
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fx = basex + xsum + ((dxsum * tadd) / dtsum);
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fy = basey + ysum + ((dysum * tadd) / dtsum);
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sd->down.hist.tadd = tadd;
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sd->down.hist.dxsum = dxsum;
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sd->down.hist.dysum = dysum;
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WEIGHT(fx, sd->down.hold_x, _elm_config->scroll_smooth_amount);
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WEIGHT(fy, sd->down.hold_y, _elm_config->scroll_smooth_amount);
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}
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// printf("%3.5f %i %i\n", ecore_time_get(), sd->down.hold_y, fy);
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fx = xsum / dst_index;
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fy = ysum / dst_index;
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}
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elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
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@ -1953,6 +2092,11 @@ _smart_hold_animator(void *data)
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oy = fy;
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}
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#ifdef SMOOTHDBG
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if (_els_scroller_smooth_debug)
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_els_scroller_smooth_debug_movetime_add(ox, oy);
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#endif
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elm_smart_scroller_child_pos_set(sd->smart_obj, ox, oy);
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return ECORE_CALLBACK_RENEW;
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}
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@ -1979,6 +2123,10 @@ _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *ev
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Smart_Data *sd;
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Evas_Coord x = 0, y = 0, ox = 0, oy = 0;
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#ifdef SMOOTHDBG
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if (_els_scroller_smooth_debug) _els_scroller_smooth_debug_shutdown();
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#endif
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sd = data;
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ev = event_info;
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sd->down.hold_parent = EINA_FALSE;
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