demo(benchmark): rework benchmark

demos/benchmark/lv_demo_benchmark.h

@@ -15,6 +15,12 @@ extern "C" {
  *********************/
 #include "../lv_demos.h"
 
+#if LV_USE_DEMO_BENCHMARK
+
+#if LV_USE_PERF_MONITOR == 0
+#error "lv_demo_benchmark: LV_USE_PERF_MONITOR is required. Enable it in lv_conf.h (LV_USE_PERF_MONITOR 1)"
+#endif
+
 /*********************
  *      DEFINES
  *********************/
@@ -22,39 +28,22 @@ extern "C" {
 /**********************
  *      TYPEDEFS
  **********************/
-typedef enum {
-    /**Render the scenes and show them on the display.
-     * Measure rendering time but it might contain extra time when LVGL waits for the driver.
-     * Run each scenes for a few seconds so the performance can be seen by eye too.
-     * As only the rendering time is measured and converted to FPS, really high values (e.g. 1000 FPS)
-     * are possible.*/
-    LV_DEMO_BENCHMARK_MODE_RENDER_AND_DRIVER,
-
-    /**Similar to RENDER_AND_DRIVER but instead of measuring the rendering time only measure the real FPS of the system.
-     * E.g. even if a scene was rendered in 1 ms, but the screen is redrawn only in every 100 ms, the result will be 10 FPS.*/
-    LV_DEMO_BENCHMARK_MODE_REAL,
-
-    /**Temporarily display the `flush_cb` so the pure rendering time will be measured.
-     * The display is not updated during the benchmark, only at the end when the summary table is shown.
-     * Render a given number of frames from each scene and calculate the FPS from them.*/
-    LV_DEMO_BENCHMARK_MODE_RENDER_ONLY,
-} lv_demo_benchmark_mode_t;
 
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
+
 /** Run all test scenes in the LVGL benchmark with a given mode
  */
-void lv_demo_benchmark(lv_demo_benchmark_mode_t mode);
 
-/** Run a specific test scene in the LVGL benchmark with a given mode
- */
-void lv_demo_benchmark_run_scene(lv_demo_benchmark_mode_t mode, uint16_t scene_no);
+void lv_demo_benchmark(void);
 
 /**********************
  *      MACROS
  **********************/
 
+#endif /*LV_USE_DEMO_BENCHMARK*/
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif