perf(vg_lite): add asynchronous rendering support (#5398)

Signed-off-by: pengyiqiang <pengyiqiang@xiaomi.com>
Signed-off-by: FASTSHIFT <vifextech@foxmail.com>
Co-authored-by: pengyiqiang <pengyiqiang@xiaomi.com>

Kconfig

@@ -367,6 +367,13 @@ menu "LVGL configuration"
 				default n
 				depends on LV_USE_DRAW_VG_LITE
 
+			config LV_VG_LITE_FLUSH_MAX_COUNT
+				int "VG-Lite flush commit trigger threshold."
+				default 8
+				depends on LV_USE_DRAW_VG_LITE
+				help
+					GPU will try to batch these many draw tasks.
+
 			config LV_USE_GPU_SDL
 				bool "Use SDL renderer API"
 				default n

lv_conf_template.h

@@ -176,6 +176,9 @@
 /* Enable VG-Lite assert. */
 #define LV_VG_LITE_USE_ASSERT 0
 
+/* VG-Lite flush commit trigger threshold. GPU will try to batch these many draw tasks. */
+#define LV_VG_LITE_FLUSH_MAX_COUNT 8
+
 #endif
 
 /*=======================

src/draw/vg_lite/lv_draw_vg_lite.c

@@ -68,6 +68,7 @@ void lv_draw_vg_lite_init(void)
     unit->base_unit.dispatch_cb = draw_dispatch;
     unit->base_unit.evaluate_cb = draw_evaluate;
     unit->base_unit.delete_cb = draw_delete;
+    lv_array_init(&unit->img_dsc_pending, 4, sizeof(lv_image_decoder_dsc_t));
 
     lv_vg_lite_path_init(unit);
 
@@ -134,21 +135,15 @@ static void draw_execute(lv_draw_vg_lite_unit_t * u)
             break;
     }
 
-#if LV_USE_PARALLEL_DRAW_DEBUG
+    lv_vg_lite_flush(draw_unit);
-    /* Layers manage it for themselves. */
-    if(t->type != LV_DRAW_TASK_TYPE_LAYER) {
-    }
-#endif
-
-    LV_VG_LITE_CHECK_ERROR(vg_lite_finish());
 }
 
 static int32_t draw_dispatch(lv_draw_unit_t * draw_unit, lv_layer_t * layer)
 {
-    lv_draw_vg_lite_unit_t * draw_vg_lite_unit = (lv_draw_vg_lite_unit_t *)draw_unit;
+    lv_draw_vg_lite_unit_t * u = (lv_draw_vg_lite_unit_t *)draw_unit;
 
     /* Return immediately if it's busy with draw task. */
-    if(draw_vg_lite_unit->task_act) {
+    if(u->task_act) {
         return 0;
     }
 
@@ -157,6 +152,7 @@ static int32_t draw_dispatch(lv_draw_unit_t * draw_unit, lv_layer_t * layer)
 
     /* Return 0 is no selection, some tasks can be supported by other units. */
     if(!t || t->preferred_draw_unit_id != VG_LITE_DRAW_UNIT_ID) {
+        lv_vg_lite_finish(draw_unit);
         return -1;
     }
 
@@ -171,16 +167,16 @@ static int32_t draw_dispatch(lv_draw_unit_t * draw_unit, lv_layer_t * layer)
     }
 
     t->state = LV_DRAW_TASK_STATE_IN_PROGRESS;
-    draw_vg_lite_unit->base_unit.target_layer = layer;
+    u->base_unit.target_layer = layer;
-    draw_vg_lite_unit->base_unit.clip_area = &t->clip_area;
+    u->base_unit.clip_area = &t->clip_area;
-    draw_vg_lite_unit->task_act = t;
+    u->task_act = t;
 
-    draw_execute(draw_vg_lite_unit);
+    draw_execute(u);
 
-    draw_vg_lite_unit->task_act->state = LV_DRAW_TASK_STATE_READY;
+    u->task_act->state = LV_DRAW_TASK_STATE_READY;
-    draw_vg_lite_unit->task_act = NULL;
+    u->task_act = NULL;
 
-    /* The draw unit is free now. Request a new dispatching as it can get a new task. */
+    /*The draw unit is free now. Request a new dispatching as it can get a new task*/
     lv_draw_dispatch_request();
 
     return 1;
@@ -217,6 +213,7 @@ static int32_t draw_evaluate(lv_draw_unit_t * draw_unit, lv_draw_task_t * task)
 static int32_t draw_delete(lv_draw_unit_t * draw_unit)
 {
     lv_draw_vg_lite_unit_t * unit = (lv_draw_vg_lite_unit_t *)draw_unit;
+    lv_array_deinit(&unit->img_dsc_pending);
     lv_vg_lite_path_deinit(unit);
     lv_vg_lite_decoder_deinit();
     return 1;

src/draw/vg_lite/lv_draw_vg_lite_arc.c

@@ -186,7 +186,7 @@ void lv_draw_vg_lite_arc(lv_draw_unit_t * draw_unit, const lv_draw_arc_dsc_t * d
                                        0,
                                        color,
                                        VG_LITE_FILTER_BI_LINEAR));
-            lv_image_decoder_close(&decoder_dsc);
+            lv_vg_lite_push_image_decoder_dsc(draw_unit, &decoder_dsc);
         }
     }
 

src/draw/vg_lite/lv_draw_vg_lite_img.c

@@ -148,7 +148,7 @@ void lv_draw_vg_lite_img(lv_draw_unit_t * draw_unit, const lv_draw_image_dsc_t *
         lv_vg_lite_path_drop(u, path);
     }
 
-    lv_image_decoder_close(&decoder_dsc);
+    lv_vg_lite_push_image_decoder_dsc(draw_unit, &decoder_dsc);
 }
 
 /**********************

src/draw/vg_lite/lv_draw_vg_lite_label.c

@@ -211,7 +211,7 @@ static void draw_letter_bitmap(lv_draw_vg_lite_unit_t * u, const lv_draw_glyph_d
      * You need to wait for the GPU to finish using the buffer before releasing it.
      * Later, use the font cache for management to improve efficiency.
      */
-    LV_VG_LITE_CHECK_ERROR(vg_lite_finish());
+    lv_vg_lite_finish(&u->base_unit);
 }
 
 #if LV_USE_FREETYPE

src/draw/vg_lite/lv_draw_vg_lite_type.h

@@ -19,6 +19,7 @@ extern "C" {
 #if LV_USE_DRAW_VG_LITE
 
 #include "../lv_draw.h"
+#include "../../misc/lv_array.h"
 
 #if LV_USE_VG_LITE_THORVG
 #include "../../others/vg_lite_tvg/vg_lite.h"
@@ -37,6 +38,8 @@ extern "C" {
 struct _lv_draw_vg_lite_unit_t {
     lv_draw_unit_t base_unit;
     lv_draw_task_t * task_act;
+    lv_array_t img_dsc_pending;
+    uint16_t flush_count;
     vg_lite_buffer_t target_buffer;
     vg_lite_matrix_t global_matrix;
     struct _lv_vg_lite_path_t * global_path;

src/draw/vg_lite/lv_draw_vg_lite_vector.c

@@ -153,7 +153,7 @@ static void task_draw_cb(void * ctx, const lv_vector_path_t * path, const lv_vec
                                                recolor,
                                                vg_color,
                                                VG_LITE_FILTER_BI_LINEAR));
-                    lv_image_decoder_close(&decoder_dsc);
+                    lv_vg_lite_push_image_decoder_dsc(&u->base_unit, &decoder_dsc);
                 }
             }
             break;

src/draw/vg_lite/lv_vg_lite_utils.c

@@ -13,6 +13,7 @@
 
 #include "lv_vg_lite_decoder.h"
 #include "lv_vg_lite_path.h"
+#include "lv_draw_vg_lite_type.h"
 #include <string.h>
 
 /*********************
@@ -592,6 +593,29 @@ void lv_vg_lite_image_matrix(vg_lite_matrix_t * matrix, int32_t x, int32_t y, co
     }
 }
 
+void lv_vg_lite_push_image_decoder_dsc(lv_draw_unit_t * draw_unit, lv_image_decoder_dsc_t * img_dsc)
+{
+    lv_draw_vg_lite_unit_t * u = (lv_draw_vg_lite_unit_t *)draw_unit;
+    lv_array_push_back(&u->img_dsc_pending, img_dsc);
+}
+
+void lv_vg_lite_clear_image_decoder_dsc(lv_draw_unit_t * draw_unit)
+{
+    lv_draw_vg_lite_unit_t * u = (lv_draw_vg_lite_unit_t *)draw_unit;
+    lv_array_t * arr = &u->img_dsc_pending;
+    uint32_t size = lv_array_size(arr);
+    if(size == 0) {
+        return;
+    }
+
+    /* Close all pending image decoder dsc */
+    for(uint32_t i = 0; i < size; i++) {
+        lv_image_decoder_dsc_t * img_dsc = lv_array_at(arr, i);
+        lv_image_decoder_close(img_dsc);
+    }
+    lv_array_clear(arr);
+}
+
 bool lv_vg_lite_buffer_open_image(vg_lite_buffer_t * buffer, lv_image_decoder_dsc_t * decoder_dsc, const void * src,
                                   bool no_cache)
 {
@@ -1022,6 +1046,31 @@ void lv_vg_lite_disable_scissor(void)
     vg_lite_disable_scissor();
 }
 
+void lv_vg_lite_flush(lv_draw_unit_t * draw_unit)
+{
+    lv_draw_vg_lite_unit_t * u = (lv_draw_vg_lite_unit_t *)draw_unit;
+
+    u->flush_count++;
+    if(u->flush_count < LV_VG_LITE_FLUSH_MAX_COUNT) {
+        /* Do not flush too often */
+        return;
+    }
+
+    LV_VG_LITE_CHECK_ERROR(vg_lite_flush());
+    u->flush_count = 0;
+}
+
+void lv_vg_lite_finish(lv_draw_unit_t * draw_unit)
+{
+    lv_draw_vg_lite_unit_t * u = (lv_draw_vg_lite_unit_t *)draw_unit;
+
+    LV_VG_LITE_CHECK_ERROR(vg_lite_finish());
+
+    /* Clear image decoder dsc reference */
+    lv_vg_lite_clear_image_decoder_dsc(draw_unit);
+    u->flush_count = 0;
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/

src/draw/vg_lite/lv_vg_lite_utils.h

@@ -124,6 +124,10 @@ void lv_vg_lite_buffer_from_draw_buf(vg_lite_buffer_t * buffer, const lv_draw_bu
 
 void lv_vg_lite_image_matrix(vg_lite_matrix_t * matrix, int32_t x, int32_t y, const lv_draw_image_dsc_t * dsc);
 
+void lv_vg_lite_push_image_decoder_dsc(lv_draw_unit_t * draw_unit, lv_image_decoder_dsc_t * img_dsc);
+
+void lv_vg_lite_clear_image_decoder_dsc(lv_draw_unit_t * draw_unit);
+
 bool lv_vg_lite_buffer_open_image(vg_lite_buffer_t * buffer, lv_image_decoder_dsc_t * decoder_dsc, const void * src,
                                   bool no_cache);
 
@@ -168,6 +172,10 @@ void lv_vg_lite_set_scissor_area(const lv_area_t * area);
 
 void lv_vg_lite_disable_scissor(void);
 
+void lv_vg_lite_flush(lv_draw_unit_t * draw_unit);
+
+void lv_vg_lite_finish(lv_draw_unit_t * draw_unit);
+
 /**********************
  *      MACROS
  **********************/

src/lv_conf_internal.h

@@ -462,6 +462,15 @@
     #endif
 #endif
 
+/* VG-Lite flush commit trigger threshold. GPU will try to batch these many draw tasks. */
+#ifndef LV_VG_LITE_FLUSH_MAX_COUNT
+    #ifdef CONFIG_LV_VG_LITE_FLUSH_MAX_COUNT
+        #define LV_VG_LITE_FLUSH_MAX_COUNT CONFIG_LV_VG_LITE_FLUSH_MAX_COUNT
+    #else
+        #define LV_VG_LITE_FLUSH_MAX_COUNT 8
+    #endif
+#endif
+
 #endif
 
 /*=======================