feat(draw): add draw thread stack size config option (#5910)

Signed-off-by: lijianjun <lijianjun@xiaomi.com>
Signed-off-by: Neo Xu <neo.xu1990@gmail.com>
Co-authored-by: lijianjun <lijianjun@xiaomi.com>
Co-authored-by: Neo Xu <neo.xu1990@gmail.com>

Kconfig

@@ -197,6 +197,11 @@ menu "LVGL configuration"
 				> 1 requires an operating system enabled in `LV_USE_OS`
 				> 1 means multiply threads will render the screen in parallel
 
+		config LV_DRAW_THREAD_STACKSIZE
+			int "stack size of draw thread in byte"
+			default 32768
+			depends on LV_USE_OS > 0
+			
 		config LV_USE_DRAW_ARM2D_SYNC
 			bool "Enable Arm's 2D image processing library (Arm-2D) for all Cortex-M processors"
 			default n

lv_conf_template.h

@@ -150,6 +150,9 @@
     #endif
 #endif
 
+/* Set stack size of drawing thread. Unit is byte. If Thorvg is enabled, 128kB is required tested on simulator.*/
+#define LV_DRAW_THREAD_STACKSIZE 32768
+
 /* Use NXP's VG-Lite GPU on iMX RTxxx platforms. */
 #define LV_USE_DRAW_VGLITE 0
 

src/draw/sw/lv_draw_sw.c

@@ -143,7 +143,7 @@ void lv_draw_sw_init(void)
         draw_sw_unit->base_unit.delete_cb = LV_USE_OS ? lv_draw_sw_delete : NULL;
 
 #if LV_USE_OS
-        lv_thread_init(&draw_sw_unit->thread, LV_THREAD_PRIO_HIGH, render_thread_cb, 8 * 1024, draw_sw_unit);
+        lv_thread_init(&draw_sw_unit->thread, LV_THREAD_PRIO_HIGH, render_thread_cb, LV_DRAW_THREAD_STACKSIZE, draw_sw_unit);
 #endif
     }
 

src/lv_conf_internal.h

@@ -408,6 +408,15 @@
     #endif
 #endif
 
+/* Set stack size of drawing thread. Unit is byte. If Thorvg is enabled, 128kB is required tested on simulator.*/
+#ifndef LV_DRAW_THREAD_STACKSIZE
+    #ifdef CONFIG_LV_DRAW_THREAD_STACKSIZE
+        #define LV_DRAW_THREAD_STACKSIZE CONFIG_LV_DRAW_THREAD_STACKSIZE
+    #else
+        #define LV_DRAW_THREAD_STACKSIZE 32768
+    #endif
+#endif
+
 /* Use NXP's VG-Lite GPU on iMX RTxxx platforms. */
 #ifndef LV_USE_DRAW_VGLITE
     #ifdef CONFIG_LV_USE_DRAW_VGLITE

src/osal/lv_pthread.c

@@ -42,10 +42,12 @@ lv_result_t lv_thread_init(lv_thread_t * thread, lv_thread_prio_t prio, void (*c
                            void * user_data)
 {
     LV_UNUSED(prio);
-    LV_UNUSED(stack_size);
+    pthread_attr_t attr;
+    pthread_attr_init(&attr);
+    pthread_attr_setstacksize(&attr, stack_size);
     thread->callback = callback;
     thread->user_data = user_data;
-    pthread_create(&thread->thread, NULL, generic_callback, thread);
+    pthread_create(&thread->thread, &attr, generic_callback, thread);
     return LV_RESULT_OK;
 }
 

tests/CMakeLists.txt

@@ -340,6 +340,7 @@ foreach( test_case_fname ${TEST_CASE_FILES} )
             ${LIBINPUT_LIBRARIES}
             ${JPEG_LIBRARIES}
             m
+            pthread
             ${TEST_LIBS})
     target_include_directories(${test_name} PUBLIC ${TEST_INCLUDE_DIRS})
     target_compile_options(${test_name} PUBLIC ${LVGL_TESTFILE_COMPILE_OPTIONS})

tests/src/lv_test_conf_full.h

@@ -1,5 +1,6 @@
 #define LV_MEM_SIZE                     (32 * 1024 * 1024)
 #define LV_DRAW_SW_SHADOW_CACHE_SIZE    8
+#define LV_DRAW_THREAD_STACKSIZE    (128 * 1024) /*Increase stack size to 128kB in order to run Thorvg*/
 #define LV_USE_LOG              1
 #define LV_LOG_LEVEL            LV_LOG_LEVEL_TRACE
 #define LV_LOG_PRINTF           1