feat(vg_lite): add porting layer for VG-Lite simulator based on ThorVG (#5256)

Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>

Kconfig

@@ -355,6 +355,15 @@ menu "LVGL configuration"
 				default n
 				depends on LV_USE_DRAW_VG_LITE
 
+			config LV_USE_VG_LITE_THORVG
+				bool "Use ThorVG to simulate VG-Lite hardware."
+				default n
+				depends on LV_USE_DRAW_VG_LITE && LV_USE_THORVG
+				help
+					Use thorvg to simulate VG-Lite hardware behavior, it's useful
+					for debugging and testing on PC simulator. Enable LV_USE_THORVG,
+					Either internal ThorVG or external ThorVG library is required.
+
 			config LV_USE_GPU_SDL
 				bool "Use SDL renderer API"
 				default n

env_support/cmake/custom.cmake

@@ -16,7 +16,7 @@ endif( LV_CONF_PATH )
 option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
 
 # Set sources used for LVGL components
-file(GLOB_RECURSE SOURCES ${LVGL_ROOT_DIR}/src/*.c ${LVGL_ROOT_DIR}/src/*.S)
+file(GLOB_RECURSE SOURCES ${LVGL_ROOT_DIR}/src/*.c ${LVGL_ROOT_DIR}/src/dev/vg_lite_tvg/*.cpp ${LVGL_ROOT_DIR}/src/*.S)
 file(GLOB_RECURSE EXAMPLE_SOURCES ${LVGL_ROOT_DIR}/examples/*.c)
 file(GLOB_RECURSE DEMO_SOURCES ${LVGL_ROOT_DIR}/demos/*.c)
 file(GLOB_RECURSE THORVG_SOURCES ${LVGL_ROOT_DIR}/src/libs/thorvg/*.cpp)

lv_conf_template.h

@@ -140,6 +140,10 @@
 
 /* Enable VG-Lite assert. */
 #define LV_VG_LITE_USE_ASSERT 0
+
+/* Simulate VG-Lite hardware using ThorVG */
+#define LV_USE_VG_LITE_THORVG  0
+
 #endif
 
 /*=================

src/draw/vg_lite/lv_draw_vg_lite_type.h

@@ -19,7 +19,12 @@ extern "C" {
 #if LV_USE_DRAW_VG_LITE
 
 #include "../lv_draw.h"
+
+#if LV_USE_VG_LITE_THORVG
+#include "../../dev/vg_lite_tvg/vg_lite.h"
+#else
 #include <vg_lite.h>
+#endif
 
 /*********************
  *      DEFINES

src/draw/vg_lite/lv_vg_lite_utils.h

@@ -19,7 +19,11 @@ extern "C" {
 #if LV_USE_DRAW_VG_LITE
 
 #include <stdbool.h>
+#if LV_USE_VG_LITE_THORVG
+#include "../../dev/vg_lite_tvg/vg_lite.h"
+#else
 #include <vg_lite.h>
+#endif
 
 /*********************
  *      DEFINES

src/libs/thorvg/tvgSwRenderer.cpp

@@ -446,7 +446,11 @@ bool SwRenderer::target(pixel_t* data, uint32_t stride, uint32_t w, uint32_t h,
 
 bool SwRenderer::preRender()
 {
+#if LV_USE_DRAW_VG_LITE && LV_USE_VG_LITE_THORVG
+    return true;
+#else
     return rasterClear(surface, 0, 0, surface->w, surface->h);
+#endif
 }
 
 

src/lv_conf_internal.h

@@ -386,6 +386,16 @@
         #define LV_VG_LITE_USE_ASSERT 0
     #endif
 #endif
+
+/* Simulate VG-Lite hardware using ThorVG */
+#ifndef LV_USE_VG_LITE_THORVG
+    #ifdef CONFIG_LV_USE_VG_LITE_THORVG
+        #define LV_USE_VG_LITE_THORVG CONFIG_LV_USE_VG_LITE_THORVG
+    #else
+        #define LV_USE_VG_LITE_THORVG  0
+    #endif
+#endif
+
 #endif
 
 /*=================