feat(vg_lite): add A8 and L8 dest buffer support (#6884)

Signed-off-by: yushuailong1 <yushuailong1@xiaomi.com>
Signed-off-by: FASTSHIFT <vifextech@foxmail.com>
Co-authored-by: yushuailong1 <yushuailong1@xiaomi.com>
Co-authored-by: FASTSHIFT <vifextech@foxmail.com>

src/draw/vg_lite/lv_vg_lite_utils.c

@@ -398,6 +398,8 @@ void lv_vg_lite_matrix_dump_info(const vg_lite_matrix_t * matrix)
 bool lv_vg_lite_is_dest_cf_supported(lv_color_format_t cf)
 {
     switch(cf) {
+        case LV_COLOR_FORMAT_A8:
+        case LV_COLOR_FORMAT_L8:
         case LV_COLOR_FORMAT_RGB565:
         case LV_COLOR_FORMAT_ARGB8888:
         case LV_COLOR_FORMAT_XRGB8888:
@@ -419,6 +421,7 @@ bool lv_vg_lite_is_src_cf_supported(lv_color_format_t cf)
     switch(cf) {
         case LV_COLOR_FORMAT_A4:
         case LV_COLOR_FORMAT_A8:
+        case LV_COLOR_FORMAT_L8:
         case LV_COLOR_FORMAT_RGB565:
         case LV_COLOR_FORMAT_ARGB8888:
         case LV_COLOR_FORMAT_XRGB8888:

src/others/snapshot/lv_snapshot.c

@@ -82,6 +82,7 @@ lv_result_t lv_snapshot_take_to_draw_buf(lv_obj_t * obj, lv_color_format_t cf, l
         case LV_COLOR_FORMAT_RGB888:
         case LV_COLOR_FORMAT_XRGB8888:
         case LV_COLOR_FORMAT_ARGB8888:
+        case LV_COLOR_FORMAT_A8:
         case LV_COLOR_FORMAT_L8:
         case LV_COLOR_FORMAT_I1:
             break;

src/others/vg_lite_tvg/vg_lite_tvg.cpp

@@ -422,6 +422,19 @@ static vg_lite_converter<vg_color32_t, uint8_t> conv_alpha4_to_bgra8888(
     }
 });
 
+static vg_lite_converter<vg_color32_t, uint8_t> conv_l8_to_bgra8888(
+    [](vg_color32_t * dest, const uint8_t * src, vg_lite_uint32_t px_size, vg_lite_uint32_t /* color */)
+{
+    while(px_size--) {
+        dest->alpha = 0xFF;
+        dest->red = *src;
+        dest->green = *src;
+        dest->blue = *src;
+        dest++;
+        src++;
+    }
+});
+
 /**********************
  *      MACROS
  **********************/
@@ -649,6 +662,24 @@ extern "C" {
         }
     }
 
+    static void picture_bgra8888_to_l8(uint8_t * dest, const vg_color32_t * src, vg_lite_uint32_t px_size)
+    {
+        while(px_size--) {
+            *dest = (src->red * 19595 + src->green * 38469 + src->blue * 7472) >> 16;
+            src++;
+            dest++;
+        }
+    }
+
+    static void picture_bgra8888_to_alpha8(uint8_t * dest, const vg_color32_t * src, vg_lite_uint32_t px_size)
+    {
+        while(px_size--) {
+            *dest = src->alpha;
+            src++;
+            dest++;
+        }
+    }
+
     vg_lite_error_t vg_lite_finish(void)
     {
         vg_lite_ctx * ctx = vg_lite_ctx::get_instance();
@@ -683,6 +714,18 @@ extern "C" {
                     (const vg_color32_t *)ctx->get_temp_target_buffer(),
                     ctx->target_px_size);
                 break;
+            case VG_LITE_L8:
+                picture_bgra8888_to_l8(
+                    (uint8_t *)ctx->target_buffer,
+                    (const vg_color32_t *)ctx->get_temp_target_buffer(),
+                    ctx->target_px_size);
+                break;
+            case VG_LITE_A8:
+                picture_bgra8888_to_alpha8(
+                    (uint8_t *)ctx->target_buffer,
+                    (const vg_color32_t *)ctx->get_temp_target_buffer(),
+                    ctx->target_px_size);
+                break;
             case VG_LITE_BGRA8888:
             case VG_LITE_BGRX8888:
                 /* No conversion required. */
@@ -2440,6 +2483,11 @@ static Result picture_load(vg_lite_ctx * ctx, std::unique_ptr<Picture> & picture
                 }
                 break;
 
+            case VG_LITE_L8: {
+                    conv_l8_to_bgra8888.convert(&target, source);
+                }
+                break;
+
             case VG_LITE_BGRX8888: {
                     conv_bgrx8888_to_bgra8888.convert(&target, source);
                 }

tests/src/test_cases/draw/test_render_to_l8.c

@@ -18,9 +18,6 @@ void tearDown(void)
 
 void test_render_to_l8(void)
 {
-#if LV_USE_DRAW_VG_LITE
-    TEST_PASS();
-#else
     lv_display_set_color_format(NULL, LV_COLOR_FORMAT_L8);
 
     lv_opa_t opa_values[2] = {0xff, 0x80};
@@ -41,7 +38,6 @@ void test_render_to_l8(void)
             TEST_ASSERT_EQUAL_SCREENSHOT(buf);
         }
     }
-#endif
 }
 
 #endif