more feature

src/gui/screenshot.cpp

@@ -0,0 +1,55 @@
+#include "config.h"
+#include "screenshot.h"
+
+lv_disp_drv_t screenshot_disp_drv;
+static lv_disp_buf_t screenshot_disp_buf;
+static lv_color_t screenshot_buf1[ LV_HOR_RES_MAX * 1 ];
+
+lv_disp_t *system_disp;
+lv_disp_t *screenshot_disp;
+
+static void screenshot_disp_flush( lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p );
+
+void screenshot_setup( void ) {
+
+    system_disp = lv_disp_get_default();
+
+    lv_disp_buf_init(&screenshot_disp_buf, screenshot_buf1, NULL, LV_HOR_RES_MAX * 1 );
+
+    screenshot_disp_drv.hor_res = TFT_WIDTH;
+    screenshot_disp_drv.ver_res = TFT_HEIGHT;
+    screenshot_disp_drv.flush_cb = screenshot_disp_flush;
+    screenshot_disp_drv.buffer = &screenshot_disp_buf;
+    screenshot_disp = lv_disp_drv_register( &screenshot_disp_drv ); 
+
+    lv_disp_set_default( system_disp );
+}
+
+void screenshot_take( void ) {
+/*
+    unsigned char* image = (unsigned char*)ps_malloc(240 * 240 * 3);
+    Serial.printf("Total heap: %d\r\n", ESP.getHeapSize());
+    Serial.printf("Free heap: %d\r\n", ESP.getFreeHeap());
+    Serial.printf("Total PSRAM: %d\r\n", ESP.getPsramSize());
+    Serial.printf("Free PSRAM: %d\r\n", ESP.getFreePsram());
+*/
+    lv_obj_invalidate(lv_scr_act());
+    lv_disp_set_default( screenshot_disp );
+    lv_refr_now( screenshot_disp ); 
+    lv_obj_invalidate(lv_scr_act());
+    lv_disp_set_default( system_disp );
+    lv_refr_now( system_disp ); 
+
+//    free(image);
+}
+
+static void screenshot_disp_flush( lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p ) {
+
+    int32_t x, y;
+    for(y = area->y1; y <= area->y2; y++) {
+//        Serial.printf("refresh Y=%d\r\n",y);
+//        for(x = area->x1; x <= area->x2; x++) {
+//        }
+    }
+    lv_disp_flush_ready(disp_drv);
+}