Update examples

Author: RagacDino

examples/Inkplate6FLICK/Advanced/ImageFromBuffer/ImageFromBuffer.ino

@@ -0,0 +1,100 @@
+/**
+ **************************************************
+ *
+ * @file        ImageFromBuffer.ino
+ * @brief       Example showing an 8-bit grayscale JPG from buffer
+ *              on a standard Inkplate 6FLICK (1024x758)
+ *
+ * The image was converted with:
+ * https://notisrac.github.io/FileToCArray/
+ *
+ * Used options:
+ *   - Code format: Hex (0x00)
+ *   - Palette mod: 8bit grayscale (1byte/pixel)
+ *   - Multi line
+ *   - Separate bytes of pixels
+ *   - static + const + unsigned + PROGMEM
+ *
+ * The resulting header (cat.h) contains:
+ *   - #define CAT_WIDTH  1024
+ *   - #define CAT_HEIGHT 758
+ *   - static const unsigned char cat[] PROGMEM = { ... };
+ *
+ ***************************************************/
+#include <Inkplate-LVGL.h>
+
+// Image data
+#include "cat.h"
+
+// Inkplate object
+Inkplate inkplate(INKPLATE_1BIT);
+
+lv_obj_t *screen;
+
+// LVGL image descriptor for 8-bit grayscale (L8)
+const lv_image_dsc_t my_image = {
+    .header = {
+        .cf = LV_COLOR_FORMAT_L8,     // 8-bit luminance / grayscale
+        .w  = CAT_WIDTH,
+        .h  = CAT_HEIGHT,
+    },
+    .data_size = CAT_WIDTH * CAT_HEIGHT,   // 1 byte per pixel
+    .data      = cat,                      // buffer from cat.h
+};
+
+// LVGL task that ticks the timer every 5 ms
+void lvgl_task(void *arg) {
+    for (;;) {
+        lv_tick_inc(5);
+        lv_timer_handler();
+        vTaskDelay(pdMS_TO_TICKS(5));
+    }
+}
+
+void setup() {
+    Serial.begin(115200);
+    delay(1000);
+    Serial.println("Starting LVGL grayscale image example on Inkplate 6...");
+
+    // Initialize Inkplate + LVGL in full render mode
+    inkplate.begin(LV_DISP_RENDER_MODE_FULL);
+
+    // Enable dithering (useful for grayscale on BW e-paper)
+    inkplate.enableDithering(1);
+
+    // LVGL task on core 1
+    xTaskCreatePinnedToCore(
+        lvgl_task,
+        "lvgl_tick",
+        16000,
+        nullptr,
+        2,
+        nullptr,
+        1);
+
+    delay(100);
+
+    // Get the active screen
+    screen = lv_scr_act();
+    lv_obj_set_style_bg_color(screen, lv_color_white(), 0);
+    lv_obj_set_style_bg_opa(screen, LV_OPA_COVER, 0);
+
+    // LVGL image object
+    lv_obj_t *img = lv_image_create(screen);
+    lv_image_set_src(img, &my_image);
+    lv_obj_center(img);
+
+    // Manually call timer a few times so everything renders
+    for (int i = 0; i < 5; i++) {
+        lv_timer_handler();
+        delay(10);
+    }
+
+    // Send framebuffer to Inkplate 6FLICK
+    inkplate.display();
+    Serial.println("Display updated with 8-bit grayscale (L8) image");
+}
+
+void loop() {
+    // Nothing needed in loop
+}