feat(draw_buf): add LV_STRIDE_AUTO to let lvgl calculate stride (#5281)

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

src/display/lv_display.h

@@ -231,6 +231,8 @@ int32_t lv_display_get_dpi(const lv_display_t * disp);
  * @param disp              pointer to a display
  * @param buf1              first buffer
  * @param buf2              second buffer (can be `NULL`)
+ * @param buf_size          buffer size in byte
+ * @param render_mode       LV_DISPLAY_RENDER_MODE_PARTIAL/DIRECT/FULL
  */
 void lv_display_set_buffers(lv_display_t * disp, void * buf1, void * buf2, uint32_t buf_size,
                             lv_display_render_mode_t render_mode);

src/draw/lv_draw_buf.h

@@ -21,6 +21,10 @@ extern "C" {
  *      DEFINES
  *********************/
 
+/*Use this value to let LVGL calculate stride automatically*/
+#define LV_STRIDE_AUTO 0
+LV_EXPORT_CONST_INT(LV_STRIDE_AUTO);
+
 /**********************
  *      TYPEDEFS
  **********************/

src/draw/lv_draw_label.c

@@ -403,13 +403,13 @@ static void draw_letter(lv_draw_unit_t * draw_unit, lv_draw_glyph_dsc_t * dsc,
         lv_draw_buf_t * draw_buf = NULL;
         if(g.bpp < LV_IMGFONT_BPP) {
             /*Only check draw buf for bitmap glyph*/
-            draw_buf = lv_draw_buf_reshape(dsc->_draw_buf, 0, g.box_w, g.box_h, 0);
+            draw_buf = lv_draw_buf_reshape(dsc->_draw_buf, 0, g.box_w, g.box_h, LV_STRIDE_AUTO);
             if(draw_buf == NULL) {
                 if(dsc->_draw_buf) lv_draw_buf_destroy(dsc->_draw_buf);
 
                 uint32_t h = g.box_h;
                 if(h * g.box_w < 64) h *= 2; /*Alloc a slightly larger buffer*/
-                draw_buf = lv_draw_buf_create(g.box_w, h, LV_COLOR_FORMAT_A8, 0);
+                draw_buf = lv_draw_buf_create(g.box_w, h, LV_COLOR_FORMAT_A8, LV_STRIDE_AUTO);
                 LV_ASSERT_MALLOC(draw_buf);
                 draw_buf->header.h = g.box_h;
                 dsc->_draw_buf = draw_buf;

src/libs/barcode/lv_barcode.c

@@ -209,7 +209,7 @@ static bool lv_barcode_change_buf_size(lv_obj_t * obj, int32_t w, int32_t h)
     LV_ASSERT(w > 0);
 
     lv_draw_buf_t * old_buf = lv_canvas_get_draw_buf(obj);
-    lv_draw_buf_t * new_buf = lv_draw_buf_create(w, h, LV_COLOR_FORMAT_I1, 0);
+    lv_draw_buf_t * new_buf = lv_draw_buf_create(w, h, LV_COLOR_FORMAT_I1, LV_STRIDE_AUTO);
     if(new_buf == NULL) {
         LV_LOG_ERROR("malloc failed for canvas buffer");
         return false;

src/libs/bin_decoder/lv_bin_decoder.c

@@ -400,7 +400,7 @@ lv_result_t lv_bin_decoder_get_area(lv_image_decoder_t * decoder, lv_image_decod
             /*Use existing one directly*/
         }
         else {
-            decoded = lv_draw_buf_create(w_px, 1, cf_decoded, 0);
+            decoded = lv_draw_buf_create(w_px, 1, cf_decoded, LV_STRIDE_AUTO);
             if(decoded == NULL)
                 return LV_RESULT_INVALID;
         }

src/libs/bmp/lv_bmp.c

@@ -199,7 +199,7 @@ static lv_result_t decoder_get_area(lv_image_decoder_t * decoder, lv_image_decod
     if(decoded_area->y1 == LV_COORD_MIN) {
         *decoded_area = *full_area;
         decoded_area->y2 = decoded_area->y1;
-        if(decoded == NULL) decoded = lv_draw_buf_create(lv_area_get_width(full_area), 1, dsc->header.cf, 0);
+        if(decoded == NULL) decoded = lv_draw_buf_create(lv_area_get_width(full_area), 1, dsc->header.cf, LV_STRIDE_AUTO);
         dsc->decoded = decoded;
     }
     else {

src/libs/libjpeg_turbo/lv_libjpeg_turbo.c

@@ -350,7 +350,7 @@ static lv_draw_buf_t * decode_jpeg_file(const char * filename)
     buffer = (*cinfo.mem->alloc_sarray)
              ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
 
-    decoded = lv_draw_buf_create(cinfo.output_width, cinfo.output_height, LV_COLOR_FORMAT_RGB888, 0);
+    decoded = lv_draw_buf_create(cinfo.output_width, cinfo.output_height, LV_COLOR_FORMAT_RGB888, LV_STRIDE_AUTO);
     if(decoded != NULL) {
         uint8_t * cur_pos = decoded->data;
         size_t stride = cinfo.output_width * JPEG_PIXEL_SIZE;

src/libs/qrcode/lv_qrcode.c

@@ -59,7 +59,7 @@ void lv_qrcode_set_size(lv_obj_t * obj, int32_t size)
     LV_ASSERT_OBJ(obj, MY_CLASS);
 
     lv_draw_buf_t * old_buf = lv_canvas_get_draw_buf(obj);
-    lv_draw_buf_t * new_buf = lv_draw_buf_create(size, size, LV_COLOR_FORMAT_I1, 0);
+    lv_draw_buf_t * new_buf = lv_draw_buf_create(size, size, LV_COLOR_FORMAT_I1, LV_STRIDE_AUTO);
     if(new_buf == NULL) {
         LV_LOG_ERROR("malloc failed for canvas buffer");
         return;

src/libs/tiny_ttf/lv_tiny_ttf.c

@@ -349,7 +349,7 @@ static bool tiny_ttf_cache_create_cb(tiny_ttf_cache_data_t * node, void * user_d
     int w, h;
     w = x2 - x1 + 1;
     h = y2 - y1 + 1;
-    lv_draw_buf_t * draw_buf = lv_draw_buf_create(w, h, LV_COLOR_FORMAT_A8, 0);
+    lv_draw_buf_t * draw_buf = lv_draw_buf_create(w, h, LV_COLOR_FORMAT_A8, LV_STRIDE_AUTO);
     if(NULL == draw_buf) {
         LV_LOG_ERROR("tiny_ttf: out of memory\n");
         return false;

src/others/snapshot/lv_snapshot.c

@@ -148,7 +148,7 @@ lv_image_dsc_t * lv_snapshot_take(lv_obj_t * obj, lv_color_format_t cf)
     h += ext_size * 2;
     if(w == 0 || h == 0) return NULL;
 
-    lv_draw_buf_t * draw_buf = lv_draw_buf_create(w, h, cf, 0);
+    lv_draw_buf_t * draw_buf = lv_draw_buf_create(w, h, cf, LV_STRIDE_AUTO);
     if(draw_buf == NULL) return NULL;
 
     if(lv_snapshot_take_to_buf(obj, cf, (lv_image_dsc_t *)draw_buf, draw_buf->data, draw_buf->data_size) != LV_RESULT_OK) {