# Loading a bitmap from USER partition to VC4 **URL:** \ **Category:** HMI & Visualization\ **Tags:** vc4\ **Created:** [February 1, 2024, 2:44pm UTC](https://community.br-automation.com/t/loading-a-bitmap-from-user-partition-to-vc4/2078 "2024-02-01T14:44:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Curtis\_Weyenberg](https://avatars.discourse-cdn.com/v4/letter/c/FF8800/32.png) [@Curtis\_Weyenberg](https://community.br-automation.com/u/Curtis_Weyenberg)\ **Post date:** [February 1, 2024, 2:44pm UTC](https://community.br-automation.com/t/loading-a-bitmap-from-user-partition-to-vc4/2078/1 "2024-02-01T14:44:38Z")
Hello, I am trying to load a bitmap stored in a folder on the user partition to VC4. There may be a translation error in the help documentation for VA\_LoadBitmap and VA\_BlitBitmap because it says to use a pointer to a pointer of sVCBitmap. GUID fd1fd7c6-37db-46e9-8a47-2088277e8919 Notes: The bitmap is stored on F:/Barcode/ and has the name Camera1.png. This image gets updated via FTP so it will need to be reloaded as needed. When I set LoadBitmap to TRUE, i get an updated stVCBitmap1.vpInternalData. The other parts of the structure do not get updated. When setting ShowBitmap to TRUE, nothing happens on the HMI. (_Vars_) VAR CONSTANT VISUALIZATION\_NAME : STRING[80] := ‘FT50’; DEV\_BARCODE : STRING[16] := ‘Barcode’;//Assigned device in CPU config F:\Barcode END\_VAR VAR TestLoadBitmap : BOOL := 0; strBitmap1 : STRING[80] := ‘’; strBitmap1Path : STRING[80] := ‘’; pBitmap : REFERENCE TO sVCBitmap; stVCBitmap1 : {REDUND\_UNREPLICABLE} sVCBitmap; status\_VA\_LoadBitmap : UINT := 0; TestShowBitmap : BOOL := 0; status\_VA\_BlitBitmap : UINT := 0; LoadBitmap : BOOL := 0; ShowBitmap : BOOL := 0; uiStatusAccess : UINT := 0; uiStep : INT := 0; uiStatus : UINT := 0; END\_VAR ``` IF (VC_HANDLE = 0) THEN VC_HANDLE := VA_Setup(1, VISUALIZATION_NAME); END_IF IF (VC_HANDLE <> 0) THEN uiStatusAccess := VA_Saccess(1, VC_HANDLE); IF (uiStatusAccess = 0) THEN CASE uiStep OF 0: (* Wait State*) IF LoadBitmap THEN LoadBitmap := FALSE; strBitmap1 := 'Camera1.png'; strBitmap1Path := 'Barcode/Camera1.png'; stVCBitmap1.vpInternalData := 0;//Need to initialize to zero when loading //stVCBitmap1.vpData := uiStep := 1; ELSIF ShowBitmap THEN ShowBitmap := FALSE; uiStep := 2; END_IF 1://Load bitmap //uiStatus := VA_LoadBitmap(1,VC_HANDLE,DEV_BARCODE,strBitmap1,ADR(pBitmap )); uiStatus := VA_LoadBitmap(enable := 1,VCHandle := VC_HANDLE,ucDevice := DEV_BARCODE,ucPath := strBitmap1,ppBitmap := ADR(stVCBitmap1)); IF (uiStatus = 0) THEN uiStep := 0; ELSIF (uiStatus = 7000) THEN (*Busy*) ELSE(*Go to Error Step*) uiStep := 10; END_IF 2://Blit bitmap (show on HMI) //uiStatus := VA_BlitBitmap(1,VC_HANDLE,ADR(pBitmap), 100, 100, 0,0,0,0,0); uiStatus := VA_BlitBitmap(1,VC_HANDLE,ADR(stVCBitmap1), 100, 100,0,0,0,0,0); IF (uiStatus = 0) THEN uiStep := 0; ELSIF (uiStatus = 7000) THEN (*Busy*) ELSE(*Go to Error Step*) uiStep := 10; END_IF END_CASE VA_Srelease(1, VC_HANDLE); END_IF END_IF ``` ---
**Author:** ![valerio.manenti](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/valerio.manenti/32/11712_2.png) [@valerio.manenti](https://community.br-automation.com/u/valerio.manenti)\ **Post date:** [February 2, 2024, 2:40am UTC](https://community.br-automation.com/t/loading-a-bitmap-from-user-partition-to-vc4/2078/2 "2024-02-02T02:40:11Z")
Hi Curtis, I reviewed a little bit your code and I was able to see a bitmap in my visualization: ![image](https://europe1.discourse-cdn.com/brcommunity/original/2X/b/b4d55b0bf5f53ebb46de5a2a73d603bebf8558be.png) [\_\_\_\_LOAD.zip](https://community.br-automation.com/uploads/short-url/8A75bf7x8Ax1QUHRDR7wVc6wmSc.zip) (1.3 KB) Ciao Valerio ---
**Author:** ![Curtis\_Weyenberg](https://avatars.discourse-cdn.com/v4/letter/c/FF8800/32.png) [@Curtis\_Weyenberg](https://community.br-automation.com/u/Curtis_Weyenberg)\ **Post date:** [February 2, 2024, 8:16pm UTC](https://community.br-automation.com/t/loading-a-bitmap-from-user-partition-to-vc4/2078/3 "2024-02-02T20:16:15Z")
Thank you Valerio, I was able to get my image to load with your changes. I also changed to a bmp because the png colors didn’t match the VC profile. Here is my working test code. strBitmap1 := ‘Camera1.bmp’; ``` IF (VC_HANDLE = 0) THEN VC_HANDLE := VA_Setup(1, VISUALIZATION_NAME); END_IF IF (VC_HANDLE <> 0) THEN uiStatusAccess := VA_Saccess(1, VC_HANDLE); IF (uiStatusAccess = 0) THEN CASE uiStep OF 0: (* Wait State*) IF LoadBitmap THEN LoadBitmap := FALSE; strBitmap := strBitmap1; stVCBitmap1.vpInternalData := 0;//Need to initialize to zero when loading uiStep := 1; ELSIF ShowBitmap THEN ShowBitmap := FALSE; uiStep := 2; END_IF 1://Load bitmap uiStatus := VA_LoadBitmap(enable := 1,VCHandle := VC_HANDLE,ucDevice := DEV_BARCODE,ucPath := strBitmap,ppBitmap := ADR(ppBitmap)); IF (uiStatus = 0) THEN uiStep := 2; ELSIF (uiStatus = 7000) THEN (*Busy*) ELSE(*Go to Error Step*) uiStep := 10; END_IF 2://Blit bitmap (show on HMI) uiStatus := VA_BlitBitmap(1,VC_HANDLE,ppBitmap, 0, 0,0,0,50,50,0); IF (uiStatus = 0) THEN uiStep := 3; ELSIF (uiStatus = 7000) THEN (*Busy*) ELSE(*Go to Error Step*) uiStep := 10; END_IF 3: //Free bitmap uiErrorBitmapFromFile := VA_FreeBitmap(1, VC_HANDLE, ADR(ppBitmap)); IF (uiErrorBitmapFromFile = 0) THEN uiStep := 0; ppBitmap := ADR(pBitmap);(* Reinitialize ppBitmap to have the possibility to use it again *) //LoadBitmap := TRUE; END_IF END_CASE VA_Srelease(1, VC_HANDLE); END_IF END_IF ```