GUI_MBITMAP_CreateEx example

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    • GUI_MBITMAP_CreateEx example

      Is there an example how to create in-memory bitmap of an image stored in external .dta file?
      We have plenty of RAM and want to store all bitmaps on SD card and then, on power-up, load them in to RAM
      for faster access.

      - Dejan

    • Hello,

      just had such a code based on GUI_MBITMAP_Create() sample under WIN32. For using in WIN32 simulation add opengl32.lib in the linker input.

      C Source Code: Main.c

      1. #include "DIALOG.h"
      2. #include "windows.h"
      4. #define FILE_PATH "C:\\Image.dta"
      6. HANDLE hFile;
      8. GUI_MBITMAP * pMBitmap;
      10. IMAGE_Handle hImage;
      12. int _GetData(void * p, const U8 ** ppData, unsigned NumBytes, U32 Off) {
      13. HANDLE * phFile;
      14. DWORD NumBytesRead;
      15. U8 * pData;
      16. pData = (U8 *)*ppData;
      17. phFile = (HANDLE *)p;
      19. SetFilePointer(*phFile, Off, 0, FILE_BEGIN);
      21. ReadFile(*phFile, pData, NumBytes, &NumBytesRead, NULL);
      23. return NumBytesRead;
      24. }
      26. void MainTask(void) {
      27. GUI_Init();
      29. WM_MULTIBUF_Enable(1);
      31. hFile = CreateFile(FILE_PATH, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
      33. pMBitmap = GUI_MBITMAP_CreateEx(GUI_MBITMAP_DTA_EX, _GetData, &hFile);
      35. hImage = IMAGE_CreateEx(10, 10,
      36. GUI_MBITMAP_2BITMAP(pMBitmap)->XSize,
      37. GUI_MBITMAP_2BITMAP(pMBitmap)->YSize,
      38. WM_HBKWIN,
      39. WM_CF_SHOW,
      40. 0,
      41. GUI_ID_IMAGE0);
      43. IMAGE_SetBitmap(hImage, GUI_MBITMAP_2BITMAP(pMBitmap));
      45. while (1) {
      46. GUI_Delay(50);
      47. }
      48. }
      Display All
      Regards,

      Anthony