Description
Load image bits from image memory
Syntax
| Visual Basic |
|---|
Public Sub LoadFromMemory( _ ByVal pData As Variant _ ) |
Parameters
- pData
Remarks
!MISSING PHRASE '_ZONEFAIL_IMG'!
The structure of image memory is:
- Lines are stored starting from the top line of the image.
- Each row should be at least object.LineBytes long
- Minimum size of image memory should be:
ImageBytes = object.Height * object.LineBytes - If bytes extend beyond image boundary, extra bytes are ignored.
The structure of image memory for a buffer of a Bitonal image is:
- Each byte represents 8 pixels with the most significant bit corresponding to the leftmost pixel.
- Zero value of the bit is treated as black pixel.
The structure of image memory for a buffer of a Grayscale image is:
- Each byte represents an image pixel
- Byte value represents pixel intensity with 0x00 for black pixel and 0xFF for white pixel
The structure of image memory for a buffer of a Color image is:
- Each image pixel is represented by 3 bytes
- 3-Byte value represents RGB color of a pixel with 0x000000 for black pixel and 0xFFFFFF for white pixel
Example
| VBExample (Visual Basic) |  Copy Code |
|---|---|
Public Sub T_LoadFromMemory(ByRef Image As CiImage, _ Width, Height, Mem() As Byte) Image.Create Width, Height Image.LoadFromMemory Mem End Sub | |
| C++ Example (C++) | Copy Code |
|---|---|
bool MemoryToImage (ICiImagePtr &Image, long w, long h, long bpp, char *pSrc, long nSize) { bool bRet = false; _variant_t v; SAFEARRAY* psa; char *pByte = NULL; SAFEARRAYBOUND bounds = {nSize, 0}; Image->CreateBpp (w, h, bpp); psa = SafeArrayCreate (VT_UI1, 1, &bounds); if (!psa) goto EXIT; // Transfer data into safearray SafeArrayAccessData (psa, reinterpret_cast <void **> (&pByte)); memcpy (pByte, pSrc, nSize); SafeArrayUnaccessData (psa); // Put safearray into variant v.vt = VT_ARRAY | VT_UI1; v.parray = psa; // Load variant data into image Image->LoadFromMemory(v); bRet = true; EXIT: return bRet; } | |