Re: Rendering vector text into a bitmap.

I have been trying to draw text into a bitmap using vector sdk v13. This is a console project. I'm missing something, can anyone shed some light? I was able to get some samples from the docs working where I load in a vector file and render it to a bitmap, but my attempts to create my own VectorText object and render it are not working. I'm sure its something simple.

Thank you

 RECT rect;
 rect.top = rect.left = 0;
 rect.right = rect.bottom = 400;

 LVectorBase Vector;
 Vector.SetViewport(&rect);

 VECTORTEXT     Text;
 LVectorText VectorText;

 VectorText.LockObject(&Text);

 Text.Point.x = 50;
 Text.Point.y = 50;
 Text.Point.z = 0;

 Text.pszText = "LEAD Test";
 Text.Pen.LogPen.lopnColor = RGB(255,255,0);
 Text.Brush.LogBrush.lbColor = RGB(0,255,0);
 Text.CharHeight = 8;
 Text.CharWidth = 1;

 VectorText.UnlockObject(&Text);

 Vector.AddObject(&VectorText);

 //Vector.Load("sample.dxf");
 //Vector.AttachToWindow(hWnd);
 //GetClientRect(hWnd, &rect);

 LBitmapBase BitmapBase(400,400,24);
 Vector.Realize(BitmapBase,TRUE); 
 BitmapBase.Save("vector_test.bmp", FILE_BMP, 24, 2);

Edited by moderator Thursday, March 30, 2017 12:08:27 PM(UTC)  | Reason: Not specified

Ike
LEAD Technologies, Inc.

Hi, I added error checking and found that I needed to insert a layer first. The code builds and runs without error now but I get a blank bitmap. Any suggestions?

Thank you

Here is new code:

 int iRet;
 RECT rect;
 rect.top = rect.left = 0;
 rect.right = rect.bottom = 400;

 if( LSettings::IsSupportLocked(L_SUPPORT_VECTOR) )
  cout << "Vector support is locked!!\n";

 LVectorBase Vector;
 Vector.SetViewport(&rect);

 LVectorLayer layer;

 // add layer
 iRet = Vector.AddLayer(&layer);
 if( iRet != 1 )
  printf("Error adding layer error[%i]\n", iRet);

 iRet = Vector.SetActiveLayer(&layer);
 if( iRet != 1 )
  printf("Error setting active layer error[%i]\n", iRet);

 VECTORTEXT     Text;
 LVectorText VectorText;

 Text.Point.x = 50;
 Text.Point.y = 50;
 Text.Point.z = 0;

 Text.pszText = "LEAD Test";
 Text.Pen.LogPen.lopnColor = RGB(255,255,0);
 Text.Brush.LogBrush.lbColor = RGB(0,255,0);
 Text.CharHeight = 8;
 Text.CharWidth = 0;

 // add text object
 iRet = layer.AddObject(&VectorText);
 if( iRet != 1 )
  printf("Error adding object error[%i]\n", iRet);

 // render to bitmap
 LBitmapBase BitmapBase(400,400,24);
 iRet = Vector.Realize(BitmapBase,TRUE); 
 if( iRet != 1 )
  printf("Error realizing object error[%i]\n", iRet);

 iRet = BitmapBase.Save("vector_test.bmp", FILE_BMP, 24, 2);
 if( iRet != 1 )
  printf("Error saving bitmap error[%i]\n", iRet);

I changed the code to get it working. Here's the modified version:
LBase::LoadLibraries(LV_KRN);
int iRet;
RECT rect;
rect.top = rect.left = 0;
rect.right = rect.bottom = 400;

if( LSettings::IsSupportLocked(L_SUPPORT_VECTOR) )
   printf("Vector support is locked!!\n");

LVectorBase Vector;
Vector.SetViewport(&rect);

VECTORPOINT point1={0,0,0,0}, point2={400,400,0,0};
Vector.SetParallelogram(&point1, &point2);

VECTORLAYERDESC VectorLayerDesc={0};
VectorLayerDesc.nSize = sizeof(VECTORLAYERDESC);
lstrcpy(VectorLayerDesc.szName, TEXT("First Layer"));
VectorLayerDesc.bVisible = TRUE;
VectorLayerDesc.bLocked = FALSE;
VectorLayerDesc.dwTag = 0;

LVectorLayer layer(&VectorLayerDesc);
// add layer
iRet = Vector.AddLayer(&layer);
if( iRet != 1 )
   printf("Error adding layer error[%i]\n", iRet);

iRet = Vector.SetActiveLayer(&layer);
if( iRet != 1 )
   printf("Error setting active layer error[%i]\n", iRet);

VECTORTEXT     Text = {0};
// VectorText.LockObject(&Text);
Text.Point.x = 50;
Text.Point.y = 50;
Text.Point.z = 0;

Text.pszText = "LEAD Test";
Text.Pen.LogPen.lopnColor = RGB(255,255,0);
Text.Brush.LogBrush.lbColor = RGB(0,255,0);
Text.CharHeight = 8;
Text.CharWidth = 0;
LVectorText VectorText(&Text);
// add text object
iRet = layer.AddObject(&VectorText);
if( iRet != 1 )
   printf("Error adding object error[%i]\n", iRet);
// render to bitmap
LBitmapBase BitmapBase(400,400,24);
iRet = Vector.Realize(BitmapBase,TRUE);
if( iRet != 1 )
   printf("Error realizing object error[%i]\n", iRet);
iRet = BitmapBase.Save("vector_test.bmp", FILE_BMP, 24, 2);
if( iRet != 1 )
   printf("Error saving bitmap error[%i]\n", iRet);

Amin Dodin
LEADTOOLS Technical Support

That works. How to I position the text? I Tried changing the Text x,y location as well as the dwFlag for alignment but it's not working.

Thanks

Keep in mind that the center point of the resulting BMP corresponds to coordinates (0,0) in the vector drawing. For example, to place the text in the left-top corner of the BMP file, set:
Text.Point.x = -200;
Text.Point.y = 200;

Amin Dodin
LEADTOOLS Technical Support