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Zombie

DirectX fonts

14 posts in this topic

How can i retrieve the pixel length of drawn text in DirectX? I need it to determine the minimum length of a "menu".
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just continuing my last post, sorry, I realized that the other post needed to bee added on to. My question is, do you want to retrieve the pixel leangth of one charecter, or the entire thing?
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Are you using the GDI to blit to a direct draw surface? or bliting a graphic of each letter?
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I write text like this-
surfacename.Drawtext(xpos,ypos,"TEXT",False)
(the last false just makes the text stay in its x,y location and doesn''t go to upper left corner).
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draw all the letters to the screen, take a screenshot, open it up in a paint app, and count the pixel widths and heights for whatever letters you want. this shoud work regardless oh how you are drawing this text


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Just looked up the function and it looks like it updates the current position if you use TRUE for the last parameter.

Perhaps you can read the current position after printing the text and compare it to the position before.
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You can use the GetTextExtentPoint32 function to get the size of string with selected font.
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I assume that you are using Visual Basic since DrawText is a VB only function. You must declare GetTextExtentPoint32 like this:

Private Declare Function GetTextExtentPoint32 Lib "gdi32" Alias "GetTextExtentPoint32A" (ByVal hdc As Long, ByVal lpsz As String, ByVal cbString As Long, lpSize As SIZE) As Long

Then call it. Since I never used it, look it up somewhere.
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You can get the device context of DirectDrawSurface:

void GetTextSize(char* text, HFONT hFont, SIZE& size)
{
HDC hdc;
HFONT oldfont;
gDDSurface->GetDC(&hdc);
// Try with GDI functions
oldfont = (HFONT) SelectObject(hdc, hFont);
//SetBkMode(hdc, TRANSPARENT);
//SetTextAlign(hdc, TA_LEFT / TA_TOP / TA_NOUPDATECP);
GetTextExtentPoint32(hdc, text, strlen(text), &size);
SelectObject(hdc, oldfont);
gDDSurface->ReleaseDC(hdc);
}

Goodluck.
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Yes, I''m using and don''t understand anything about that C code. I have the declaration too (api viewer is for that), but I have no idea how to get it working. To what i should use the SIZE?
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