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Implement NtGdiGetCharABCWidths. Not sure if the math is right. Tested with Lazarus IDE. It is completely based on Filip Navara work on NtGdiGetCharWidth32.

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svn path=/trunk/; revision=22115
This commit is contained in:
James Tabor 2006-05-30 06:50:03 +00:00
parent 5e2e227e4a
commit 4c8a553e26
1 changed files with 112 additions and 2 deletions
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114
reactos/subsystems/win32/win32k/objects/text.c
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@ -1973,8 +1973,118 @@ NtGdiGetCharABCWidths(HDC hDC,
UINT LastChar,
LPABC abc)
{
DPRINT1("NtGdiGetCharABCWidths Is unimplemented, keep going anyway\n");
return 1;
LPABC SafeBuffer;
PDC dc;
PTEXTOBJ TextObj;
PFONTGDI FontGDI;
FT_Face face;
FT_CharMap charmap, found = NULL;
UINT i, glyph_index, BufferSize;
HFONT hFont = 0;
NTSTATUS Status;
if (LastChar < FirstChar)
{
SetLastWin32Error(ERROR_INVALID_PARAMETER);
return FALSE;
}
BufferSize = (LastChar - FirstChar + 1) * sizeof(ABC);
SafeBuffer = ExAllocatePoolWithTag(PagedPool, BufferSize, TAG_GDITEXT);
if (SafeBuffer == NULL)
{
SetLastWin32Error(ERROR_NOT_ENOUGH_MEMORY);
return FALSE;
}
dc = DC_LockDc(hDC);
if (dc == NULL)
{
ExFreePool(SafeBuffer);
SetLastWin32Error(ERROR_INVALID_HANDLE);
return FALSE;
}
hFont = dc->w.hFont;
TextObj = TEXTOBJ_LockText(hFont);
DC_UnlockDc(dc);
if (TextObj == NULL)
{
ExFreePool(SafeBuffer);
SetLastWin32Error(ERROR_INVALID_HANDLE);
return FALSE;
}
FontGDI = ObjToGDI(TextObj->Font, FONT);
face = FontGDI->face;
if (face->charmap == NULL)
{
for (i = 0; i < face->num_charmaps; i++)
{
charmap = face->charmaps[i];
if (charmap->encoding != 0)
{
found = charmap;
break;
}
}
if (!found)
{
DPRINT1("WARNING: Could not find desired charmap!\n");
ExFreePool(SafeBuffer);
SetLastWin32Error(ERROR_INVALID_HANDLE);
return FALSE;
}
IntLockFreeType;
FT_Set_Charmap(face, found);
IntUnLockFreeType;
}
IntLockFreeType;
FT_Set_Pixel_Sizes(face,
TextObj->logfont.lfWidth,
/* FIXME should set character height if neg */
(TextObj->logfont.lfHeight < 0 ? - TextObj->logfont.lfHeight :
TextObj->logfont.lfHeight == 0 ? 11 : TextObj->logfont.lfHeight));
for (i = FirstChar; i <= LastChar; i++)
{
int adv, lsb, bbx, left, right;
glyph_index = FT_Get_Char_Index(face, i);
FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT);
left = (INT)face->glyph->metrics.horiBearingX & -64;
right = (INT)((face->glyph->metrics.horiBearingX + face->glyph->metrics.width) + 63) & -64;
adv = (face->glyph->advance.x + 32) >> 6;
// int test = (INT)(face->glyph->metrics.horiAdvance + 63) >> 6;
// DPRINT1("Advance Wine %d and Advance Ros %d\n",test, adv ); /* It's the same!*/
lsb = left >> 6;
bbx = (right - left) >> 6;
/*
DPRINT1("lsb %d and bbx %d\n", lsb, bbx );
*/
SafeBuffer[i - FirstChar].abcA = lsb;
SafeBuffer[i - FirstChar].abcB = bbx;
SafeBuffer[i - FirstChar].abcC = adv - lsb - bbx;
}
IntUnLockFreeType;
TEXTOBJ_UnlockText(TextObj);
Status = MmCopyToCaller(abc, SafeBuffer, BufferSize);
if (! NT_SUCCESS(Status))
{
SetLastNtError(Status);
ExFreePool(SafeBuffer);
return FALSE;
}
ExFreePool(SafeBuffer);
DPRINT("NtGdiGetCharABCWidths Worked!\n");
return TRUE;
}
BOOL