/*++ | |
Copyright (c) 2006, Intel Corporation | |
All rights reserved. This program and the accompanying materials | |
are licensed and made available under the terms and conditions of the BSD License | |
which accompanies this distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
Module Name: | |
Fonts.c | |
Abstract: | |
This file contains the Glyph/Font processing code to the HII database. | |
--*/ | |
#include "HiiDatabase.h" | |
// | |
// We only need to define a wide glyph, since we will seed the narrow glyph with EFI_NARROW_GLYPH size of | |
// this data structure | |
// | |
UINT8 mUnknownGlyph[38] = { | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xAA, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xaa, | |
0x55, | |
0xAA | |
}; | |
EFI_STATUS | |
EFIAPI | |
HiiGetGlyph ( | |
IN EFI_HII_PROTOCOL *This, | |
IN CHAR16 *Source, | |
IN OUT UINT16 *Index, | |
OUT UINT8 **GlyphBuffer, | |
OUT UINT16 *BitWidth, | |
IN OUT UINT32 *InternalStatus | |
) | |
/*++ | |
Routine Description: | |
Translates a Unicode character into the corresponding font glyph. | |
If the Source was pointing to a non-spacing character, the next Source[*Index] | |
character will be parsed and OR'd to the GlyphBuffer until a spacing character | |
is found in the Source. Since non-spacing characters are considered to be the | |
same pixel width as a regular character their BitWidth will be reflected correctly | |
however due to their special attribute, they are considered to be zero advancing width. | |
This basically means that the cursor would not advance, thus the character that follows | |
it would overlay the non-spacing character. The Index is modified to reflect both the | |
incoming array entry into the Source string but also the outgoing array entry after having | |
parsed the equivalent of a single Glyph's worth of data. | |
Arguments: | |
Returns: | |
--*/ | |
{ | |
EFI_HII_GLOBAL_DATA *GlobalData; | |
EFI_HII_DATA *HiiData; | |
UINTN Count; | |
BOOLEAN Narrow; | |
UINTN Location; | |
UINTN SearchLocation; | |
UINTN Value; | |
CHAR16 Character; | |
UINTN Attributes; | |
if (This == NULL) { | |
return EFI_INVALID_PARAMETER; | |
} | |
HiiData = EFI_HII_DATA_FROM_THIS (This); | |
GlobalData = HiiData->GlobalData; | |
Count = sizeof (GlobalData->NarrowGlyphs->GlyphCol1); | |
Location = *Index; | |
SearchLocation = *Index; | |
Narrow = TRUE; | |
if (Source[Location] == NARROW_CHAR || Source[Location] == WIDE_CHAR) { | |
*InternalStatus = 0; | |
} | |
// | |
// We don't know what glyph database to look in - let's figure it out | |
// | |
if (*InternalStatus == 0) { | |
// | |
// Determine if we are looking for narrow or wide glyph data | |
// | |
do { | |
if (Source[SearchLocation] == NARROW_CHAR || Source[SearchLocation] == WIDE_CHAR) { | |
// | |
// We found something that identifies what glyph database to look in | |
// | |
if (Source[SearchLocation] == WIDE_CHAR) { | |
Narrow = FALSE; | |
*BitWidth = WIDE_WIDTH; | |
*InternalStatus = WIDE_CHAR; | |
Location++; | |
break; | |
} else { | |
Narrow = TRUE; | |
*BitWidth = NARROW_WIDTH; | |
*InternalStatus = NARROW_CHAR; | |
Location++; | |
break; | |
} | |
} | |
} while (SearchLocation-- > 0); | |
} | |
if (*InternalStatus == NARROW_CHAR) { | |
Narrow = TRUE; | |
*BitWidth = NARROW_WIDTH; | |
} else if (*InternalStatus == WIDE_CHAR) { | |
Narrow = FALSE; | |
*BitWidth = WIDE_WIDTH; | |
} else { | |
// | |
// Without otherwise knowing what the width is narrow (e.g. someone passed in a string with index of 0 | |
// we wouldn't be able to determine the width of the data.) | |
// BUGBUG - do we go to wide database and if exist, ignore narrow? Check Unicode spec.... | |
// | |
Narrow = TRUE; | |
*BitWidth = NARROW_WIDTH; | |
} | |
Character = Source[Location]; | |
if (Narrow) { | |
if (GlobalData->NarrowGlyphs[Character].UnicodeWeight != 0x0000) { | |
*GlyphBuffer = (UINT8 *) (&GlobalData->NarrowGlyphs[Character]); | |
Attributes = GlobalData->NarrowGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING; | |
} else { | |
// | |
// Glyph is uninitialized - return an error, but hand back the glyph | |
// | |
*GlyphBuffer = (UINT8 *) (&GlobalData->NarrowGlyphs[Character]); | |
*Index = (UINT16) (Location + 1); | |
return EFI_NOT_FOUND; | |
} | |
} else { | |
// | |
// Wide character | |
// | |
if (GlobalData->WideGlyphs[Character].UnicodeWeight != 0x0000) { | |
*GlyphBuffer = (UINT8 *) (&GlobalData->WideGlyphs[Character]); | |
Attributes = GlobalData->WideGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING; | |
} else { | |
// | |
// Glyph is uninitialized - return an error, but hand back the glyph | |
// | |
*GlyphBuffer = (UINT8 *) (&GlobalData->WideGlyphs[Character]); | |
*Index = (UINT16) (Location + 1); | |
return EFI_NOT_FOUND; | |
} | |
} | |
// | |
// This is a non-spacing character. It will be followed by either more non-spacing | |
// characters or a regular character. We need to OR together the data associated with each. | |
// | |
for (; Attributes != 0; Location++) { | |
// | |
// Character is the Unicode value which is the index into the Glyph array. | |
// | |
Character = Source[Location]; | |
if (Narrow) { | |
for (Value = 0; Value != Count; Value++) { | |
*GlyphBuffer[Location + Value] |= GlobalData->NarrowGlyphs[Character].GlyphCol1[Value]; | |
} | |
Attributes = GlobalData->NarrowGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING; | |
} else { | |
for (Value = 0; Value != Count; Value++) { | |
*GlyphBuffer[Location + Value] |= GlobalData->WideGlyphs[Character].GlyphCol1[Value]; | |
*GlyphBuffer[Location + Value + Count] |= GlobalData->WideGlyphs[Character].GlyphCol2[Value]; | |
} | |
Attributes = GlobalData->WideGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING; | |
} | |
} | |
// | |
// Source[*Index] should point to the next character to process | |
// | |
*Index = (UINT16) (Location + 1); | |
return EFI_SUCCESS; | |
} | |
EFI_STATUS | |
EFIAPI | |
HiiGlyphToBlt ( | |
IN EFI_HII_PROTOCOL *This, | |
IN UINT8 *GlyphBuffer, | |
IN EFI_UGA_PIXEL Foreground, | |
IN EFI_UGA_PIXEL Background, | |
IN UINTN Count, | |
IN UINTN Width, | |
IN UINTN Height, | |
IN OUT EFI_UGA_PIXEL *BltBuffer | |
) | |
{ | |
UINTN X; | |
UINTN Y; | |
// | |
// Convert Monochrome bitmap of the Glyph to BltBuffer structure | |
// | |
for (Y = 0; Y < Height; Y++) { | |
for (X = 0; X < Width; X++) { | |
if ((((EFI_NARROW_GLYPH *) GlyphBuffer)->GlyphCol1[Y] & (1 << X)) != 0) { | |
BltBuffer[Y * Width * Count + (Width - X - 1)] = Foreground; | |
} else { | |
BltBuffer[Y * Width * Count + (Width - X - 1)] = Background; | |
} | |
} | |
} | |
return EFI_SUCCESS; | |
} |