1cc8ee7861
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2313 6f19259b-4bc3-4df7-8a09-765794883524
267 lines
8.0 KiB
C
267 lines
8.0 KiB
C
/*++
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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Fonts.c
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Abstract:
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This file contains the Glyph/Font processing code to the HII database.
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--*/
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#include "HiiDatabase.h"
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//
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// We only need to define a wide glyph, since we will seed the narrow glyph with EFI_NARROW_GLYPH size of
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// this data structure
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//
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UINT8 mUnknownGlyph[38] = {
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xAA,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xaa,
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0x55,
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0xAA
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};
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EFI_STATUS
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EFIAPI
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HiiGetGlyph (
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IN EFI_HII_PROTOCOL *This,
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IN CHAR16 *Source,
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IN OUT UINT16 *Index,
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OUT UINT8 **GlyphBuffer,
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OUT UINT16 *BitWidth,
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IN OUT UINT32 *InternalStatus
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)
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/*++
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Routine Description:
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Translates a Unicode character into the corresponding font glyph.
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If the Source was pointing to a non-spacing character, the next Source[*Index]
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character will be parsed and OR'd to the GlyphBuffer until a spacing character
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is found in the Source. Since non-spacing characters are considered to be the
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same pixel width as a regular character their BitWidth will be reflected correctly
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however due to their special attribute, they are considered to be zero advancing width.
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This basically means that the cursor would not advance, thus the character that follows
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it would overlay the non-spacing character. The Index is modified to reflect both the
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incoming array entry into the Source string but also the outgoing array entry after having
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parsed the equivalent of a single Glyph's worth of data.
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Arguments:
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Returns:
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--*/
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{
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EFI_HII_GLOBAL_DATA *GlobalData;
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EFI_HII_DATA *HiiData;
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UINTN Count;
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BOOLEAN Narrow;
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UINTN Location;
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UINTN SearchLocation;
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UINTN Value;
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CHAR16 Character;
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UINTN Attributes;
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if (This == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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HiiData = EFI_HII_DATA_FROM_THIS (This);
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GlobalData = HiiData->GlobalData;
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Count = sizeof (GlobalData->NarrowGlyphs->GlyphCol1);
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Location = *Index;
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SearchLocation = *Index;
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Narrow = TRUE;
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if (Source[Location] == NARROW_CHAR || Source[Location] == WIDE_CHAR) {
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*InternalStatus = 0;
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}
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//
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// We don't know what glyph database to look in - let's figure it out
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//
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if (*InternalStatus == 0) {
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//
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// Determine if we are looking for narrow or wide glyph data
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//
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do {
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if (Source[SearchLocation] == NARROW_CHAR || Source[SearchLocation] == WIDE_CHAR) {
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//
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// We found something that identifies what glyph database to look in
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//
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if (Source[SearchLocation] == WIDE_CHAR) {
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Narrow = FALSE;
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*BitWidth = WIDE_WIDTH;
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*InternalStatus = WIDE_CHAR;
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Location++;
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break;
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} else {
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Narrow = TRUE;
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*BitWidth = NARROW_WIDTH;
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*InternalStatus = NARROW_CHAR;
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Location++;
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break;
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}
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}
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} while (SearchLocation-- > 0);
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}
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if (*InternalStatus == NARROW_CHAR) {
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Narrow = TRUE;
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*BitWidth = NARROW_WIDTH;
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} else if (*InternalStatus == WIDE_CHAR) {
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Narrow = FALSE;
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*BitWidth = WIDE_WIDTH;
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} else {
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//
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// Without otherwise knowing what the width is narrow (e.g. someone passed in a string with index of 0
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// we wouldn't be able to determine the width of the data.)
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// BUGBUG - do we go to wide database and if exist, ignore narrow? Check Unicode spec....
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//
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Narrow = TRUE;
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*BitWidth = NARROW_WIDTH;
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}
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Character = Source[Location];
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if (Narrow) {
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if (GlobalData->NarrowGlyphs[Character].UnicodeWeight != 0x0000) {
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*GlyphBuffer = (UINT8 *) (&GlobalData->NarrowGlyphs[Character]);
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Attributes = GlobalData->NarrowGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING;
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} else {
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//
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// Glyph is uninitialized - return an error, but hand back the glyph
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//
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*GlyphBuffer = (UINT8 *) (&GlobalData->NarrowGlyphs[Character]);
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*Index = (UINT16) (Location + 1);
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return EFI_NOT_FOUND;
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}
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} else {
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//
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// Wide character
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//
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if (GlobalData->WideGlyphs[Character].UnicodeWeight != 0x0000) {
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*GlyphBuffer = (UINT8 *) (&GlobalData->WideGlyphs[Character]);
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Attributes = GlobalData->WideGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING;
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} else {
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//
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// Glyph is uninitialized - return an error, but hand back the glyph
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//
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*GlyphBuffer = (UINT8 *) (&GlobalData->WideGlyphs[Character]);
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*Index = (UINT16) (Location + 1);
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return EFI_NOT_FOUND;
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}
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}
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//
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// This is a non-spacing character. It will be followed by either more non-spacing
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// characters or a regular character. We need to OR together the data associated with each.
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//
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for (; Attributes != 0; Location++) {
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//
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// Character is the Unicode value which is the index into the Glyph array.
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//
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Character = Source[Location];
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if (Narrow) {
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for (Value = 0; Value != Count; Value++) {
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*GlyphBuffer[Location + Value] = (UINT8) (*GlyphBuffer[Location + Value] |
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GlobalData->NarrowGlyphs[Character].GlyphCol1[Value]);
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}
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Attributes = GlobalData->NarrowGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING;
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} else {
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for (Value = 0; Value != Count; Value++) {
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*GlyphBuffer[Location + Value] = (UINT8) (*GlyphBuffer[Location + Value] |
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GlobalData->WideGlyphs[Character].GlyphCol1[Value]);
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*GlyphBuffer[Location + Value + Count] = (UINT8) (*GlyphBuffer[Location + Value + Count] |
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GlobalData->WideGlyphs[Character].GlyphCol2[Value]);
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}
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Attributes = GlobalData->WideGlyphs[Character].Attributes & EFI_GLYPH_NON_SPACING;
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}
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}
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//
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// Source[*Index] should point to the next character to process
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//
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*Index = (UINT16) (Location + 1);
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return EFI_SUCCESS;
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}
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EFI_STATUS
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EFIAPI
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HiiGlyphToBlt (
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IN EFI_HII_PROTOCOL *This,
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IN UINT8 *GlyphBuffer,
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IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL Foreground,
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IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL Background,
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IN UINTN Count,
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IN UINTN Width,
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IN UINTN Height,
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IN OUT EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer
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)
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{
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UINTN X;
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UINTN Y;
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//
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// Convert Monochrome bitmap of the Glyph to BltBuffer structure
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//
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for (Y = 0; Y < Height; Y++) {
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for (X = 0; X < Width; X++) {
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if ((((EFI_NARROW_GLYPH *) GlyphBuffer)->GlyphCol1[Y] & (1 << X)) != 0) {
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BltBuffer[Y * Width * Count + (Width - X - 1)] = Foreground;
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} else {
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BltBuffer[Y * Width * Count + (Width - X - 1)] = Background;
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}
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}
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}
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return EFI_SUCCESS;
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}
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