foncache.c

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/*++

Copyright (c) 1985 - 1999, Microsoft Corporation

Module Name:

    foncache.c

Abstract:

        This file is EUDC font cache

Author:

    Kazuhiko  Matsubara  21-June-1994

Revision History:

Notes:

--*/

#include "precomp.h"
#pragma hdrstop

#if defined(FE_SB)


VOID
RebaseFontImageList(
    IN PFONT_IMAGE NewFontImage,
    IN PBYTE OldFontImage
    )
{
    PLIST_ENTRY ImageList;
    PBYTE BaseImage = (PBYTE)NewFontImage;

    do {
        ImageList = &NewFontImage->ImageList;
        if (ImageList->Blink)
            ImageList->Blink = (PLIST_ENTRY)((PBYTE)ImageList->Blink - OldFontImage + BaseImage);
        if (ImageList->Flink)
            ImageList->Flink = (PLIST_ENTRY)((PBYTE)ImageList->Flink - OldFontImage + BaseImage);
    } while (NewFontImage = (PFONT_IMAGE)ImageList->Flink);
}





ULONG
CreateFontCache(
    OUT PFONT_CACHE_INFORMATION *FontCache
    )
{
    //
    // allocate font cache data
    //

    *FontCache = ConsoleHeapAlloc(HEAP_ZERO_MEMORY,sizeof(FONT_CACHE_INFORMATION));
    if (*FontCache == NULL) {
        return (ULONG)STATUS_NO_MEMORY;
    }

    return (ULONG)(STATUS_SUCCESS);
}


ULONG
DestroyFontCache(
    IN PFONT_CACHE_INFORMATION FontCache
    )
{
    if (FontCache != NULL)
    {
        PFONT_HIGHLOW_OFFSET FontOffsetHighLow;
        PFONT_LOW_OFFSET     FontOffsetLow;
        PFONT_IMAGE          FontImage;
        UINT i, j, k;

        for (i=0;
             i < sizeof(FontCache->FontTable.FontOffsetHighHigh)/sizeof(PFONT_HIGHLOW_OFFSET);
             i++)
        {
            if (FontOffsetHighLow = FontCache->FontTable.FontOffsetHighHigh[i])
            {
                for (j=0;
                     j < sizeof(FontOffsetHighLow->FontOffsetHighLow)/sizeof(PFONT_LOW_OFFSET);
                     j++)
                {
                    if (FontOffsetLow = FontOffsetHighLow->FontOffsetHighLow[j])
                    {
                        for (k=0;
                             k < sizeof(FontOffsetLow->FontOffsetLow)/sizeof(PFONT_IMAGE);
                             k++)
                        {
                            if (FontImage = FontOffsetLow->FontOffsetLow[k])
                            {
                                ConsoleHeapFree(FontImage);
                            }
                        }
                        ConsoleHeapFree(FontOffsetLow);
                    }
                }
                ConsoleHeapFree(FontOffsetHighLow);
            }
        }
        if (FontCache->BaseImageBits) {
            ConsoleHeapFree(FontCache->BaseImageBits);
        }
        ConsoleHeapFree(FontCache);
    }
    return (ULONG)(STATUS_SUCCESS);
}

ULONG
RebaseFontCache(
    IN PFONT_CACHE_INFORMATION FontCache,
    IN PBYTE OldBaseImage
    )
{
    if (FontCache != NULL)
    {
        PFONT_HIGHLOW_OFFSET FontOffsetHighLow;
        PFONT_LOW_OFFSET     FontOffsetLow;
        PFONT_IMAGE          FontImage;
        UINT i, j, k;

        for (i=0;
             i < sizeof(FontCache->FontTable.FontOffsetHighHigh)/sizeof(PFONT_HIGHLOW_OFFSET);
             i++)
        {
            if (FontOffsetHighLow = FontCache->FontTable.FontOffsetHighHigh[i])
            {
                for (j=0;
                     j < sizeof(FontOffsetHighLow->FontOffsetHighLow)/sizeof(PFONT_LOW_OFFSET);
                     j++)
                {
                    if (FontOffsetLow = FontOffsetHighLow->FontOffsetHighLow[j])
                    {
                        for (k=0;
                             k < sizeof(FontOffsetLow->FontOffsetLow)/sizeof(PFONT_IMAGE);
                             k++)
                        {
                            if (FontImage = FontOffsetLow->FontOffsetLow[k])
                            {
                                LIST_ENTRY ImageList;

                                do {
                                    ImageList = FontImage->ImageList;
                                    if (FontImage->ImageBits) {
                                        FontImage->ImageBits = FontImage->ImageBits - OldBaseImage
                                                               + FontCache->BaseImageBits;
                                    }
                                } while (FontImage = (PFONT_IMAGE)ImageList.Flink);
                            }
                        }
                    }
                }
            }
        }
    }
    return (ULONG)(STATUS_SUCCESS);
}



#define CALC_BITMAP_BITS_FOR_X( FontSizeX, dwAlign ) \
    ( ( ( FontSizeX * BITMAP_BITS_PIXEL + (dwAlign-1) ) & ~(dwAlign-1)) >> BITMAP_ARRAY_BYTE )




DWORD
CalcBitmapBufferSize(
    IN COORD FontSize,
    IN DWORD dwAlign
    )
{
    DWORD uiCount;

    uiCount = CALC_BITMAP_BITS_FOR_X(FontSize.X,
                                     (dwAlign==BYTE_ALIGN ? BITMAP_BITS_BYTE_ALIGN : BITMAP_BITS_WORD_ALIGN));
    uiCount = uiCount * BITMAP_PLANES * FontSize.Y;
    return uiCount;
}

VOID
AlignCopyMemory(
    OUT PBYTE pDestBits,
    IN DWORD dwDestAlign,
    IN PBYTE pSrcBits,
    IN DWORD dwSrcAlign,
    IN COORD FontSize
    )
{
    DWORD dwDestBufferSize;
    COORD coord;

    if (dwDestAlign == dwSrcAlign) {
        dwDestBufferSize = CalcBitmapBufferSize(FontSize, dwDestAlign);
        RtlCopyMemory(pDestBits, pSrcBits, dwDestBufferSize);
        return;
    }

    switch (dwDestAlign) {
        default:
        case WORD_ALIGN:
            switch (dwSrcAlign) {
                default:
                //
                // pDest = WORD, pSrc = WORD
                //
                case WORD_ALIGN:
                    dwDestBufferSize = CalcBitmapBufferSize(FontSize, dwDestAlign);
                    RtlCopyMemory(pDestBits, pSrcBits, dwDestBufferSize);
                    break;
                //
                // pDest = WORD, pSrc = BYTE
                //
                case BYTE_ALIGN:
                    dwDestBufferSize = CalcBitmapBufferSize(FontSize, dwDestAlign);
                    if (((FontSize.X % BITMAP_BITS_BYTE_ALIGN) == 0) &&
                        ((FontSize.X % BITMAP_BITS_WORD_ALIGN) == 0)   ) {
                        RtlCopyMemory(pDestBits, pSrcBits, dwDestBufferSize);
                    }
                    else {
                        RtlZeroMemory(pDestBits, dwDestBufferSize);
                        for (coord.Y=0; coord.Y < FontSize.Y; coord.Y++) {
                            for (coord.X=0;
                                 coord.X < CALC_BITMAP_BITS_FOR_X(FontSize.X, BITMAP_BITS_BYTE_ALIGN);
                                 coord.X++) {
                                *pDestBits++ = *pSrcBits++;
                            }
                            if (CALC_BITMAP_BITS_FOR_X(FontSize.X, BITMAP_BITS_BYTE_ALIGN) & 1)
                                pDestBits++;
                        }
                    }
                    break;
            }
            break;
        case BYTE_ALIGN:
            switch (dwSrcAlign) {
                //
                // pDest = BYTE, pSrc = BYTE
                //
                case BYTE_ALIGN:
                    dwDestBufferSize = CalcBitmapBufferSize(FontSize, dwDestAlign);
                    RtlCopyMemory(pDestBits, pSrcBits, dwDestBufferSize);
                    break;
                default:
                //
                // pDest = BYTE, pSrc = WORD
                //
                case WORD_ALIGN:
                    dwDestBufferSize = CalcBitmapBufferSize(FontSize, dwDestAlign);
                    if (((FontSize.X % BITMAP_BITS_BYTE_ALIGN) == 0) &&
                        ((FontSize.X % BITMAP_BITS_WORD_ALIGN) == 0)   ) {
                        RtlCopyMemory(pDestBits, pSrcBits, dwDestBufferSize);
                    }
                    else {
                        RtlZeroMemory(pDestBits, dwDestBufferSize);
                        for (coord.Y=0; coord.Y < FontSize.Y; coord.Y++) {
                            for (coord.X=0;
                                 coord.X < CALC_BITMAP_BITS_FOR_X(FontSize.X, BITMAP_BITS_BYTE_ALIGN);
                                 coord.X++) {
                                *pDestBits++ = *pSrcBits++;
                            }
                            if (CALC_BITMAP_BITS_FOR_X(FontSize.X, BITMAP_BITS_BYTE_ALIGN) & 1)
                                pSrcBits++;
                        }
                    }
                    break;
            }
            break;
    }
}



NTSTATUS
GetStretchImage(
    IN COORD FontSize,
    IN PFONT_IMAGE FontImage,
    OUT PFONT_IMAGE *pFontImage
    )
{
    PFONT_IMAGE NearFont;
    DWORD Find;
    COORD FontDelta;
    HDC hDC;
    HDC hSrcMemDC, hDestMemDC;
    HBITMAP hSrcBmp, hDestBmp;
    DWORD BufferSize;

    Find = (DWORD)-1;
    NearFont = NULL;
    do {
        FontDelta.X = abs(FontSize.X - FontImage->FontSize.X);
        FontDelta.Y = abs(FontSize.Y - FontImage->FontSize.Y);
        if (Find > (DWORD)(FontDelta.X + FontDelta.Y))
        {
            Find = (DWORD)(FontDelta.X + FontDelta.Y);
            NearFont = FontImage;
        }
    }
    while (FontImage = (PFONT_IMAGE)FontImage->ImageList.Flink);

    if (NearFont == NULL)
        return STATUS_ACCESS_DENIED;

    hDC = CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL);

    hSrcMemDC  = CreateCompatibleDC(hDC);
    hDestMemDC = CreateCompatibleDC(hDC);

    hSrcBmp  = CreateBitmap(NearFont->FontSize.X,
                            NearFont->FontSize.Y,
                            BITMAP_PLANES, BITMAP_BITS_PIXEL,
                            NearFont->ImageBits);
    hDestBmp = CreateBitmap(FontSize.X,
                            FontSize.Y,
                            BITMAP_PLANES, BITMAP_BITS_PIXEL,
                            NULL);

    SelectObject(hSrcMemDC,  hSrcBmp);
    SelectObject(hDestMemDC, hDestBmp);

    if (! StretchBlt(hDestMemDC, 0, 0, FontSize.X, FontSize.Y,
                     hSrcMemDC,  0, 0, NearFont->FontSize.X, NearFont->FontSize.Y,
                     SRCCOPY)) {
        return GetLastError();
    }

    BufferSize = CalcBitmapBufferSize(FontSize, WORD_ALIGN);
    GetBitmapBits(hDestBmp, BufferSize, (*pFontImage)->ImageBits);

    DeleteDC(hSrcMemDC);
    DeleteDC(hDestMemDC);
    DeleteObject(hSrcBmp);
    DeleteObject(hDestBmp);
    DeleteDC(hDC);

    return STATUS_SUCCESS;
}



NTSTATUS
GetFontImageInternal(
    IN PFONT_CACHE_INFORMATION FontCache,
    IN WCHAR wChar,
    IN COORD FontSize,
    OUT PFONT_IMAGE *pFontImage,
    IN DWORD GetFlag
    )
{
    PFONT_HIGHLOW_OFFSET FontOffsetHighLow;
    PFONT_LOW_OFFSET     FontOffsetLow;
    PFONT_IMAGE          FontImage;
    WORD  HighHighIndex, HighLowIndex;
    WORD  LowIndex;
    DWORD Flag;

    HighHighIndex = (HIBYTE(wChar)) >> 4;
    HighLowIndex  = (HIBYTE(wChar)) & 0x0f;
    LowIndex      = LOBYTE(wChar);

    FontOffsetHighLow = FontCache->FontTable.FontOffsetHighHigh[HighHighIndex];
    if (FontOffsetHighLow == NULL)
        return STATUS_ACCESS_DENIED;

    FontOffsetLow = FontOffsetHighLow->FontOffsetHighLow[HighLowIndex];
    if (FontOffsetLow == NULL)
        return STATUS_ACCESS_DENIED;

    FontImage = FontOffsetLow->FontOffsetLow[LowIndex];
    if (FontImage == NULL)
        return STATUS_ACCESS_DENIED;


    Flag = ADD_IMAGE;
    do {
        if (FontImage->FontSize.X == FontSize.X &&
            FontImage->FontSize.Y == FontSize.Y   ) {
            //
            // Replace font image
            //
            Flag = REPLACE_IMAGE;
            break;
        }
    }
    while (FontImage = (PFONT_IMAGE)FontImage->ImageList.Flink);

    switch (GetFlag)
    {
        //
        // Get matched size font.
        //
        case FONT_MATCHED:
            if (Flag != REPLACE_IMAGE)
                return STATUS_ACCESS_DENIED;

            *pFontImage = FontImage;
            break;

        //
        // Get stretched size font.
        //
        case FONT_STRETCHED:
            if (Flag == REPLACE_IMAGE &&
                FontImage->ImageBits != NULL) {

                *pFontImage = FontImage;

            }
            else {
                GetStretchImage(FontSize,
                                FontOffsetLow->FontOffsetLow[LowIndex],
                                pFontImage
                               );
            }
            break;
    }

    return STATUS_SUCCESS;
}

//
// See Raid #362907, stress failure
//

VOID UnlinkAndShrinkFontImagesByOne(
    PFONT_IMAGE* ppFontImage,
    PFONT_IMAGE pFontImageRemove)
{
    PFONT_IMAGE OldFontImage = *ppFontImage;
    SIZE_T OldFontSize = ConsoleHeapSize(OldFontImage);
    PFONT_IMAGE NewFontImage;

    RIPMSG0(RIP_WARNING, "UnlinkAndShrinkFontImagesByOne entered.");

    if (OldFontImage== NULL) {
        RIPMSG0(RIP_ERROR, "UnlinkAndShrinkFontImagesByOne: *ppFontImage is NULL.");
        //
        // There's nothing to shrink.
        //
        return;
    }

    if (OldFontImage == pFontImageRemove) {
        RIPMSG0(RIP_WARNING, "UnlinkAndShrinkFontImagesByOne: unshrinking just one element.");
        //
        // There's just one entry. Let's free it and set
        // ppFontImage as NULL, and bail out.
        //
        UserAssert(OldFontSize < sizeof(FONT_IMAGE) * 2);

        *ppFontImage = NULL;
        ConsoleHeapFree(OldFontImage);
        return;
    }

#if DBG
    //
    // Double check the integrity of the linked list.
    //
    {
        PFONT_IMAGE FontImageTmp;

        //
        // Search the tail element
        //
        for (FontImageTmp = OldFontImage; FontImageTmp->ImageList.Flink; FontImageTmp = (PFONT_IMAGE)FontImageTmp->ImageList.Flink)
            ;

        UserAssert(FontImageTmp == pFontImageRemove);
    }
#endif

    //
    // Remove the tail element
    //
    pFontImageRemove->ImageList.Blink->Flink = NULL;

    //
    // Shrink the contiguous memory chunk
    //
    // Note: this code assumes sizeof(FONT_IMAGE) is larger than
    // HEAP_GRANULARITY. If not, the heap block actually does not
    // shrink, and the assert below will hit.
    //
    NewFontImage = ConsoleHeapReAlloc(HEAP_ZERO_MEMORY,
                               OldFontImage,
                               OldFontSize - sizeof(FONT_IMAGE));
    if (NewFontImage == NULL) {
        //
        // Win32HeapRealloc firstly allocates a new memory and then
        // copies the content. If the allocation fails, it leaves the
        // original heap as is.
        //
        // Even though the realloc fails, the last element (pFontImageRemove) is
        // already removed from the linked list. The next time SetImageFontInternal
        // is called, a new FontImage might be added to this memory chunk, but the
        // the code always links the newly extended memory.
        // This leaves the sizeof(FONT_IMAGE) memory unused, but it's safe. Assuming
        // sizeof(FONT_IMAGE) is small, memory waste should be minimum.
        //
        // It's OK for us to just bail out here.
        //
        RIPMSG0(RIP_WARNING, "UnlinkAndShrinkFontImagesByOne: failed to shrink ppFontImage.");
        return;
    }
    UserAssert(ConsoleHeapSize(NewFontImage) != OldFontSize);

    if (NewFontImage != OldFontImage) {
        //
        // Rebase Font Image Linked List
        //
        RebaseFontImageList(NewFontImage, (PBYTE)OldFontImage);
        *ppFontImage = NewFontImage;
    }
}

NTSTATUS
SetFontImageInternal(
    IN PFONT_CACHE_INFORMATION FontCache,
    IN WCHAR wChar,
    IN COORD FontSize,
    IN DWORD dwAlign,
    IN CONST VOID *ImageBits
    )
{
    PFONT_HIGHLOW_OFFSET FontOffsetHighLow;
    PFONT_LOW_OFFSET     FontOffsetLow;
    PFONT_IMAGE          FontImage;
    PFONT_IMAGE          FontImageTmp;
    WORD  HighHighIndex, HighLowIndex;
    WORD  LowIndex;
    DWORD Flag;
    DWORD BufferSize;

    HighHighIndex = (HIBYTE(wChar)) >> 4;
    HighLowIndex  = (HIBYTE(wChar)) & 0x0f;
    LowIndex      = LOBYTE(wChar);

    /*
     * When Console is being destroyed, all font cache information
     * will be freed (see DestroyFontCache), so no memory leak
     * is expected on those, even if we cleanup everything on
     * error return...
     */

    FontOffsetHighLow = FontCache->FontTable.FontOffsetHighHigh[HighHighIndex];
    if (FontOffsetHighLow == NULL) {
        FontOffsetHighLow = ConsoleHeapAlloc( HEAP_ZERO_MEMORY, sizeof(FONT_HIGHLOW_OFFSET));
        if (FontOffsetHighLow == NULL) {
            RIPMSG1(RIP_WARNING, "SetFontImageInternal: cannot allocate memory (%d bytes)",
                      sizeof(FONT_HIGHLOW_OFFSET));
            return STATUS_NO_MEMORY;
        }

        FontCache->FontTable.FontOffsetHighHigh[HighHighIndex] = FontOffsetHighLow;
    }

    FontOffsetLow = FontOffsetHighLow->FontOffsetHighLow[HighLowIndex];
    if (FontOffsetLow == NULL) {
        FontOffsetLow = ConsoleHeapAlloc( HEAP_ZERO_MEMORY, sizeof(FONT_LOW_OFFSET));
        if (FontOffsetLow == NULL) {
            RIPMSG0(RIP_WARNING, "SetFontImageInternal: failed to allocate FontOffsetLow.");
            return STATUS_NO_MEMORY;
        }

        FontOffsetHighLow->FontOffsetHighLow[HighLowIndex] = FontOffsetLow;
    }

    FontImage = FontOffsetLow->FontOffsetLow[LowIndex];
    if (FontImage == NULL) {
        FontImage = ConsoleHeapAlloc( HEAP_ZERO_MEMORY, sizeof(FONT_IMAGE));
        if (FontImage == NULL) {
            RIPMSG0(RIP_WARNING, "SetFontImageInternal: failed to allocate FontImage");
            return STATUS_NO_MEMORY;
        }
    }

    if (FontSize.X == 0 &&
        FontSize.Y == 0   ) {
        //
        // Reset registered font
        //
        if (FontImage != NULL)
        {
            ConsoleHeapFree(FontImage);
            FontOffsetLow->FontOffsetLow[LowIndex] = NULL;
        }
        return STATUS_SUCCESS;
    }

    Flag = ADD_IMAGE;
    FontImageTmp = FontImage;
    do {
        if (FontImageTmp->FontSize.X == FontSize.X &&
            FontImageTmp->FontSize.Y == FontSize.Y   ) {
            //
            // Replace font image
            //
            Flag = REPLACE_IMAGE;
            FontImage = FontImageTmp;
            break;
        }
    }
    while (FontImageTmp = (PFONT_IMAGE)FontImageTmp->ImageList.Flink);

    switch (Flag) {
        case ADD_IMAGE:
            if (FontOffsetLow->FontOffsetLow[LowIndex] != NULL)
            {
                PFONT_IMAGE OldFontImage = FontOffsetLow->FontOffsetLow[LowIndex];
                SIZE_T OldFontSize = ConsoleHeapSize(OldFontImage);
                PFONT_IMAGE NewFontImage;

                NewFontImage = ConsoleHeapReAlloc(HEAP_ZERO_MEMORY,
                                           OldFontImage,
                                           OldFontSize + sizeof(FONT_IMAGE));
                if (NewFontImage == NULL) {
                    RIPMSG0(RIP_WARNING, "SetFontImageInternal: failed to allocate NewFontImage");
                    return STATUS_NO_MEMORY;
                }

                FontOffsetLow->FontOffsetLow[LowIndex] = NewFontImage;

                // Rebase Font Image List
                RebaseFontImageList(NewFontImage, (PBYTE)OldFontImage);

                NewFontImage = (PFONT_IMAGE)((PBYTE)NewFontImage + OldFontSize);

                NewFontImage->FontSize = FontSize;

                //
                // Connect link list.
                //
                (NewFontImage-1)->ImageList.Flink = (PLIST_ENTRY)NewFontImage;
                NewFontImage->ImageList.Blink = (PLIST_ENTRY)(NewFontImage-1);

                FontImage = NewFontImage;
            }
            else
            {
                FontImage->FontSize = FontSize;
                FontOffsetLow->FontOffsetLow[LowIndex] = FontImage;
            }

            //
            // Allocate Image Buffer
            //
            BufferSize = CalcBitmapBufferSize(FontSize,WORD_ALIGN);

            if (FontCache->BaseImageBits == NULL)
            {
                FontCache->BaseImageBits = ConsoleHeapAlloc( HEAP_ZERO_MEMORY, BufferSize);
                if (FontCache->BaseImageBits == NULL) {
                    RIPMSG0(RIP_WARNING, "SetFontImageInternal: failed to allocate FontCache->BaseImageBits");
                    UnlinkAndShrinkFontImagesByOne(&FontOffsetLow->FontOffsetLow[LowIndex], FontImage);
                    return STATUS_NO_MEMORY;
                }

                FontImage->ImageBits = FontCache->BaseImageBits;
            }
            else
            {
                PBYTE OldBaseImage = FontCache->BaseImageBits;
                SIZE_T OldImageSize = ConsoleHeapSize(OldBaseImage);
                FontCache->BaseImageBits = ConsoleHeapReAlloc(HEAP_ZERO_MEMORY,
                                                       OldBaseImage,
                                                       OldImageSize + BufferSize);
                if (FontCache->BaseImageBits == NULL) {
                    RIPMSG0(RIP_WARNING, "SetFontImageInternal: failed to reallocate FontCache->BaseImageBits");
                    //
                    // When reallocation fails, we preserve the old baseImageBits
                    // so that other FontImage->ImageBits can be still valid.
                    //
                    FontCache->BaseImageBits = OldBaseImage;
                    //
                    // Remove the tail element that we failed to add image.
                    //
                    UnlinkAndShrinkFontImagesByOne(&FontOffsetLow->FontOffsetLow[LowIndex], FontImage);
                    return STATUS_NO_MEMORY;
                }

                // Rebase font image pointer
                RebaseFontCache(FontCache, OldBaseImage);

                FontImage->ImageBits = FontCache->BaseImageBits + OldImageSize;
            }

            AlignCopyMemory(FontImage->ImageBits,// pDestBits
                            WORD_ALIGN,          // dwDestAlign
                            (PVOID)ImageBits,    // pSrcBits
                            dwAlign,             // dwSrcAlign
                            FontSize);

            break;

        case REPLACE_IMAGE:
            if (FontImage->ImageBits == NULL) {
                RIPMSG0(RIP_WARNING, "SetFontImageInternal: FontImage->ImageBits is NULL.");
                return STATUS_NO_MEMORY;
            }

            AlignCopyMemory(FontImage->ImageBits,// pDestBits
                            WORD_ALIGN,          // dwDestAlign
                            (PVOID)ImageBits,    // pSrcBits
                            dwAlign,             // dwSrcAlign
                            FontSize);

            break;
    }

    return STATUS_SUCCESS;
}





ULONG
GetFontImage(
    IN PFONT_CACHE_INFORMATION FontCache,
    IN WCHAR wChar,
    IN COORD FontSize,
    IN DWORD dwAlign,
    OUT VOID *ImageBits
    )
{
    NTSTATUS Status;
    PFONT_IMAGE FontImage;

    if (FontSize.X == 0 &&
        FontSize.Y == 0   ) {
        return (ULONG)(STATUS_INVALID_PARAMETER);
    }

    Status = GetFontImageInternal(FontCache,wChar,FontSize,&FontImage,FONT_MATCHED);
    if (! NT_SUCCESS(Status) )
        return (ULONG)Status;

    if (FontImage->ImageBits == NULL ||
        ImageBits == NULL)
        return STATUS_SUCCESS;

    AlignCopyMemory((PVOID)ImageBits,    // pDestBits
                    dwAlign,             // dwDestAlign
                    FontImage->ImageBits,// pSrcBits
                    WORD_ALIGN,          // dwSrcAlign
                    FontSize);

    return STATUS_SUCCESS;
}

ULONG
GetStretchedFontImage(
    IN PFONT_CACHE_INFORMATION FontCache,
    IN WCHAR wChar,
    IN COORD FontSize,
    IN DWORD dwAlign,
    OUT VOID *ImageBits
    )
{
    NTSTATUS Status;
    PFONT_IMAGE FontImage;
    FONT_IMAGE  FontBuff;
    DWORD BufferSize;

    if (FontSize.X == 0 &&
        FontSize.Y == 0   ) {
        return (ULONG)(STATUS_INVALID_PARAMETER);
    }

    FontImage = &FontBuff;

    BufferSize = CalcBitmapBufferSize(FontSize,WORD_ALIGN);
    FontImage->ImageBits = ConsoleHeapAlloc( HEAP_ZERO_MEMORY, BufferSize);
    if (FontImage->ImageBits == NULL) {
        RIPMSG0(RIP_WARNING, "GetStretchedFontImage: failed to allocate FontImage->ImageBits");
        return (ULONG)STATUS_NO_MEMORY;
    }

    Status = GetFontImageInternal(FontCache,wChar,FontSize,&FontImage,FONT_STRETCHED);
    if (! NT_SUCCESS(Status) )
    {
        ConsoleHeapFree(FontBuff.ImageBits);
        return (ULONG)Status;
    }

    if (FontImage->ImageBits == NULL)
    {
        ConsoleHeapFree(FontBuff.ImageBits);
        return (ULONG)STATUS_SUCCESS;
    }

    AlignCopyMemory((PVOID)ImageBits,    // pDestBits
                    dwAlign,             // dwDestAlign
                    FontImage->ImageBits,// pSrcBits
                    WORD_ALIGN,          // dwSrcAlign
                    FontSize);

    ConsoleHeapFree(FontBuff.ImageBits);

    return (ULONG)STATUS_SUCCESS;
}

ULONG
GetFontImagePointer(
    IN PFONT_CACHE_INFORMATION FontCache,
    IN WCHAR wChar,
    IN COORD FontSize,
    OUT PFONT_IMAGE *FontImage
    )
{
    NTSTATUS Status;

    if (FontSize.X == 0 &&
        FontSize.Y == 0   ) {
        return (ULONG)(STATUS_INVALID_PARAMETER);
    }

    Status = GetFontImageInternal(FontCache,wChar,FontSize,(PFONT_IMAGE*)FontImage,FONT_MATCHED);
    if (! NT_SUCCESS(Status) )
        return (ULONG)Status;

    if ((*FontImage)->ImageBits == NULL)
        return (ULONG)STATUS_ACCESS_DENIED;

    return Status;
}

ULONG
SetFontImage(
    IN PFONT_CACHE_INFORMATION FontCache,
    IN WCHAR wChar,
    IN COORD FontSize,
    IN DWORD dwAlign,
    IN CONST VOID *ImageBits
    )
{
    return SetFontImageInternal(FontCache,wChar,FontSize,dwAlign,ImageBits);
}


NTSTATUS
GetExpandImage(
    COORD InputFontSize,
    PWORD InputFontImage,
    COORD OutputFontSize,
    PWORD OutputFontImage
    )
{
    NTSTATUS Status;
    DWORD InputRow = CALC_BITMAP_BITS_FOR_X(InputFontSize.X, BITMAP_BITS_WORD_ALIGN);
    DWORD OutputRow = CALC_BITMAP_BITS_FOR_X(OutputFontSize.X, BITMAP_BITS_WORD_ALIGN);
    DWORD InputBufferSize = CalcBitmapBufferSize(InputFontSize,WORD_ALIGN);
    DWORD OutputBufferSize = CalcBitmapBufferSize(OutputFontSize,WORD_ALIGN);

    Status = STATUS_NO_MEMORY;

    RtlZeroMemory(OutputFontImage,OutputBufferSize);

    ASSERT(InputRow==OutputRow);

    if (InputFontSize.Y < OutputFontSize.Y)
        RtlCopyMemory(OutputFontImage, InputFontImage, InputBufferSize);
    else
        RtlCopyMemory(OutputFontImage, InputFontImage, OutputBufferSize);

    return STATUS_SUCCESS;
}

NTSTATUS
GetExpandFontImage(
    PFONT_CACHE_INFORMATION FontCache,
    WCHAR wChar,
    COORD InputFontSize,
    COORD OutputFontSize,
    PWORD OutputFontImage
    )
{
    NTSTATUS Status;
    DWORD InputBufferSize;
    PWORD InputFontImage;

    if (InputFontSize.X == 0 &&
        InputFontSize.Y == 0   ) {
        return (ULONG)(STATUS_INVALID_PARAMETER);
    }

    if (OutputFontSize.X == 0 &&
        OutputFontSize.Y == 0   ) {
        return (ULONG)(STATUS_INVALID_PARAMETER);
    }

    InputBufferSize = CalcBitmapBufferSize(InputFontSize,WORD_ALIGN);
    InputFontImage = ConsoleHeapAlloc( HEAP_ZERO_MEMORY, InputBufferSize);
    if (InputFontImage==NULL)
        return STATUS_NO_MEMORY;


    Status = GetFontImage(FontCache,
                          wChar,
                          InputFontSize,
                          WORD_ALIGN,
                          InputFontImage);
    if (! NT_SUCCESS(Status) )
    {
        ConsoleHeapFree(InputFontImage);
        return Status;
    }

    Status = GetExpandImage(InputFontSize,
                            InputFontImage,
                            OutputFontSize,
                            OutputFontImage);

    ConsoleHeapFree(InputFontImage);

    return Status;
}
#endif

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