GlyphPageTreeNodeCairoWin.cpp   [plain text]


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#include "config.h"
#include "GlyphPage.h"

#include "Font.h"
#include "HWndDC.h"

namespace WebCore {

bool GlyphPage::fill(UChar* buffer, unsigned bufferLength)
{
    // bufferLength will be greater than the requested number of glyphs if the buffer contains surrogate pairs.
    // We won't support this for now.
    if (bufferLength > GlyphPage::size)
        return false;

    const Font& font = this->font();
    bool haveGlyphs = false;

    HWndDC dc(0);
    SaveDC(dc);
    SelectObject(dc, font.platformData().hfont());

    WORD localGlyphBuffer[GlyphPage::size * 2];
    DWORD result = GetGlyphIndices(dc, buffer, bufferLength, localGlyphBuffer, GGI_MARK_NONEXISTING_GLYPHS);
    bool success = result != GDI_ERROR && static_cast<unsigned>(result) == bufferLength;
    if (success) {
        for (unsigned i = 0; i < GlyphPage::size; i++) {
            Glyph glyph = localGlyphBuffer[i];
            if (glyph == 0xffff)
                setGlyphForIndex(i, 0);
            else {
                setGlyphForIndex(i, glyph);
                haveGlyphs = true;
            }
        }
    }
    RestoreDC(dc, -1);

    return haveGlyphs;
}

}