gecko-dev/gfx/2d/ScaledFontDWrite.cpp

68 строки
2.0 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ScaledFontDWrite.h"
#include "PathD2D.h"
#include "Logging.h"
#include <vector>
namespace mozilla {
namespace gfx {
TemporaryRef<Path>
ScaledFontDWrite::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
{
if (aTarget->GetType() != BACKEND_DIRECT2D) {
// For now we only support Direct2D.
gfxWarning() << "Attempt to use Direct Write font with non-Direct2D backend";
return nullptr;
}
RefPtr<PathBuilder> pathBuilder = aTarget->CreatePathBuilder();
PathBuilderD2D *pathBuilderD2D =
static_cast<PathBuilderD2D*>(pathBuilder.get());
CopyGlyphsToSink(aBuffer, pathBuilderD2D->GetSink());
return pathBuilder->Finish();
}
void
ScaledFontDWrite::CopyGlyphsToBuilder(const GlyphBuffer &aBuffer, PathBuilder *aBuilder)
{
// XXX - Check path builder type!
PathBuilderD2D *pathBuilderD2D =
static_cast<PathBuilderD2D*>(aBuilder);
CopyGlyphsToSink(aBuffer, pathBuilderD2D->GetSink());
}
void
ScaledFontDWrite::CopyGlyphsToSink(const GlyphBuffer &aBuffer, ID2D1GeometrySink *aSink)
{
std::vector<UINT16> indices;
std::vector<FLOAT> advances;
std::vector<DWRITE_GLYPH_OFFSET> offsets;
indices.resize(aBuffer.mNumGlyphs);
advances.resize(aBuffer.mNumGlyphs);
offsets.resize(aBuffer.mNumGlyphs);
memset(&advances.front(), 0, sizeof(FLOAT) * aBuffer.mNumGlyphs);
for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
indices[i] = aBuffer.mGlyphs[i].mIndex;
offsets[i].advanceOffset = aBuffer.mGlyphs[i].mPosition.x;
offsets[i].ascenderOffset = -aBuffer.mGlyphs[i].mPosition.y;
}
mFontFace->GetGlyphRunOutline(mSize, &indices.front(), &advances.front(),
&offsets.front(), aBuffer.mNumGlyphs,
FALSE, FALSE, aSink);
}
}
}