gecko/gfx/2d/ScaledFontBase.cpp

148 lines
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Matt Woodrow <mwoodrow@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "ScaledFontBase.h"
#include "gfxFont.h"
#ifdef USE_SKIA
#include "PathSkia.h"
#include "skia/SkPaint.h"
#include "skia/SkPath.h"
#endif
#ifdef USE_CAIRO
#include "PathCairo.h"
#endif
#include <vector>
#include <cmath>
using namespace std;
namespace mozilla {
namespace gfx {
ScaledFontBase::~ScaledFontBase()
{
#ifdef USE_SKIA
SkSafeUnref(mTypeface);
#endif
#ifdef USE_CAIRO
cairo_scaled_font_destroy(mScaledFont);
#endif
}
ScaledFontBase::ScaledFontBase(Float aSize)
: mSize(aSize)
{
#ifdef USE_SKIA
mTypeface = NULL;
#endif
#ifdef USE_CAIRO
mScaledFont = NULL;
#endif
}
TemporaryRef<Path>
ScaledFontBase::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
{
#ifdef USE_SKIA
if (aTarget->GetType() == BACKEND_SKIA) {
SkPaint paint;
paint.setTypeface(GetSkTypeface());
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
paint.setTextSize(SkFloatToScalar(mSize));
std::vector<uint16_t> indices;
std::vector<SkPoint> offsets;
indices.resize(aBuffer.mNumGlyphs);
offsets.resize(aBuffer.mNumGlyphs);
for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
indices[i] = aBuffer.mGlyphs[i].mIndex;
offsets[i].fX = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.x);
offsets[i].fY = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.y);
}
SkPath path;
paint.getPosTextPath(&indices.front(), aBuffer.mNumGlyphs*2, &offsets.front(), &path);
return new PathSkia(path, FILL_WINDING);
}
#endif
#ifdef USE_CAIRO
if (aTarget->GetType() == BACKEND_CAIRO) {
MOZ_ASSERT(mScaledFont);
RefPtr<PathBuilder> builder_iface = aTarget->CreatePathBuilder();
PathBuilderCairo* builder = static_cast<PathBuilderCairo*>(builder_iface.get());
// Manually build the path for the PathBuilder.
RefPtr<CairoPathContext> context = builder->GetPathContext();
cairo_set_scaled_font(*context, mScaledFont);
// Convert our GlyphBuffer into an array of Cairo glyphs.
std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
}
cairo_glyph_path(*context, &glyphs[0], aBuffer.mNumGlyphs);
return builder->Finish();
}
#endif
return NULL;
}
#ifdef USE_CAIRO
void
ScaledFontBase::SetCairoScaledFont(cairo_scaled_font_t* font)
{
MOZ_ASSERT(!mScaledFont);
mScaledFont = font;
cairo_scaled_font_reference(mScaledFont);
}
#endif
}
}