gecko/gfx/2d/ScaledFontCairo.cpp
Joe Drew 8cc05dbabc Bug 715513 - Implement text in the new 2D API's Cairo backend. r=jrmuizel
--HG--
extra : rebase_source : 75350d02ec31e60c356b1d9f05bf14b2b2dee9f4
2012-01-10 13:26:59 -05:00

98 lines
3.1 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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#include "ScaledFontCairo.h"
#include "cairo.h"
#include "PathCairo.h"
#include "gfxFont.h"
#include <vector>
using namespace std;
namespace mozilla {
namespace gfx {
ScaledFontCairo::ScaledFontCairo(gfxFont* aFont)
{
mScaledFont = aFont->GetCairoScaledFont();
cairo_scaled_font_reference(mScaledFont);
}
ScaledFontCairo::~ScaledFontCairo()
{
cairo_scaled_font_destroy(mScaledFont);
}
TemporaryRef<Path>
ScaledFontCairo::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
{
if (aTarget->GetType() != BACKEND_CAIRO) {
return NULL;
}
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();
}
cairo_scaled_font_t*
ScaledFontCairo::GetCairoScaledFont()
{
return mScaledFont;
}
}
}