SkPath
ScaledFontBase::GetSkiaPathForGlyphs(const GlyphBuffer &aBuffer)
{
SkTypeface *typeFace = GetSkTypeface();
MOZ_ASSERT(typeFace);
SkPaint paint;
paint.setTypeface(typeFace);
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 path;
}
virtual void onDraw(SkCanvas* canvas) {
// explicitly add spaces, to test a prev. bug
const char* text = "Ham bur ge fons";
int len = SkToInt(strlen(text));
SkPath path;
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(SkIntToScalar(48));
canvas->translate(SkIntToScalar(10), SkIntToScalar(64));
canvas->drawText(text, len, 0, 0, paint);
paint.getTextPath(text, len, 0, 0, &path);
strokePath(canvas, path);
path.reset();
SkAutoTArray<SkPoint> pos(len);
SkAutoTArray<SkScalar> widths(len);
paint.getTextWidths(text, len, &widths[0]);
SkLCGRandom rand;
SkScalar x = SkIntToScalar(20);
SkScalar y = SkIntToScalar(100);
for (int i = 0; i < len; ++i) {
pos[i].set(x, y + rand.nextSScalar1() * 24);
x += widths[i];
}
canvas->translate(0, SkIntToScalar(64));
canvas->drawPosText(text, len, &pos[0], paint);
paint.getPosTextPath(text, len, &pos[0], &path);
strokePath(canvas, path);
}
TemporaryRef<Path>
ScaledFontSkia::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
{
if (aTarget->GetType() != BACKEND_SKIA) {
return NULL;
}
SkPaint paint;
paint.setTypeface(mTypeface);
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);
}
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;
}
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);
DrawTarget *dt = const_cast<DrawTarget*>(aTarget);
cairo_t *ctx = static_cast<cairo_t*>(dt->GetNativeSurface(NATIVE_SURFACE_CAIRO_CONTEXT));
bool isNewContext = !ctx;
if (!ctx) {
ctx = cairo_create(DrawTargetCairo::GetDummySurface());
cairo_matrix_t mat;
GfxMatrixToCairoMatrix(aTarget->GetTransform(), mat);
cairo_set_matrix(ctx, &mat);
}
cairo_set_scaled_font(ctx, 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(ctx, &glyphs[0], aBuffer.mNumGlyphs);
RefPtr<PathCairo> newPath = new PathCairo(ctx);
if (isNewContext) {
cairo_destroy(ctx);
}
return newPath;
}
#endif
return nullptr;
}