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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#include "ScaledFontBase.h"
#include "PathSkia.h"
#include "skia/include/core/SkFont.h"
#ifdef USE_CAIRO
# include "PathCairo.h"
# include "DrawTargetCairo.h"
# include "HelpersCairo.h"
#endif
#include <vector>
#include <cmath>
namespace mozilla {
namespace gfx {
Atomic<uint32_t> UnscaledFont::sDeletionCounter(0);
UnscaledFont::~UnscaledFont() { sDeletionCounter++; }
Atomic<uint32_t> ScaledFont::sDeletionCounter(0);
ScaledFont::~ScaledFont() { sDeletionCounter++; }
ScaledFontBase::~ScaledFontBase() {
SkSafeUnref<SkTypeface>(mTypeface);
cairo_scaled_font_destroy(mScaledFont);
}
ScaledFontBase::ScaledFontBase(const RefPtr<UnscaledFont>& aUnscaledFont,
Float aSize)
: ScaledFont(aUnscaledFont),
mTypeface(nullptr),
mScaledFont(nullptr),
mSize(aSize) {}
SkTypeface* ScaledFontBase::GetSkTypeface() {
if (!mTypeface) {
SkTypeface* typeface = CreateSkTypeface();
if (!mTypeface.compareExchange(nullptr, typeface)) {
SkSafeUnref(typeface);
}
}
return mTypeface;
}
cairo_scaled_font_t* ScaledFontBase::GetCairoScaledFont() {
if (mScaledFont) {
return mScaledFont;
}
cairo_font_options_t* fontOptions = cairo_font_options_create();
cairo_font_face_t* fontFace = CreateCairoFontFace(fontOptions);
if (!fontFace) {
cairo_font_options_destroy(fontOptions);
return nullptr;
}
cairo_matrix_t sizeMatrix;
cairo_matrix_t identityMatrix;
cairo_matrix_init_scale(&sizeMatrix, mSize, mSize);
cairo_matrix_init_identity(&identityMatrix);
cairo_scaled_font_t* scaledFont = cairo_scaled_font_create(
fontFace, &sizeMatrix, &identityMatrix, fontOptions);
cairo_font_options_destroy(fontOptions);
cairo_font_face_destroy(fontFace);
if (cairo_scaled_font_status(scaledFont) != CAIRO_STATUS_SUCCESS) {
cairo_scaled_font_destroy(scaledFont);
return nullptr;
}
PrepareCairoScaledFont(scaledFont);
mScaledFont = scaledFont;
return mScaledFont;
}
SkPath ScaledFontBase::GetSkiaPathForGlyphs(const GlyphBuffer& aBuffer) {
SkTypeface* typeFace = GetSkTypeface();
MOZ_ASSERT(typeFace);
SkFont font(sk_ref_sp(typeFace), SkFloatToScalar(mSize));
std::vector<uint16_t> indices;
indices.resize(aBuffer.mNumGlyphs);
for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
indices[i] = aBuffer.mGlyphs[i].mIndex;
}
struct Context {
const Glyph* mGlyph;
SkPath mPath;
} ctx = {aBuffer.mGlyphs};
font.getPaths(
indices.data(), indices.size(),
[](const SkPath* glyphPath, const SkMatrix& scaleMatrix, void* ctxPtr) {
Context& ctx = *reinterpret_cast<Context*>(ctxPtr);
if (glyphPath) {
SkMatrix transMatrix(scaleMatrix);
transMatrix.postTranslate(SkFloatToScalar(ctx.mGlyph->mPosition.x),
SkFloatToScalar(ctx.mGlyph->mPosition.y));
ctx.mPath.addPath(*glyphPath, transMatrix);
}
++ctx.mGlyph;
},
&ctx);
return ctx.mPath;
}
already_AddRefed<Path> ScaledFontBase::GetPathForGlyphs(
const GlyphBuffer& aBuffer, const DrawTarget* aTarget) {
if (aTarget->GetBackendType() == BackendType::SKIA) {
SkPath path = GetSkiaPathForGlyphs(aBuffer);
return MakeAndAddRef<PathSkia>(path, FillRule::FILL_WINDING);
}
#ifdef USE_CAIRO
if (aTarget->GetBackendType() == BackendType::CAIRO) {
auto* cairoScaledFont = GetCairoScaledFont();
if (!cairoScaledFont) {
MOZ_ASSERT_UNREACHABLE("Invalid scaled font");
return nullptr;
}
DrawTarget* dt = const_cast<DrawTarget*>(aTarget);
cairo_t* ctx = static_cast<cairo_t*>(
dt->GetNativeSurface(NativeSurfaceType::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, cairoScaledFont);
// 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_new_path(ctx);
cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
RefPtr<PathCairo> newPath = new PathCairo(ctx);
if (isNewContext) {
cairo_destroy(ctx);
}
return newPath.forget();
}
#endif
RefPtr<PathBuilder> builder = aTarget->CreatePathBuilder();
SkPath skPath = GetSkiaPathForGlyphs(aBuffer);
RefPtr<Path> path = MakeAndAddRef<PathSkia>(skPath, FillRule::FILL_WINDING);
path->StreamToSink(builder);
return builder->Finish();
}
void ScaledFontBase::CopyGlyphsToBuilder(const GlyphBuffer& aBuffer,
PathBuilder* aBuilder,
const Matrix* aTransformHint) {
BackendType backendType = aBuilder->GetBackendType();
if (backendType == BackendType::SKIA) {
PathBuilderSkia* builder = static_cast<PathBuilderSkia*>(aBuilder);
builder->AppendPath(GetSkiaPathForGlyphs(aBuffer));
return;
}
#ifdef USE_CAIRO
if (backendType == BackendType::CAIRO) {
auto* cairoScaledFont = GetCairoScaledFont();
if (!cairoScaledFont) {
MOZ_ASSERT_UNREACHABLE("Invalid scaled font");
return;
}
PathBuilderCairo* builder = static_cast<PathBuilderCairo*>(aBuilder);
cairo_t* ctx = cairo_create(DrawTargetCairo::GetDummySurface());
if (aTransformHint) {
cairo_matrix_t mat;
GfxMatrixToCairoMatrix(*aTransformHint, mat);
cairo_set_matrix(ctx, &mat);
}
// 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_set_scaled_font(ctx, cairoScaledFont);
cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
RefPtr<PathCairo> cairoPath = new PathCairo(ctx);
cairo_destroy(ctx);
cairoPath->AppendPathToBuilder(builder);
return;
}
#endif
if (backendType == BackendType::RECORDING) {
SkPath skPath = GetSkiaPathForGlyphs(aBuffer);
RefPtr<Path> path = MakeAndAddRef<PathSkia>(skPath, FillRule::FILL_WINDING);
path->StreamToSink(aBuilder);
return;
}
MOZ_ASSERT(false, "Path not being copied");
}
} // namespace gfx
} // namespace mozilla