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/* -*- 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 "ScaledFontBase.h"
#ifdef USE_SKIA
#include "PathSkia.h"
#include "skia/include/core/SkPaint.h"
#endif
#ifdef USE_CAIRO
#include "PathCairo.h"
#include "DrawTargetCairo.h"
#include "HelpersCairo.h"
#endif
#include <vector>
#include <cmath>
using namespace std;
namespace mozilla {
namespace gfx {
ScaledFontBase::~ScaledFontBase()
{
#ifdef USE_SKIA
SkSafeUnref(mTypeface);
#endif
#ifdef USE_CAIRO_SCALED_FONT
cairo_scaled_font_destroy(mScaledFont);
#endif
}
ScaledFontBase::ScaledFontBase(Float aSize)
: mSize(aSize)
{
#ifdef USE_SKIA
mTypeface = nullptr;
#endif
#ifdef USE_CAIRO_SCALED_FONT
mScaledFont = nullptr;
#endif
}
#ifdef USE_CAIRO_SCALED_FONT
bool
ScaledFontBase::PopulateCairoScaledFont()
{
cairo_font_face_t* cairoFontFace = GetCairoFontFace();
if (!cairoFontFace) {
return false;
}
cairo_matrix_t sizeMatrix;
cairo_matrix_t identityMatrix;
cairo_matrix_init_scale(&sizeMatrix, mSize, mSize);
cairo_matrix_init_identity(&identityMatrix);
cairo_font_options_t *fontOptions = cairo_font_options_create();
mScaledFont = cairo_scaled_font_create(cairoFontFace, &sizeMatrix,
&identityMatrix, fontOptions);
cairo_font_options_destroy(fontOptions);
cairo_font_face_destroy(cairoFontFace);
return (cairo_scaled_font_status(mScaledFont) == CAIRO_STATUS_SUCCESS);
}
#endif
#ifdef USE_SKIA
SkPath
ScaledFontBase::GetSkiaPathForGlyphs(const GlyphBuffer &aBuffer)
{
SkTypeface *typeFace = GetSkTypeface();
MOZ_ASSERT(typeFace);
SkPaint paint;
paint.setTypeface(sk_ref_sp(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;
}
#endif
already_AddRefed<Path>
ScaledFontBase::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
{
#ifdef USE_SKIA
if (aTarget->GetBackendType() == BackendType::SKIA) {
SkPath path = GetSkiaPathForGlyphs(aBuffer);
return MakeAndAddRef<PathSkia>(path, FillRule::FILL_WINDING);
}
#endif
#ifdef USE_CAIRO
if (aTarget->GetBackendType() == BackendType::CAIRO) {
MOZ_ASSERT(mScaledFont);
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, 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_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
return nullptr;
}
void
ScaledFontBase::CopyGlyphsToBuilder(const GlyphBuffer &aBuffer, PathBuilder *aBuilder, const Matrix *aTransformHint)
{
BackendType backendType = aBuilder->GetBackendType();
#ifdef USE_SKIA
if (backendType == BackendType::SKIA) {
PathBuilderSkia *builder = static_cast<PathBuilderSkia*>(aBuilder);
builder->AppendPath(GetSkiaPathForGlyphs(aBuffer));
return;
}
#endif
#ifdef USE_CAIRO
if (backendType == BackendType::CAIRO) {
MOZ_ASSERT(mScaledFont);
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, mScaledFont);
cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
RefPtr<PathCairo> cairoPath = new PathCairo(ctx);
cairo_destroy(ctx);
cairoPath->AppendPathToBuilder(builder);
return;
}
#endif
}
void
ScaledFontBase::GetGlyphDesignMetrics(const uint16_t* aGlyphs, uint32_t aNumGlyphs, GlyphMetrics* aGlyphMetrics)
{
#ifdef USE_CAIRO_SCALED_FONT
if (mScaledFont) {
for (uint32_t i = 0; i < aNumGlyphs; i++) {
cairo_glyph_t glyph;
cairo_text_extents_t extents;
glyph.index = aGlyphs[i];
glyph.x = 0;
glyph.y = 0;
cairo_scaled_font_glyph_extents(mScaledFont, &glyph, 1, &extents);
aGlyphMetrics[i].mXBearing = extents.x_bearing;
aGlyphMetrics[i].mXAdvance = extents.x_advance;
aGlyphMetrics[i].mYBearing = extents.y_bearing;
aGlyphMetrics[i].mYAdvance = extents.y_advance;
aGlyphMetrics[i].mWidth = extents.width;
aGlyphMetrics[i].mHeight = extents.height;
cairo_font_options_t *options = cairo_font_options_create();
cairo_scaled_font_get_font_options(mScaledFont, options);
if (cairo_font_options_get_antialias(options) != CAIRO_ANTIALIAS_NONE) {
if (cairo_scaled_font_get_type(mScaledFont) == CAIRO_FONT_TYPE_WIN32) {
if (aGlyphMetrics[i].mWidth > 0 && aGlyphMetrics[i].mHeight > 0) {
aGlyphMetrics[i].mWidth -= 3.0f;
aGlyphMetrics[i].mXBearing += 1.0f;
}
}
#if defined(MOZ2D_HAS_MOZ_CAIRO) && defined(CAIRO_HAS_DWRITE_FONT)
else if (cairo_scaled_font_get_type(mScaledFont) == CAIRO_FONT_TYPE_DWRITE) {
if (aGlyphMetrics[i].mWidth > 0 && aGlyphMetrics[i].mHeight > 0) {
aGlyphMetrics[i].mWidth -= 2.0f;
aGlyphMetrics[i].mXBearing += 1.0f;
}
}
#endif
}
cairo_font_options_destroy(options);
}
}
#endif
// Don't know how to get the glyph metrics...
MOZ_CRASH("The specific backend type is not supported for GetGlyphDesignMetrics.");
}
#ifdef USE_CAIRO_SCALED_FONT
void
ScaledFontBase::SetCairoScaledFont(cairo_scaled_font_t* font)
{
MOZ_ASSERT(!mScaledFont);
if (font == mScaledFont)
return;
if (mScaledFont)
cairo_scaled_font_destroy(mScaledFont);
mScaledFont = font;
cairo_scaled_font_reference(mScaledFont);
}
#endif
} // namespace gfx
} // namespace mozilla
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