mirror of
https://github.com/mozilla/gecko-dev.git
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267 lines
7.2 KiB
C++
267 lines
7.2 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ScaledFontBase.h"
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#ifdef USE_SKIA
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#include "PathSkia.h"
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#include "skia/include/core/SkPaint.h"
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#endif
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#ifdef USE_CAIRO
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#include "PathCairo.h"
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#include "DrawTargetCairo.h"
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#include "HelpersCairo.h"
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#endif
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#include <vector>
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#include <cmath>
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using namespace std;
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namespace mozilla {
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namespace gfx {
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ScaledFontBase::~ScaledFontBase()
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{
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#ifdef USE_SKIA
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SkSafeUnref(mTypeface);
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#endif
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#ifdef USE_CAIRO_SCALED_FONT
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cairo_scaled_font_destroy(mScaledFont);
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#endif
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}
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ScaledFontBase::ScaledFontBase(Float aSize)
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: mSize(aSize)
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{
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#ifdef USE_SKIA
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mTypeface = nullptr;
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#endif
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#ifdef USE_CAIRO_SCALED_FONT
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mScaledFont = nullptr;
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#endif
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}
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#ifdef USE_CAIRO_SCALED_FONT
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bool
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ScaledFontBase::PopulateCairoScaledFont()
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{
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cairo_font_face_t* cairoFontFace = GetCairoFontFace();
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if (!cairoFontFace) {
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return false;
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}
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cairo_matrix_t sizeMatrix;
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cairo_matrix_t identityMatrix;
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cairo_matrix_init_scale(&sizeMatrix, mSize, mSize);
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cairo_matrix_init_identity(&identityMatrix);
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cairo_font_options_t *fontOptions = cairo_font_options_create();
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mScaledFont = cairo_scaled_font_create(cairoFontFace, &sizeMatrix,
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&identityMatrix, fontOptions);
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cairo_font_options_destroy(fontOptions);
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cairo_font_face_destroy(cairoFontFace);
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return (cairo_scaled_font_status(mScaledFont) == CAIRO_STATUS_SUCCESS);
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}
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#endif
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#ifdef USE_SKIA
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SkPath
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ScaledFontBase::GetSkiaPathForGlyphs(const GlyphBuffer &aBuffer)
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{
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SkTypeface *typeFace = GetSkTypeface();
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MOZ_ASSERT(typeFace);
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SkPaint paint;
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paint.setTypeface(sk_ref_sp(typeFace));
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paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
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paint.setTextSize(SkFloatToScalar(mSize));
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std::vector<uint16_t> indices;
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std::vector<SkPoint> offsets;
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indices.resize(aBuffer.mNumGlyphs);
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offsets.resize(aBuffer.mNumGlyphs);
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for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
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indices[i] = aBuffer.mGlyphs[i].mIndex;
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offsets[i].fX = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.x);
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offsets[i].fY = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.y);
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}
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SkPath path;
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paint.getPosTextPath(&indices.front(), aBuffer.mNumGlyphs*2, &offsets.front(), &path);
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return path;
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}
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#endif
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already_AddRefed<Path>
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ScaledFontBase::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
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{
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#ifdef USE_SKIA
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if (aTarget->GetBackendType() == BackendType::SKIA) {
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SkPath path = GetSkiaPathForGlyphs(aBuffer);
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return MakeAndAddRef<PathSkia>(path, FillRule::FILL_WINDING);
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}
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#endif
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#ifdef USE_CAIRO
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if (aTarget->GetBackendType() == BackendType::CAIRO) {
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MOZ_ASSERT(mScaledFont);
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DrawTarget *dt = const_cast<DrawTarget*>(aTarget);
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cairo_t *ctx = static_cast<cairo_t*>(dt->GetNativeSurface(NativeSurfaceType::CAIRO_CONTEXT));
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bool isNewContext = !ctx;
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if (!ctx) {
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ctx = cairo_create(DrawTargetCairo::GetDummySurface());
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cairo_matrix_t mat;
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GfxMatrixToCairoMatrix(aTarget->GetTransform(), mat);
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cairo_set_matrix(ctx, &mat);
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}
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cairo_set_scaled_font(ctx, mScaledFont);
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// Convert our GlyphBuffer into an array of Cairo glyphs.
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std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
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for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
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glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
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glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
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glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
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}
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cairo_new_path(ctx);
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cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
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RefPtr<PathCairo> newPath = new PathCairo(ctx);
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if (isNewContext) {
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cairo_destroy(ctx);
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}
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return newPath.forget();
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}
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#endif
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return nullptr;
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}
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void
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ScaledFontBase::CopyGlyphsToBuilder(const GlyphBuffer &aBuffer, PathBuilder *aBuilder, const Matrix *aTransformHint)
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{
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BackendType backendType = aBuilder->GetBackendType();
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#ifdef USE_SKIA
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if (backendType == BackendType::SKIA) {
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PathBuilderSkia *builder = static_cast<PathBuilderSkia*>(aBuilder);
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builder->AppendPath(GetSkiaPathForGlyphs(aBuffer));
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return;
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}
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#endif
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#ifdef USE_CAIRO
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if (backendType == BackendType::CAIRO) {
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MOZ_ASSERT(mScaledFont);
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PathBuilderCairo* builder = static_cast<PathBuilderCairo*>(aBuilder);
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cairo_t *ctx = cairo_create(DrawTargetCairo::GetDummySurface());
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if (aTransformHint) {
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cairo_matrix_t mat;
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GfxMatrixToCairoMatrix(*aTransformHint, mat);
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cairo_set_matrix(ctx, &mat);
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}
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// Convert our GlyphBuffer into an array of Cairo glyphs.
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std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
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for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
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glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
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glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
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glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
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}
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cairo_set_scaled_font(ctx, mScaledFont);
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cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
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RefPtr<PathCairo> cairoPath = new PathCairo(ctx);
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cairo_destroy(ctx);
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cairoPath->AppendPathToBuilder(builder);
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return;
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}
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#endif
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}
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void
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ScaledFontBase::GetGlyphDesignMetrics(const uint16_t* aGlyphs, uint32_t aNumGlyphs, GlyphMetrics* aGlyphMetrics)
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{
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#ifdef USE_CAIRO_SCALED_FONT
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if (mScaledFont) {
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for (uint32_t i = 0; i < aNumGlyphs; i++) {
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cairo_glyph_t glyph;
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cairo_text_extents_t extents;
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glyph.index = aGlyphs[i];
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glyph.x = 0;
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glyph.y = 0;
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cairo_scaled_font_glyph_extents(mScaledFont, &glyph, 1, &extents);
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aGlyphMetrics[i].mXBearing = extents.x_bearing;
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aGlyphMetrics[i].mXAdvance = extents.x_advance;
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aGlyphMetrics[i].mYBearing = extents.y_bearing;
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aGlyphMetrics[i].mYAdvance = extents.y_advance;
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aGlyphMetrics[i].mWidth = extents.width;
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aGlyphMetrics[i].mHeight = extents.height;
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cairo_font_options_t *options = cairo_font_options_create();
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cairo_scaled_font_get_font_options(mScaledFont, options);
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if (cairo_font_options_get_antialias(options) != CAIRO_ANTIALIAS_NONE) {
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if (cairo_scaled_font_get_type(mScaledFont) == CAIRO_FONT_TYPE_WIN32) {
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if (aGlyphMetrics[i].mWidth > 0 && aGlyphMetrics[i].mHeight > 0) {
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aGlyphMetrics[i].mWidth -= 3.0f;
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aGlyphMetrics[i].mXBearing += 1.0f;
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}
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}
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#if defined(MOZ2D_HAS_MOZ_CAIRO) && defined(CAIRO_HAS_DWRITE_FONT)
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else if (cairo_scaled_font_get_type(mScaledFont) == CAIRO_FONT_TYPE_DWRITE) {
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if (aGlyphMetrics[i].mWidth > 0 && aGlyphMetrics[i].mHeight > 0) {
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aGlyphMetrics[i].mWidth -= 2.0f;
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aGlyphMetrics[i].mXBearing += 1.0f;
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}
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}
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#endif
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}
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cairo_font_options_destroy(options);
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}
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}
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#endif
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// Don't know how to get the glyph metrics...
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MOZ_CRASH("The specific backend type is not supported for GetGlyphDesignMetrics.");
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}
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#ifdef USE_CAIRO_SCALED_FONT
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void
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ScaledFontBase::SetCairoScaledFont(cairo_scaled_font_t* font)
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{
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MOZ_ASSERT(!mScaledFont);
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if (font == mScaledFont)
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return;
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if (mScaledFont)
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cairo_scaled_font_destroy(mScaledFont);
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mScaledFont = font;
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cairo_scaled_font_reference(mScaledFont);
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}
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#endif
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} // namespace gfx
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} // namespace mozilla
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