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-rw-r--r--gfx/2d/ScaledFontBase.cpp266
1 files changed, 266 insertions, 0 deletions
diff --git a/gfx/2d/ScaledFontBase.cpp b/gfx/2d/ScaledFontBase.cpp
new file mode 100644
index 000000000..ca9b2a188
--- /dev/null
+++ b/gfx/2d/ScaledFontBase.cpp
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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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 19:14:24 +0000