michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "ScaledFontBase.h"
michael@0: 
michael@0: #ifdef USE_SKIA
michael@0: #include "PathSkia.h"
michael@0: #include "skia/SkEmptyShader.h"
michael@0: #include "skia/SkPaint.h"
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_CAIRO
michael@0: #include "PathCairo.h"
michael@0: #include "DrawTargetCairo.h"
michael@0: #include "HelpersCairo.h"
michael@0: #endif
michael@0: 
michael@0: #include <vector>
michael@0: #include <cmath>
michael@0: 
michael@0: using namespace std;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: ScaledFontBase::~ScaledFontBase()
michael@0: {
michael@0: #ifdef USE_SKIA
michael@0:   SkSafeUnref(mTypeface);
michael@0: #endif
michael@0: #ifdef USE_CAIRO_SCALED_FONT
michael@0:   cairo_scaled_font_destroy(mScaledFont);
michael@0: #endif
michael@0: }
michael@0: 
michael@0: ScaledFontBase::ScaledFontBase(Float aSize)
michael@0:   : mSize(aSize)
michael@0: {
michael@0: #ifdef USE_SKIA
michael@0:   mTypeface = nullptr;
michael@0: #endif
michael@0: #ifdef USE_CAIRO_SCALED_FONT
michael@0:   mScaledFont = nullptr;
michael@0: #endif
michael@0: }
michael@0: 
michael@0: #ifdef USE_SKIA
michael@0: SkPath
michael@0: ScaledFontBase::GetSkiaPathForGlyphs(const GlyphBuffer &aBuffer)
michael@0: {
michael@0:   SkTypeface *typeFace = GetSkTypeface();
michael@0:   MOZ_ASSERT(typeFace);
michael@0: 
michael@0:   SkPaint paint;
michael@0:   paint.setTypeface(typeFace);
michael@0:   paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
michael@0:   paint.setTextSize(SkFloatToScalar(mSize));
michael@0: 
michael@0:   std::vector<uint16_t> indices;
michael@0:   std::vector<SkPoint> offsets;
michael@0:   indices.resize(aBuffer.mNumGlyphs);
michael@0:   offsets.resize(aBuffer.mNumGlyphs);
michael@0: 
michael@0:   for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
michael@0:     indices[i] = aBuffer.mGlyphs[i].mIndex;
michael@0:     offsets[i].fX = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.x);
michael@0:     offsets[i].fY = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.y);
michael@0:   }
michael@0: 
michael@0:   SkPath path;
michael@0:   paint.getPosTextPath(&indices.front(), aBuffer.mNumGlyphs*2, &offsets.front(), &path);
michael@0:   return path;
michael@0: }
michael@0: #endif
michael@0: 
michael@0: TemporaryRef<Path>
michael@0: ScaledFontBase::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
michael@0: {
michael@0: #ifdef USE_SKIA
michael@0:   if (aTarget->GetType() == BackendType::SKIA) {
michael@0:     SkPath path = GetSkiaPathForGlyphs(aBuffer);
michael@0:     return new PathSkia(path, FillRule::FILL_WINDING);
michael@0:   }
michael@0: #endif
michael@0: #ifdef USE_CAIRO
michael@0:   if (aTarget->GetType() == BackendType::CAIRO) {
michael@0:     MOZ_ASSERT(mScaledFont);
michael@0: 
michael@0:     DrawTarget *dt = const_cast<DrawTarget*>(aTarget);
michael@0:     cairo_t *ctx = static_cast<cairo_t*>(dt->GetNativeSurface(NativeSurfaceType::CAIRO_CONTEXT));
michael@0: 
michael@0:     bool isNewContext = !ctx;
michael@0:     if (!ctx) {
michael@0:       ctx = cairo_create(DrawTargetCairo::GetDummySurface());
michael@0:       cairo_matrix_t mat;
michael@0:       GfxMatrixToCairoMatrix(aTarget->GetTransform(), mat);
michael@0:       cairo_set_matrix(ctx, &mat);
michael@0:     }
michael@0: 
michael@0:     cairo_set_scaled_font(ctx, mScaledFont);
michael@0: 
michael@0:     // Convert our GlyphBuffer into an array of Cairo glyphs.
michael@0:     std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
michael@0:     for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
michael@0:       glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
michael@0:       glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
michael@0:       glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
michael@0:     }
michael@0: 
michael@0:     cairo_new_path(ctx);
michael@0: 
michael@0:     cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
michael@0: 
michael@0:     RefPtr<PathCairo> newPath = new PathCairo(ctx);
michael@0:     if (isNewContext) {
michael@0:       cairo_destroy(ctx);
michael@0:     }
michael@0: 
michael@0:     return newPath;
michael@0:   }
michael@0: #endif
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: void
michael@0: ScaledFontBase::CopyGlyphsToBuilder(const GlyphBuffer &aBuffer, PathBuilder *aBuilder, BackendType aBackendType, const Matrix *aTransformHint)
michael@0: {
michael@0: #ifdef USE_SKIA
michael@0:   if (aBackendType == BackendType::SKIA) {
michael@0:     PathBuilderSkia *builder = static_cast<PathBuilderSkia*>(aBuilder);
michael@0:     builder->AppendPath(GetSkiaPathForGlyphs(aBuffer));
michael@0:     return;
michael@0:   }
michael@0: #endif
michael@0: #ifdef USE_CAIRO
michael@0:   if (aBackendType == BackendType::CAIRO) {
michael@0:     MOZ_ASSERT(mScaledFont);
michael@0: 
michael@0:     PathBuilderCairo* builder = static_cast<PathBuilderCairo*>(aBuilder);
michael@0:     cairo_t *ctx = cairo_create(DrawTargetCairo::GetDummySurface());
michael@0: 
michael@0:     if (aTransformHint) {
michael@0:       cairo_matrix_t mat;
michael@0:       GfxMatrixToCairoMatrix(*aTransformHint, mat);
michael@0:       cairo_set_matrix(ctx, &mat);
michael@0:     }
michael@0: 
michael@0:     // Convert our GlyphBuffer into an array of Cairo glyphs.
michael@0:     std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
michael@0:     for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
michael@0:       glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
michael@0:       glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
michael@0:       glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
michael@0:     }
michael@0: 
michael@0:     cairo_set_scaled_font(ctx, mScaledFont);
michael@0:     cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
michael@0: 
michael@0:     RefPtr<PathCairo> cairoPath = new PathCairo(ctx);
michael@0:     cairo_destroy(ctx);
michael@0: 
michael@0:     cairoPath->AppendPathToBuilder(builder);
michael@0:     return;
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   MOZ_CRASH("The specified backend type is not supported by CopyGlyphsToBuilder");
michael@0: }
michael@0: 
michael@0: #ifdef USE_CAIRO_SCALED_FONT
michael@0: void
michael@0: ScaledFontBase::SetCairoScaledFont(cairo_scaled_font_t* font)
michael@0: {
michael@0:   MOZ_ASSERT(!mScaledFont);
michael@0: 
michael@0:   if (font == mScaledFont)
michael@0:     return;
michael@0:  
michael@0:   if (mScaledFont)
michael@0:     cairo_scaled_font_destroy(mScaledFont);
michael@0: 
michael@0:   mScaledFont = font;
michael@0:   cairo_scaled_font_reference(mScaledFont);
michael@0: }
michael@0: #endif
michael@0: 
michael@0: }
michael@0: }