1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/2d/ScaledFontBase.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,190 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "ScaledFontBase.h"
1.10 +
1.11 +#ifdef USE_SKIA
1.12 +#include "PathSkia.h"
1.13 +#include "skia/SkEmptyShader.h"
1.14 +#include "skia/SkPaint.h"
1.15 +#endif
1.16 +
1.17 +#ifdef USE_CAIRO
1.18 +#include "PathCairo.h"
1.19 +#include "DrawTargetCairo.h"
1.20 +#include "HelpersCairo.h"
1.21 +#endif
1.22 +
1.23 +#include <vector>
1.24 +#include <cmath>
1.25 +
1.26 +using namespace std;
1.27 +
1.28 +namespace mozilla {
1.29 +namespace gfx {
1.30 +
1.31 +ScaledFontBase::~ScaledFontBase()
1.32 +{
1.33 +#ifdef USE_SKIA
1.34 + SkSafeUnref(mTypeface);
1.35 +#endif
1.36 +#ifdef USE_CAIRO_SCALED_FONT
1.37 + cairo_scaled_font_destroy(mScaledFont);
1.38 +#endif
1.39 +}
1.40 +
1.41 +ScaledFontBase::ScaledFontBase(Float aSize)
1.42 + : mSize(aSize)
1.43 +{
1.44 +#ifdef USE_SKIA
1.45 + mTypeface = nullptr;
1.46 +#endif
1.47 +#ifdef USE_CAIRO_SCALED_FONT
1.48 + mScaledFont = nullptr;
1.49 +#endif
1.50 +}
1.51 +
1.52 +#ifdef USE_SKIA
1.53 +SkPath
1.54 +ScaledFontBase::GetSkiaPathForGlyphs(const GlyphBuffer &aBuffer)
1.55 +{
1.56 + SkTypeface *typeFace = GetSkTypeface();
1.57 + MOZ_ASSERT(typeFace);
1.58 +
1.59 + SkPaint paint;
1.60 + paint.setTypeface(typeFace);
1.61 + paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
1.62 + paint.setTextSize(SkFloatToScalar(mSize));
1.63 +
1.64 + std::vector<uint16_t> indices;
1.65 + std::vector<SkPoint> offsets;
1.66 + indices.resize(aBuffer.mNumGlyphs);
1.67 + offsets.resize(aBuffer.mNumGlyphs);
1.68 +
1.69 + for (unsigned int i = 0; i < aBuffer.mNumGlyphs; i++) {
1.70 + indices[i] = aBuffer.mGlyphs[i].mIndex;
1.71 + offsets[i].fX = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.x);
1.72 + offsets[i].fY = SkFloatToScalar(aBuffer.mGlyphs[i].mPosition.y);
1.73 + }
1.74 +
1.75 + SkPath path;
1.76 + paint.getPosTextPath(&indices.front(), aBuffer.mNumGlyphs*2, &offsets.front(), &path);
1.77 + return path;
1.78 +}
1.79 +#endif
1.80 +
1.81 +TemporaryRef<Path>
1.82 +ScaledFontBase::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aTarget)
1.83 +{
1.84 +#ifdef USE_SKIA
1.85 + if (aTarget->GetType() == BackendType::SKIA) {
1.86 + SkPath path = GetSkiaPathForGlyphs(aBuffer);
1.87 + return new PathSkia(path, FillRule::FILL_WINDING);
1.88 + }
1.89 +#endif
1.90 +#ifdef USE_CAIRO
1.91 + if (aTarget->GetType() == BackendType::CAIRO) {
1.92 + MOZ_ASSERT(mScaledFont);
1.93 +
1.94 + DrawTarget *dt = const_cast<DrawTarget*>(aTarget);
1.95 + cairo_t *ctx = static_cast<cairo_t*>(dt->GetNativeSurface(NativeSurfaceType::CAIRO_CONTEXT));
1.96 +
1.97 + bool isNewContext = !ctx;
1.98 + if (!ctx) {
1.99 + ctx = cairo_create(DrawTargetCairo::GetDummySurface());
1.100 + cairo_matrix_t mat;
1.101 + GfxMatrixToCairoMatrix(aTarget->GetTransform(), mat);
1.102 + cairo_set_matrix(ctx, &mat);
1.103 + }
1.104 +
1.105 + cairo_set_scaled_font(ctx, mScaledFont);
1.106 +
1.107 + // Convert our GlyphBuffer into an array of Cairo glyphs.
1.108 + std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
1.109 + for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
1.110 + glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
1.111 + glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
1.112 + glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
1.113 + }
1.114 +
1.115 + cairo_new_path(ctx);
1.116 +
1.117 + cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
1.118 +
1.119 + RefPtr<PathCairo> newPath = new PathCairo(ctx);
1.120 + if (isNewContext) {
1.121 + cairo_destroy(ctx);
1.122 + }
1.123 +
1.124 + return newPath;
1.125 + }
1.126 +#endif
1.127 + return nullptr;
1.128 +}
1.129 +
1.130 +void
1.131 +ScaledFontBase::CopyGlyphsToBuilder(const GlyphBuffer &aBuffer, PathBuilder *aBuilder, BackendType aBackendType, const Matrix *aTransformHint)
1.132 +{
1.133 +#ifdef USE_SKIA
1.134 + if (aBackendType == BackendType::SKIA) {
1.135 + PathBuilderSkia *builder = static_cast<PathBuilderSkia*>(aBuilder);
1.136 + builder->AppendPath(GetSkiaPathForGlyphs(aBuffer));
1.137 + return;
1.138 + }
1.139 +#endif
1.140 +#ifdef USE_CAIRO
1.141 + if (aBackendType == BackendType::CAIRO) {
1.142 + MOZ_ASSERT(mScaledFont);
1.143 +
1.144 + PathBuilderCairo* builder = static_cast<PathBuilderCairo*>(aBuilder);
1.145 + cairo_t *ctx = cairo_create(DrawTargetCairo::GetDummySurface());
1.146 +
1.147 + if (aTransformHint) {
1.148 + cairo_matrix_t mat;
1.149 + GfxMatrixToCairoMatrix(*aTransformHint, mat);
1.150 + cairo_set_matrix(ctx, &mat);
1.151 + }
1.152 +
1.153 + // Convert our GlyphBuffer into an array of Cairo glyphs.
1.154 + std::vector<cairo_glyph_t> glyphs(aBuffer.mNumGlyphs);
1.155 + for (uint32_t i = 0; i < aBuffer.mNumGlyphs; ++i) {
1.156 + glyphs[i].index = aBuffer.mGlyphs[i].mIndex;
1.157 + glyphs[i].x = aBuffer.mGlyphs[i].mPosition.x;
1.158 + glyphs[i].y = aBuffer.mGlyphs[i].mPosition.y;
1.159 + }
1.160 +
1.161 + cairo_set_scaled_font(ctx, mScaledFont);
1.162 + cairo_glyph_path(ctx, &glyphs[0], aBuffer.mNumGlyphs);
1.163 +
1.164 + RefPtr<PathCairo> cairoPath = new PathCairo(ctx);
1.165 + cairo_destroy(ctx);
1.166 +
1.167 + cairoPath->AppendPathToBuilder(builder);
1.168 + return;
1.169 + }
1.170 +#endif
1.171 +
1.172 + MOZ_CRASH("The specified backend type is not supported by CopyGlyphsToBuilder");
1.173 +}
1.174 +
1.175 +#ifdef USE_CAIRO_SCALED_FONT
1.176 +void
1.177 +ScaledFontBase::SetCairoScaledFont(cairo_scaled_font_t* font)
1.178 +{
1.179 + MOZ_ASSERT(!mScaledFont);
1.180 +
1.181 + if (font == mScaledFont)
1.182 + return;
1.183 +
1.184 + if (mScaledFont)
1.185 + cairo_scaled_font_destroy(mScaledFont);
1.186 +
1.187 + mScaledFont = font;
1.188 + cairo_scaled_font_reference(mScaledFont);
1.189 +}
1.190 +#endif
1.191 +
1.192 +}
1.193 +}
