| // Copyright 2016 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "core/fxge/cfx_glyphcache.h" |
| |
| #include <stdarg.h> |
| |
| #include <algorithm> |
| #include <limits> |
| #include <memory> |
| #include <utility> |
| |
| #include "build/build_config.h" |
| #include "core/fxcrt/fx_codepage.h" |
| #include "core/fxge/cfx_defaultrenderdevice.h" |
| #include "core/fxge/cfx_font.h" |
| #include "core/fxge/cfx_fontmgr.h" |
| #include "core/fxge/cfx_gemodule.h" |
| #include "core/fxge/cfx_glyphbitmap.h" |
| #include "core/fxge/cfx_path.h" |
| #include "core/fxge/cfx_substfont.h" |
| #include "core/fxge/dib/cfx_dibitmap.h" |
| #include "core/fxge/freetype/fx_freetype.h" |
| #include "core/fxge/scoped_font_transform.h" |
| #include "third_party/base/numerics/safe_math.h" |
| |
| #ifdef _SKIA_SUPPORT_ |
| #include "third_party/skia/include/core/SkStream.h" // nogncheck |
| #include "third_party/skia/include/core/SkTypeface.h" // nogncheck |
| |
| #if BUILDFLAG(IS_WIN) |
| #include "third_party/skia/include/core/SkFontMgr.h" // nogncheck |
| #include "third_party/skia/include/ports/SkFontMgr_empty.h" // nogncheck |
| #endif |
| #endif |
| |
| #if BUILDFLAG(IS_APPLE) |
| #include "core/fxge/cfx_textrenderoptions.h" |
| #endif |
| |
| namespace { |
| |
| constexpr uint32_t kInvalidGlyphIndex = static_cast<uint32_t>(-1); |
| |
| constexpr int kMaxGlyphDimension = 2048; |
| |
| struct UniqueKeyGen { |
| void Generate(int count, ...); |
| |
| int key_len_; |
| char key_[128]; |
| }; |
| |
| void UniqueKeyGen::Generate(int count, ...) { |
| va_list argList; |
| va_start(argList, count); |
| for (int i = 0; i < count; i++) { |
| int p = va_arg(argList, int); |
| reinterpret_cast<uint32_t*>(key_)[i] = p; |
| } |
| va_end(argList); |
| key_len_ = count * sizeof(uint32_t); |
| } |
| |
| void GenKey(UniqueKeyGen* pKeyGen, |
| const CFX_Font* pFont, |
| const CFX_Matrix& matrix, |
| int dest_width, |
| int anti_alias, |
| bool bNative) { |
| int nMatrixA = static_cast<int>(matrix.a * 10000); |
| int nMatrixB = static_cast<int>(matrix.b * 10000); |
| int nMatrixC = static_cast<int>(matrix.c * 10000); |
| int nMatrixD = static_cast<int>(matrix.d * 10000); |
| |
| if (bNative) { |
| if (pFont->GetSubstFont()) { |
| pKeyGen->Generate(10, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width, |
| anti_alias, pFont->GetSubstFont()->m_Weight, |
| pFont->GetSubstFont()->m_ItalicAngle, |
| pFont->IsVertical(), 3); |
| } else { |
| pKeyGen->Generate(7, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width, |
| anti_alias, 3); |
| } |
| } else { |
| if (pFont->GetSubstFont()) { |
| pKeyGen->Generate(9, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width, |
| anti_alias, pFont->GetSubstFont()->m_Weight, |
| pFont->GetSubstFont()->m_ItalicAngle, |
| pFont->IsVertical()); |
| } else { |
| pKeyGen->Generate(6, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width, |
| anti_alias); |
| } |
| } |
| } |
| |
| } // namespace |
| |
| CFX_GlyphCache::CFX_GlyphCache(RetainPtr<CFX_Face> face) : m_Face(face) {} |
| |
| CFX_GlyphCache::~CFX_GlyphCache() = default; |
| |
| std::unique_ptr<CFX_GlyphBitmap> CFX_GlyphCache::RenderGlyph( |
| const CFX_Font* pFont, |
| uint32_t glyph_index, |
| bool bFontStyle, |
| const CFX_Matrix& matrix, |
| int dest_width, |
| int anti_alias) { |
| if (!GetFaceRec()) |
| return nullptr; |
| |
| FT_Matrix ft_matrix; |
| ft_matrix.xx = matrix.a / 64 * 65536; |
| ft_matrix.xy = matrix.c / 64 * 65536; |
| ft_matrix.yx = matrix.b / 64 * 65536; |
| ft_matrix.yy = matrix.d / 64 * 65536; |
| bool bUseCJKSubFont = false; |
| const CFX_SubstFont* pSubstFont = pFont->GetSubstFont(); |
| if (pSubstFont) { |
| bUseCJKSubFont = pSubstFont->m_bSubstCJK && bFontStyle; |
| int angle; |
| if (bUseCJKSubFont) |
| angle = pSubstFont->m_bItalicCJK ? -15 : 0; |
| else |
| angle = pSubstFont->m_ItalicAngle; |
| if (angle) { |
| int skew = CFX_Font::GetSkewFromAngle(angle); |
| if (pFont->IsVertical()) |
| ft_matrix.yx += ft_matrix.yy * skew / 100; |
| else |
| ft_matrix.xy -= ft_matrix.xx * skew / 100; |
| } |
| if (pSubstFont->IsBuiltInGenericFont()) { |
| pFont->AdjustMMParams(glyph_index, dest_width, |
| pFont->GetSubstFont()->m_Weight); |
| } |
| } |
| |
| ScopedFontTransform scoped_transform(GetFace(), &ft_matrix); |
| int load_flags = FT_LOAD_NO_BITMAP | FT_LOAD_PEDANTIC; |
| if (!(GetFaceRec()->face_flags & FT_FACE_FLAG_SFNT)) |
| load_flags |= FT_LOAD_NO_HINTING; |
| int error = FT_Load_Glyph(GetFaceRec(), glyph_index, load_flags); |
| if (error) { |
| // if an error is returned, try to reload glyphs without hinting. |
| if (load_flags & FT_LOAD_NO_HINTING) |
| return nullptr; |
| |
| load_flags |= FT_LOAD_NO_HINTING; |
| load_flags &= ~FT_LOAD_PEDANTIC; |
| error = FT_Load_Glyph(GetFaceRec(), glyph_index, load_flags); |
| if (error) |
| return nullptr; |
| } |
| |
| int weight; |
| if (bUseCJKSubFont) |
| weight = pSubstFont->m_WeightCJK; |
| else |
| weight = pSubstFont ? pSubstFont->m_Weight : 0; |
| if (pSubstFont && !pSubstFont->IsBuiltInGenericFont() && weight > 400) { |
| uint32_t index = (weight - 400) / 10; |
| pdfium::base::CheckedNumeric<signed long> level = |
| CFX_Font::GetWeightLevel(pSubstFont->m_Charset, index); |
| if (level.ValueOrDefault(-1) < 0) |
| return nullptr; |
| |
| level = level * |
| (abs(static_cast<int>(ft_matrix.xx)) + |
| abs(static_cast<int>(ft_matrix.xy))) / |
| 36655; |
| FT_Outline_Embolden(FXFT_Get_Glyph_Outline(GetFaceRec()), |
| level.ValueOrDefault(0)); |
| } |
| FT_Library_SetLcdFilter(CFX_GEModule::Get()->GetFontMgr()->GetFTLibrary(), |
| FT_LCD_FILTER_DEFAULT); |
| error = FXFT_Render_Glyph(GetFaceRec(), anti_alias); |
| if (error) |
| return nullptr; |
| |
| int bmwidth = FXFT_Get_Bitmap_Width(FXFT_Get_Glyph_Bitmap(GetFaceRec())); |
| int bmheight = FXFT_Get_Bitmap_Rows(FXFT_Get_Glyph_Bitmap(GetFaceRec())); |
| if (bmwidth > kMaxGlyphDimension || bmheight > kMaxGlyphDimension) |
| return nullptr; |
| int dib_width = bmwidth; |
| auto pGlyphBitmap = |
| std::make_unique<CFX_GlyphBitmap>(FXFT_Get_Glyph_BitmapLeft(GetFaceRec()), |
| FXFT_Get_Glyph_BitmapTop(GetFaceRec())); |
| pGlyphBitmap->GetBitmap()->Create(dib_width, bmheight, |
| anti_alias == FT_RENDER_MODE_MONO |
| ? FXDIB_Format::k1bppMask |
| : FXDIB_Format::k8bppMask); |
| int dest_pitch = pGlyphBitmap->GetBitmap()->GetPitch(); |
| int src_pitch = FXFT_Get_Bitmap_Pitch(FXFT_Get_Glyph_Bitmap(GetFaceRec())); |
| uint8_t* pDestBuf = pGlyphBitmap->GetBitmap()->GetBuffer().data(); |
| uint8_t* pSrcBuf = static_cast<uint8_t*>( |
| FXFT_Get_Bitmap_Buffer(FXFT_Get_Glyph_Bitmap(GetFaceRec()))); |
| if (anti_alias != FT_RENDER_MODE_MONO && |
| FXFT_Get_Bitmap_PixelMode(FXFT_Get_Glyph_Bitmap(GetFaceRec())) == |
| FT_PIXEL_MODE_MONO) { |
| int bytes = anti_alias == FT_RENDER_MODE_LCD ? 3 : 1; |
| for (int i = 0; i < bmheight; i++) { |
| for (int n = 0; n < bmwidth; n++) { |
| uint8_t data = |
| (pSrcBuf[i * src_pitch + n / 8] & (0x80 >> (n % 8))) ? 255 : 0; |
| for (int b = 0; b < bytes; b++) |
| pDestBuf[i * dest_pitch + n * bytes + b] = data; |
| } |
| } |
| } else { |
| memset(pDestBuf, 0, dest_pitch * bmheight); |
| int rowbytes = std::min(abs(src_pitch), dest_pitch); |
| for (int row = 0; row < bmheight; row++) |
| memcpy(pDestBuf + row * dest_pitch, pSrcBuf + row * src_pitch, rowbytes); |
| } |
| return pGlyphBitmap; |
| } |
| |
| const CFX_Path* CFX_GlyphCache::LoadGlyphPath(const CFX_Font* pFont, |
| uint32_t glyph_index, |
| int dest_width) { |
| if (!GetFaceRec() || glyph_index == kInvalidGlyphIndex) |
| return nullptr; |
| |
| const auto* pSubstFont = pFont->GetSubstFont(); |
| int weight = pSubstFont ? pSubstFont->m_Weight : 0; |
| int angle = pSubstFont ? pSubstFont->m_ItalicAngle : 0; |
| bool vertical = pSubstFont && pFont->IsVertical(); |
| const PathMapKey key = |
| std::make_tuple(glyph_index, dest_width, weight, angle, vertical); |
| auto it = m_PathMap.find(key); |
| if (it != m_PathMap.end()) |
| return it->second.get(); |
| |
| m_PathMap[key] = pFont->LoadGlyphPathImpl(glyph_index, dest_width); |
| return m_PathMap[key].get(); |
| } |
| |
| const CFX_GlyphBitmap* CFX_GlyphCache::LoadGlyphBitmap( |
| const CFX_Font* pFont, |
| uint32_t glyph_index, |
| bool bFontStyle, |
| const CFX_Matrix& matrix, |
| int dest_width, |
| int anti_alias, |
| CFX_TextRenderOptions* text_options) { |
| if (glyph_index == kInvalidGlyphIndex) |
| return nullptr; |
| |
| UniqueKeyGen keygen; |
| #if BUILDFLAG(IS_APPLE) |
| const bool bNative = text_options->native_text; |
| #else |
| const bool bNative = false; |
| #endif |
| GenKey(&keygen, pFont, matrix, dest_width, anti_alias, bNative); |
| ByteString FaceGlyphsKey(keygen.key_, keygen.key_len_); |
| |
| #if BUILDFLAG(IS_APPLE) |
| const bool bDoLookUp = !text_options->native_text || |
| CFX_DefaultRenderDevice::SkiaIsDefaultRenderer(); |
| #else |
| const bool bDoLookUp = true; |
| #endif |
| if (bDoLookUp) { |
| return LookUpGlyphBitmap(pFont, matrix, FaceGlyphsKey, glyph_index, |
| bFontStyle, dest_width, anti_alias); |
| } |
| |
| #if BUILDFLAG(IS_APPLE) |
| DCHECK(!CFX_DefaultRenderDevice::SkiaIsDefaultRenderer()); |
| |
| std::unique_ptr<CFX_GlyphBitmap> pGlyphBitmap; |
| auto it = m_SizeMap.find(FaceGlyphsKey); |
| if (it != m_SizeMap.end()) { |
| SizeGlyphCache* pSizeCache = &(it->second); |
| auto it2 = pSizeCache->find(glyph_index); |
| if (it2 != pSizeCache->end()) |
| return it2->second.get(); |
| |
| pGlyphBitmap = RenderGlyph_Nativetext(pFont, glyph_index, matrix, |
| dest_width, anti_alias); |
| if (pGlyphBitmap) { |
| CFX_GlyphBitmap* pResult = pGlyphBitmap.get(); |
| (*pSizeCache)[glyph_index] = std::move(pGlyphBitmap); |
| return pResult; |
| } |
| } else { |
| pGlyphBitmap = RenderGlyph_Nativetext(pFont, glyph_index, matrix, |
| dest_width, anti_alias); |
| if (pGlyphBitmap) { |
| CFX_GlyphBitmap* pResult = pGlyphBitmap.get(); |
| |
| SizeGlyphCache cache; |
| cache[glyph_index] = std::move(pGlyphBitmap); |
| |
| m_SizeMap[FaceGlyphsKey] = std::move(cache); |
| return pResult; |
| } |
| } |
| GenKey(&keygen, pFont, matrix, dest_width, anti_alias, /*bNative=*/false); |
| ByteString FaceGlyphsKey2(keygen.key_, keygen.key_len_); |
| text_options->native_text = false; |
| return LookUpGlyphBitmap(pFont, matrix, FaceGlyphsKey2, glyph_index, |
| bFontStyle, dest_width, anti_alias); |
| #endif // BUILDFLAG(IS_APPLE) |
| } |
| |
| #ifdef _SKIA_SUPPORT_ |
| CFX_TypeFace* CFX_GlyphCache::GetDeviceCache(const CFX_Font* pFont) { |
| if (!m_pTypeface) { |
| pdfium::span<const uint8_t> span = pFont->GetFontSpan(); |
| m_pTypeface = SkTypeface::MakeFromStream( |
| std::make_unique<SkMemoryStream>(span.data(), span.size())); |
| } |
| #if BUILDFLAG(IS_WIN) |
| if (!m_pTypeface) { |
| sk_sp<SkFontMgr> customMgr(SkFontMgr_New_Custom_Empty()); |
| pdfium::span<const uint8_t> span = pFont->GetFontSpan(); |
| m_pTypeface = customMgr->makeFromStream( |
| std::make_unique<SkMemoryStream>(span.data(), span.size())); |
| } |
| #endif // BUILDFLAG(IS_WIN) |
| return m_pTypeface.get(); |
| } |
| #endif // _SKIA_SUPPORT_ |
| |
| #if !BUILDFLAG(IS_APPLE) |
| void CFX_GlyphCache::InitPlatform() {} |
| #endif |
| |
| CFX_GlyphBitmap* CFX_GlyphCache::LookUpGlyphBitmap( |
| const CFX_Font* pFont, |
| const CFX_Matrix& matrix, |
| const ByteString& FaceGlyphsKey, |
| uint32_t glyph_index, |
| bool bFontStyle, |
| int dest_width, |
| int anti_alias) { |
| SizeGlyphCache* pSizeCache; |
| auto it = m_SizeMap.find(FaceGlyphsKey); |
| if (it == m_SizeMap.end()) { |
| m_SizeMap[FaceGlyphsKey] = SizeGlyphCache(); |
| pSizeCache = &(m_SizeMap[FaceGlyphsKey]); |
| } else { |
| pSizeCache = &(it->second); |
| } |
| |
| auto it2 = pSizeCache->find(glyph_index); |
| if (it2 != pSizeCache->end()) |
| return it2->second.get(); |
| |
| std::unique_ptr<CFX_GlyphBitmap> pGlyphBitmap = RenderGlyph( |
| pFont, glyph_index, bFontStyle, matrix, dest_width, anti_alias); |
| CFX_GlyphBitmap* pResult = pGlyphBitmap.get(); |
| (*pSizeCache)[glyph_index] = std::move(pGlyphBitmap); |
| return pResult; |
| } |
