/* * Copyright 2001-2016, Haiku. * Distributed under the terms of the MIT License. * * Authors: * DarkWyrm * Jérôme Duval, jerome.duval@free.fr * Michael Lotz * Stephan Aßmus */ #include "ServerFont.h" #include "Angle.h" #include "AppFontManager.h" #include "GlyphLayoutEngine.h" #include "GlobalFontManager.h" #include "truncate_string.h" #include "utf8_functions.h" #include FT_FREETYPE_H #include FT_GLYPH_H #include FT_OUTLINE_H #ifdef FONTCONFIG_ENABLED #include #include #endif // FONTCONFIG_ENABLED #include #include #include #include #include #include #include // functions needed to convert a freetype vector graphics to a BShape inline BPoint VectorToPoint(const FT_Vector *vector) { BPoint result; result.x = float(vector->x) / 64; result.y = -float(vector->y) / 64; return result; } int MoveToFunc(const FT_Vector *to, void *user) { ((BShape *)user)->MoveTo(VectorToPoint(to)); return 0; } int LineToFunc(const FT_Vector *to, void *user) { ((BShape *)user)->LineTo(VectorToPoint(to)); return 0; } int ConicToFunc(const FT_Vector *control, const FT_Vector *to, void *user) { BPoint controls[3]; controls[0] = VectorToPoint(control); controls[1] = controls[0]; controls[2] = VectorToPoint(to); ((BShape *)user)->BezierTo(controls); return 0; } int CubicToFunc(const FT_Vector *control1, const FT_Vector *control2, const FT_Vector *to, void *user) { BPoint controls[3]; controls[0] = VectorToPoint(control1); controls[1] = VectorToPoint(control2); controls[2] = VectorToPoint(to); ((BShape *)user)->BezierTo(controls); return 0; } inline bool is_white_space(uint32 charCode) { switch (charCode) { case 0x0009: /* tab */ case 0x000b: /* vertical tab */ case 0x000c: /* form feed */ case 0x0020: /* space */ case 0x00a0: /* non breaking space */ case 0x000a: /* line feed */ case 0x000d: /* carriage return */ case 0x2028: /* line separator */ case 0x2029: /* paragraph separator */ return true; } return false; } // #pragma mark - /*! \brief Constructor \param style Style object to which the ServerFont belongs \param size Character size in points \param rotation Rotation in degrees \param shear Shear (slant) in degrees. 45 <= shear <= 135 \param flags Style flags as defined in \param spacing String spacing flag as defined in */ ServerFont::ServerFont(FontStyle& style, float size, float rotation, float shear, float falseBoldWidth, uint16 flags, uint8 spacing) : fStyle(&style, false), fSize(size), fRotation(rotation), fShear(shear), fFalseBoldWidth(falseBoldWidth), fBounds(0, 0, 0, 0), fFlags(flags), fSpacing(spacing), fDirection(style.Direction()), fFace(style.Face()), fEncoding(B_UNICODE_UTF8) { } ServerFont::ServerFont() : fStyle(NULL) { *this = *gFontManager->DefaultPlainFont(); } /*! \brief Copy Constructor \param font ServerFont to copy */ ServerFont::ServerFont(const ServerFont &font) : fStyle(NULL) { *this = font; } /*! \brief Removes itself as a dependency of its owning style. */ ServerFont::~ServerFont() { } /*! \brief Returns a copy of the specified font \param The font to copy from. \return A copy of the specified font */ ServerFont& ServerFont::operator=(const ServerFont& font) { fSize = font.fSize; fRotation = font.fRotation; fShear = font.fShear; fFalseBoldWidth = font.fFalseBoldWidth; fFlags = font.fFlags; fSpacing = font.fSpacing; fEncoding = font.fEncoding; fBounds = font.fBounds; SetStyle(font.fStyle); fFace = font.fFace; return *this; } bool ServerFont::operator==(const ServerFont& other) const { if (GetFamilyAndStyle() != other.GetFamilyAndStyle()) return false; return fSize == other.fSize && fRotation == other.fRotation && fShear == other.fShear && fFalseBoldWidth == other.fFalseBoldWidth && fFlags == other.fFlags && fSpacing == other.fSpacing && fEncoding == other.fEncoding && fBounds == other.fBounds && fDirection == other.fDirection && fFace == other.fFace; } /*! \brief Returns the number of strikes in the font \return The number of strikes in the font */ int32 ServerFont::CountTuned() { return fStyle->TunedCount(); } /*! \brief Returns the file format of the font. \return Mostly B_TRUETYPE_WINDOWS :) */ font_file_format ServerFont::FileFormat() { return fStyle->FileFormat(); } const char* ServerFont::Style() const { return fStyle->Name(); } const char* ServerFont::Family() const { return fStyle->Family()->Name(); } void ServerFont::SetStyle(FontStyle* style) { if (style && style != fStyle) { fStyle.SetTo(style, false); fFace = fStyle->PreservedFace(fFace); fDirection = fStyle->Direction(); // invalidate fBounds fBounds.Set(0, -1, 0, -1); } } /*! \brief Sets the ServerFont instance to whatever font is specified This method will lock the font manager. \param familyID ID number of the family to set \param styleID ID number of the style to set \return B_OK if successful, B_ERROR if not */ status_t ServerFont::SetFamilyAndStyle(uint16 familyID, uint16 styleID, AppFontManager* fontManager) { BReference style; if (gFontManager->Lock()) { style.SetTo(gFontManager->GetStyle(familyID, styleID), false); gFontManager->Unlock(); } if (style == NULL) { if (fontManager != NULL && fontManager->Lock()) { style.SetTo(fontManager->GetStyle(familyID, styleID), false); fontManager->Unlock(); } if (style == NULL) return B_ERROR; } SetStyle(style); // invalidate fBounds fBounds.Set(0, -1, 0, -1); return B_OK; } /*! \brief Sets the ServerFont instance to whatever font is specified \param fontID the combination of family and style ID numbers \return B_OK if successful, B_ERROR if not */ status_t ServerFont::SetFamilyAndStyle(uint32 fontID, AppFontManager* fontManager) { uint16 style = fontID & 0xFFFF; uint16 family = (fontID & 0xFFFF0000) >> 16; return SetFamilyAndStyle(family, style, fontManager); } void ServerFont::SetSize(float value) { fSize = value; // invalidate fBounds fBounds.Set(0, -1, 0, -1); } status_t ServerFont::SetFace(uint16 face) { // Don't confuse the Be API "face" with the Freetype face, which is just // an index in case a single font file exports multiple font faces. The // FontStyle class takes care of mapping the font style name to the Be // API face flags in FontStyle::_TranslateStyleToFace(). if (fStyle->PreservedFace(face) == face) { fFace = face; return B_OK; } BReference style; uint16 familyID = FamilyID(); if (gFontManager->Lock()) { int32 count = gFontManager->CountStyles(familyID); for (int32 i = 0; i < count; i++) { style.SetTo(gFontManager->GetStyleByIndex(familyID, i), false); if (style == NULL) break; if (style->PreservedFace(face) == face) break; else style = NULL; } gFontManager->Unlock(); } if (!style) return B_ERROR; fFace = face; SetStyle(style); // invalidate fBounds fBounds.Set(0, -1, 0, -1); return B_OK; } /*! \brief Gets the ID values for the ServerFont instance in one shot \return the combination of family and style ID numbers */ uint32 ServerFont::GetFamilyAndStyle() const { if (fStyle == NULL || fStyle->Family() == NULL) return 0; return (FamilyID() << 16) | StyleID(); } FT_Face ServerFont::GetTransformedFace(bool rotate, bool shear) const { fStyle->Lock(); FT_Face face = fStyle->FreeTypeFace(); if (!face) { fStyle->Unlock(); return NULL; } FT_Set_Char_Size(face, 0, int32(fSize * 64), 72, 72); if ((rotate && fRotation != 0) || (shear && fShear != 90)) { FT_Matrix rmatrix, smatrix; Angle rotationAngle(fRotation); rmatrix.xx = (FT_Fixed)( rotationAngle.Cosine() * 0x10000); rmatrix.xy = (FT_Fixed)(-rotationAngle.Sine() * 0x10000); rmatrix.yx = (FT_Fixed)( rotationAngle.Sine() * 0x10000); rmatrix.yy = (FT_Fixed)( rotationAngle.Cosine() * 0x10000); Angle shearAngle(fShear); smatrix.xx = (FT_Fixed)(0x10000); smatrix.xy = (FT_Fixed)(-shearAngle.Cosine() * 0x10000); smatrix.yx = (FT_Fixed)(0); smatrix.yy = (FT_Fixed)(0x10000); // Multiply togheter and apply transform FT_Matrix_Multiply(&rmatrix, &smatrix); FT_Set_Transform(face, &smatrix, NULL); } // fStyle will be unlocked in PutTransformedFace() return face; } void ServerFont::PutTransformedFace(FT_Face face) const { // Reset transformation FT_Set_Transform(face, NULL, NULL); fStyle->Unlock(); } status_t ServerFont::GetGlyphShapes(const char charArray[], int32 numChars, BShape* shapeArray[]) const { if (!charArray || numChars <= 0 || !shapeArray) return B_BAD_DATA; FT_Face face = GetTransformedFace(true, true); if (!face) return B_ERROR; FT_Outline_Funcs funcs; funcs.move_to = MoveToFunc; funcs.line_to = LineToFunc; funcs.conic_to = ConicToFunc; funcs.cubic_to = CubicToFunc; funcs.shift = 0; funcs.delta = 0; const char* string = charArray; for (int i = 0; i < numChars; i++) { shapeArray[i] = new (std::nothrow) BShape(); if (shapeArray[i] == NULL) { PutTransformedFace(face); return B_NO_MEMORY; } FT_Load_Char(face, UTF8ToCharCode(&string), FT_LOAD_NO_BITMAP); FT_Outline outline = face->glyph->outline; FT_Outline_Decompose(&outline, &funcs, shapeArray[i]); shapeArray[i]->Close(); } PutTransformedFace(face); return B_OK; } #ifdef FONTCONFIG_ENABLED /*! \brief For a given codepoint, do a binary search of the defined unicode blocks to figure out which one contains the codepoint. \param codePoint is the point to find \param startGuess is the starting point for the binary search (default 0) */ static int32 FindBlockForCodepoint(uint32 codePoint, uint32 startGuess) { uint32 min = 0; uint32 max = kNumUnicodeBlockRanges; uint32 guess = (max + min) / 2; if (startGuess > 0) guess = startGuess; if (codePoint > kUnicodeBlockMap[max-1].end) return -1; while ((max >= min) && (guess < kNumUnicodeBlockRanges)) { uint32 start = kUnicodeBlockMap[guess].start; uint32 end = kUnicodeBlockMap[guess].end; if (start <= codePoint && end >= codePoint) return guess; if (end < codePoint) { min = guess + 1; } else { max = guess - 1; } guess = (max + min) / 2; } return -1; } /*! \brief parses charmap from fontconfig. See fontconfig docs for FcCharSetFirstPage and FcCharSetNextPage for details on format. \param charMap is a fontconfig character map \param baseCodePoint is the base codepoint returned by fontconfig \param blocksForMap is a unicode_block to store the bitmap of contained blocks */ static void ParseFcMap(FcChar32 charMap[], FcChar32 baseCodePoint, unicode_block& blocksForMap) { uint32 block = 0; const uint8 BITS_PER_BLOCK = 32; uint32 currentCodePoint = 0; if (baseCodePoint > kUnicodeBlockMap[kNumUnicodeBlockRanges-1].end) return; for (int i = 0; i < FC_CHARSET_MAP_SIZE; ++i) { FcChar32 curMapBlock = charMap[i]; int32 rangeStart = -1; int32 startBlock = -1; int32 endBlock = -1; uint32 startPoint = 0; currentCodePoint = baseCodePoint + block; for (int bit = 0; bit < BITS_PER_BLOCK; ++bit) { if (curMapBlock == 0 && startBlock < 0) // if no more bits are set then short-circuit the loop break; if ((curMapBlock & 0x1) != 0 && rangeStart < 0) { rangeStart = bit; startPoint = currentCodePoint + rangeStart; startBlock = FindBlockForCodepoint(startPoint, 0); if (startBlock >= 0) { blocksForMap = blocksForMap | kUnicodeBlockMap[startBlock].block; } } else if (rangeStart >= 0 && startBlock >= 0) { // when we find an empty bit, that's the end of the range uint32 endPoint = currentCodePoint + (bit - 1); endBlock = FindBlockForCodepoint(endPoint, startBlock); // start the binary search at the block where we found the // start codepoint to ideally find the end in the same // block. ++startBlock; while (startBlock <= endBlock) { // if the starting codepoint is found in a different block // than the ending codepoint, we should add all the blocks // inbetween. blocksForMap = blocksForMap | kUnicodeBlockMap[startBlock].block; ++startBlock; } startBlock = -1; endBlock = -1; rangeStart = -1; } curMapBlock >>= 1; } if (rangeStart >= 0 && startBlock >= 0) { // if we hit the end of the block and had // found a start of the range then we // should end the range at the end of the block uint32 endPoint = currentCodePoint + BITS_PER_BLOCK - 1; endBlock = FindBlockForCodepoint(endPoint, startBlock); // start the binary search at the block where we found the // start codepoint to ideally find the end in the same // block. ++startBlock; while (startBlock <= endBlock) { // if the starting codepoint is found in a different block // than the ending codepoint, we should add all the blocks // inbetween. blocksForMap = blocksForMap | kUnicodeBlockMap[startBlock].block; ++startBlock; } } block += BITS_PER_BLOCK; } } #endif // FONTCONFIG_ENABLED /*! \brief Gets a bitmap that indicates which Unicode blocks are in the font. \param unicode_block to store bitmap in \return B_OK; bitmap will be empty if something went wrong */ status_t ServerFont::GetUnicodeBlocks(unicode_block& blocksForFont) { blocksForFont = unicode_block(); #ifdef FONTCONFIG_ENABLED FT_Face face = GetTransformedFace(true, true); if (face == NULL) return B_ERROR; FcCharSet *charSet = FcFreeTypeCharSet(face, NULL); if (charSet == NULL) { PutTransformedFace(face); return B_ERROR; } FcChar32 charMap[FC_CHARSET_MAP_SIZE]; FcChar32 next = 0; FcChar32 baseCodePoint = FcCharSetFirstPage(charSet, charMap, &next); while ((baseCodePoint != FC_CHARSET_DONE) && (next != FC_CHARSET_DONE)) { ParseFcMap(charMap, baseCodePoint, blocksForFont); baseCodePoint = FcCharSetNextPage(charSet, charMap, &next); } FcCharSetDestroy(charSet); PutTransformedFace(face); #endif // FONTCONFIG_ENABLED return B_OK; } /*! \brief Checks if a unicode block specified by a start and end point is defined in the current font \param start of unicode block \param end of unicode block \param hasBlock boolean to store whether the font contains the specified block \return B_OK; hasBlock will be false if something goes wrong */ status_t ServerFont::IncludesUnicodeBlock(uint32 start, uint32 end, bool& hasBlock) { hasBlock = false; #ifdef FONTCONFIG_ENABLED FT_Face face = GetTransformedFace(true, true); if (face == NULL) return B_ERROR; FcCharSet *charSet = FcFreeTypeCharSet(face, NULL); if (charSet == NULL) { PutTransformedFace(face); return B_ERROR; } uint32 curCodePoint = start; while (curCodePoint <= end && hasBlock == false) { // loop through range; if any character in the range is in the charset // then the block is represented. if (FcCharSetHasChar(charSet, (FcChar32)curCodePoint) == FcTrue) { hasBlock = true; break; } ++curCodePoint; } FcCharSetDestroy(charSet); PutTransformedFace(face); #endif // FONTCONFIG_ENABLED return B_OK; } status_t ServerFont::GetHasGlyphs(const char* string, int32 numBytes, int32 numChars, bool* hasArray, bool useFallbacks) const { if (string == NULL || numBytes <= 0 || numChars <= 0 || hasArray == NULL) return B_BAD_DATA; FontCacheEntry* entry = NULL; FontCacheReference cacheReference; BObjectList fallbacks(21, true); entry = GlyphLayoutEngine::FontCacheEntryFor(*this, false); if (entry == NULL) return B_ERROR; cacheReference.SetTo(entry); uint32 charCode; int32 charIndex = 0; const char* start = string; while (charIndex < numChars && (charCode = UTF8ToCharCode(&string)) != 0) { hasArray[charIndex] = entry->CanCreateGlyph(charCode); if (hasArray[charIndex] == false && useFallbacks) { if (fallbacks.IsEmpty()) GlyphLayoutEngine::PopulateFallbacks(fallbacks, *this, false); if (GlyphLayoutEngine::GetFallbackReference(fallbacks, charCode) != NULL) hasArray[charIndex] = true; } charIndex++; if (string - start + 1 > numBytes) break; } return B_OK; } class EdgesConsumer { public: EdgesConsumer(edge_info* edges, float size) : fEdges(edges), fSize(size) { } bool NeedsVector() { return false; } void Start() {} void Finish(double x, double y) {} void ConsumeEmptyGlyph(int32 index, uint32 charCode, double x, double y) { fEdges[index].left = 0.0; fEdges[index].right = 0.0; } bool ConsumeGlyph(int32 index, uint32 charCode, const GlyphCache* glyph, FontCacheEntry* entry, double x, double y, double advanceX, double advanceY) { fEdges[index].left = glyph->inset_left / fSize; fEdges[index].right = glyph->inset_right / fSize; return true; } private: edge_info* fEdges; float fSize; }; status_t ServerFont::GetEdges(const char* string, int32 numBytes, int32 numChars, edge_info* edges) const { if (string == NULL || numBytes <= 0 || numChars <= 0 || edges == NULL) return B_BAD_DATA; EdgesConsumer consumer(edges, fSize); if (GlyphLayoutEngine::LayoutGlyphs(consumer, *this, string, numBytes, numChars, NULL, fSpacing)) { return B_OK; } return B_ERROR; // FT_Face face = GetTransformedFace(false, false); // if (!face) // return B_ERROR; // // const char *string = charArray; // for (int i = 0; i < numChars; i++) { // FT_Load_Char(face, UTF8ToCharCode(&string), FT_LOAD_NO_BITMAP); // edgeArray[i].left = float(face->glyph->metrics.horiBearingX) // / 64 / fSize; // edgeArray[i].right = float(face->glyph->metrics.horiBearingX // + face->glyph->metrics.width - face->glyph->metrics.horiAdvance) // / 64 / fSize; // } // // PutTransformedFace(face); // return B_OK; } class BPointEscapementConsumer { public: BPointEscapementConsumer(BPoint* escapements, BPoint* offsets, float size) : fEscapements(escapements), fOffsets(offsets), fSize(size) { } bool NeedsVector() { return false; } void Start() {} void Finish(double x, double y) {} void ConsumeEmptyGlyph(int32 index, uint32 charCode, double x, double y) { _Set(index, 0, 0); } bool ConsumeGlyph(int32 index, uint32 charCode, const GlyphCache* glyph, FontCacheEntry* entry, double x, double y, double advanceX, double advanceY) { return _Set(index, advanceX, advanceY); } private: inline bool _Set(int32 index, double x, double y) { fEscapements[index].x = x / fSize; fEscapements[index].y = y / fSize; if (fOffsets) { // ToDo: According to the BeBook: "The offsetArray is applied by // the dynamic spacing in order to improve the relative position // of the character's width with relation to another character, // without altering the width." So this will probably depend on // the spacing mode. fOffsets[index].x = 0; fOffsets[index].y = 0; } return true; } BPoint* fEscapements; BPoint* fOffsets; float fSize; }; status_t ServerFont::GetEscapements(const char* string, int32 numBytes, int32 numChars, escapement_delta delta, BPoint escapementArray[], BPoint offsetArray[]) const { if (string == NULL || numBytes <= 0 || numChars <= 0 || escapementArray == NULL) { return B_BAD_DATA; } BPointEscapementConsumer consumer(escapementArray, offsetArray, fSize); if (GlyphLayoutEngine::LayoutGlyphs(consumer, *this, string, numBytes, numChars, &delta, fSpacing)) { return B_OK; } return B_ERROR; } class WidthEscapementConsumer { public: WidthEscapementConsumer(float* widths, float size) : fWidths(widths), fSize(size) { } bool NeedsVector() { return false; } void Start() {} void Finish(double x, double y) {} void ConsumeEmptyGlyph(int32 index, uint32 charCode, double x, double y) { fWidths[index] = 0.0; } bool ConsumeGlyph(int32 index, uint32 charCode, const GlyphCache* glyph, FontCacheEntry* entry, double x, double y, double advanceX, double advanceY) { fWidths[index] = advanceX / fSize; return true; } private: float* fWidths; float fSize; }; status_t ServerFont::GetEscapements(const char* string, int32 numBytes, int32 numChars, escapement_delta delta, float widthArray[]) const { if (string == NULL || numBytes <= 0 || numChars <= 0 || widthArray == NULL) return B_BAD_DATA; WidthEscapementConsumer consumer(widthArray, fSize); if (GlyphLayoutEngine::LayoutGlyphs(consumer, *this, string, numBytes, numChars, &delta, fSpacing)) { return B_OK; } return B_ERROR; } class BoundingBoxConsumer { public: BoundingBoxConsumer(Transformable& transform, BRect* rectArray, bool asString) : rectArray(rectArray), stringBoundingBox(INT32_MAX, INT32_MAX, INT32_MIN, INT32_MIN), fAsString(asString), fCurves(fPathAdaptor), fContour(fCurves), fTransformedOutline(fCurves, transform), fTransformedContourOutline(fContour, transform), fTransform(transform) { } bool NeedsVector() { return false; } void Start() {} void Finish(double x, double y) {} void ConsumeEmptyGlyph(int32 index, uint32 charCode, double x, double y) {} bool ConsumeGlyph(int32 index, uint32 charCode, const GlyphCache* glyph, FontCacheEntry* entry, double x, double y, double advanceX, double advanceY) { if (glyph->data_type != glyph_data_outline) { const agg::rect_i& r = glyph->bounds; if (fAsString) { if (rectArray) { rectArray[index].left = r.x1 + x; rectArray[index].top = r.y1 + y; rectArray[index].right = r.x2 + x + 1; rectArray[index].bottom = r.y2 + y + 1; } else { stringBoundingBox = stringBoundingBox | BRect(r.x1 + x, r.y1 + y, r.x2 + x + 1, r.y2 + y + 1); } } else { rectArray[index].left = r.x1; rectArray[index].top = r.y1; rectArray[index].right = r.x2 + 1; rectArray[index].bottom = r.y2 + 1; } } else { if (fAsString) { entry->InitAdaptors(glyph, x, y, fMonoAdaptor, fGray8Adaptor, fPathAdaptor); } else { entry->InitAdaptors(glyph, 0, 0, fMonoAdaptor, fGray8Adaptor, fPathAdaptor); } double left = 0.0; double top = 0.0; double right = -1.0; double bottom = -1.0; uint32 pathID[1]; pathID[0] = 0; // TODO: use fContour if falseboldwidth is > 0 agg::bounding_rect(fTransformedOutline, pathID, 0, 1, &left, &top, &right, &bottom); if (rectArray) { rectArray[index] = BRect(left, top, right, bottom); } else { stringBoundingBox = stringBoundingBox | BRect(left, top, right, bottom); } } return true; } BRect* rectArray; BRect stringBoundingBox; private: bool fAsString; FontCacheEntry::GlyphPathAdapter fPathAdaptor; FontCacheEntry::GlyphGray8Adapter fGray8Adaptor; FontCacheEntry::GlyphMonoAdapter fMonoAdaptor; FontCacheEntry::CurveConverter fCurves; FontCacheEntry::ContourConverter fContour; FontCacheEntry::TransformedOutline fTransformedOutline; FontCacheEntry::TransformedContourOutline fTransformedContourOutline; Transformable& fTransform; }; status_t ServerFont::GetBoundingBoxes(const char* string, int32 numBytes, int32 numChars, BRect rectArray[], bool stringEscapement, font_metric_mode mode, escapement_delta delta, bool asString) { // TODO: The font_metric_mode is not used if (string == NULL || numBytes <= 0 || numChars <= 0 || rectArray == NULL) return B_BAD_DATA; Transformable transform(EmbeddedTransformation()); BoundingBoxConsumer consumer(transform, rectArray, asString); if (GlyphLayoutEngine::LayoutGlyphs(consumer, *this, string, numBytes, numChars, stringEscapement ? &delta : NULL, fSpacing)) { return B_OK; } return B_ERROR; } status_t ServerFont::GetBoundingBoxesForStrings(char *charArray[], size_t lengthArray[], int32 numStrings, BRect rectArray[], font_metric_mode mode, escapement_delta deltaArray[]) { // TODO: The font_metric_mode is never used if (charArray == NULL || lengthArray == NULL || numStrings <= 0 || rectArray == NULL || deltaArray == NULL) { return B_BAD_DATA; } Transformable transform(EmbeddedTransformation()); for (int32 i = 0; i < numStrings; i++) { size_t numBytes = lengthArray[i]; const char* string = charArray[i]; escapement_delta delta = deltaArray[i]; BoundingBoxConsumer consumer(transform, NULL, true); if (!GlyphLayoutEngine::LayoutGlyphs(consumer, *this, string, numBytes, INT32_MAX, &delta, fSpacing)) { return B_ERROR; } rectArray[i] = consumer.stringBoundingBox; } return B_OK; } class StringWidthConsumer { public: StringWidthConsumer() : width(0.0) { } bool NeedsVector() { return false; } void Start() {} void Finish(double x, double y) { width = x; } void ConsumeEmptyGlyph(int32 index, uint32 charCode, double x, double y) {} bool ConsumeGlyph(int32 index, uint32 charCode, const GlyphCache* glyph, FontCacheEntry* entry, double x, double y, double advanceX, double advanceY) { return true; } float width; }; float ServerFont::StringWidth(const char *string, int32 numBytes, const escapement_delta* deltaArray) const { if (!string || numBytes <= 0) return 0.0; StringWidthConsumer consumer; if (!GlyphLayoutEngine::LayoutGlyphs(consumer, *this, string, numBytes, INT32_MAX, deltaArray, fSpacing)) { return 0.0; } return consumer.width; } /*! \brief Returns a BRect which encloses the entire font \return A BRect which encloses the entire font */ BRect ServerFont::BoundingBox() { FT_Face face = fStyle->FreeTypeFace(); if (fBounds.IsValid() && fBounds.IntegerWidth() > 0 && fBounds.IntegerHeight() > 0) return fBounds; // if font has vector outlines, get the bounding box // from freetype and scale it by the font size if (IsScalable()) { FT_BBox bounds = face->bbox; fBounds.left = (float)bounds.xMin / (float)face->units_per_EM; fBounds.right = (float)bounds.xMax / (float)face->units_per_EM; fBounds.top = (float)bounds.yMin / (float)face->units_per_EM; fBounds.bottom = (float)bounds.yMax / (float)face->units_per_EM; float scaledWidth = fBounds.Width() * fSize; float scaledHeight = fBounds.Height() * fSize; fBounds.InsetBy((fBounds.Width() - scaledWidth) / 2.f, (fBounds.Height() - scaledHeight) / 2.f); } else { // otherwise find the bitmap that is closest in size // to the requested size float pixelSize = fSize * 64.f; float minDelta = abs(face->available_sizes[0].size - pixelSize); float width = face->available_sizes[0].x_ppem; float height = face->available_sizes[0].y_ppem; for (int i = 1; i < face->num_fixed_sizes; ++i) { float delta = abs(face->available_sizes[i].size - pixelSize); if (delta < minDelta) { width = face->available_sizes[i].x_ppem; height = face->available_sizes[i].y_ppem; } } fBounds.top = 0; fBounds.left = 0; fBounds.right = width / 64.f; fBounds.bottom = height / 64.f; } return fBounds; } /*! \brief Obtains the height values for characters in the font in its current state \param fh pointer to a font_height object to receive the values for the font */ void ServerFont::GetHeight(font_height& height) const { fStyle->GetHeight(fSize, height); } void ServerFont::TruncateString(BString* inOut, uint32 mode, float width) const { if (!inOut) return; // the width of the "…" glyph float ellipsisWidth = StringWidth(B_UTF8_ELLIPSIS, strlen(B_UTF8_ELLIPSIS)); // count the individual glyphs int32 numChars = inOut->CountChars(); // get the escapement of each glyph in font units float* escapementArray = new (std::nothrow) float[numChars]; if (escapementArray == NULL) return; static escapement_delta delta = (escapement_delta){ 0.0, 0.0 }; if (GetEscapements(inOut->String(), inOut->Length(), numChars, delta, escapementArray) == B_OK) { truncate_string(*inOut, mode, width, escapementArray, fSize, ellipsisWidth, numChars); } delete[] escapementArray; } Transformable ServerFont::EmbeddedTransformation() const { // TODO: cache this? Transformable transform; transform.ShearBy(B_ORIGIN, (90.0 - fShear) * M_PI / 180.0, 0.0); transform.RotateBy(B_ORIGIN, -fRotation * M_PI / 180.0); return transform; } void ServerFont::SetFontData(FT_Byte* location, uint32 size) { if (fStyle != NULL) fStyle->SetFontData(location, size); }