| /* | |
| ** Copyright 2006, The Android Open Source Project | |
| ** | |
| ** Licensed under the Apache License, Version 2.0 (the "License"); | |
| ** you may not use this file except in compliance with the License. | |
| ** You may obtain a copy of the License at | |
| ** | |
| ** http://www.apache.org/licenses/LICENSE-2.0 | |
| ** | |
| ** Unless required by applicable law or agreed to in writing, software | |
| ** distributed under the License is distributed on an "AS IS" BASIS, | |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| ** See the License for the specific language governing permissions and | |
| ** limitations under the License. | |
| */ | |
| #include "SkString.h" | |
| //#include "SkStream.h" | |
| #include "SkFontHost.h" | |
| #include "SkDescriptor.h" | |
| #include "SkAdvancedTypefaceMetrics.h" | |
| #include "SkStream.h" | |
| #include "SkThread.h" | |
| #include "SkUtils.h" | |
| #ifdef WIN32 | |
| #include "windows.h" | |
| #include "tchar.h" | |
| #include "Usp10.h" | |
| // client3d has to undefine this for now | |
| #define CAN_USE_LOGFONT_NAME | |
| using namespace skia_advanced_typeface_metrics_utils; | |
| static SkMutex gFTMutex; | |
| static const uint16_t BUFFERSIZE = (16384 - 32); | |
| static uint8_t glyphbuf[BUFFERSIZE]; | |
| // Give 1MB font cache budget | |
| #define FONT_CACHE_MEMORY_BUDGET (1024 * 1024) | |
| static inline FIXED SkFixedToFIXED(SkFixed x) { | |
| return *(FIXED*)(&x); | |
| } | |
| static inline FIXED SkScalarToFIXED(SkScalar x) { | |
| return SkFixedToFIXED(SkScalarToFixed(x)); | |
| } | |
| static SkTypeface::Style GetFontStyle(const LOGFONT& lf) { | |
| int style = SkTypeface::kNormal; | |
| if (lf.lfWeight == FW_SEMIBOLD || lf.lfWeight == FW_DEMIBOLD || lf.lfWeight == FW_BOLD) | |
| style |= SkTypeface::kBold; | |
| if (lf.lfItalic) | |
| style |= SkTypeface::kItalic; | |
| return (SkTypeface::Style)style; | |
| } | |
| // have to do this because SkTypeface::SkTypeface() is protected | |
| class LogFontTypeface : public SkTypeface { | |
| private: | |
| static SkMutex gMutex; | |
| static LogFontTypeface* gHead; | |
| static int32_t gCurrId; | |
| LogFontTypeface* fNext; | |
| LOGFONT fLogFont; | |
| public: | |
| LogFontTypeface(Style style, const LOGFONT& logFont) : | |
| SkTypeface(style, sk_atomic_inc(&gCurrId)+1), // 0 id is reserved so add 1 | |
| fLogFont(logFont) | |
| { | |
| SkAutoMutexAcquire am(gMutex); | |
| fNext = gHead; | |
| gHead = this; | |
| } | |
| const LOGFONT& logFont() const { return fLogFont; } | |
| virtual ~LogFontTypeface() { | |
| SkAutoMutexAcquire am(gMutex); | |
| if (gHead == this) { | |
| gHead = fNext; | |
| return; | |
| } | |
| LogFontTypeface* prev = gHead; | |
| SkASSERT(prev); | |
| while (prev->fNext != this) { | |
| prev = prev->fNext; | |
| SkASSERT(prev); | |
| } | |
| prev->fNext = fNext; | |
| } | |
| static LogFontTypeface* FindById(uint32_t id){ | |
| SkASSERT(gHead); | |
| LogFontTypeface* curr = gHead; | |
| while (curr->uniqueID() != id) { | |
| curr = curr->fNext; | |
| SkASSERT(curr); | |
| } | |
| return curr; | |
| } | |
| static LogFontTypeface* FindByLogFont(const LOGFONT& lf) | |
| { | |
| LogFontTypeface* curr = gHead; | |
| while (curr && memcmp(&curr->fLogFont, &lf, sizeof(LOGFONT))) { | |
| curr = curr->fNext; | |
| } | |
| return curr; | |
| } | |
| }; | |
| LogFontTypeface* LogFontTypeface::gHead; | |
| int32_t LogFontTypeface::gCurrId; | |
| SkMutex LogFontTypeface::gMutex; | |
| static const LOGFONT& get_default_font() { | |
| static LOGFONT gDefaultFont; | |
| // don't hardcode on Windows, Win2000, XP, Vista, and international all have different default | |
| // and the user could change too | |
| // lfMessageFont is garbage on my XP, so skip for now | |
| #if 0 | |
| if (gDefaultFont.lfFaceName[0] != 0) { | |
| return gDefaultFont; | |
| } | |
| NONCLIENTMETRICS ncm; | |
| ncm.cbSize = sizeof(NONCLIENTMETRICS); | |
| SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(ncm), &ncm, 0); | |
| //memcpy(&gDefaultFont, &(ncm.lfMessageFont), sizeof(LOGFONT)); | |
| #endif | |
| return gDefaultFont; | |
| } | |
| static SkTypeface* CreateTypeface_(const LOGFONT& lf) { | |
| LogFontTypeface* ptypeface = LogFontTypeface::FindByLogFont(lf); | |
| if (NULL == ptypeface) { | |
| SkTypeface::Style style = GetFontStyle(lf); | |
| ptypeface = new LogFontTypeface(style, lf); | |
| } else { | |
| ptypeface->ref(); | |
| } | |
| return ptypeface; | |
| } | |
| uint32_t SkFontHost::NextLogicalFont(uint32_t fontID) { | |
| // Zero means that we don't have any fallback fonts for this fontID. | |
| // This function is implemented on Android, but doesn't have much | |
| // meaning here. | |
| return 0; | |
| } | |
| class SkScalerContext_Windows : public SkScalerContext { | |
| public: | |
| SkScalerContext_Windows(const SkDescriptor* desc); | |
| virtual ~SkScalerContext_Windows(); | |
| protected: | |
| virtual unsigned generateGlyphCount() const; | |
| virtual uint16_t generateCharToGlyph(SkUnichar uni); | |
| virtual void generateAdvance(SkGlyph* glyph); | |
| virtual void generateMetrics(SkGlyph* glyph); | |
| virtual void generateImage(const SkGlyph& glyph); | |
| virtual void generatePath(const SkGlyph& glyph, SkPath* path); | |
| virtual void generateLineHeight(SkPoint* ascent, SkPoint* descent); | |
| virtual void generateFontMetrics(SkPaint::FontMetrics* mX, SkPaint::FontMetrics* mY); | |
| //virtual SkDeviceContext getDC() {return ddc;} | |
| private: | |
| LOGFONT lf; | |
| MAT2 mat22; | |
| HDC ddc; | |
| HFONT savefont; | |
| HFONT font; | |
| SCRIPT_CACHE sc; | |
| }; | |
| SkScalerContext_Windows::SkScalerContext_Windows(const SkDescriptor* desc) | |
| : SkScalerContext(desc), ddc(0), font(0), savefont(0), sc(0) { | |
| SkAutoMutexAcquire ac(gFTMutex); | |
| lf = LogFontTypeface::FindById(fRec.fFontID)->logFont(); | |
| mat22.eM11 = SkScalarToFIXED(fRec.fPost2x2[0][0]); | |
| mat22.eM12 = SkScalarToFIXED(-fRec.fPost2x2[0][1]); | |
| mat22.eM21 = SkScalarToFIXED(fRec.fPost2x2[1][0]); | |
| mat22.eM22 = SkScalarToFIXED(-fRec.fPost2x2[1][1]); | |
| ddc = ::CreateCompatibleDC(NULL); | |
| SetBkMode(ddc, TRANSPARENT); | |
| // Scaling by the DPI is inconsistent with how Skia draws elsewhere | |
| //SkScalar height = -(fRec.fTextSize * GetDeviceCaps(ddc, LOGPIXELSY) / 72); | |
| SkScalar height = -fRec.fTextSize; | |
| lf.lfHeight = SkScalarRound(height); | |
| font = CreateFontIndirect(&lf); | |
| savefont = (HFONT)SelectObject(ddc, font); | |
| } | |
| SkScalerContext_Windows::~SkScalerContext_Windows() { | |
| if (ddc) { | |
| ::SelectObject(ddc, savefont); | |
| ::DeleteDC(ddc); | |
| ddc = NULL; | |
| } | |
| if (font) { | |
| ::DeleteObject(font); | |
| } | |
| if (sc) { | |
| ::ScriptFreeCache(&sc); | |
| } | |
| } | |
| unsigned SkScalerContext_Windows::generateGlyphCount() const { | |
| return 0xFFFF; | |
| // return fFace->num_glyphs; | |
| } | |
| uint16_t SkScalerContext_Windows::generateCharToGlyph(SkUnichar uni) { | |
| uint16_t index = 0; | |
| WCHAR c[2]; | |
| // TODO(ctguil): Support characters that generate more than one glyph. | |
| if (SkUTF16_FromUnichar(uni, (uint16_t*)c) == 1) { | |
| // Type1 fonts fail with uniscribe API. Use GetGlyphIndices for plane 0. | |
| SkAssertResult(GetGlyphIndicesW(ddc, c, 1, &index, 0)); | |
| } else { | |
| // Use uniscribe to detemine glyph index for non-BMP characters. | |
| // Need to add extra item to SCRIPT_ITEM to work around a bug in older | |
| // windows versions. https://bugzilla.mozilla.org/show_bug.cgi?id=366643 | |
| SCRIPT_ITEM si[2 + 1]; | |
| int items; | |
| SkAssertResult( | |
| SUCCEEDED(ScriptItemize(c, 2, 2, NULL, NULL, si, &items))); | |
| WORD log[2]; | |
| SCRIPT_VISATTR vsa; | |
| int glyphs; | |
| SkAssertResult(SUCCEEDED(ScriptShape( | |
| ddc, &sc, c, 2, 1, &si[0].a, &index, log, &vsa, &glyphs))); | |
| } | |
| return index; | |
| } | |
| void SkScalerContext_Windows::generateAdvance(SkGlyph* glyph) { | |
| this->generateMetrics(glyph); | |
| } | |
| void SkScalerContext_Windows::generateMetrics(SkGlyph* glyph) { | |
| SkASSERT(ddc); | |
| GLYPHMETRICS gm; | |
| memset(&gm, 0, sizeof(gm)); | |
| glyph->fRsbDelta = 0; | |
| glyph->fLsbDelta = 0; | |
| // Note: need to use GGO_GRAY8_BITMAP instead of GGO_METRICS because GGO_METRICS returns a smaller | |
| // BlackBlox; we need the bigger one in case we need the image. fAdvance is the same. | |
| uint32_t ret = GetGlyphOutlineW(ddc, glyph->getGlyphID(0), GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &mat22); | |
| if (GDI_ERROR != ret) { | |
| if (ret == 0) { | |
| // for white space, ret is zero and gmBlackBoxX, gmBlackBoxY are 1 incorrectly! | |
| gm.gmBlackBoxX = gm.gmBlackBoxY = 0; | |
| } | |
| glyph->fWidth = gm.gmBlackBoxX; | |
| glyph->fHeight = gm.gmBlackBoxY; | |
| glyph->fTop = SkToS16(gm.gmptGlyphOrigin.y - gm.gmBlackBoxY); | |
| glyph->fLeft = SkToS16(gm.gmptGlyphOrigin.x); | |
| glyph->fAdvanceX = SkIntToFixed(gm.gmCellIncX); | |
| glyph->fAdvanceY = -SkIntToFixed(gm.gmCellIncY); | |
| } else { | |
| glyph->fWidth = 0; | |
| } | |
| #if 0 | |
| char buf[1024]; | |
| sprintf(buf, "generateMetrics: id:%d, w=%d, h=%d, font:%s, fh:%d\n", glyph->fID, glyph->fWidth, glyph->fHeight, lf.lfFaceName, lf.lfHeight); | |
| OutputDebugString(buf); | |
| #endif | |
| } | |
| void SkScalerContext_Windows::generateFontMetrics(SkPaint::FontMetrics* mx, SkPaint::FontMetrics* my) { | |
| // Note: This code was borrowed from generateLineHeight, which has a note | |
| // stating that it may be incorrect. | |
| if (!(mx || my)) | |
| return; | |
| SkASSERT(ddc); | |
| OUTLINETEXTMETRIC otm; | |
| uint32_t ret = GetOutlineTextMetrics(ddc, sizeof(otm), &otm); | |
| if (sizeof(otm) != ret) { | |
| return; | |
| } | |
| if (mx) { | |
| mx->fTop = -SkIntToScalar(otm.otmTextMetrics.tmAscent); // Actually a long. | |
| mx->fAscent = -SkIntToScalar(otm.otmAscent); | |
| mx->fDescent = -SkIntToScalar(otm.otmDescent); | |
| mx->fBottom = SkIntToScalar(otm.otmTextMetrics.tmDescent); // Long | |
| mx->fLeading = SkIntToScalar(otm.otmTextMetrics.tmInternalLeading | |
| + otm.otmTextMetrics.tmExternalLeading); // Long | |
| } | |
| if (my) { | |
| my->fTop = -SkIntToScalar(otm.otmTextMetrics.tmAscent); // Actually a long. | |
| my->fAscent = -SkIntToScalar(otm.otmAscent); | |
| my->fDescent = -SkIntToScalar(otm.otmDescent); | |
| my->fBottom = SkIntToScalar(otm.otmTextMetrics.tmDescent); // Long | |
| my->fLeading = SkIntToScalar(otm.otmTextMetrics.tmInternalLeading | |
| + otm.otmTextMetrics.tmExternalLeading); // Long | |
| } | |
| } | |
| void SkScalerContext_Windows::generateImage(const SkGlyph& glyph) { | |
| SkAutoMutexAcquire ac(gFTMutex); | |
| SkASSERT(ddc); | |
| GLYPHMETRICS gm; | |
| memset(&gm, 0, sizeof(gm)); | |
| #if 0 | |
| char buf[1024]; | |
| sprintf(buf, "generateImage: id:%d, w=%d, h=%d, font:%s,fh:%d\n", glyph.fID, glyph.fWidth, glyph.fHeight, lf.lfFaceName, lf.lfHeight); | |
| OutputDebugString(buf); | |
| #endif | |
| uint32_t bytecount = 0; | |
| uint32_t total_size = GetGlyphOutlineW(ddc, glyph.fID, GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &mat22); | |
| if (GDI_ERROR != total_size && total_size > 0) { | |
| uint8_t *pBuff = new uint8_t[total_size]; | |
| if (NULL != pBuff) { | |
| total_size = GetGlyphOutlineW(ddc, glyph.fID, GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, total_size, pBuff, &mat22); | |
| SkASSERT(total_size != GDI_ERROR); | |
| SkASSERT(glyph.fWidth == gm.gmBlackBoxX); | |
| SkASSERT(glyph.fHeight == gm.gmBlackBoxY); | |
| uint8_t* dst = (uint8_t*)glyph.fImage; | |
| uint32_t pitch = (gm.gmBlackBoxX + 3) & ~0x3; | |
| if (pitch != glyph.rowBytes()) { | |
| SkASSERT(false); // glyph.fImage has different rowsize!? | |
| } | |
| for (int32_t y = gm.gmBlackBoxY - 1; y >= 0; y--) { | |
| uint8_t* src = pBuff + pitch * y; | |
| for (uint32_t x = 0; x < gm.gmBlackBoxX; x++) { | |
| if (*src > 63) { | |
| *dst = 0xFF; | |
| } | |
| else { | |
| *dst = *src << 2; // scale to 0-255 | |
| } | |
| dst++; | |
| src++; | |
| bytecount++; | |
| } | |
| memset(dst, 0, glyph.rowBytes() - glyph.fWidth); | |
| dst += glyph.rowBytes() - glyph.fWidth; | |
| } | |
| delete[] pBuff; | |
| } | |
| } | |
| SkASSERT(GDI_ERROR != total_size && total_size >= 0); | |
| } | |
| void SkScalerContext_Windows::generatePath(const SkGlyph& glyph, SkPath* path) { | |
| SkAutoMutexAcquire ac(gFTMutex); | |
| SkASSERT(&glyph && path); | |
| SkASSERT(ddc); | |
| path->reset(); | |
| #if 0 | |
| char buf[1024]; | |
| sprintf(buf, "generatePath: id:%d, w=%d, h=%d, font:%s,fh:%d\n", glyph.fID, glyph.fWidth, glyph.fHeight, lf.lfFaceName, lf.lfHeight); | |
| OutputDebugString(buf); | |
| #endif | |
| GLYPHMETRICS gm; | |
| uint32_t total_size = GetGlyphOutlineW(ddc, glyph.fID, GGO_NATIVE | GGO_GLYPH_INDEX, &gm, BUFFERSIZE, glyphbuf, &mat22); | |
| if (GDI_ERROR != total_size) { | |
| const uint8_t* cur_glyph = glyphbuf; | |
| const uint8_t* end_glyph = glyphbuf + total_size; | |
| while(cur_glyph < end_glyph) { | |
| const TTPOLYGONHEADER* th = (TTPOLYGONHEADER*)cur_glyph; | |
| const uint8_t* end_poly = cur_glyph + th->cb; | |
| const uint8_t* cur_poly = cur_glyph + sizeof(TTPOLYGONHEADER); | |
| path->moveTo(SkFixedToScalar(*(SkFixed*)(&th->pfxStart.x)), SkFixedToScalar(*(SkFixed*)(&th->pfxStart.y))); | |
| while(cur_poly < end_poly) { | |
| const TTPOLYCURVE* pc = (const TTPOLYCURVE*)cur_poly; | |
| if (pc->wType == TT_PRIM_LINE) { | |
| for (uint16_t i = 0; i < pc->cpfx; i++) { | |
| path->lineTo(SkFixedToScalar(*(SkFixed*)(&pc->apfx[i].x)), SkFixedToScalar(*(SkFixed*)(&pc->apfx[i].y))); | |
| } | |
| } | |
| if (pc->wType == TT_PRIM_QSPLINE) { | |
| for (uint16_t u = 0; u < pc->cpfx - 1; u++) { // Walk through points in spline | |
| POINTFX pnt_b = pc->apfx[u]; // B is always the current point | |
| POINTFX pnt_c = pc->apfx[u+1]; | |
| if (u < pc->cpfx - 2) { // If not on last spline, compute C | |
| pnt_c.x = SkFixedToFIXED(SkFixedAve(*(SkFixed*)(&pnt_b.x), *(SkFixed*)(&pnt_c.x))); | |
| pnt_c.y = SkFixedToFIXED(SkFixedAve(*(SkFixed*)(&pnt_b.y), *(SkFixed*)(&pnt_c.y))); | |
| } | |
| path->quadTo(SkFixedToScalar(*(SkFixed*)(&pnt_b.x)), SkFixedToScalar(*(SkFixed*)(&pnt_b.y)), SkFixedToScalar(*(SkFixed*)(&pnt_c.x)), SkFixedToScalar(*(SkFixed*)(&pnt_c.y))); | |
| } | |
| } | |
| cur_poly += sizeof(uint16_t) * 2 + sizeof(POINTFX) * pc->cpfx; | |
| } | |
| cur_glyph += th->cb; | |
| path->close(); | |
| } | |
| } | |
| else { | |
| SkASSERT(false); | |
| } | |
| //char buf[1024]; | |
| //sprintf(buf, "generatePath: count:%d\n", count); | |
| //OutputDebugString(buf); | |
| } | |
| // Note: not sure this is the correct implementation | |
| void SkScalerContext_Windows::generateLineHeight(SkPoint* ascent, SkPoint* descent) { | |
| SkASSERT(ddc); | |
| OUTLINETEXTMETRIC otm; | |
| uint32_t ret = GetOutlineTextMetrics(ddc, sizeof(otm), &otm); | |
| if (sizeof(otm) == ret) { | |
| if (ascent) | |
| ascent->iset(0, otm.otmAscent); | |
| if (descent) | |
| descent->iset(0, otm.otmDescent); | |
| } | |
| return; | |
| } | |
| void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) { | |
| SkASSERT(!"SkFontHost::Serialize unimplemented"); | |
| } | |
| SkTypeface* SkFontHost::Deserialize(SkStream* stream) { | |
| SkASSERT(!"SkFontHost::Deserialize unimplemented"); | |
| return NULL; | |
| } | |
| static bool getWidthAdvance(HDC hdc, int gId, int16_t* advance) { | |
| // Initialize the MAT2 structure to the identify transformation matrix. | |
| static const MAT2 mat2 = {SkScalarToFIXED(1), SkScalarToFIXED(0), | |
| SkScalarToFIXED(0), SkScalarToFIXED(1)}; | |
| int flags = GGO_METRICS | GGO_GLYPH_INDEX; | |
| GLYPHMETRICS gm; | |
| if (GDI_ERROR == GetGlyphOutline(hdc, gId, flags, &gm, 0, NULL, &mat2)) { | |
| return false; | |
| } | |
| SkASSERT(advance); | |
| *advance = gm.gmCellIncX; | |
| return true; | |
| } | |
| // static | |
| SkAdvancedTypefaceMetrics* SkFontHost::GetAdvancedTypefaceMetrics( | |
| uint32_t fontID, bool perGlyphInfo) { | |
| SkAutoMutexAcquire ac(gFTMutex); | |
| LogFontTypeface* rec = LogFontTypeface::FindById(fontID); | |
| LOGFONT lf = rec->logFont(); | |
| SkAdvancedTypefaceMetrics* info = NULL; | |
| HDC hdc = CreateCompatibleDC(NULL); | |
| HFONT font = CreateFontIndirect(&lf); | |
| HFONT savefont = (HFONT)SelectObject(hdc, font); | |
| HFONT designFont = NULL; | |
| // To request design units, create a logical font whose height is specified | |
| // as unitsPerEm. | |
| OUTLINETEXTMETRIC otm; | |
| if (!GetOutlineTextMetrics(hdc, sizeof(otm), &otm) || | |
| !GetTextFace(hdc, LF_FACESIZE, lf.lfFaceName)) { | |
| goto Error; | |
| } | |
| lf.lfHeight = -SkToS32(otm.otmEMSquare); | |
| designFont = CreateFontIndirect(&lf); | |
| SelectObject(hdc, designFont); | |
| if (!GetOutlineTextMetrics(hdc, sizeof(otm), &otm)) { | |
| goto Error; | |
| } | |
| info = new SkAdvancedTypefaceMetrics; | |
| #ifdef UNICODE | |
| // Get the buffer size needed first. | |
| size_t str_len = WideCharToMultiByte(CP_UTF8, 0, lf.lfFaceName, -1, NULL, | |
| 0, NULL, NULL); | |
| // Allocate a buffer (str_len already has terminating null accounted for). | |
| char *familyName = new char[str_len]; | |
| // Now actually convert the string. | |
| WideCharToMultiByte(CP_UTF8, 0, lf.lfFaceName, -1, familyName, str_len, | |
| NULL, NULL); | |
| info->fFontName.set(familyName); | |
| delete [] familyName; | |
| #else | |
| info->fFontName.set(lf.lfFaceName); | |
| #endif | |
| if (otm.otmTextMetrics.tmPitchAndFamily & TMPF_TRUETYPE) { | |
| info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; | |
| } else { | |
| info->fType = SkAdvancedTypefaceMetrics::kOther_Font; | |
| } | |
| info->fEmSize = otm.otmEMSquare; | |
| info->fMultiMaster = false; | |
| info->fLastGlyphID = 0; | |
| info->fStyle = 0; | |
| // If this bit is clear the font is a fixed pitch font. | |
| if (!(otm.otmTextMetrics.tmPitchAndFamily & TMPF_FIXED_PITCH)) { | |
| info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; | |
| } | |
| if (otm.otmTextMetrics.tmItalic) { | |
| info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; | |
| } | |
| // Setting symbolic style by default for now. | |
| info->fStyle |= SkAdvancedTypefaceMetrics::kSymbolic_Style; | |
| if (otm.otmTextMetrics.tmPitchAndFamily & FF_ROMAN) { | |
| info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; | |
| } else if (otm.otmTextMetrics.tmPitchAndFamily & FF_SCRIPT) { | |
| info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; | |
| } | |
| // The main italic angle of the font, in tenths of a degree counterclockwise | |
| // from vertical. | |
| info->fItalicAngle = otm.otmItalicAngle / 10; | |
| info->fAscent = SkToS16(otm.otmTextMetrics.tmAscent); | |
| info->fDescent = SkToS16(-otm.otmTextMetrics.tmDescent); | |
| // TODO(ctguil): Use alternate cap height calculation. | |
| // MSDN says otmsCapEmHeight is not support but it is returning a value on | |
| // my Win7 box. | |
| info->fCapHeight = otm.otmsCapEmHeight; | |
| info->fBBox = | |
| SkIRect::MakeLTRB(otm.otmrcFontBox.left, otm.otmrcFontBox.top, | |
| otm.otmrcFontBox.right, otm.otmrcFontBox.bottom); | |
| // Figure out a good guess for StemV - Min width of i, I, !, 1. | |
| // This probably isn't very good with an italic font. | |
| int16_t min_width = SHRT_MAX; | |
| info->fStemV = 0; | |
| char stem_chars[] = {'i', 'I', '!', '1'}; | |
| for (size_t i = 0; i < SK_ARRAY_COUNT(stem_chars); i++) { | |
| ABC abcWidths; | |
| if (GetCharABCWidths(hdc, stem_chars[i], stem_chars[i], &abcWidths)) { | |
| int16_t width = abcWidths.abcB; | |
| if (width > 0 && width < min_width) { | |
| min_width = width; | |
| info->fStemV = min_width; | |
| } | |
| } | |
| } | |
| // If bit 1 is set, the font may not be embedded in a document. | |
| // If bit 1 is clear, the font can be embedded. | |
| // If bit 2 is set, the embedding is read-only. | |
| if (otm.otmfsType & 0x1) { | |
| info->fType = SkAdvancedTypefaceMetrics::kNotEmbeddable_Font; | |
| } else if (perGlyphInfo) { | |
| info->fGlyphWidths.reset( | |
| getAdvanceData(hdc, SHRT_MAX, &getWidthAdvance)); | |
| // Obtain the last glyph index. | |
| SkAdvancedTypefaceMetrics::WidthRange* last = info->fGlyphWidths.get(); | |
| if (last) { | |
| while (last->fNext.get()) { | |
| last = last->fNext.get(); | |
| } | |
| info->fLastGlyphID = last->fEndId; | |
| } | |
| } | |
| Error: | |
| SelectObject(hdc, savefont); | |
| DeleteObject(designFont); | |
| DeleteObject(font); | |
| DeleteDC(hdc); | |
| return info; | |
| } | |
| SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) { | |
| //Should not be used on Windows, keep linker happy | |
| SkASSERT(false); | |
| return CreateTypeface_(get_default_font()); | |
| } | |
| SkStream* SkFontHost::OpenStream(SkFontID uniqueID) { | |
| SkAutoMutexAcquire ac(gFTMutex); | |
| LogFontTypeface* rec = LogFontTypeface::FindById(uniqueID); | |
| HDC hdc = ::CreateCompatibleDC(NULL); | |
| HFONT font = CreateFontIndirect(&rec->logFont()); | |
| HFONT savefont = (HFONT)SelectObject(hdc, font); | |
| size_t bufferSize = GetFontData(hdc, 0, 0, NULL, 0); | |
| SkMemoryStream* stream = new SkMemoryStream(bufferSize); | |
| if (!GetFontData(hdc, 0, 0, (void*)stream->getMemoryBase(), bufferSize)) { | |
| delete stream; | |
| stream = NULL; | |
| } | |
| SelectObject(hdc, savefont); | |
| DeleteObject(font); | |
| DeleteDC(hdc); | |
| return stream; | |
| } | |
| SkScalerContext* SkFontHost::CreateScalerContext(const SkDescriptor* desc) { | |
| return SkNEW_ARGS(SkScalerContext_Windows, (desc)); | |
| } | |
| /** Return the closest matching typeface given either an existing family | |
| (specified by a typeface in that family) or by a familyName, and a | |
| requested style. | |
| 1) If familyFace is null, use famillyName. | |
| 2) If famillyName is null, use familyFace. | |
| 3) If both are null, return the default font that best matches style | |
| This MUST not return NULL. | |
| */ | |
| SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace, | |
| const char familyName[], | |
| const void* data, size_t bytelength, | |
| SkTypeface::Style style) { | |
| static SkTypeface* gDefaultTypeface; | |
| SkAutoMutexAcquire ac(gFTMutex); | |
| #ifndef CAN_USE_LOGFONT_NAME | |
| familyName = NULL; | |
| familyFace = NULL; | |
| #endif | |
| // clip to legal style bits | |
| style = (SkTypeface::Style)(style & SkTypeface::kBoldItalic); | |
| SkTypeface* tf = NULL; | |
| if (NULL == familyFace && NULL == familyName) { | |
| LOGFONT lf = get_default_font(); | |
| lf.lfWeight = (style & SkTypeface::kBold) != 0 ? FW_BOLD : FW_NORMAL ; | |
| lf.lfItalic = ((style & SkTypeface::kItalic) != 0); | |
| // hack until we figure out if SkTypeface should cache this itself | |
| if (style == SkTypeface::kNormal) { | |
| if (NULL == gDefaultTypeface) { | |
| gDefaultTypeface = CreateTypeface_(lf); | |
| } | |
| tf = gDefaultTypeface; | |
| tf->ref(); | |
| } else { | |
| tf = CreateTypeface_(lf); | |
| } | |
| } else { | |
| #ifdef CAN_USE_LOGFONT_NAME | |
| LOGFONT lf; | |
| if (NULL != familyFace) { | |
| uint32_t id = familyFace->uniqueID(); | |
| LogFontTypeface* rec = LogFontTypeface::FindById(id); | |
| if (!rec) { | |
| SkASSERT(false); | |
| lf = get_default_font(); | |
| } | |
| else { | |
| lf = rec->logFont(); | |
| } | |
| } | |
| else { | |
| memset(&lf, 0, sizeof(LOGFONT)); | |
| lf.lfHeight = -11; // default | |
| lf.lfQuality = PROOF_QUALITY; | |
| lf.lfCharSet = DEFAULT_CHARSET; | |
| #ifdef UNICODE | |
| // Get the buffer size needed first. | |
| size_t str_len = ::MultiByteToWideChar(CP_UTF8, 0, familyName, | |
| -1, NULL, 0); | |
| // Allocate a buffer (str_len already has terminating null | |
| // accounted for). | |
| wchar_t *wideFamilyName = new wchar_t[str_len]; | |
| // Now actually convert the string. | |
| ::MultiByteToWideChar(CP_UTF8, 0, familyName, -1, | |
| wideFamilyName, str_len); | |
| ::wcsncpy(lf.lfFaceName, wideFamilyName, LF_FACESIZE); | |
| delete [] wideFamilyName; | |
| #else | |
| ::strncpy(lf.lfFaceName, familyName, LF_FACESIZE); | |
| #endif | |
| lf.lfFaceName[LF_FACESIZE-1] = '\0'; | |
| } | |
| // use the style desired | |
| lf.lfWeight = (style & SkTypeface::kBold) != 0 ? FW_BOLD : FW_NORMAL ; | |
| lf.lfItalic = ((style & SkTypeface::kItalic) != 0); | |
| tf = CreateTypeface_(lf); | |
| #endif | |
| } | |
| if (NULL == tf) { | |
| tf = CreateTypeface_(get_default_font()); | |
| } | |
| return tf; | |
| } | |
| size_t SkFontHost::ShouldPurgeFontCache(size_t sizeAllocatedSoFar) { | |
| if (sizeAllocatedSoFar > FONT_CACHE_MEMORY_BUDGET) | |
| return sizeAllocatedSoFar - FONT_CACHE_MEMORY_BUDGET; | |
| else | |
| return 0; // nothing to do | |
| } | |
| int SkFontHost::ComputeGammaFlag(const SkPaint& paint) { | |
| return 0; | |
| } | |
| void SkFontHost::GetGammaTables(const uint8_t* tables[2]) { | |
| tables[0] = NULL; // black gamma (e.g. exp=1.4) | |
| tables[1] = NULL; // white gamma (e.g. exp= 1/1.4) | |
| } | |
| SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { | |
| printf("SkFontHost::CreateTypefaceFromFile unimplemented"); | |
| return NULL; | |
| } | |
| void SkFontHost::FilterRec(SkScalerContext::Rec* rec) { | |
| // We don't control the hinting nor ClearType settings here | |
| rec->setHinting(SkPaint::kNormal_Hinting); | |
| if (SkMask::FormatIsLCD((SkMask::Format)rec->fMaskFormat)) { | |
| rec->fMaskFormat = SkMask::kA8_Format; | |
| } | |
| } | |
| #endif // WIN32 |