| |
| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkColorFilter.h" |
| #include "SkString.h" |
| #include "SkEndian.h" |
| #include "SkFontHost.h" |
| #include "SkDescriptor.h" |
| #include "SkAdvancedTypefaceMetrics.h" |
| #include "SkStream.h" |
| #include "SkThread.h" |
| #include "SkTypeface_win.h" |
| #include "SkTypefaceCache.h" |
| #include "SkUtils.h" |
| |
| #ifdef WIN32 |
| #include "windows.h" |
| #include "tchar.h" |
| #include "usp10.h" |
| |
| // always packed xxRRGGBB |
| typedef uint32_t SkGdiRGB; |
| |
| template <typename T> T* SkTAddByteOffset(T* ptr, size_t byteOffset) { |
| return (T*)((char*)ptr + byteOffset); |
| } |
| |
| // define this in your Makefile or .gyp to enforce AA requests |
| // which GDI ignores at small sizes. This flag guarantees AA |
| // for rotated text, regardless of GDI's notions. |
| //#define SK_ENFORCE_ROTATED_TEXT_AA_ON_WINDOWS |
| |
| // client3d has to undefine this for now |
| #define CAN_USE_LOGFONT_NAME |
| |
| static bool isLCD(const SkScalerContext::Rec& rec) { |
| return SkMask::kLCD16_Format == rec.fMaskFormat || |
| SkMask::kLCD32_Format == rec.fMaskFormat; |
| } |
| |
| static bool bothZero(SkScalar a, SkScalar b) { |
| return 0 == a && 0 == b; |
| } |
| |
| // returns false if there is any non-90-rotation or skew |
| static bool isAxisAligned(const SkScalerContext::Rec& rec) { |
| return 0 == rec.fPreSkewX && |
| (bothZero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || |
| bothZero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); |
| } |
| |
| static bool needToRenderWithSkia(const SkScalerContext::Rec& rec) { |
| #ifdef SK_ENFORCE_ROTATED_TEXT_AA_ON_WINDOWS |
| // What we really want to catch is when GDI will ignore the AA request and give |
| // us BW instead. Smallish rotated text is one heuristic, so this code is just |
| // an approximation. We shouldn't need to do this for larger sizes, but at those |
| // sizes, the quality difference gets less and less between our general |
| // scanconverter and GDI's. |
| if (SkMask::kA8_Format == rec.fMaskFormat && !isAxisAligned(rec)) { |
| return true; |
| } |
| #endif |
| // false means allow GDI to generate the bits |
| return false; |
| } |
| |
| using namespace skia_advanced_typeface_metrics_utils; |
| |
| static const uint16_t BUFFERSIZE = (16384 - 32); |
| static uint8_t glyphbuf[BUFFERSIZE]; |
| |
| /** |
| * Since LOGFONT wants its textsize as an int, and we support fractional sizes, |
| * and since we have a cache of LOGFONTs for our tyepfaces, we always set the |
| * lfHeight to a canonical size, and then we use the 2x2 matrix to achieve the |
| * actual requested size. |
| */ |
| static const int gCanonicalTextSize = 64; |
| |
| static void make_canonical(LOGFONT* lf) { |
| lf->lfHeight = -gCanonicalTextSize; |
| lf->lfQuality = CLEARTYPE_QUALITY;//PROOF_QUALITY; |
| lf->lfCharSet = DEFAULT_CHARSET; |
| // lf->lfClipPrecision = 64; |
| } |
| |
| static SkTypeface::Style get_style(const LOGFONT& lf) { |
| unsigned style = 0; |
| if (lf.lfWeight >= FW_BOLD) { |
| style |= SkTypeface::kBold; |
| } |
| if (lf.lfItalic) { |
| style |= SkTypeface::kItalic; |
| } |
| return static_cast<SkTypeface::Style>(style); |
| } |
| |
| static void setStyle(LOGFONT* lf, SkTypeface::Style style) { |
| lf->lfWeight = (style & SkTypeface::kBold) != 0 ? FW_BOLD : FW_NORMAL ; |
| lf->lfItalic = ((style & SkTypeface::kItalic) != 0); |
| } |
| |
| static inline FIXED SkFixedToFIXED(SkFixed x) { |
| return *(FIXED*)(&x); |
| } |
| |
| static inline FIXED SkScalarToFIXED(SkScalar x) { |
| return SkFixedToFIXED(SkScalarToFixed(x)); |
| } |
| |
| static unsigned calculateGlyphCount(HDC hdc) { |
| // The 'maxp' table stores the number of glyphs at offset 4, in 2 bytes. |
| const DWORD maxpTag = |
| SkEndian_SwapBE32(SkSetFourByteTag('m', 'a', 'x', 'p')); |
| uint16_t glyphs; |
| if (GetFontData(hdc, maxpTag, 4, &glyphs, sizeof(glyphs)) != GDI_ERROR) { |
| return SkEndian_SwapBE16(glyphs); |
| } |
| |
| // Binary search for glyph count. |
| static const MAT2 mat2 = {{0, 1}, {0, 0}, {0, 0}, {0, 1}}; |
| int32_t max = SK_MaxU16 + 1; |
| int32_t min = 0; |
| GLYPHMETRICS gm; |
| while (min < max) { |
| int32_t mid = min + ((max - min) / 2); |
| if (GetGlyphOutlineW(hdc, mid, GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, |
| NULL, &mat2) == GDI_ERROR) { |
| max = mid; |
| } else { |
| min = mid + 1; |
| } |
| } |
| SkASSERT(min == max); |
| return min; |
| } |
| |
| class LogFontTypeface : public SkTypeface { |
| public: |
| LogFontTypeface(SkTypeface::Style style, SkFontID fontID, const LOGFONT& lf) : |
| SkTypeface(style, fontID, false), fLogFont(lf) {} |
| |
| LOGFONT fLogFont; |
| |
| static LogFontTypeface* Create(const LOGFONT& lf) { |
| SkTypeface::Style style = get_style(lf); |
| SkFontID fontID = SkTypefaceCache::NewFontID(); |
| return new LogFontTypeface(style, fontID, lf); |
| } |
| }; |
| |
| static const LOGFONT& get_default_font() { |
| static LOGFONT gDefaultFont; |
| return gDefaultFont; |
| } |
| |
| static bool FindByLogFont(SkTypeface* face, SkTypeface::Style requestedStyle, void* ctx) { |
| LogFontTypeface* lface = reinterpret_cast<LogFontTypeface*>(face); |
| const LOGFONT* lf = reinterpret_cast<const LOGFONT*>(ctx); |
| |
| return get_style(lface->fLogFont) == requestedStyle && |
| !memcmp(&lface->fLogFont, lf, sizeof(LOGFONT)); |
| } |
| |
| /** |
| * This guy is public. It first searches the cache, and if a match is not found, |
| * it creates a new face. |
| */ |
| SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT& origLF) { |
| LOGFONT lf = origLF; |
| make_canonical(&lf); |
| SkTypeface* face = SkTypefaceCache::FindByProcAndRef(FindByLogFont, &lf); |
| if (NULL == face) { |
| face = LogFontTypeface::Create(lf); |
| SkTypefaceCache::Add(face, get_style(lf)); |
| } |
| return face; |
| } |
| |
| /** |
| * This guy is public |
| */ |
| void SkLOGFONTFromTypeface(const SkTypeface* face, LOGFONT* lf) { |
| if (NULL == face) { |
| *lf = get_default_font(); |
| } else { |
| *lf = ((const LogFontTypeface*)face)->fLogFont; |
| } |
| } |
| |
| SkFontID SkFontHost::NextLogicalFont(SkFontID currFontID, SkFontID origFontID) { |
| // 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; |
| } |
| |
| static void ensure_typeface_accessible(SkFontID fontID) { |
| LogFontTypeface* face = (LogFontTypeface*)SkTypefaceCache::FindByID(fontID); |
| if (face) { |
| SkFontHost::EnsureTypefaceAccessible(*face); |
| } |
| } |
| |
| static void GetLogFontByID(SkFontID fontID, LOGFONT* lf) { |
| LogFontTypeface* face = (LogFontTypeface*)SkTypefaceCache::FindByID(fontID); |
| if (face) { |
| *lf = face->fLogFont; |
| } else { |
| sk_bzero(lf, sizeof(LOGFONT)); |
| } |
| } |
| |
| // Construct Glyph to Unicode table. |
| // Unicode code points that require conjugate pairs in utf16 are not |
| // supported. |
| // TODO(arthurhsu): Add support for conjugate pairs. It looks like that may |
| // require parsing the TTF cmap table (platform 4, encoding 12) directly instead |
| // of calling GetFontUnicodeRange(). |
| static void populate_glyph_to_unicode(HDC fontHdc, const unsigned glyphCount, |
| SkTDArray<SkUnichar>* glyphToUnicode) { |
| DWORD glyphSetBufferSize = GetFontUnicodeRanges(fontHdc, NULL); |
| if (!glyphSetBufferSize) { |
| return; |
| } |
| |
| SkAutoTDeleteArray<BYTE> glyphSetBuffer(new BYTE[glyphSetBufferSize]); |
| GLYPHSET* glyphSet = |
| reinterpret_cast<LPGLYPHSET>(glyphSetBuffer.get()); |
| if (GetFontUnicodeRanges(fontHdc, glyphSet) != glyphSetBufferSize) { |
| return; |
| } |
| |
| glyphToUnicode->setCount(glyphCount); |
| memset(glyphToUnicode->begin(), 0, glyphCount * sizeof(SkUnichar)); |
| for (DWORD i = 0; i < glyphSet->cRanges; ++i) { |
| // There is no guarantee that within a Unicode range, the corresponding |
| // glyph id in a font file are continuous. So, even if we have ranges, |
| // we can't just use the first and last entry of the range to compute |
| // result. We need to enumerate them one by one. |
| int count = glyphSet->ranges[i].cGlyphs; |
| SkAutoTArray<WCHAR> chars(count + 1); |
| chars[count] = 0; // termintate string |
| SkAutoTArray<WORD> glyph(count); |
| for (USHORT j = 0; j < count; ++j) { |
| chars[j] = glyphSet->ranges[i].wcLow + j; |
| } |
| GetGlyphIndicesW(fontHdc, chars.get(), count, glyph.get(), |
| GGI_MARK_NONEXISTING_GLYPHS); |
| // If the glyph ID is valid, and the glyph is not mapped, then we will |
| // fill in the char id into the vector. If the glyph is mapped already, |
| // skip it. |
| // TODO(arthurhsu): better improve this. e.g. Get all used char ids from |
| // font cache, then generate this mapping table from there. It's |
| // unlikely to have collisions since glyph reuse happens mostly for |
| // different Unicode pages. |
| for (USHORT j = 0; j < count; ++j) { |
| if (glyph[j] != 0xffff && glyph[j] < glyphCount && |
| (*glyphToUnicode)[glyph[j]] == 0) { |
| (*glyphToUnicode)[glyph[j]] = chars[j]; |
| } |
| } |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////// |
| |
| static int alignTo32(int n) { |
| return (n + 31) & ~31; |
| } |
| |
| struct MyBitmapInfo : public BITMAPINFO { |
| RGBQUAD fMoreSpaceForColors[1]; |
| }; |
| |
| class HDCOffscreen { |
| public: |
| HDCOffscreen() { |
| fFont = 0; |
| fDC = 0; |
| fBM = 0; |
| fBits = NULL; |
| fWidth = fHeight = 0; |
| fIsBW = false; |
| fColor = kInvalid_Color; |
| } |
| |
| ~HDCOffscreen() { |
| if (fDC) { |
| DeleteDC(fDC); |
| } |
| if (fBM) { |
| DeleteObject(fBM); |
| } |
| } |
| |
| void init(HFONT font, const XFORM& xform) { |
| fFont = font; |
| fXform = xform; |
| } |
| |
| const void* draw(const SkGlyph&, bool isBW, SkGdiRGB fgColor, |
| size_t* srcRBPtr); |
| |
| private: |
| HDC fDC; |
| HBITMAP fBM; |
| HFONT fFont; |
| XFORM fXform; |
| void* fBits; // points into fBM |
| COLORREF fColor; |
| int fWidth; |
| int fHeight; |
| bool fIsBW; |
| |
| enum { |
| // will always trigger us to reset the color, since we |
| // should only store 0 or 0x00FFFFFF or gray (0x007F7F7F) |
| kInvalid_Color = 12345 |
| }; |
| }; |
| |
| const void* HDCOffscreen::draw(const SkGlyph& glyph, bool isBW, |
| SkGdiRGB fgColor, size_t* srcRBPtr) { |
| if (0 == fDC) { |
| fDC = CreateCompatibleDC(0); |
| if (0 == fDC) { |
| return NULL; |
| } |
| SetGraphicsMode(fDC, GM_ADVANCED); |
| SetBkMode(fDC, TRANSPARENT); |
| SetTextAlign(fDC, TA_LEFT | TA_BASELINE); |
| SelectObject(fDC, fFont); |
| fColor = kInvalid_Color; |
| } |
| |
| if (fBM && (fIsBW != isBW || fWidth < glyph.fWidth || fHeight < glyph.fHeight)) { |
| DeleteObject(fBM); |
| fBM = 0; |
| } |
| fIsBW = isBW; |
| |
| COLORREF color = fgColor; |
| if (fIsBW) { |
| color = 0xFFFFFF; |
| } |
| if (fColor != color) { |
| fColor = color; |
| COLORREF prev = SetTextColor(fDC, color); |
| SkASSERT(prev != CLR_INVALID); |
| } |
| |
| fWidth = SkMax32(fWidth, glyph.fWidth); |
| fHeight = SkMax32(fHeight, glyph.fHeight); |
| |
| int biWidth = isBW ? alignTo32(fWidth) : fWidth; |
| |
| if (0 == fBM) { |
| MyBitmapInfo info; |
| sk_bzero(&info, sizeof(info)); |
| if (isBW) { |
| RGBQUAD blackQuad = { 0, 0, 0, 0 }; |
| RGBQUAD whiteQuad = { 0xFF, 0xFF, 0xFF, 0 }; |
| info.bmiColors[0] = blackQuad; |
| info.bmiColors[1] = whiteQuad; |
| } |
| info.bmiHeader.biSize = sizeof(info.bmiHeader); |
| info.bmiHeader.biWidth = biWidth; |
| info.bmiHeader.biHeight = fHeight; |
| info.bmiHeader.biPlanes = 1; |
| info.bmiHeader.biBitCount = isBW ? 1 : 32; |
| info.bmiHeader.biCompression = BI_RGB; |
| if (isBW) { |
| info.bmiHeader.biClrUsed = 2; |
| } |
| fBM = CreateDIBSection(fDC, &info, DIB_RGB_COLORS, &fBits, 0, 0); |
| if (0 == fBM) { |
| return NULL; |
| } |
| SelectObject(fDC, fBM); |
| } |
| |
| // erase |
| size_t srcRB = isBW ? (biWidth >> 3) : (fWidth << 2); |
| size_t size = fHeight * srcRB; |
| unsigned bg = (0 == color) ? 0xFF : 0; |
| memset(fBits, bg, size); |
| |
| XFORM xform = fXform; |
| xform.eDx = (float)-glyph.fLeft; |
| xform.eDy = (float)-glyph.fTop; |
| SetWorldTransform(fDC, &xform); |
| |
| uint16_t glyphID = glyph.getGlyphID(); |
| BOOL ret = ExtTextOutW(fDC, 0, 0, ETO_GLYPH_INDEX, NULL, reinterpret_cast<LPCWSTR>(&glyphID), 1, NULL); |
| GdiFlush(); |
| if (0 == ret) { |
| return NULL; |
| } |
| *srcRBPtr = srcRB; |
| // offset to the start of the image |
| return (const char*)fBits + (fHeight - glyph.fHeight) * srcRB; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////// |
| |
| class SkScalerContext_Windows : public SkScalerContext { |
| public: |
| SkScalerContext_Windows(const SkDescriptor* desc); |
| virtual ~SkScalerContext_Windows(); |
| |
| protected: |
| virtual unsigned generateGlyphCount(); |
| 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 generateFontMetrics(SkPaint::FontMetrics* mX, SkPaint::FontMetrics* mY); |
| |
| private: |
| HDCOffscreen fOffscreen; |
| SkScalar fScale; // to get from canonical size to real size |
| MAT2 fMat22; |
| XFORM fXform; |
| HDC fDDC; |
| HFONT fSavefont; |
| HFONT fFont; |
| SCRIPT_CACHE fSC; |
| int fGlyphCount; |
| |
| HFONT fHiResFont; |
| MAT2 fMat22Identity; |
| SkMatrix fHiResMatrix; |
| }; |
| |
| static float mul2float(SkScalar a, SkScalar b) { |
| return SkScalarToFloat(SkScalarMul(a, b)); |
| } |
| |
| static FIXED float2FIXED(float x) { |
| return SkFixedToFIXED(SkFloatToFixed(x)); |
| } |
| |
| SK_DECLARE_STATIC_MUTEX(gFTMutex); |
| |
| #define HIRES_TEXTSIZE 2048 |
| #define HIRES_SHIFT 11 |
| static inline SkFixed HiResToFixed(int value) { |
| return value << (16 - HIRES_SHIFT); |
| } |
| |
| static bool needHiResMetrics(const SkScalar mat[2][2]) { |
| return mat[1][0] || mat[0][1]; |
| } |
| |
| static BYTE compute_quality(const SkScalerContext::Rec& rec) { |
| switch (rec.fMaskFormat) { |
| case SkMask::kBW_Format: |
| return NONANTIALIASED_QUALITY; |
| case SkMask::kLCD16_Format: |
| case SkMask::kLCD32_Format: |
| return CLEARTYPE_QUALITY; |
| default: |
| if (rec.fFlags & SkScalerContext::kGenA8FromLCD_Flag) { |
| return CLEARTYPE_QUALITY; |
| } else { |
| return ANTIALIASED_QUALITY; |
| } |
| } |
| } |
| |
| SkScalerContext_Windows::SkScalerContext_Windows(const SkDescriptor* desc) |
| : SkScalerContext(desc), fDDC(0), fFont(0), fSavefont(0), fSC(0) |
| , fGlyphCount(-1) { |
| SkAutoMutexAcquire ac(gFTMutex); |
| |
| fScale = fRec.fTextSize / gCanonicalTextSize; |
| |
| fXform.eM11 = mul2float(fScale, fRec.fPost2x2[0][0]); |
| fXform.eM12 = mul2float(fScale, fRec.fPost2x2[1][0]); |
| fXform.eM21 = mul2float(fScale, fRec.fPost2x2[0][1]); |
| fXform.eM22 = mul2float(fScale, fRec.fPost2x2[1][1]); |
| fXform.eDx = 0; |
| fXform.eDy = 0; |
| |
| fMat22.eM11 = float2FIXED(fXform.eM11); |
| fMat22.eM12 = float2FIXED(fXform.eM12); |
| fMat22.eM21 = float2FIXED(-fXform.eM21); |
| fMat22.eM22 = float2FIXED(-fXform.eM22); |
| |
| fDDC = ::CreateCompatibleDC(NULL); |
| SetGraphicsMode(fDDC, GM_ADVANCED); |
| SetBkMode(fDDC, TRANSPARENT); |
| |
| // Scaling by the DPI is inconsistent with how Skia draws elsewhere |
| //SkScalar height = -(fRec.fTextSize * GetDeviceCaps(ddc, LOGPIXELSY) / 72); |
| LOGFONT lf; |
| GetLogFontByID(fRec.fFontID, &lf); |
| lf.lfHeight = -gCanonicalTextSize; |
| lf.lfQuality = compute_quality(fRec); |
| fFont = CreateFontIndirect(&lf); |
| |
| // if we're rotated, or want fractional widths, create a hires font |
| fHiResFont = 0; |
| if (needHiResMetrics(fRec.fPost2x2)) { |
| lf.lfHeight = -HIRES_TEXTSIZE; |
| fHiResFont = CreateFontIndirect(&lf); |
| |
| fMat22Identity.eM11 = fMat22Identity.eM22 = SkFixedToFIXED(SK_Fixed1); |
| fMat22Identity.eM12 = fMat22Identity.eM21 = SkFixedToFIXED(0); |
| |
| // construct a matrix to go from HIRES logical units to our device units |
| fRec.getSingleMatrix(&fHiResMatrix); |
| SkScalar scale = SkScalarInvert(SkIntToScalar(HIRES_TEXTSIZE)); |
| fHiResMatrix.preScale(scale, scale); |
| } |
| fSavefont = (HFONT)SelectObject(fDDC, fFont); |
| |
| if (needToRenderWithSkia(fRec)) { |
| this->forceGenerateImageFromPath(); |
| } |
| |
| fOffscreen.init(fFont, fXform); |
| } |
| |
| SkScalerContext_Windows::~SkScalerContext_Windows() { |
| if (fDDC) { |
| ::SelectObject(fDDC, fSavefont); |
| ::DeleteDC(fDDC); |
| } |
| if (fFont) { |
| ::DeleteObject(fFont); |
| } |
| if (fHiResFont) { |
| ::DeleteObject(fHiResFont); |
| } |
| if (fSC) { |
| ::ScriptFreeCache(&fSC); |
| } |
| } |
| |
| unsigned SkScalerContext_Windows::generateGlyphCount() { |
| if (fGlyphCount < 0) { |
| fGlyphCount = calculateGlyphCount(fDDC); |
| } |
| return fGlyphCount; |
| } |
| |
| 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(fDDC, 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( |
| fDDC, &fSC, 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(fDDC); |
| |
| GLYPHMETRICS gm; |
| sk_bzero(&gm, 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(fDDC, glyph->getGlyphID(0), GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22); |
| if (GDI_ERROR == ret) { |
| ensure_typeface_accessible(fRec.fFontID); |
| ret = GetGlyphOutlineW(fDDC, glyph->getGlyphID(0), GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22); |
| } |
| |
| 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); |
| |
| // we outset in all dimensions, since the image may bleed outside |
| // of the computed bounds returned by GetGlyphOutline. |
| // This was deduced by trial and error for small text (e.g. 8pt), so there |
| // maybe a more precise way to make this adjustment... |
| // |
| // This test shows us clipping the tops of some of the CJK fonts unless we |
| // increase the top of the box by 2, hence the height by 4. This seems to |
| // correspond to an embedded bitmap font, but not sure. |
| // LayoutTests/fast/text/backslash-to-yen-sign-euc.html |
| // |
| if (glyph->fWidth) { // don't outset an empty glyph |
| glyph->fWidth += 4; |
| glyph->fHeight += 4; |
| glyph->fTop -= 2; |
| glyph->fLeft -= 2; |
| } |
| |
| if (fHiResFont) { |
| SelectObject(fDDC, fHiResFont); |
| sk_bzero(&gm, sizeof(gm)); |
| ret = GetGlyphOutlineW(fDDC, glyph->getGlyphID(0), GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22Identity); |
| if (GDI_ERROR != ret) { |
| SkPoint advance; |
| fHiResMatrix.mapXY(SkIntToScalar(gm.gmCellIncX), SkIntToScalar(gm.gmCellIncY), &advance); |
| glyph->fAdvanceX = SkScalarToFixed(advance.fX); |
| glyph->fAdvanceY = SkScalarToFixed(advance.fY); |
| } |
| SelectObject(fDDC, fFont); |
| } |
| } else { |
| glyph->fWidth = 0; |
| } |
| } |
| |
| 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(fDDC); |
| |
| OUTLINETEXTMETRIC otm; |
| |
| uint32_t ret = GetOutlineTextMetrics(fDDC, sizeof(otm), &otm); |
| if (GDI_ERROR == ret) { |
| ensure_typeface_accessible(fRec.fFontID); |
| ret = GetOutlineTextMetrics(fDDC, sizeof(otm), &otm); |
| } |
| if (sizeof(otm) != ret) { |
| return; |
| } |
| |
| if (mx) { |
| mx->fTop = -fScale * otm.otmTextMetrics.tmAscent; |
| mx->fAscent = -fScale * otm.otmAscent; |
| mx->fDescent = -fScale * otm.otmDescent; |
| mx->fBottom = fScale * otm.otmTextMetrics.tmDescent; |
| mx->fLeading = fScale * (otm.otmTextMetrics.tmInternalLeading |
| + otm.otmTextMetrics.tmExternalLeading); |
| } |
| |
| if (my) { |
| my->fTop = -fScale * otm.otmTextMetrics.tmAscent; |
| my->fAscent = -fScale * otm.otmAscent; |
| my->fDescent = -fScale * otm.otmDescent; |
| my->fBottom = fScale * otm.otmTextMetrics.tmDescent; |
| my->fLeading = fScale * (otm.otmTextMetrics.tmInternalLeading |
| + otm.otmTextMetrics.tmExternalLeading); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////////////// |
| |
| static void build_power_table(uint8_t table[], float ee) { |
| for (int i = 0; i < 256; i++) { |
| float x = i / 255.f; |
| x = powf(x, ee); |
| int xx = SkScalarRound(SkFloatToScalar(x * 255)); |
| table[i] = SkToU8(xx); |
| } |
| } |
| |
| // This will invert the gamma applied by GDI, so we can sort-of get linear values. |
| // Needed when we draw non-black, non-white text, and don't know how to bias it. |
| static const uint8_t* getInverseGammaTable() { |
| static bool gInited; |
| static uint8_t gTable[256]; |
| if (!gInited) { |
| UINT level = 0; |
| if (!SystemParametersInfo(SPI_GETFONTSMOOTHINGCONTRAST, 0, &level, 0) || !level) { |
| // can't get the data, so use a default |
| level = 1400; |
| } |
| build_power_table(gTable, level / 1000.0f); |
| gInited = true; |
| } |
| return gTable; |
| } |
| |
| #include "SkColorPriv.h" |
| |
| // gdi's bitmap is upside-down, so we reverse dst walking in Y |
| // whenever we copy it into skia's buffer |
| |
| static int compute_luminance(int r, int g, int b) { |
| // return (r * 2 + g * 5 + b) >> 3; |
| return (r * 27 + g * 92 + b * 9) >> 7; |
| } |
| |
| static inline uint8_t rgb_to_a8(SkGdiRGB rgb) { |
| int r = (rgb >> 16) & 0xFF; |
| int g = (rgb >> 8) & 0xFF; |
| int b = (rgb >> 0) & 0xFF; |
| return compute_luminance(r, g, b); |
| } |
| |
| static inline uint16_t rgb_to_lcd16(SkGdiRGB rgb) { |
| int r = (rgb >> 16) & 0xFF; |
| int g = (rgb >> 8) & 0xFF; |
| int b = (rgb >> 0) & 0xFF; |
| return SkPackRGB16(SkR32ToR16(r), SkG32ToG16(g), SkB32ToB16(b)); |
| } |
| |
| static inline SkPMColor rgb_to_lcd32(SkGdiRGB rgb) { |
| int r = (rgb >> 16) & 0xFF; |
| int g = (rgb >> 8) & 0xFF; |
| int b = (rgb >> 0) & 0xFF; |
| int a = SkMax32(r, SkMax32(g, b)); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // Is this GDI color neither black nor white? If so, we have to keep this |
| // image as is, rather than smashing it down to a BW mask. |
| // |
| // returns int instead of bool, since we don't want/have to pay to convert |
| // the zero/non-zero value into a bool |
| static int is_not_black_or_white(SkGdiRGB c) { |
| // same as (but faster than) |
| // c &= 0x00FFFFFF; |
| // return 0 == c || 0x00FFFFFF == c; |
| return (c + (c & 1)) & 0x00FFFFFF; |
| } |
| |
| static bool is_rgb_really_bw(const SkGdiRGB* src, int width, int height, int srcRB) { |
| for (int y = 0; y < height; ++y) { |
| for (int x = 0; x < width; ++x) { |
| if (is_not_black_or_white(src[x])) { |
| return false; |
| } |
| } |
| src = SkTAddByteOffset(src, srcRB); |
| } |
| return true; |
| } |
| |
| static void rgb_to_bw(const SkGdiRGB* SK_RESTRICT src, size_t srcRB, |
| const SkGlyph& glyph, int32_t xorMask) { |
| const int width = glyph.fWidth; |
| const size_t dstRB = (width + 7) >> 3; |
| uint8_t* SK_RESTRICT dst = (uint8_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB); |
| |
| int byteCount = width >> 3; |
| int bitCount = width & 7; |
| |
| // adjust srcRB to skip the values in our byteCount loop, |
| // since we increment src locally there |
| srcRB -= byteCount * 8 * sizeof(SkGdiRGB); |
| |
| for (int y = 0; y < glyph.fHeight; ++y) { |
| if (byteCount > 0) { |
| for (int i = 0; i < byteCount; ++i) { |
| unsigned byte = 0; |
| byte |= (src[0] ^ xorMask) & (1 << 7); |
| byte |= (src[1] ^ xorMask) & (1 << 6); |
| byte |= (src[2] ^ xorMask) & (1 << 5); |
| byte |= (src[3] ^ xorMask) & (1 << 4); |
| byte |= (src[4] ^ xorMask) & (1 << 3); |
| byte |= (src[5] ^ xorMask) & (1 << 2); |
| byte |= (src[6] ^ xorMask) & (1 << 1); |
| byte |= (src[7] ^ xorMask) & (1 << 0); |
| dst[i] = byte; |
| src += 8; |
| } |
| } |
| if (bitCount > 0) { |
| unsigned byte = 0; |
| unsigned mask = 0x80; |
| for (int i = 0; i < bitCount; i++) { |
| byte |= (src[i] ^ xorMask) & mask; |
| mask >>= 1; |
| } |
| dst[byteCount] = byte; |
| } |
| src = SkTAddByteOffset(src, srcRB); |
| dst -= dstRB; |
| } |
| } |
| |
| static void rgb_to_a8(const SkGdiRGB* SK_RESTRICT src, size_t srcRB, |
| const SkGlyph& glyph, int32_t xorMask) { |
| const size_t dstRB = glyph.rowBytes(); |
| const int width = glyph.fWidth; |
| uint8_t* SK_RESTRICT dst = (uint8_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB); |
| |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int i = 0; i < width; i++) { |
| dst[i] = rgb_to_a8(src[i] ^ xorMask); |
| } |
| src = SkTAddByteOffset(src, srcRB); |
| dst -= dstRB; |
| } |
| } |
| |
| static void rgb_to_lcd16(const SkGdiRGB* SK_RESTRICT src, size_t srcRB, |
| const SkGlyph& glyph, int32_t xorMask) { |
| const size_t dstRB = glyph.rowBytes(); |
| const int width = glyph.fWidth; |
| uint16_t* SK_RESTRICT dst = (uint16_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB); |
| |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int i = 0; i < width; i++) { |
| dst[i] = rgb_to_lcd16(src[i] ^ xorMask); |
| } |
| src = SkTAddByteOffset(src, srcRB); |
| dst = (uint16_t*)((char*)dst - dstRB); |
| } |
| } |
| |
| static void rgb_to_lcd32(const SkGdiRGB* SK_RESTRICT src, size_t srcRB, |
| const SkGlyph& glyph, int32_t xorMask) { |
| const size_t dstRB = glyph.rowBytes(); |
| const int width = glyph.fWidth; |
| SkPMColor* SK_RESTRICT dst = (SkPMColor*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB); |
| |
| for (int y = 0; y < glyph.fHeight; y++) { |
| for (int i = 0; i < width; i++) { |
| dst[i] = rgb_to_lcd32(src[i] ^ xorMask); |
| } |
| src = SkTAddByteOffset(src, srcRB); |
| dst = (SkPMColor*)((char*)dst - dstRB); |
| } |
| } |
| |
| static inline unsigned clamp255(unsigned x) { |
| SkASSERT(x <= 256); |
| return x - (x >> 8); |
| } |
| |
| #define WHITE_LUMINANCE_LIMIT 0xA0 |
| #define BLACK_LUMINANCE_LIMIT 0x40 |
| |
| void SkScalerContext_Windows::generateImage(const SkGlyph& glyph) { |
| SkAutoMutexAcquire ac(gFTMutex); |
| |
| SkASSERT(fDDC); |
| |
| const bool isBW = SkMask::kBW_Format == fRec.fMaskFormat; |
| const bool isAA = !isLCD(fRec); |
| bool isWhite = fRec.getLuminanceByte() >= WHITE_LUMINANCE_LIMIT; |
| bool isBlack = fRec.getLuminanceByte() <= BLACK_LUMINANCE_LIMIT; |
| |
| SkGdiRGB fgColor; |
| uint32_t rgbXOR; |
| const uint8_t* table = NULL; |
| if (isBW || isWhite) { |
| fgColor = 0x00FFFFFF; |
| rgbXOR = 0; |
| } else if (isBlack) { |
| fgColor = 0; |
| rgbXOR = ~0; |
| } else { |
| table = getInverseGammaTable(); |
| fgColor = 0x00FFFFFF; |
| rgbXOR = 0; |
| } |
| |
| size_t srcRB; |
| const void* bits = fOffscreen.draw(glyph, isBW, fgColor, &srcRB); |
| if (NULL == bits) { |
| ensure_typeface_accessible(fRec.fFontID); |
| bits = fOffscreen.draw(glyph, isBW, fgColor, &srcRB); |
| if (NULL == bits) { |
| sk_bzero(glyph.fImage, glyph.computeImageSize()); |
| return; |
| } |
| } |
| |
| if (table) { |
| SkGdiRGB* addr = (SkGdiRGB*)bits; |
| for (int y = 0; y < glyph.fHeight; ++y) { |
| for (int x = 0; x < glyph.fWidth; ++x) { |
| int r = (addr[x] >> 16) & 0xFF; |
| int g = (addr[x] >> 8) & 0xFF; |
| int b = (addr[x] >> 0) & 0xFF; |
| addr[x] = (table[r] << 16) | (table[g] << 8) | table[b]; |
| } |
| addr = SkTAddByteOffset(addr, srcRB); |
| } |
| } |
| |
| int width = glyph.fWidth; |
| size_t dstRB = glyph.rowBytes(); |
| if (isBW) { |
| const uint8_t* src = (const uint8_t*)bits; |
| uint8_t* dst = (uint8_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB); |
| for (int y = 0; y < glyph.fHeight; y++) { |
| memcpy(dst, src, dstRB); |
| src += srcRB; |
| dst -= dstRB; |
| } |
| } else if (isAA) { |
| // since the caller may require A8 for maskfilters, we can't check for BW |
| // ... until we have the caller tell us that explicitly |
| const SkGdiRGB* src = (const SkGdiRGB*)bits; |
| rgb_to_a8(src, srcRB, glyph, rgbXOR); |
| } else { // LCD16 |
| const SkGdiRGB* src = (const SkGdiRGB*)bits; |
| if (is_rgb_really_bw(src, width, glyph.fHeight, srcRB)) { |
| rgb_to_bw(src, srcRB, glyph, rgbXOR); |
| ((SkGlyph*)&glyph)->fMaskFormat = SkMask::kBW_Format; |
| } else { |
| if (SkMask::kLCD16_Format == glyph.fMaskFormat) { |
| rgb_to_lcd16(src, srcRB, glyph, rgbXOR); |
| } else { |
| SkASSERT(SkMask::kLCD32_Format == glyph.fMaskFormat); |
| rgb_to_lcd32(src, srcRB, glyph, rgbXOR); |
| } |
| } |
| } |
| } |
| |
| void SkScalerContext_Windows::generatePath(const SkGlyph& glyph, SkPath* path) { |
| |
| SkAutoMutexAcquire ac(gFTMutex); |
| |
| SkASSERT(&glyph && path); |
| SkASSERT(fDDC); |
| |
| 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(fDDC, glyph.fID, GGO_NATIVE | GGO_GLYPH_INDEX, &gm, BUFFERSIZE, glyphbuf, &fMat22); |
| if (GDI_ERROR == total_size) { |
| ensure_typeface_accessible(fRec.fFontID); |
| total_size = GetGlyphOutlineW(fDDC, glyph.fID, GGO_NATIVE | GGO_GLYPH_INDEX, &gm, BUFFERSIZE, glyphbuf, &fMat22); |
| } |
| |
| 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); |
| } |
| |
| void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) { |
| SkDEBUGFAIL("SkFontHost::Serialize unimplemented"); |
| } |
| |
| SkTypeface* SkFontHost::Deserialize(SkStream* stream) { |
| SkDEBUGFAIL("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, |
| SkAdvancedTypefaceMetrics::PerGlyphInfo perGlyphInfo, |
| const uint32_t* glyphIDs, |
| uint32_t glyphIDsCount) { |
| LOGFONT lf; |
| GetLogFontByID(fontID, &lf); |
| SkAdvancedTypefaceMetrics* info = NULL; |
| |
| HDC hdc = CreateCompatibleDC(NULL); |
| HFONT font = CreateFontIndirect(&lf); |
| HFONT savefont = (HFONT)SelectObject(hdc, font); |
| HFONT designFont = NULL; |
| |
| const char stem_chars[] = {'i', 'I', '!', '1'}; |
| int16_t min_width; |
| unsigned glyphCount; |
| |
| // To request design units, create a logical font whose height is specified |
| // as unitsPerEm. |
| OUTLINETEXTMETRIC otm; |
| unsigned int otmRet = GetOutlineTextMetrics(hdc, sizeof(otm), &otm); |
| if (0 == otmRet) { |
| ensure_typeface_accessible(fontID); |
| otmRet = GetOutlineTextMetrics(hdc, sizeof(otm), &otm); |
| } |
| if (!otmRet || !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; |
| } |
| glyphCount = calculateGlyphCount(hdc); |
| |
| info = new SkAdvancedTypefaceMetrics; |
| info->fEmSize = otm.otmEMSquare; |
| info->fMultiMaster = false; |
| info->fLastGlyphID = SkToU16(glyphCount - 1); |
| info->fStyle = 0; |
| #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 (perGlyphInfo & SkAdvancedTypefaceMetrics::kToUnicode_PerGlyphInfo) { |
| populate_glyph_to_unicode(hdc, glyphCount, &(info->fGlyphToUnicode)); |
| } |
| |
| if (otm.otmTextMetrics.tmPitchAndFamily & TMPF_TRUETYPE) { |
| info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; |
| } else { |
| info->fType = SkAdvancedTypefaceMetrics::kOther_Font; |
| info->fItalicAngle = 0; |
| info->fAscent = 0; |
| info->fDescent = 0; |
| info->fStemV = 0; |
| info->fCapHeight = 0; |
| info->fBBox = SkIRect::MakeEmpty(); |
| return info; |
| } |
| |
| // 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. |
| min_width = SHRT_MAX; |
| info->fStemV = 0; |
| 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 & |
| SkAdvancedTypefaceMetrics::kHAdvance_PerGlyphInfo) { |
| if (info->fStyle & SkAdvancedTypefaceMetrics::kFixedPitch_Style) { |
| appendRange(&info->fGlyphWidths, 0); |
| info->fGlyphWidths->fAdvance.append(1, &min_width); |
| finishRange(info->fGlyphWidths.get(), 0, |
| SkAdvancedTypefaceMetrics::WidthRange::kDefault); |
| } else { |
| info->fGlyphWidths.reset( |
| getAdvanceData(hdc, |
| glyphCount, |
| glyphIDs, |
| glyphIDsCount, |
| &getWidthAdvance)); |
| } |
| } |
| |
| 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 SkCreateTypefaceFromLOGFONT(get_default_font()); |
| } |
| |
| SkStream* SkFontHost::OpenStream(SkFontID uniqueID) { |
| const DWORD kTTCTag = |
| SkEndian_SwapBE32(SkSetFourByteTag('t', 't', 'c', 'f')); |
| LOGFONT lf; |
| GetLogFontByID(uniqueID, &lf); |
| |
| HDC hdc = ::CreateCompatibleDC(NULL); |
| HFONT font = CreateFontIndirect(&lf); |
| HFONT savefont = (HFONT)SelectObject(hdc, font); |
| |
| SkMemoryStream* stream = NULL; |
| DWORD tables[2] = {kTTCTag, 0}; |
| for (int i = 0; i < SK_ARRAY_COUNT(tables); i++) { |
| size_t bufferSize = GetFontData(hdc, tables[i], 0, NULL, 0); |
| if (bufferSize == GDI_ERROR) { |
| ensure_typeface_accessible(uniqueID); |
| bufferSize = GetFontData(hdc, tables[i], 0, NULL, 0); |
| } |
| if (bufferSize != GDI_ERROR) { |
| stream = new SkMemoryStream(bufferSize); |
| if (GetFontData(hdc, tables[i], 0, (void*)stream->getMemoryBase(), |
| bufferSize)) { |
| break; |
| } else { |
| 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 familyName. |
| 2) If familyName 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) { |
| LOGFONT lf; |
| if (NULL == familyFace && NULL == familyName) { |
| lf = get_default_font(); |
| } else if (familyFace) { |
| LogFontTypeface* face = (LogFontTypeface*)familyFace; |
| lf = face->fLogFont; |
| } else { |
| memset(&lf, 0, sizeof(LOGFONT)); |
| #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'; |
| } |
| setStyle(&lf, style); |
| return SkCreateTypefaceFromLOGFONT(lf); |
| } |
| |
| SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { |
| printf("SkFontHost::CreateTypefaceFromFile unimplemented"); |
| return NULL; |
| } |
| |
| void SkFontHost::FilterRec(SkScalerContext::Rec* rec) { |
| unsigned flagsWeDontSupport = SkScalerContext::kDevKernText_Flag | |
| SkScalerContext::kAutohinting_Flag | |
| SkScalerContext::kEmbeddedBitmapText_Flag | |
| SkScalerContext::kEmbolden_Flag | |
| SkScalerContext::kSubpixelPositioning_Flag | |
| SkScalerContext::kLCD_BGROrder_Flag | |
| SkScalerContext::kLCD_Vertical_Flag; |
| rec->fFlags &= ~flagsWeDontSupport; |
| |
| SkPaint::Hinting h = rec->getHinting(); |
| |
| // I think we can support no-hinting, if we get hires outlines and just |
| // use skia to rasterize into a gray-scale mask... |
| #if 0 |
| switch (h) { |
| case SkPaint::kNo_Hinting: |
| case SkPaint::kSlight_Hinting: |
| h = SkPaint::kNo_Hinting; |
| break; |
| case SkPaint::kNormal_Hinting: |
| case SkPaint::kFull_Hinting: |
| h = SkPaint::kNormal_Hinting; |
| break; |
| default: |
| SkDEBUGFAIL("unknown hinting"); |
| } |
| #else |
| h = SkPaint::kNormal_Hinting; |
| #endif |
| rec->setHinting(h); |
| |
| // for compatibility at the moment, discretize luminance to 3 settings |
| // black, white, gray. This helps with fontcache utilization, since we |
| // won't create multiple entries that in the end map to the same results. |
| { |
| unsigned lum = rec->getLuminanceByte(); |
| if (lum <= BLACK_LUMINANCE_LIMIT) { |
| lum = 0; |
| } else if (lum >= WHITE_LUMINANCE_LIMIT) { |
| lum = SkScalerContext::kLuminance_Max; |
| } else { |
| lum = SkScalerContext::kLuminance_Max >> 1; |
| } |
| rec->setLuminanceBits(lum); |
| } |
| |
| // turn this off since GDI might turn A8 into BW! Need a bigger fix. |
| #if 0 |
| // Disable LCD when rotated, since GDI's output is ugly |
| if (isLCD(*rec) && !isAxisAligned(*rec)) { |
| rec->fMaskFormat = SkMask::kA8_Format; |
| } |
| #endif |
| |
| #if 0 |
| if (SkMask::kLCD16_Format == rec->fMaskFormat) { |
| rec->fMaskFormat = SkMask::kLCD32_Format; |
| } |
| #endif |
| } |
| |
| #endif // WIN32 |
