示例#1
0
void Transform::transform(GLfixed* point, int x, int y) const
{
    SkPoint s;
    mTransform.mapXY(SkIntToScalar(x), SkIntToScalar(y), &s);
    point[0] = SkScalarToFixed(s.fX);
    point[1] = SkScalarToFixed(s.fY);
}
void SkRandomScalerContext::generateAdvance(SkGlyph* glyph) {
    fProxy->getAdvance(glyph);

    SkVector advance;
    fMatrix.mapXY(SkFixedToScalar(glyph->fAdvanceX),
                  SkFixedToScalar(glyph->fAdvanceY), &advance);
    glyph->fAdvanceX = SkScalarToFixed(advance.fX);
    glyph->fAdvanceY = SkScalarToFixed(advance.fY);
}
示例#3
0
void SkScalerContext_DW::generateAdvance(SkGlyph* glyph) {
    //Delta is the difference between the right/left side bearing metric
    //and where the right/left side bearing ends up after hinting.
    //DirectWrite does not provide this information.
    glyph->fRsbDelta = 0;
    glyph->fLsbDelta = 0;

    glyph->fAdvanceX = 0;
    glyph->fAdvanceY = 0;

    uint16_t glyphId = glyph->getGlyphID();
    DWRITE_GLYPH_METRICS gm;

    if (DWRITE_MEASURING_MODE_GDI_CLASSIC == fMeasuringMode ||
        DWRITE_MEASURING_MODE_GDI_NATURAL == fMeasuringMode)
    {
        HRVM(fTypeface->fDWriteFontFace->GetGdiCompatibleGlyphMetrics(
                 fTextSizeMeasure,
                 1.0f, // pixelsPerDip
                 &fGsA,
                 DWRITE_MEASURING_MODE_GDI_NATURAL == fMeasuringMode,
                 &glyphId, 1,
                 &gm),
             "Could not get gdi compatible glyph metrics.");
    } else {
        HRVM(fTypeface->fDWriteFontFace->GetDesignGlyphMetrics(&glyphId, 1, &gm),
             "Could not get design metrics.");
    }

    DWRITE_FONT_METRICS dwfm;
    fTypeface->fDWriteFontFace->GetMetrics(&dwfm);
    SkScalar advanceX = SkScalarMulDiv(fTextSizeMeasure,
                                       SkIntToScalar(gm.advanceWidth),
                                       SkIntToScalar(dwfm.designUnitsPerEm));

    SkVector vecs[1] = { { advanceX, 0 } };
    if (DWRITE_MEASURING_MODE_GDI_CLASSIC == fMeasuringMode ||
        DWRITE_MEASURING_MODE_GDI_NATURAL == fMeasuringMode)
    {
        // DirectWrite produced 'compatible' metrics, but while close,
        // the end result is not always an integer as it would be with GDI.
        vecs[0].fX = SkScalarRoundToScalar(advanceX);
        fG_inv.mapVectors(vecs, SK_ARRAY_COUNT(vecs));
    } else {
        fSkXform.mapVectors(vecs, SK_ARRAY_COUNT(vecs));
    }

    glyph->fAdvanceX = SkScalarToFixed(vecs[0].fX);
    glyph->fAdvanceY = SkScalarToFixed(vecs[0].fY);
}
示例#4
0
文件: SkColor.cpp 项目: yck12345/skia
SkColor SkHSVToColor(U8CPU a, const SkScalar hsv[3]) {
    SkASSERT(hsv);

    U8CPU s = SkUnitScalarClampToByte(hsv[1]);
    U8CPU v = SkUnitScalarClampToByte(hsv[2]);

    if (0 == s) { // shade of gray
        return SkColorSetARGB(a, v, v, v);
    }
    SkFixed hx = (hsv[0] < 0 || hsv[0] >= SkIntToScalar(360)) ? 0 : SkScalarToFixed(hsv[0]/60);
    SkFixed f = hx & 0xFFFF;

    unsigned v_scale = SkAlpha255To256(v);
    unsigned p = SkAlphaMul(255 - s, v_scale);
    unsigned q = SkAlphaMul(255 - (s * f >> 16), v_scale);
    unsigned t = SkAlphaMul(255 - (s * (SK_Fixed1 - f) >> 16), v_scale);

    unsigned r, g, b;

    SkASSERT((unsigned)(hx >> 16) < 6);
    switch (hx >> 16) {
        case 0: r = v; g = t; b = p; break;
        case 1: r = q; g = v; b = p; break;
        case 2: r = p; g = v; b = t; break;
        case 3: r = p; g = q; b = v; break;
        case 4: r = t;  g = p; b = v; break;
        default: r = v; g = p; b = q; break;
    }
    return SkColorSetARGB(a, r, g, b);
}
示例#5
0
static void test_cubic2() {
    const char* str = "M2242 -590088L-377758 9.94099e+07L-377758 9.94099e+07L2242 -590088Z";
    SkPath path;
    SkParsePath::FromSVGString(str, &path);

    {
#ifdef SK_BUILD_FOR_WIN
        // windows doesn't have strtof
        float x = (float)strtod("9.94099e+07", NULL);
#else
        float x = strtof("9.94099e+07", NULL);
#endif
        int ix = (int)x;
        int fx = (int)(x * 65536);
        int ffx = SkScalarToFixed(x);
        printf("%g %x %x %x\n", x, ix, fx, ffx);

        SkRect r = path.getBounds();
        SkIRect ir;
        r.round(&ir);
        printf("[%g %g %g %g] [%x %x %x %x]\n",
               SkScalarToDouble(r.fLeft), SkScalarToDouble(r.fTop),
               SkScalarToDouble(r.fRight), SkScalarToDouble(r.fBottom),
               ir.fLeft, ir.fTop, ir.fRight, ir.fBottom);
    }

    SkBitmap bitmap;
    bitmap.setConfig(SkBitmap::kARGB_8888_Config, 300, 200);
    bitmap.allocPixels();

    SkCanvas canvas(bitmap);
    SkPaint paint;
    paint.setAntiAlias(true);
    canvas.drawPath(path, paint);
}
void SkRandomScalerContext::generateMetrics(SkGlyph* glyph) {
    fProxy->getAdvance(glyph);

    SkVector advance;
    fMatrix.mapXY(SkFixedToScalar(glyph->fAdvanceX),
                  SkFixedToScalar(glyph->fAdvanceY), &advance);
    glyph->fAdvanceX = SkScalarToFixed(advance.fX);
    glyph->fAdvanceY = SkScalarToFixed(advance.fY);

    SkPath path;
    fProxy->getPath(*glyph, &path);
    path.transform(fMatrix);

    SkRect storage;
    const SkPaint& paint = fFace->paint();
    const SkRect& newBounds = paint.doComputeFastBounds(path.getBounds(),
                                                        &storage,
                                                        SkPaint::kFill_Style);
    SkIRect ibounds;
    newBounds.roundOut(&ibounds);
    glyph->fLeft = ibounds.fLeft;
    glyph->fTop = ibounds.fTop;
    glyph->fWidth = ibounds.width();
    glyph->fHeight = ibounds.height();

    // Here we will change the mask format of the glyph
    // NOTE this is being overridden by the base class
    SkMask::Format format;
    switch (glyph->getGlyphID() % 6) {
        case 0:
            format = SkMask::kLCD16_Format;
            break;
        case 1:
            format = SkMask::kA8_Format;
            break;
        case 2:
            format = SkMask::kARGB32_Format;
            break;
        default:
            // we will fiddle with these in generate image
            format = (SkMask::Format)MASK_FORMAT_UNKNOWN;
    }

    glyph->fMaskFormat = format;
}
/*
 *  Analyze filter-quality and matrix, and decide how to implement that.
 *
 *  In general, we cascade down the request level [ High ... None ]
 *  - for a given level, if we can fulfill it, fine, else
 *    - else we downgrade to the next lower level and try again.
 *  We can always fulfill requests for Low and None
 *  - sometimes we will "ignore" Low and give None, but this is likely a legacy perf hack
 *    and may be removed.
 */
bool SkBitmapProcState::chooseProcs() {
    fInvProc            = SkMatrixPriv::GetMapXYProc(fInvMatrix);
    fInvSx              = SkScalarToFixed(fInvMatrix.getScaleX());
    fInvSxFractionalInt = SkScalarToFractionalInt(fInvMatrix.getScaleX());
    fInvKy              = SkScalarToFixed(fInvMatrix.getSkewY());
    fInvKyFractionalInt = SkScalarToFractionalInt(fInvMatrix.getSkewY());

    fAlphaScale = SkAlpha255To256(SkColorGetA(fPaintColor));

    fShaderProc32 = nullptr;
    fShaderProc16 = nullptr;
    fSampleProc32 = nullptr;

    const bool trivialMatrix = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0;
    const bool clampClamp = SkShader::kClamp_TileMode == fTileModeX &&
                            SkShader::kClamp_TileMode == fTileModeY;

    return this->chooseScanlineProcs(trivialMatrix, clampClamp);
}
示例#8
0
// static
void SkPDFScalar::Append(SkScalar value, SkWStream* stream) {
    // The range of reals in PDF/A is the same as SkFixed: +/- 32,767 and
    // +/- 1/65,536 (though integers can range from 2^31 - 1 to -2^31).
    // When using floats that are outside the whole value range, we can use
    // integers instead.


#if defined(SK_SCALAR_IS_FIXED)
    stream->writeScalarAsText(value);
    return;
#endif  // SK_SCALAR_IS_FIXED

#if !defined(SK_ALLOW_LARGE_PDF_SCALARS)
    if (value > 32767 || value < -32767) {
        stream->writeDecAsText(SkScalarRound(value));
        return;
    }

    char buffer[SkStrAppendScalar_MaxSize];
    char* end = SkStrAppendFixed(buffer, SkScalarToFixed(value));
    stream->write(buffer, end - buffer);
    return;
#endif  // !SK_ALLOW_LARGE_PDF_SCALARS

#if defined(SK_SCALAR_IS_FLOAT) && defined(SK_ALLOW_LARGE_PDF_SCALARS)
    // Floats have 24bits of significance, so anything outside that range is
    // no more precise than an int. (Plus PDF doesn't support scientific
    // notation, so this clamps to SK_Max/MinS32).
    if (value > (1 << 24) || value < -(1 << 24)) {
        stream->writeDecAsText(value);
        return;
    }
    // Continue to enforce the PDF limits for small floats.
    if (value < 1.0f/65536 && value > -1.0f/65536) {
        stream->writeDecAsText(0);
        return;
    }
    // SkStrAppendFloat might still use scientific notation, so use snprintf
    // directly..
    static const int kFloat_MaxSize = 19;
    char buffer[kFloat_MaxSize];
    int len = SNPRINTF(buffer, kFloat_MaxSize, "%#.8f", value);
    // %f always prints trailing 0s, so strip them.
    for (; buffer[len - 1] == '0' && len > 0; len--) {
        buffer[len - 1] = '\0';
    }
    if (buffer[len - 1] == '.') {
        buffer[len - 1] = '\0';
    }
    stream->writeText(buffer);
    return;
#endif  // SK_SCALAR_IS_FLOAT && SK_ALLOW_LARGE_PDF_SCALARS
}
GrTexture* GrCircleBlurFragmentProcessor::CreateCircleBlurProfileTexture(
                                                                GrTextureProvider* textureProvider,
                                                                const SkRect& circle,
                                                                float sigma,
                                                                float* offset) {
    float halfWH = circle.width() / 2.0f;

    int size;
    compute_profile_offset_and_size(halfWH, sigma, offset, &size);

    GrSurfaceDesc texDesc;
    texDesc.fWidth = size;
    texDesc.fHeight = 1;
    texDesc.fConfig = kAlpha_8_GrPixelConfig;

    static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain();
    GrUniqueKey key;
    GrUniqueKey::Builder builder(&key, kDomain, 2);
    // The profile curve varies with both the sigma of the Gaussian and the size of the
    // disk. Quantizing to 16.16 should be close enough though.
    builder[0] = SkScalarToFixed(sigma);
    builder[1] = SkScalarToFixed(halfWH);
    builder.finish();

    GrTexture *blurProfile = textureProvider->findAndRefTextureByUniqueKey(key);

    if (!blurProfile) {
        SkAutoTDeleteArray<uint8_t> profile(create_profile(halfWH, sigma));

        blurProfile = textureProvider->createTexture(texDesc, SkBudgeted::kYes, profile.get(), 0);
        if (blurProfile) {
            textureProvider->assignUniqueKeyToTexture(key, blurProfile);
        }
    }

    return blurProfile;
}
示例#10
0
bool SkBitmapProcState::chooseProcs(const SkMatrix& inv, const SkPaint& paint) {
    if (fOrigBitmap.width() == 0 || fOrigBitmap.height() == 0) {
        return false;
    }

    const SkMatrix* m;
    bool trivial_matrix = (inv.getType() & ~SkMatrix::kTranslate_Mask) == 0;
    bool clamp_clamp = SkShader::kClamp_TileMode == fTileModeX &&
    SkShader::kClamp_TileMode == fTileModeY;

    if (clamp_clamp || trivial_matrix) {
        m = &inv;
    } else {
        fUnitInvMatrix = inv;
        fUnitInvMatrix.postIDiv(fOrigBitmap.width(), fOrigBitmap.height());
        m = &fUnitInvMatrix;
    }

    fBitmap = &fOrigBitmap;
    if (fOrigBitmap.hasMipMap()) {
        int shift = fOrigBitmap.extractMipLevel(&fMipBitmap,
                                                SkScalarToFixed(m->getScaleX()),
                                                SkScalarToFixed(m->getSkewY()));

        if (shift > 0) {
            if (m != &fUnitInvMatrix) {
                fUnitInvMatrix = *m;
                m = &fUnitInvMatrix;
            }

            SkScalar scale = SkFixedToScalar(SK_Fixed1 >> shift);
            fUnitInvMatrix.postScale(scale, scale);

            // now point here instead of fOrigBitmap
            fBitmap = &fMipBitmap;
        }
    }
示例#11
0
static size_t linebreak(const char text[], const char stop[], const SkPaint& paint, SkScalar margin)
{
    const char* start = text;

    SkAutoGlyphCache    ac(paint, NULL);
    SkGlyphCache*       cache = ac.getCache();
    SkFixed             w = 0;
    SkFixed             limit = SkScalarToFixed(margin);
    SkAutoKern          autokern;

    const char* word_start = text;
    int         prevWS = true;

    while (text < stop)
    {
        const char* prevText = text;
        SkUnichar   uni = SkUTF8_NextUnichar(&text);
        int         currWS = is_ws(uni);
        const SkGlyph&  glyph = cache->getUnicharMetrics(uni);

        if (!currWS && prevWS)
            word_start = prevText;
        prevWS = currWS;

        w += autokern.adjust(glyph) + glyph.fAdvanceX;
        if (w > limit)
        {
            if (currWS) // eat the rest of the whitespace
            {
                while (text < stop && is_ws(SkUTF8_ToUnichar(text)))
                    text += SkUTF8_CountUTF8Bytes(text);
            }
            else    // backup until a whitespace (or 1 char)
            {
                if (word_start == start)
                {
                    if (prevText > start)
                        text = prevText;
                }
                else
                    text = word_start;
            }
            break;
        }
    }
    return text - start;
}
示例#12
0
SkGradientShaderBase::SkGradientShaderBase(const Descriptor& desc, const SkMatrix& ptsToUnit)
    : INHERITED(desc.fLocalMatrix)
    , fPtsToUnit(ptsToUnit)
{
    fPtsToUnit.getType();  // Precache so reads are threadsafe.
    SkASSERT(desc.fCount > 1);

    fGradFlags = SkToU8(desc.fGradFlags);

    SkASSERT((unsigned)desc.fTileMode < SkShader::kTileModeCount);
    SkASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gTileProcs));
    fTileMode = desc.fTileMode;
    fTileProc = gTileProcs[desc.fTileMode];

    /*  Note: we let the caller skip the first and/or last position.
        i.e. pos[0] = 0.3, pos[1] = 0.7
        In these cases, we insert dummy entries to ensure that the final data
        will be bracketed by [0, 1].
        i.e. our_pos[0] = 0, our_pos[1] = 0.3, our_pos[2] = 0.7, our_pos[3] = 1

        Thus colorCount (the caller's value, and fColorCount (our value) may
        differ by up to 2. In the above example:
            colorCount = 2
            fColorCount = 4
     */
    fColorCount = desc.fCount;
    // check if we need to add in dummy start and/or end position/colors
    bool dummyFirst = false;
    bool dummyLast = false;
    if (desc.fPos) {
        dummyFirst = desc.fPos[0] != 0;
        dummyLast = desc.fPos[desc.fCount - 1] != SK_Scalar1;
        fColorCount += dummyFirst + dummyLast;
    }

    if (fColorCount > kColorStorageCount) {
        size_t size = sizeof(SkColor) + sizeof(Rec);
        if (desc.fPos) {
            size += sizeof(SkScalar);
        }
        fOrigColors = reinterpret_cast<SkColor*>(
                                        sk_malloc_throw(size * fColorCount));
    }
    else {
        fOrigColors = fStorage;
    }

    // Now copy over the colors, adding the dummies as needed
    {
        SkColor* origColors = fOrigColors;
        if (dummyFirst) {
            *origColors++ = desc.fColors[0];
        }
        memcpy(origColors, desc.fColors, desc.fCount * sizeof(SkColor));
        if (dummyLast) {
            origColors += desc.fCount;
            *origColors = desc.fColors[desc.fCount - 1];
        }
    }

    if (desc.fPos && fColorCount) {
        fOrigPos = (SkScalar*)(fOrigColors + fColorCount);
        fRecs = (Rec*)(fOrigPos + fColorCount);
    } else {
        fOrigPos = nullptr;
        fRecs = (Rec*)(fOrigColors + fColorCount);
    }

    if (fColorCount > 2) {
        Rec* recs = fRecs;
        recs->fPos = 0;
        //  recs->fScale = 0; // unused;
        recs += 1;
        if (desc.fPos) {
            SkScalar* origPosPtr = fOrigPos;
            *origPosPtr++ = 0;

            /*  We need to convert the user's array of relative positions into
                fixed-point positions and scale factors. We need these results
                to be strictly monotonic (no two values equal or out of order).
                Hence this complex loop that just jams a zero for the scale
                value if it sees a segment out of order, and it assures that
                we start at 0 and end at 1.0
            */
            SkScalar prev = 0;
            int startIndex = dummyFirst ? 0 : 1;
            int count = desc.fCount + dummyLast;
            for (int i = startIndex; i < count; i++) {
                // force the last value to be 1.0
                SkScalar curr;
                if (i == desc.fCount) {  // we're really at the dummyLast
                    curr = 1;
                } else {
                    curr = SkScalarPin(desc.fPos[i], 0, 1);
                }
                *origPosPtr++ = curr;

                recs->fPos = SkScalarToFixed(curr);
                SkFixed diff = SkScalarToFixed(curr - prev);
                if (diff > 0) {
                    recs->fScale = (1 << 24) / diff;
                } else {
                    recs->fScale = 0; // ignore this segment
                }
                // get ready for the next value
                prev = curr;
                recs += 1;
            }
        } else {    // assume even distribution
            fOrigPos = nullptr;

            SkFixed dp = SK_Fixed1 / (desc.fCount - 1);
            SkFixed p = dp;
            SkFixed scale = (desc.fCount - 1) << 8;  // (1 << 24) / dp
            for (int i = 1; i < desc.fCount - 1; i++) {
                recs->fPos   = p;
                recs->fScale = scale;
                recs += 1;
                p += dp;
            }
            recs->fPos = SK_Fixed1;
            recs->fScale = scale;
        }
    } else if (desc.fPos) {
        SkASSERT(2 == fColorCount);
        fOrigPos[0] = SkScalarPin(desc.fPos[0], 0, 1);
        fOrigPos[1] = SkScalarPin(desc.fPos[1], fOrigPos[0], 1);
        if (0 == fOrigPos[0] && 1 == fOrigPos[1]) {
            fOrigPos = nullptr;
        }
    }
    this->initCommon();
}
 virtual void flatten(SkFlattenableWriteBuffer& b) {
 //    this->INHERITED::flatten(b);  How can we know if this is legal????
     b.write32(SkScalarToFixed(fExp));
 }
示例#14
0
static hb_position_t SkiaScalarToHarfBuzzPosition(SkScalar value)
{
    return SkScalarToFixed(value);
}
SkGradientShaderBase::SkGradientShaderBase(const SkColor colors[], const SkScalar pos[],
             int colorCount, SkShader::TileMode mode, SkUnitMapper* mapper) {
    SkASSERT(colorCount > 1);

    fCacheAlpha = 256;  // init to a value that paint.getAlpha() can't return

    fMapper = mapper;
    SkSafeRef(mapper);

    SkASSERT((unsigned)mode < SkShader::kTileModeCount);
    SkASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gTileProcs));
    fTileMode = mode;
    fTileProc = gTileProcs[mode];

    fCache16 = fCache16Storage = NULL;
    fCache32 = NULL;
    fCache32PixelRef = NULL;

    /*  Note: we let the caller skip the first and/or last position.
        i.e. pos[0] = 0.3, pos[1] = 0.7
        In these cases, we insert dummy entries to ensure that the final data
        will be bracketed by [0, 1].
        i.e. our_pos[0] = 0, our_pos[1] = 0.3, our_pos[2] = 0.7, our_pos[3] = 1

        Thus colorCount (the caller's value, and fColorCount (our value) may
        differ by up to 2. In the above example:
            colorCount = 2
            fColorCount = 4
     */
    fColorCount = colorCount;
    // check if we need to add in dummy start and/or end position/colors
    bool dummyFirst = false;
    bool dummyLast = false;
    if (pos) {
        dummyFirst = pos[0] != 0;
        dummyLast = pos[colorCount - 1] != SK_Scalar1;
        fColorCount += dummyFirst + dummyLast;
    }

    if (fColorCount > kColorStorageCount) {
        size_t size = sizeof(SkColor) + sizeof(Rec);
        fOrigColors = reinterpret_cast<SkColor*>(
                                        sk_malloc_throw(size * fColorCount));
    }
    else {
        fOrigColors = fStorage;
    }

    // Now copy over the colors, adding the dummies as needed
    {
        SkColor* origColors = fOrigColors;
        if (dummyFirst) {
            *origColors++ = colors[0];
        }
        memcpy(origColors, colors, colorCount * sizeof(SkColor));
        if (dummyLast) {
            origColors += colorCount;
            *origColors = colors[colorCount - 1];
        }
    }

    fRecs = (Rec*)(fOrigColors + fColorCount);
    if (fColorCount > 2) {
        Rec* recs = fRecs;
        recs->fPos = 0;
        //  recs->fScale = 0; // unused;
        recs += 1;
        if (pos) {
            /*  We need to convert the user's array of relative positions into
                fixed-point positions and scale factors. We need these results
                to be strictly monotonic (no two values equal or out of order).
                Hence this complex loop that just jams a zero for the scale
                value if it sees a segment out of order, and it assures that
                we start at 0 and end at 1.0
            */
            SkFixed prev = 0;
            int startIndex = dummyFirst ? 0 : 1;
            int count = colorCount + dummyLast;
            for (int i = startIndex; i < count; i++) {
                // force the last value to be 1.0
                SkFixed curr;
                if (i == colorCount) {  // we're really at the dummyLast
                    curr = SK_Fixed1;
                } else {
                    curr = SkScalarToFixed(pos[i]);
                }
                // pin curr withing range
                if (curr < 0) {
                    curr = 0;
                } else if (curr > SK_Fixed1) {
                    curr = SK_Fixed1;
                }
                recs->fPos = curr;
                if (curr > prev) {
                    recs->fScale = (1 << 24) / (curr - prev);
                } else {
                    recs->fScale = 0; // ignore this segment
                }
                // get ready for the next value
                prev = curr;
                recs += 1;
            }
        } else {    // assume even distribution
            SkFixed dp = SK_Fixed1 / (colorCount - 1);
            SkFixed p = dp;
            SkFixed scale = (colorCount - 1) << 8;  // (1 << 24) / dp
            for (int i = 1; i < colorCount; i++) {
                recs->fPos   = p;
                recs->fScale = scale;
                recs += 1;
                p += dp;
            }
        }
    }
    this->initCommon();
}
示例#16
0
SkScalerContext_FreeType::SkScalerContext_FreeType(const SkDescriptor* desc)
        : SkScalerContext(desc), fFTSize(NULL) {
    SkAutoMutexAcquire  ac(gFTMutex);

    FT_Error    err;

    if (gFTCount == 0) {
        err = FT_Init_FreeType(&gFTLibrary);
//        SkDEBUGF(("FT_Init_FreeType returned %d\n", err));
        SkASSERT(err == 0);
    }
    ++gFTCount;

    // load the font file
    fFaceRec = ref_ft_face(fRec.fFontID);
    fFace = fFaceRec ? fFaceRec->fFace : NULL;

    // compute our factors from the record

    SkMatrix    m;

    fRec.getSingleMatrix(&m);

#ifdef DUMP_STRIKE_CREATION
    SkString     keyString;
    SkFontHost::GetDescriptorKeyString(desc, &keyString);
    printf("========== strike [%g %g %g] [%g %g %g %g] hints %d format %d %s\n", SkScalarToFloat(fRec.fTextSize),
           SkScalarToFloat(fRec.fPreScaleX), SkScalarToFloat(fRec.fPreSkewX),
           SkScalarToFloat(fRec.fPost2x2[0][0]), SkScalarToFloat(fRec.fPost2x2[0][1]),
           SkScalarToFloat(fRec.fPost2x2[1][0]), SkScalarToFloat(fRec.fPost2x2[1][1]),
           fRec.fHints, fRec.fMaskFormat, keyString.c_str());
#endif

    //  now compute our scale factors
    SkScalar    sx = m.getScaleX();
    SkScalar    sy = m.getScaleY();

    if (m.getSkewX() || m.getSkewY() || sx < 0 || sy < 0) {
        // sort of give up on hinting
        sx = SkMaxScalar(SkScalarAbs(sx), SkScalarAbs(m.getSkewX()));
        sy = SkMaxScalar(SkScalarAbs(m.getSkewY()), SkScalarAbs(sy));
        sx = sy = SkScalarAve(sx, sy);

        SkScalar inv = SkScalarInvert(sx);

        // flip the skew elements to go from our Y-down system to FreeType's
        fMatrix22.xx = SkScalarToFixed(SkScalarMul(m.getScaleX(), inv));
        fMatrix22.xy = -SkScalarToFixed(SkScalarMul(m.getSkewX(), inv));
        fMatrix22.yx = -SkScalarToFixed(SkScalarMul(m.getSkewY(), inv));
        fMatrix22.yy = SkScalarToFixed(SkScalarMul(m.getScaleY(), inv));
    } else {
        fMatrix22.xx = fMatrix22.yy = SK_Fixed1;
        fMatrix22.xy = fMatrix22.yx = 0;
    }

    fScaleX = SkScalarToFixed(sx);
    fScaleY = SkScalarToFixed(sy);

    // compute the flags we send to Load_Glyph
    {
        uint32_t flags = FT_LOAD_DEFAULT;
        uint32_t render_flags = FT_LOAD_TARGET_NORMAL;

        // we force autohinting at the moment

        switch (fRec.fHints) {
        case kNo_Hints:
            flags |= FT_LOAD_NO_HINTING;
            break;
        case kSubpixel_Hints:
            flags |= FT_LOAD_FORCE_AUTOHINT;
            render_flags = FT_LOAD_TARGET_LIGHT;
            break;
        case kNormal_Hints:
            flags |= FT_LOAD_FORCE_AUTOHINT;
#ifdef ANDROID
            /*  Switch to light hinting (vertical only) to address some chars
                that behaved poorly with NORMAL. In the future we could consider
                making this choice exposed at runtime to the caller.
            */
            render_flags = FT_LOAD_TARGET_LIGHT;
#endif
            break;
        }

        if (SkMask::kBW_Format == fRec.fMaskFormat)
            render_flags = FT_LOAD_TARGET_MONO;
        else if (SkMask::kLCD_Format == fRec.fMaskFormat)
            render_flags = FT_LOAD_TARGET_LCD;

        fLoadGlyphFlags = flags | render_flags;
    }

    // now create the FT_Size

    {
        FT_Error    err;

        err = FT_New_Size(fFace, &fFTSize);
        if (err != 0) {
            SkDEBUGF(("SkScalerContext_FreeType::FT_New_Size(%x): FT_Set_Char_Size(0x%x, 0x%x) returned 0x%x\n",
                        fFaceRec->fFontID, fScaleX, fScaleY, err));
            fFace = NULL;
            return;
        }

        err = FT_Activate_Size(fFTSize);
        if (err != 0) {
            SkDEBUGF(("SkScalerContext_FreeType::FT_Activate_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
                        fFaceRec->fFontID, fScaleX, fScaleY, err));
            fFTSize = NULL;
        }

        err = FT_Set_Char_Size( fFace,
                                SkFixedToFDot6(fScaleX), SkFixedToFDot6(fScaleY),
                                72, 72);
        if (err != 0) {
            SkDEBUGF(("SkScalerContext_FreeType::FT_Set_Char_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
                        fFaceRec->fFontID, fScaleX, fScaleY, err));
            fFace = NULL;
            return;
        }

        FT_Set_Transform( fFace, &fMatrix22, NULL);
    }
}
示例#17
0
/*
 *  Analyze filter-quality and matrix, and decide how to implement that.
 *
 *  In general, we cascade down the request level [ High ... None ]
 *  - for a given level, if we can fulfill it, fine, else
 *    - else we downgrade to the next lower level and try again.
 *  We can always fulfill requests for Low and None
 *  - sometimes we will "ignore" Low and give None, but this is likely a legacy perf hack
 *    and may be removed.
 */
bool SkBitmapProcState::chooseProcs(const SkMatrix& inv, const SkPaint& paint) {
    fPixmap.reset();
    fInvMatrix = inv;
    fFilterLevel = paint.getFilterQuality();

    const int origW = fProvider.info().width();
    const int origH = fProvider.info().height();
    bool allow_ignore_fractional_translate = true;  // historical default
    if (kMedium_SkFilterQuality == fFilterLevel) {
        allow_ignore_fractional_translate = false;
    }

    SkDefaultBitmapController controller;
    fBMState = controller.requestBitmap(fProvider, inv, paint.getFilterQuality(),
                                        fBMStateStorage.get(), fBMStateStorage.size());
    // Note : we allow the controller to return an empty (zero-dimension) result. Should we?
    if (nullptr == fBMState || fBMState->pixmap().info().isEmpty()) {
        return false;
    }
    fPixmap = fBMState->pixmap();
    fInvMatrix = fBMState->invMatrix();
    fFilterLevel = fBMState->quality();
    SkASSERT(fPixmap.addr());
    
    bool trivialMatrix = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0;
    bool clampClamp = SkShader::kClamp_TileMode == fTileModeX &&
                      SkShader::kClamp_TileMode == fTileModeY;

    // Most of the scanline procs deal with "unit" texture coordinates, as this
    // makes it easy to perform tiling modes (repeat = (x & 0xFFFF)). To generate
    // those, we divide the matrix by its dimensions here.
    //
    // We don't do this if we're either trivial (can ignore the matrix) or clamping
    // in both X and Y since clamping to width,height is just as easy as to 0xFFFF.

    if (!(clampClamp || trivialMatrix)) {
        fInvMatrix.postIDiv(fPixmap.width(), fPixmap.height());
    }

    // Now that all possible changes to the matrix have taken place, check
    // to see if we're really close to a no-scale matrix.  If so, explicitly
    // set it to be so.  Subsequent code may inspect this matrix to choose
    // a faster path in this case.

    // This code will only execute if the matrix has some scale component;
    // if it's already pure translate then we won't do this inversion.

    if (matrix_only_scale_translate(fInvMatrix)) {
        SkMatrix forward;
        if (fInvMatrix.invert(&forward)) {
            if ((clampClamp && allow_ignore_fractional_translate)
                           ? just_trans_clamp(forward, fPixmap)
                           : just_trans_general(forward)) {
                fInvMatrix.setTranslate(-forward.getTranslateX(), -forward.getTranslateY());
            }
        }
    }

    fInvProc        = fInvMatrix.getMapXYProc();
    fInvType        = fInvMatrix.getType();
    fInvSx          = SkScalarToFixed(fInvMatrix.getScaleX());
    fInvSxFractionalInt = SkScalarToFractionalInt(fInvMatrix.getScaleX());
    fInvKy          = SkScalarToFixed(fInvMatrix.getSkewY());
    fInvKyFractionalInt = SkScalarToFractionalInt(fInvMatrix.getSkewY());

    fAlphaScale = SkAlpha255To256(paint.getAlpha());

    fShaderProc32 = nullptr;
    fShaderProc16 = nullptr;
    fSampleProc32 = nullptr;

    // recompute the triviality of the matrix here because we may have
    // changed it!

    trivialMatrix = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0;

    // If our target pixmap is the same as the original, then we revert back to legacy behavior
    // and allow the code to ignore fractional translate.
    //
    // The width/height check allows allow_ignore_fractional_translate to stay false if we
    // previously set it that way (e.g. we started in kMedium).
    //
    if (fPixmap.width() == origW && fPixmap.height() == origH) {
        allow_ignore_fractional_translate = true;
    }

    if (kLow_SkFilterQuality == fFilterLevel && allow_ignore_fractional_translate) {
        // Only try bilerp if the matrix is "interesting" and
        // the image has a suitable size.

        if (fInvType <= SkMatrix::kTranslate_Mask ||
            !valid_for_filtering(fPixmap.width() | fPixmap.height()))
        {
            fFilterLevel = kNone_SkFilterQuality;
        }
    }

    return this->chooseScanlineProcs(trivialMatrix, clampClamp, paint);
}
void GrStencilAndCoverTextContext::onDrawText(GrDrawContext* drawContext, GrRenderTarget* rt,
                                              const GrClip& clip,
                                              const GrPaint& paint,
                                              const SkPaint& skPaint,
                                              const SkMatrix& viewMatrix,
                                              const char text[],
                                              size_t byteLength,
                                              SkScalar x, SkScalar y,
                                              const SkIRect& regionClipBounds) {
    SkASSERT(byteLength == 0 || text != NULL);

    if (text == NULL || byteLength == 0 /*|| fRC->isEmpty()*/) {
        return;
    }

    // This is the slow path, mainly used by Skia unit tests.  The other
    // backends (8888, gpu, ...) use device-space dependent glyph caches. In
    // order to match the glyph positions that the other code paths produce, we
    // must also use device-space dependent glyph cache. This has the
    // side-effect that the glyph shape outline will be in device-space,
    // too. This in turn has the side-effect that NVPR can not stroke the paths,
    // as the stroke in NVPR is defined in object-space.
    // NOTE: here we have following coincidence that works at the moment:
    // - When using the device-space glyphs, the transforms we pass to NVPR
    // instanced drawing are the global transforms, and the view transform is
    // identity. NVPR can not use non-affine transforms in the instanced
    // drawing. This is taken care of by SkDraw::ShouldDrawTextAsPaths since it
    // will turn off the use of device-space glyphs when perspective transforms
    // are in use.

    this->init(rt, clip, paint, skPaint, byteLength, kMaxAccuracy_RenderMode, viewMatrix,
               regionClipBounds);

    // Transform our starting point.
    if (fUsingDeviceSpaceGlyphs) {
        SkPoint loc;
        fContextInitialMatrix.mapXY(x, y, &loc);
        x = loc.fX;
        y = loc.fY;
    }

    SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();

    const char* stop = text + byteLength;

    // Measure first if needed.
    if (fSkPaint.getTextAlign() != SkPaint::kLeft_Align) {
        SkFixed    stopX = 0;
        SkFixed    stopY = 0;

        const char* textPtr = text;
        while (textPtr < stop) {
            // We don't need x, y here, since all subpixel variants will have the
            // same advance.
            const SkGlyph& glyph = glyphCacheProc(fGlyphCache, &textPtr, 0, 0);

            stopX += glyph.fAdvanceX;
            stopY += glyph.fAdvanceY;
        }
        SkASSERT(textPtr == stop);

        SkScalar alignX = SkFixedToScalar(stopX) * fTextRatio;
        SkScalar alignY = SkFixedToScalar(stopY) * fTextRatio;

        if (fSkPaint.getTextAlign() == SkPaint::kCenter_Align) {
            alignX = SkScalarHalf(alignX);
            alignY = SkScalarHalf(alignY);
        }

        x -= alignX;
        y -= alignY;
    }

    SkAutoKern autokern;

    SkFixed fixedSizeRatio = SkScalarToFixed(fTextRatio);

    SkFixed fx = SkScalarToFixed(x);
    SkFixed fy = SkScalarToFixed(y);
    while (text < stop) {
        const SkGlyph& glyph = glyphCacheProc(fGlyphCache, &text, 0, 0);
        fx += SkFixedMul(autokern.adjust(glyph), fixedSizeRatio);
        if (glyph.fWidth) {
            this->appendGlyph(drawContext, glyph, 
                              SkPoint::Make(SkFixedToScalar(fx), SkFixedToScalar(fy)));
        }

        fx += SkFixedMul(glyph.fAdvanceX, fixedSizeRatio);
        fy += SkFixedMul(glyph.fAdvanceY, fixedSizeRatio);
    }

    this->finish(drawContext);
}
static sk_sp<GrTextureProxy> create_profile_texture(GrProxyProvider* proxyProvider,
                                                    const SkRect& circle, float sigma,
                                                    float* solidRadius, float* textureRadius) {
    float circleR = circle.width() / 2.0f;
    if (circleR < SK_ScalarNearlyZero) {
        return nullptr;
    }
    // Profile textures are cached by the ratio of sigma to circle radius and by the size of the
    // profile texture (binned by powers of 2).
    SkScalar sigmaToCircleRRatio = sigma / circleR;
    // When sigma is really small this becomes a equivalent to convolving a Gaussian with a
    // half-plane. Similarly, in the extreme high ratio cases circle becomes a point WRT to the
    // Guassian and the profile texture is a just a Gaussian evaluation. However, we haven't yet
    // implemented this latter optimization.
    sigmaToCircleRRatio = SkTMin(sigmaToCircleRRatio, 8.f);
    SkFixed sigmaToCircleRRatioFixed;
    static const SkScalar kHalfPlaneThreshold = 0.1f;
    bool useHalfPlaneApprox = false;
    if (sigmaToCircleRRatio <= kHalfPlaneThreshold) {
        useHalfPlaneApprox = true;
        sigmaToCircleRRatioFixed = 0;
        *solidRadius = circleR - 3 * sigma;
        *textureRadius = 6 * sigma;
    } else {
        // Convert to fixed point for the key.
        sigmaToCircleRRatioFixed = SkScalarToFixed(sigmaToCircleRRatio);
        // We shave off some bits to reduce the number of unique entries. We could probably
        // shave off more than we do.
        sigmaToCircleRRatioFixed &= ~0xff;
        sigmaToCircleRRatio = SkFixedToScalar(sigmaToCircleRRatioFixed);
        sigma = circleR * sigmaToCircleRRatio;
        *solidRadius = 0;
        *textureRadius = circleR + 3 * sigma;
    }

    static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain();
    GrUniqueKey key;
    GrUniqueKey::Builder builder(&key, kDomain, 1);
    builder[0] = sigmaToCircleRRatioFixed;
    builder.finish();

    sk_sp<GrTextureProxy> blurProfile =
            proxyProvider->findOrCreateProxyByUniqueKey(key, kTopLeft_GrSurfaceOrigin);
    if (!blurProfile) {
        static constexpr int kProfileTextureWidth = 512;
        GrSurfaceDesc texDesc;
        texDesc.fOrigin = kTopLeft_GrSurfaceOrigin;
        texDesc.fWidth = kProfileTextureWidth;
        texDesc.fHeight = 1;
        texDesc.fConfig = kAlpha_8_GrPixelConfig;

        std::unique_ptr<uint8_t[]> profile(nullptr);
        if (useHalfPlaneApprox) {
            profile.reset(create_half_plane_profile(kProfileTextureWidth));
        } else {
            // Rescale params to the size of the texture we're creating.
            SkScalar scale = kProfileTextureWidth / *textureRadius;
            profile.reset(
                    create_circle_profile(sigma * scale, circleR * scale, kProfileTextureWidth));
        }

        blurProfile =
                proxyProvider->createTextureProxy(texDesc, SkBudgeted::kYes, profile.get(), 0);
        if (!blurProfile) {
            return nullptr;
        }

        SkASSERT(blurProfile->origin() == kTopLeft_GrSurfaceOrigin);
        proxyProvider->assignUniqueKeyToProxy(key, blurProfile.get());
    }

    return blurProfile;
}
                fUnitInvMatrix = *m;
                m = &fUnitInvMatrix;
            }

            SkScalar scale = SkFixedToScalar(SK_Fixed1 >> shift);
            fUnitInvMatrix.postScale(scale, scale);
            
            // now point here instead of fOrigBitmap
            fBitmap = &fMipBitmap;
        }
    }

    fInvMatrix      = m;
    fInvProc        = m->getMapXYProc();
    fInvType        = m->getType();
    fInvSx          = SkScalarToFixed(m->getScaleX());
    fInvKy          = SkScalarToFixed(m->getSkewY());

    fAlphaScale = SkAlpha255To256(paint.getAlpha());

    // pick-up filtering from the paint, but only if the matrix is
    // more complex than identity/translate (i.e. no need to pay the cost
    // of filtering if we're not scaled etc.).
    // note: we explicitly check inv, since m might be scaled due to unitinv
    //       trickery, but we don't want to see that for this test
    fDoFilter = paint.isFilterBitmap() &&
                (inv.getType() > SkMatrix::kTranslate_Mask &&
                 valid_for_filtering(fBitmap->width() | fBitmap->height()));

    fShaderProc32 = NULL;
    fShaderProc16 = NULL;
void GrStencilAndCoverTextContext::TextRun::setText(const char text[], size_t byteLength,
        SkScalar x, SkScalar y) {
    SkASSERT(byteLength == 0 || text != nullptr);

    SkGlyphCache* glyphCache = this->getGlyphCache();
    SkDrawCacheProc glyphCacheProc = fFont.getDrawCacheProc();

    fTotalGlyphCount = fFont.countText(text, byteLength);
    fInstanceData.reset(InstanceData::Alloc(GrPathRendering::kTranslate_PathTransformType,
                                            fTotalGlyphCount));

    const char* stop = text + byteLength;

    // Measure first if needed.
    if (fFont.getTextAlign() != SkPaint::kLeft_Align) {
        SkFixed    stopX = 0;
        SkFixed    stopY = 0;

        const char* textPtr = text;
        while (textPtr < stop) {
            // We don't need x, y here, since all subpixel variants will have the
            // same advance.
            const SkGlyph& glyph = glyphCacheProc(glyphCache, &textPtr, 0, 0);

            stopX += glyph.fAdvanceX;
            stopY += glyph.fAdvanceY;
        }
        SkASSERT(textPtr == stop);

        SkScalar alignX = SkFixedToScalar(stopX) * fTextRatio;
        SkScalar alignY = SkFixedToScalar(stopY) * fTextRatio;

        if (fFont.getTextAlign() == SkPaint::kCenter_Align) {
            alignX = SkScalarHalf(alignX);
            alignY = SkScalarHalf(alignY);
        }

        x -= alignX;
        y -= alignY;
    }

    SkAutoKern autokern;

    SkFixed fixedSizeRatio = SkScalarToFixed(fTextRatio);

    SkFixed fx = SkScalarToFixed(x);
    SkFixed fy = SkScalarToFixed(y);
    FallbackBlobBuilder fallback;
    while (text < stop) {
        const SkGlyph& glyph = glyphCacheProc(glyphCache, &text, 0, 0);
        fx += SkFixedMul(autokern.adjust(glyph), fixedSizeRatio);
        if (glyph.fWidth) {
            this->appendGlyph(glyph, SkPoint::Make(SkFixedToScalar(fx), SkFixedToScalar(fy)),
                              &fallback);
        }

        fx += SkFixedMul(glyph.fAdvanceX, fixedSizeRatio);
        fy += SkFixedMul(glyph.fAdvanceY, fixedSizeRatio);
    }

    fFallbackTextBlob.reset(fallback.buildIfNeeded(&fFallbackGlyphCount));
}
示例#22
0
bool SkBitmapProcState::chooseProcs(const SkMatrix& inv, const SkPaint& paint) {
    SkASSERT(fOrigBitmap.width() && fOrigBitmap.height());

    fBitmap = NULL;
    fInvMatrix = inv;
    fFilterLevel = paint.getFilterLevel();

    // possiblyScaleImage will look to see if it can rescale the image as a
    // preprocess; either by scaling up to the target size, or by selecting
    // a nearby mipmap level.  If it does, it will adjust the working
    // matrix as well as the working bitmap.  It may also adjust the filter
    // quality to avoid re-filtering an already perfectly scaled image.
    if (!this->possiblyScaleImage()) {
        if (!this->lockBaseBitmap()) {
            return false;
        }
    }
    // The above logic should have always assigned fBitmap, but in case it
    // didn't, we check for that now...
    // TODO(dominikg): Ask humper@ if we can just use an SkASSERT(fBitmap)?
    if (NULL == fBitmap) {
        return false;
    }

    // If we are "still" kMedium_FilterLevel, then the request was not fulfilled by possiblyScale,
    // so we downgrade to kLow (so the rest of the sniffing code can assume that)
    if (SkPaint::kMedium_FilterLevel == fFilterLevel) {
        fFilterLevel = SkPaint::kLow_FilterLevel;
    }

    bool trivialMatrix = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0;
    bool clampClamp = SkShader::kClamp_TileMode == fTileModeX &&
                      SkShader::kClamp_TileMode == fTileModeY;

    if (!(fAdjustedMatrix || clampClamp || trivialMatrix)) {
        fInvMatrix.postIDiv(fOrigBitmap.width(), fOrigBitmap.height());
    }

    // Now that all possible changes to the matrix have taken place, check
    // to see if we're really close to a no-scale matrix.  If so, explicitly
    // set it to be so.  Subsequent code may inspect this matrix to choose
    // a faster path in this case.

    // This code will only execute if the matrix has some scale component;
    // if it's already pure translate then we won't do this inversion.

    if (matrix_only_scale_translate(fInvMatrix)) {
        SkMatrix forward;
        if (fInvMatrix.invert(&forward)) {
            if (clampClamp ? just_trans_clamp(forward, *fBitmap)
                            : just_trans_general(forward)) {
                SkScalar tx = -SkScalarRoundToScalar(forward.getTranslateX());
                SkScalar ty = -SkScalarRoundToScalar(forward.getTranslateY());
                fInvMatrix.setTranslate(tx, ty);
            }
        }
    }

    fInvProc        = fInvMatrix.getMapXYProc();
    fInvType        = fInvMatrix.getType();
    fInvSx          = SkScalarToFixed(fInvMatrix.getScaleX());
    fInvSxFractionalInt = SkScalarToFractionalInt(fInvMatrix.getScaleX());
    fInvKy          = SkScalarToFixed(fInvMatrix.getSkewY());
    fInvKyFractionalInt = SkScalarToFractionalInt(fInvMatrix.getSkewY());

    fAlphaScale = SkAlpha255To256(paint.getAlpha());

    fShaderProc32 = NULL;
    fShaderProc16 = NULL;
    fSampleProc32 = NULL;
    fSampleProc16 = NULL;

    // recompute the triviality of the matrix here because we may have
    // changed it!

    trivialMatrix = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0;

    if (SkPaint::kHigh_FilterLevel == fFilterLevel) {
        // If this is still set, that means we wanted HQ sampling
        // but couldn't do it as a preprocess.  Let's try to install
        // the scanline version of the HQ sampler.  If that process fails,
        // downgrade to bilerp.

        // NOTE: Might need to be careful here in the future when we want
        // to have the platform proc have a shot at this; it's possible that
        // the chooseBitmapFilterProc will fail to install a shader but a
        // platform-specific one might succeed, so it might be premature here
        // to fall back to bilerp.  This needs thought.

        if (!this->setBitmapFilterProcs()) {
            fFilterLevel = SkPaint::kLow_FilterLevel;
        }
    }

    if (SkPaint::kLow_FilterLevel == fFilterLevel) {
        // Only try bilerp if the matrix is "interesting" and
        // the image has a suitable size.

        if (fInvType <= SkMatrix::kTranslate_Mask ||
                !valid_for_filtering(fBitmap->width() | fBitmap->height())) {
            fFilterLevel = SkPaint::kNone_FilterLevel;
        }
    }

    // At this point, we know exactly what kind of sampling the per-scanline
    // shader will perform.

    fMatrixProc = this->chooseMatrixProc(trivialMatrix);
    // TODO(dominikg): SkASSERT(fMatrixProc) instead? chooseMatrixProc never returns NULL.
    if (NULL == fMatrixProc) {
        return false;
    }

    ///////////////////////////////////////////////////////////////////////

    const SkAlphaType at = fBitmap->alphaType();

    // No need to do this if we're doing HQ sampling; if filter quality is
    // still set to HQ by the time we get here, then we must have installed
    // the shader procs above and can skip all this.

    if (fFilterLevel < SkPaint::kHigh_FilterLevel) {

        int index = 0;
        if (fAlphaScale < 256) {  // note: this distinction is not used for D16
            index |= 1;
        }
        if (fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) {
            index |= 2;
        }
        if (fFilterLevel > SkPaint::kNone_FilterLevel) {
            index |= 4;
        }
        // bits 3,4,5 encoding the source bitmap format
        switch (fBitmap->colorType()) {
            case kN32_SkColorType:
                if (kPremul_SkAlphaType != at && kOpaque_SkAlphaType != at) {
                    return false;
                }
                index |= 0;
                break;
            case kRGB_565_SkColorType:
                index |= 8;
                break;
            case kIndex_8_SkColorType:
                if (kPremul_SkAlphaType != at && kOpaque_SkAlphaType != at) {
                    return false;
                }
                index |= 16;
                break;
            case kARGB_4444_SkColorType:
                if (kPremul_SkAlphaType != at && kOpaque_SkAlphaType != at) {
                    return false;
                }
                index |= 24;
                break;
            case kAlpha_8_SkColorType:
                index |= 32;
                fPaintPMColor = SkPreMultiplyColor(paint.getColor());
                break;
            default:
                // TODO(dominikg): Should we ever get here? SkASSERT(false) instead?
                return false;
        }

    #if !SK_ARM_NEON_IS_ALWAYS
        static const SampleProc32 gSkBitmapProcStateSample32[] = {
            S32_opaque_D32_nofilter_DXDY,
            S32_alpha_D32_nofilter_DXDY,
            S32_opaque_D32_nofilter_DX,
            S32_alpha_D32_nofilter_DX,
            S32_opaque_D32_filter_DXDY,
            S32_alpha_D32_filter_DXDY,
            S32_opaque_D32_filter_DX,
            S32_alpha_D32_filter_DX,

            S16_opaque_D32_nofilter_DXDY,
            S16_alpha_D32_nofilter_DXDY,
            S16_opaque_D32_nofilter_DX,
            S16_alpha_D32_nofilter_DX,
            S16_opaque_D32_filter_DXDY,
            S16_alpha_D32_filter_DXDY,
            S16_opaque_D32_filter_DX,
            S16_alpha_D32_filter_DX,

            SI8_opaque_D32_nofilter_DXDY,
            SI8_alpha_D32_nofilter_DXDY,
            SI8_opaque_D32_nofilter_DX,
            SI8_alpha_D32_nofilter_DX,
            SI8_opaque_D32_filter_DXDY,
            SI8_alpha_D32_filter_DXDY,
            SI8_opaque_D32_filter_DX,
            SI8_alpha_D32_filter_DX,

            S4444_opaque_D32_nofilter_DXDY,
            S4444_alpha_D32_nofilter_DXDY,
            S4444_opaque_D32_nofilter_DX,
            S4444_alpha_D32_nofilter_DX,
            S4444_opaque_D32_filter_DXDY,
            S4444_alpha_D32_filter_DXDY,
            S4444_opaque_D32_filter_DX,
            S4444_alpha_D32_filter_DX,

            // A8 treats alpha/opaque the same (equally efficient)
            SA8_alpha_D32_nofilter_DXDY,
            SA8_alpha_D32_nofilter_DXDY,
            SA8_alpha_D32_nofilter_DX,
            SA8_alpha_D32_nofilter_DX,
            SA8_alpha_D32_filter_DXDY,
            SA8_alpha_D32_filter_DXDY,
            SA8_alpha_D32_filter_DX,
            SA8_alpha_D32_filter_DX
        };

        static const SampleProc16 gSkBitmapProcStateSample16[] = {
            S32_D16_nofilter_DXDY,
            S32_D16_nofilter_DX,
            S32_D16_filter_DXDY,
            S32_D16_filter_DX,

            S16_D16_nofilter_DXDY,
            S16_D16_nofilter_DX,
            S16_D16_filter_DXDY,
            S16_D16_filter_DX,

            SI8_D16_nofilter_DXDY,
            SI8_D16_nofilter_DX,
            SI8_D16_filter_DXDY,
            SI8_D16_filter_DX,

            // Don't support 4444 -> 565
            NULL, NULL, NULL, NULL,
            // Don't support A8 -> 565
            NULL, NULL, NULL, NULL
        };
    #endif

        fSampleProc32 = SK_ARM_NEON_WRAP(gSkBitmapProcStateSample32)[index];
        index >>= 1;    // shift away any opaque/alpha distinction
        fSampleProc16 = SK_ARM_NEON_WRAP(gSkBitmapProcStateSample16)[index];

        // our special-case shaderprocs
        if (SK_ARM_NEON_WRAP(S16_D16_filter_DX) == fSampleProc16) {
            if (clampClamp) {
                fShaderProc16 = SK_ARM_NEON_WRAP(Clamp_S16_D16_filter_DX_shaderproc);
            } else if (SkShader::kRepeat_TileMode == fTileModeX &&
                       SkShader::kRepeat_TileMode == fTileModeY) {
                fShaderProc16 = SK_ARM_NEON_WRAP(Repeat_S16_D16_filter_DX_shaderproc);
            }
        } else if (SK_ARM_NEON_WRAP(SI8_opaque_D32_filter_DX) == fSampleProc32 && clampClamp) {
            fShaderProc32 = SK_ARM_NEON_WRAP(Clamp_SI8_opaque_D32_filter_DX_shaderproc);
        }

        if (NULL == fShaderProc32) {
            fShaderProc32 = this->chooseShaderProc32();
        }
    }
示例#23
0
SkScalerContext_FreeType::SkScalerContext_FreeType(const SkDescriptor* desc)
        : SkScalerContext(desc) {
    SkAutoMutexAcquire  ac(gFTMutex);

    if (gFTCount == 0) {
        if (!InitFreetype()) {
            sk_throw();
        }
    }
    ++gFTCount;

    // load the font file
    fFTSize = NULL;
    fFace = NULL;
    fFaceRec = ref_ft_face(fRec.fFontID);
    if (NULL == fFaceRec) {
        return;
    }
    fFace = fFaceRec->fFace;

    // compute our factors from the record

    SkMatrix    m;

    fRec.getSingleMatrix(&m);

#ifdef DUMP_STRIKE_CREATION
    SkString     keyString;
    SkFontHost::GetDescriptorKeyString(desc, &keyString);
    printf("========== strike [%g %g %g] [%g %g %g %g] hints %d format %d %s\n", SkScalarToFloat(fRec.fTextSize),
           SkScalarToFloat(fRec.fPreScaleX), SkScalarToFloat(fRec.fPreSkewX),
           SkScalarToFloat(fRec.fPost2x2[0][0]), SkScalarToFloat(fRec.fPost2x2[0][1]),
           SkScalarToFloat(fRec.fPost2x2[1][0]), SkScalarToFloat(fRec.fPost2x2[1][1]),
           fRec.getHinting(), fRec.fMaskFormat, keyString.c_str());
#endif

    //  now compute our scale factors
    SkScalar    sx = m.getScaleX();
    SkScalar    sy = m.getScaleY();

    if (m.getSkewX() || m.getSkewY() || sx < 0 || sy < 0) {
        // sort of give up on hinting
        sx = SkMaxScalar(SkScalarAbs(sx), SkScalarAbs(m.getSkewX()));
        sy = SkMaxScalar(SkScalarAbs(m.getSkewY()), SkScalarAbs(sy));
        sx = sy = SkScalarAve(sx, sy);

        SkScalar inv = SkScalarInvert(sx);

        // flip the skew elements to go from our Y-down system to FreeType's
        fMatrix22.xx = SkScalarToFixed(SkScalarMul(m.getScaleX(), inv));
        fMatrix22.xy = -SkScalarToFixed(SkScalarMul(m.getSkewX(), inv));
        fMatrix22.yx = -SkScalarToFixed(SkScalarMul(m.getSkewY(), inv));
        fMatrix22.yy = SkScalarToFixed(SkScalarMul(m.getScaleY(), inv));
    } else {
        fMatrix22.xx = fMatrix22.yy = SK_Fixed1;
        fMatrix22.xy = fMatrix22.yx = 0;
    }

    fScaleX = SkScalarToFixed(sx);
    fScaleY = SkScalarToFixed(sy);

    // compute the flags we send to Load_Glyph
    {
        FT_Int32 loadFlags = FT_LOAD_DEFAULT;

        if (SkMask::kBW_Format == fRec.fMaskFormat) {
            // See http://code.google.com/p/chromium/issues/detail?id=43252#c24
            loadFlags = FT_LOAD_TARGET_MONO;
            if (fRec.getHinting() == SkPaint::kNo_Hinting)
                loadFlags = FT_LOAD_NO_HINTING;
        } else {
            switch (fRec.getHinting()) {
            case SkPaint::kNo_Hinting:
                loadFlags = FT_LOAD_NO_HINTING;
                break;
            case SkPaint::kSlight_Hinting:
                loadFlags = FT_LOAD_TARGET_LIGHT;  // This implies FORCE_AUTOHINT
                break;
            case SkPaint::kNormal_Hinting:
                loadFlags = FT_LOAD_TARGET_NORMAL;
                break;
            case SkPaint::kFull_Hinting:
                loadFlags = FT_LOAD_TARGET_NORMAL;
                if (SkMask::kHorizontalLCD_Format == fRec.fMaskFormat)
                    loadFlags = FT_LOAD_TARGET_LCD;
                else if (SkMask::kVerticalLCD_Format == fRec.fMaskFormat)
                    loadFlags = FT_LOAD_TARGET_LCD_V;
                break;
            default:
                SkDebugf("---------- UNKNOWN hinting %d\n", fRec.getHinting());
                break;
            }
        }

        if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0)
            loadFlags |= FT_LOAD_NO_BITMAP;

        fLoadGlyphFlags = loadFlags;
    }

    // now create the FT_Size

    {
        FT_Error    err;

        err = FT_New_Size(fFace, &fFTSize);
        if (err != 0) {
            SkDEBUGF(("SkScalerContext_FreeType::FT_New_Size(%x): FT_Set_Char_Size(0x%x, 0x%x) returned 0x%x\n",
                        fFaceRec->fFontID, fScaleX, fScaleY, err));
            fFace = NULL;
            return;
        }

        err = FT_Activate_Size(fFTSize);
        if (err != 0) {
            SkDEBUGF(("SkScalerContext_FreeType::FT_Activate_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
                        fFaceRec->fFontID, fScaleX, fScaleY, err));
            fFTSize = NULL;
        }

        err = FT_Set_Char_Size( fFace,
                                SkFixedToFDot6(fScaleX), SkFixedToFDot6(fScaleY),
                                72, 72);
        if (err != 0) {
            SkDEBUGF(("SkScalerContext_FreeType::FT_Set_Char_Size(%x, 0x%x, 0x%x) returned 0x%x\n",
                        fFaceRec->fFontID, fScaleX, fScaleY, err));
            fFace = NULL;
            return;
        }

        FT_Set_Transform( fFace, &fMatrix22, NULL);
    }
}