C++ (Cpp) scale_dist_14 Examples

Example #1

File: SkAvoidXfermode.cpp Project: ACSOP/android_external_skia

void SkAvoidXfermode::xfer4444(uint16_t dst[], const SkPMColor src[], int count,
                               const SkAlpha aa[])
{
    unsigned    opR = SkColorGetR(fOpColor) >> 4;
    unsigned    opG = SkColorGetG(fOpColor) >> 4;
    unsigned    opB = SkColorGetB(fOpColor) >> 4;
    uint32_t    mul = fDistMul;
    uint32_t    sub = (fDistMul - (1 << 14)) << 4;

    int MAX, mask;

    if (kTargetColor_Mode == fMode) {
        mask = -1;
        MAX = 15;
    } else {
        mask = 0;
        MAX = 0;
    }

    for (int i = 0; i < count; i++) {
        int d = color_dist4444(dst[i], opR, opG, opB);
        // now reverse d if we need to
        d = MAX + (d ^ mask) - mask;
        SkASSERT((unsigned)d <= 15);
        // convert from 0..15 to 0..16
        d += d >> 3;
        d = scale_dist_14(d, mul, sub);
        SkASSERT(d <= 16);

        if (d > 0) {
            if (NULL != aa) {
                d = SkAlphaMul(d, Accurate255To256(*aa++));
                if (0 == d) {
                    continue;
                }
            }
            dst[i] = SkBlend4444(SkPixel32ToPixel4444(src[i]), dst[i], d);
        }
    }
}

Example #2

File: SkAvoidXfermode.cpp Project: ACSOP/android_external_skia

void SkAvoidXfermode::xfer32(SkPMColor dst[], const SkPMColor src[], int count,
                             const SkAlpha aa[])
{
    unsigned    opR = SkColorGetR(fOpColor);
    unsigned    opG = SkColorGetG(fOpColor);
    unsigned    opB = SkColorGetB(fOpColor);
    uint32_t    mul = fDistMul;
    uint32_t    sub = (fDistMul - (1 << 14)) << 8;

    int MAX, mask;

    if (kTargetColor_Mode == fMode) {
        mask = -1;
        MAX = 255;
    } else {
        mask = 0;
        MAX = 0;
    }

    for (int i = 0; i < count; i++) {
        int d = color_dist32(dst[i], opR, opG, opB);
        // now reverse d if we need to
        d = MAX + (d ^ mask) - mask;
        SkASSERT((unsigned)d <= 255);
        d = Accurate255To256(d);

        d = scale_dist_14(d, mul, sub);
        SkASSERT(d <= 256);

        if (d > 0) {
            if (NULL != aa) {
                d = SkAlphaMul(d, Accurate255To256(*aa++));
                if (0 == d) {
                    continue;
                }
            }
            dst[i] = SkFourByteInterp(src[i], dst[i], d);
        }
    }
}

Example #3

File: SkAvoidXfermode.cpp Project: mokacao/skia

void SkAvoidXfermode::xfer16(uint16_t dst[], const SkPMColor src[], int count,
                             const SkAlpha aa[]) const {
    unsigned    opR = SkColorGetR(fOpColor) >> (8 - SK_R16_BITS);
    unsigned    opG = SkColorGetG(fOpColor) >> (8 - SK_G16_BITS);
    unsigned    opB = SkColorGetB(fOpColor) >> (8 - SK_R16_BITS);
    uint32_t    mul = fDistMul;
    uint32_t    sub = (fDistMul - (1 << 14)) << SK_R16_BITS;

    int MAX, mask;

    if (kTargetColor_Mode == fMode) {
        mask = -1;
        MAX = 31;
    } else {
        mask = 0;
        MAX = 0;
    }

    for (int i = 0; i < count; i++) {
        int d = color_dist16(dst[i], opR, opG, opB);
        // now reverse d if we need to
        d = MAX + (d ^ mask) - mask;
        SkASSERT((unsigned)d <= 31);
        // convert from 0..31 to 0..32
        d += d >> 4;
        d = scale_dist_14(d, mul, sub);
        SkASSERT(d <= 32);

        if (d > 0) {
            if (aa) {
                d = SkAlphaMul(d, Accurate255To256(*aa++));
                if (0 == d) {
                    continue;
                }
            }
            dst[i] = SkBlend3216(src[i], dst[i], d);
        }
    }
}