C++ (Cpp) SkPixel32ToPixel4444 Examples

Example #1

File: SkXfermode.cpp Project: Dieken/SurfaceFlinger

void SkProcXfermode::xfer4444(SK_RESTRICT SkPMColor16 dst[],
                              const SK_RESTRICT SkPMColor src[], int count,
                              const SK_RESTRICT SkAlpha aa[]) {
    SkASSERT(dst && src && count >= 0);
    
    SkXfermodeProc proc = fProc;

    if (NULL != proc) {
        if (NULL == aa) {
            for (int i = count - 1; i >= 0; --i) {
                SkPMColor dstC = SkPixel4444ToPixel32(dst[i]);
                dst[i] = SkPixel32ToPixel4444(proc(src[i], dstC));
            }
        } else {
            for (int i = count - 1; i >= 0; --i) {
                unsigned a = aa[i];
                if (0 != a) {
                    SkPMColor dstC = SkPixel4444ToPixel32(dst[i]);
                    SkPMColor C = proc(src[i], dstC);
                    if (0xFF != a) {
                        C = SkFourByteInterp(C, dstC, a);
                    }
                    dst[i] = SkPixel32ToPixel4444(C);
                }
            }
        }
    }
}

Example #2

File: SkBlitter_4444.cpp Project: ACSOP/android_external_skia

SkARGB4444_Blitter::SkARGB4444_Blitter(const SkBitmap& device,
                                   const SkPaint& paint) : INHERITED(device) {
    // cache premultiplied versions in 4444
    SkPMColor c = SkPreMultiplyColor(paint.getColor());
    fPMColor16 = SkPixel32ToPixel4444(c);
    if (paint.isDither()) {
        fPMColor16Other = SkDitherPixel32To4444(c);
    } else {
        fPMColor16Other = fPMColor16;
    }

    // cache raw versions in 4444
    fRawColor16 = SkPackARGB4444(0xFF >> 4, SkColorGetR(c) >> 4,
                                 SkColorGetG(c) >> 4, SkColorGetB(c) >> 4);
    if (paint.isDither()) {
        fRawColor16Other = SkDitherARGB32To4444(0xFF, SkColorGetR(c),
                                                SkColorGetG(c), SkColorGetB(c));
    } else {
        fRawColor16Other = fRawColor16;
    }

    fScale16 = SkAlpha15To16(SkGetPackedA4444(fPMColor16Other));
    if (16 == fScale16) {
        // force the original to also be opaque
        fPMColor16 |= (0xF << SK_A4444_SHIFT);
    }
}

Example #3

SkARGB4444_Blitter::SkARGB4444_Blitter(const SkBitmap& device, const SkPaint& paint)
    : INHERITED(device)
{
    // cache premultiplied versions in 4444
    SkPMColor c = SkPreMultiplyColor(paint.getColor());
    fPMColor16 = SkPixel32ToPixel4444(c);
    if (paint.isDither()) {
        fPMColor16Other = SkDitherPixel32To4444(c);
    } else {
        fPMColor16Other = fPMColor16;
    }

    // cache raw versions in 4444
    fRawColor16 = SkPackARGB4444(0xFF >> 4, SkColorGetR(c) >> 4,
                                 SkColorGetG(c) >> 4, SkColorGetB(c) >> 4);
    if (paint.isDither()) {
        fRawColor16Other = SkDitherARGB32To4444(0xFF, SkColorGetR(c),
                                                SkColorGetG(c), SkColorGetB(c));
    } else {
        fRawColor16Other = fRawColor16;
    }
    
#if 0 /// don't think this assertion is true, but need it be?

    // our dithered color will be the same or more opaque than the original
    // so use dithered to compute our scale
    SkASSERT(SkGetPackedA4444(fPMColor16Other) >= SkGetPackedA4444(fPMColor16));
#endif

    fScale16 = SkAlpha15To16(SkGetPackedA4444(fPMColor16Other));
    if (16 == fScale16) {
        // force the original to also be opaque
        fPMColor16 |= (0xF << SK_A4444_SHIFT);
    }
}

Example #4

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 #5

File: SkPDFImage.cpp Project: Igalia/skia

static uint16_t remove_alpha_argb4444(uint16_t pmColor) {
    return SkPixel32ToPixel4444(
            remove_alpha_argb8888(SkPixel4444ToPixel32(pmColor)));
}