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#include <private/qdrawhelper_p.h>

#ifdef QT_HAVE_NEON

#include <private/qdrawhelper_neon_p.h>

#include <arm_neon.h>

QT_BEGIN_NAMESPACE

{

    // result = (x + (x >> 8) + 0x80) >> 8

}

{

    // t = qRound(x * alpha / 255.0)

}

{

    // t = x * a + y * b

}

{

}

void qt_blend_argb32_on_argb32_neon(uchar *destPixels, int dbpl,

                                    const uchar *srcPixels, int sbpl,

                                    int w, int h,

                                    int const_alpha)

{

    const uint *src = (const uint *) srcPixels;

    uint *dst = (uint *) destPixels;

    if (const_alpha == 256) {

        for (int y = 0; y < h; ++y) {

            int x = 0;

            for (; x < w-3; x += 4) {

                if ((src[x] & src[x+1] & src[x+2] & src[x+3]) >= 0xff000000) {

                    // all opaque

                } else if (src[x] | src[x+1] | src[x+2] | src[x+3]) {

                    const uint8x8_t src8_low = vget_low_u8(src8);

                    const uint8x8_t dst8_low = vget_low_u8(dst8);

                    const uint8x8_t src8_high = vget_high_u8(src8);

                    const uint8x8_t dst8_high = vget_high_u8(dst8);

                }

            }

            for (; x<w; ++x) {

                uint s = src[x];

                if (s >= 0xff000000)

                    dst[x] = s;

                else if (s != 0)

                    dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s));

            }

            dst = (quint32 *)(((uchar *) dst) + dbpl);

            src = (const quint32 *)(((const uchar *) src) + sbpl);

        }

    } else if (const_alpha != 0) {

        const_alpha = (const_alpha * 255) >> 8;

        for (int y = 0; y < h; ++y) {

            int x = 0;

            for (; x < w-3; x += 4) {

                if (src[x] | src[x+1] | src[x+2] | src[x+3]) {

                    const uint8x8_t src8_low = vget_low_u8(src8);

                    const uint8x8_t dst8_low = vget_low_u8(dst8);

                    const uint8x8_t src8_high = vget_high_u8(src8);

                    const uint8x8_t dst8_high = vget_high_u8(dst8);

                }

            }

            for (; x<w; ++x) {

                uint s = src[x];

                if (s != 0) {

                    s = BYTE_MUL(s, const_alpha);

                    dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s));

                }

            }

            dst = (quint32 *)(((uchar *) dst) + dbpl);

            src = (const quint32 *)(((const uchar *) src) + sbpl);

        }

    }

}

// qblendfunctions.cpp

void qt_blend_rgb32_on_rgb32(uchar *destPixels, int dbpl,

                             const uchar *srcPixels, int sbpl,

                             int w, int h,

                             int const_alpha);

void qt_blend_rgb32_on_rgb32_neon(uchar *destPixels, int dbpl,

                                  const uchar *srcPixels, int sbpl,

                                  int w, int h,

                                  int const_alpha)

{

    if (const_alpha != 256) {

        if (const_alpha != 0) {

            const uint *src = (const uint *) srcPixels;

            uint *dst = (uint *) destPixels;

            const_alpha = (const_alpha * 255) >> 8;

            int one_minus_const_alpha = 255 - const_alpha;

            for (int y = 0; y < h; ++y) {

                int x = 0;

                for (; x < w-3; x += 4) {

                    const uint8x8_t src8_low = vget_low_u8(src8);

                    const uint8x8_t dst8_low = vget_low_u8(dst8);

                    const uint8x8_t src8_high = vget_high_u8(src8);

                    const uint8x8_t dst8_high = vget_high_u8(dst8);

                }

                for (; x<w; ++x) {

                    uint s = src[x];

                    s = BYTE_MUL(s, const_alpha);

                    dst[x] = INTERPOLATE_PIXEL_255(src[x], const_alpha, dst[x], one_minus_const_alpha);

                }

                dst = (quint32 *)(((uchar *) dst) + dbpl);

                src = (const quint32 *)(((const uchar *) src) + sbpl);

            }

        }

    } else {

        qt_blend_rgb32_on_rgb32(destPixels, dbpl, srcPixels, sbpl, w, h, const_alpha);

    }

}

QT_END_NAMESPACE

#endif // QT_HAVE_NEON