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#include "qdrawhelper_arm_simd_p.h"

#include <private/qpaintengine_raster_p.h>
#include <private/qblendfunctions_p.h>

#ifdef QT_HAVE_ARM_SIMD



// TODO: add GNU assembler instructions and support for other platforms.
//       Default to C code for now

void qt_blend_argb32_on_argb32_arm_simd(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) {
            for (int x=0; 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) {
            for (int x=0; x<w; ++x) {
                uint s = BYTE_MUL(src[x], const_alpha);
                dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s));
            }
            dst = (quint32 *)(((uchar *) dst) + dbpl);
            src = (const quint32 *)(((const uchar *) src) + sbpl);
        }
    }
}

void qt_blend_rgb32_on_rgb32_arm_simd(uchar *destPixels, int dbpl,
                             const uchar *srcPixels, int sbpl,
                             int w, int h,
                             int const_alpha)
{
    if (const_alpha != 256) {
        qt_blend_argb32_on_argb32_arm_simd(destPixels, dbpl, srcPixels, sbpl, w, h, const_alpha);
        return;
    }

    const uint *src = (const uint *) srcPixels;
    uint *dst = (uint *) destPixels;
    if (w <= 64) {
        for (int y=0; y<h; ++y) {
            qt_memconvert(dst, src, w);
            dst = (quint32 *)(((uchar *) dst) + dbpl);
            src = (const quint32 *)(((const uchar *) src) + sbpl);
        }
    } else {
        int len = w * 4;
        for (int y=0; y<h; ++y) {
            memcpy(dst, src, len);
            dst = (quint32 *)(((uchar *) dst) + dbpl);
            src = (const quint32 *)(((const uchar *) src) + sbpl);
        }
    }
}


#endif // QT_HAVE_ARMV_SIMD