/*
 * Copyright 2005-2007, Haiku.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Stephan Aßmus <superstippi@gmx.de>
 */
#ifndef DRAWING_SUPPORT_H
#define DRAWING_SUPPORT_H


#include <SupportDefs.h>
#include <string.h>

class BRect;


// gfxset32
// * numBytes is expected to be a multiple of 4
static inline void
gfxset32(uint8* dst, uint32 color, int32 numBytes)
{
        uint64 s64 = ((uint64)color << 32) | color;
        while (numBytes >= 8) {
                *(uint64*)dst = s64;
                numBytes -= 8;
                dst += 8;
        }
        if (numBytes == 4) {
                *(uint32*)dst = color;
        }
}

union pixel32 {
        uint32  data32;
        uint8   data8[4];
};

// blend_line32
static inline void
blend_line32(uint8* buffer, int32 pixels, uint8 r, uint8 g, uint8 b, uint8 a)
{
        pixel32 p;

        r = (r * a) >> 8;
        g = (g * a) >> 8;
        b = (b * a) >> 8;
        a = 255 - a;

        uint8 tempBuffer[pixels * 4];

        uint8* t = tempBuffer;
        uint8* s = buffer;

        for (int32 i = 0; i < pixels; i++) {
                p.data32 = *(uint32*)s;

                t[0] = ((p.data8[0] * a) >> 8) + b;
                t[1] = ((p.data8[1] * a) >> 8) + g;
                t[2] = ((p.data8[2] * a) >> 8) + r;

                t += 4;
                s += 4;
        }

        memcpy(buffer, tempBuffer, pixels * 4);
}

void align_rect_to_pixels(BRect* rect);

#endif  // DRAWING_SUPPORT_H