Exemplo n.º 1
0
// blit an RGBA img, blending matte colour with src alpha onto the dest
void BlitMatteRGBA8(
    Img const& srcimg, Box const& srcbox,
    Img& destimg, Box& destbox,
    PenColour const& matte )
{
    assert(srcimg.Fmt()==FMT_RGBA8);

    Box destclipped( destbox );
    Box srcclipped( srcbox );
    clip_blit( srcimg.Bounds(), srcclipped, destimg.Bounds(), destclipped );

    const int w = destclipped.w;
    int y;
    for( y=0; y<destclipped.h; ++y )
    {
        RGBA8 const* src = srcimg.PtrConst_RGBA8( srcclipped.x+0, srcclipped.y+y );
        switch(destimg.Fmt())
        {
            case FMT_I8:
                scan_matte_RGBA8_I8(src, destimg.Ptr_I8(destclipped.x+0,destclipped.y+y), w, matte.idx());
                break;
            case FMT_RGBX8:
                scan_matte_RGBA8_RGBX8(src, destimg.Ptr_RGBX8(destclipped.x+0,destclipped.y+y), w, matte.rgb());
                break;
            case FMT_RGBA8:
                scan_matte_RGBA8_RGBA8(src, destimg.Ptr_RGBA8(destclipped.x+0,destclipped.y+y), w, matte.rgb());
                break;
            default:
                assert(false);
                break;
        }
    }
    destbox = destclipped;
}
Exemplo n.º 2
0
// blit an RGBA img, blending with src alpha onto the dest (must be RGBX8 or RGBA8)
void BlitRGBA8( Img const& srcimg, Box const& srcbox, Img& destimg, Box& destbox )
{
    assert(srcimg.Fmt()==FMT_RGBA8);
    assert(destimg.Fmt()!=FMT_I8);

    Box destclipped( destbox );
    Box srcclipped( srcbox );
    clip_blit( srcimg.Bounds(), srcclipped, destimg.Bounds(), destclipped );

    const int w = destclipped.w;
    int y;
    for( y=0; y<destclipped.h; ++y )
    {
        RGBA8 const* src = srcimg.PtrConst_RGBA8( srcclipped.x+0, srcclipped.y+y );
        switch(destimg.Fmt())
        {
            case FMT_I8:
                assert(false);  // not implemented
                break;
            case FMT_RGBX8:
                scan_RGBA8_RGBX8(src, destimg.Ptr_RGBX8(destclipped.x+0,destclipped.y+y), w);
                break;
            case FMT_RGBA8:
                scan_RGBA8_RGBA8(src, destimg.Ptr_RGBA8(destclipped.x+0,destclipped.y+y), w);
                break;
            default:
                assert(false);
                break;
        }
    }
    destbox = destclipped;
}
Exemplo n.º 3
0
// TODO: src,dest names meaningless. Should be a,b or something neutral
void BlitSwap(
    Img& srcimg, Box const& srcbox,
    Img& destimg, Box& destbox)
{
    assert( srcimg.Fmt() == destimg.Fmt());

    Box destclipped( destbox );
    Box srcclipped( srcbox );
    clip_blit( srcimg.Bounds(), srcclipped, destimg.Bounds(), destclipped );


    int y;
    for( y=0; y<destclipped.h; ++y )
    {
        switch(srcimg.Fmt())
        {
        case FMT_I8:
            {
                I8* src = srcimg.Ptr_I8( srcclipped.x+0, srcclipped.y+y );
                I8* dest = destimg.Ptr_I8( destclipped.x+0, destclipped.y+y );
                std::swap_ranges( src,src+destclipped.w, dest);
            }
            break;
        case FMT_RGBX8:
            {
                RGBX8* src = srcimg.Ptr_RGBX8( srcclipped.x+0, srcclipped.y+y );
                RGBX8* dest = destimg.Ptr_RGBX8( destclipped.x+0, destclipped.y+y );
                std::swap_ranges( src,src+destclipped.w, dest);
            }
            break;
        case FMT_RGBA8:
            {
                RGBA8* src = srcimg.Ptr_RGBA8( srcclipped.x+0, srcclipped.y+y );
                RGBA8* dest = destimg.Ptr_RGBA8( destclipped.x+0, destclipped.y+y );
                std::swap_ranges( src,src+destclipped.w, dest);
            }
            break;
        default:
            assert(false);
            break;
        }
    }

    destbox = destclipped;
}
Exemplo n.º 4
0
// blit from an I8 source to any target, with colourkey transparency
void BlitI8Keyed(
    Img const& srcimg, Box const& srcbox,
    Palette const& srcpalette,
    Img& destimg, Box& destbox,
    int transparentIdx )
{
    assert(srcimg.Fmt()==FMT_I8);

    Box destclipped( destbox );
    Box srcclipped( srcbox );
    clip_blit( srcimg.Bounds(), srcclipped, destimg.Bounds(), destclipped );

    const int w = destclipped.w;

    int y;
    for( y=0; y<destclipped.h; ++y )
    {
        I8 const* src = srcimg.PtrConst_I8( srcclipped.x+0, srcclipped.y+y );
        switch(destimg.Fmt())
        {
        case FMT_I8:
            scan_I8_I8_keyed(src, destimg.Ptr_I8(destclipped.x+0,destclipped.y+y), w, transparentIdx);
            break;
        case FMT_RGBX8:
            scan_I8_RGBX8_keyed(src, srcpalette, destimg.Ptr_RGBX8(destclipped.x+0,destclipped.y+y), w, transparentIdx);
            break;
        case FMT_RGBA8:
            scan_I8_RGBA8_keyed(src, srcpalette, destimg.Ptr_RGBA8(destclipped.x+0,destclipped.y+y), w, transparentIdx);
            break;
        default:
            assert(false);
            break;
        }
    }

    destbox = destclipped;
}