//--------------------------------------------------------------------
void generate(color_type* span, int x, int y, int len)
{
if(y < 1 || y >= int(m_source_image->height() - 1))
{
do
{
*span++ = rgba8(0,0,0,0);
}
while(--len);
return;
}
do
{
int color[4];
color[0] = color[1] = color[2] = color[3] = 0;
if(x > 0 && x < int(m_source_image->width()-1))
{
int i = 3;
do
{
const int8u* ptr = m_source_image->row_ptr(y - i + 2) + (x - 1) * 3;
color[0] += *ptr++;
color[1] += *ptr++;
color[2] += *ptr++;
color[3] += 255;
color[0] += *ptr++;
color[1] += *ptr++;
color[2] += *ptr++;
color[3] += 255;
color[0] += *ptr++;
color[1] += *ptr++;
color[2] += *ptr++;
color[3] += 255;
}
while(--i);
color[0] /= 9;
color[1] /= 9;
color[2] /= 9;
color[3] /= 9;
}
*span++ = rgba8(color[Order::R], color[Order::G], color[Order::B], color[3]);
++x;
}
while(--len);
}
void Pixmap::checkers(const rgba8& color) {
//const int D = min(height(), width()) / 16;
int mask;
rgba8 colorMasked = rgba8(color.x ^ 255, color.y ^ 255, color.z ^ 255, color.w);
for (int x = 0; x < width(); x++) {
for (int y = 0; y < height(); y++) {
mask = ((x & 16) == 0) ^ ((y & 16) == 0);
if(mask)
putPixel(x, y, colorMasked);
else
putPixel(x, y, color);
}
}
}
//--------------------------------------------------------------------
template<class Scanline> void render(const Scanline& sl)
{
int y = sl.y();
unsigned num_spans = sl.num_spans();
typename Scanline::const_iterator span = sl.begin();
do
{
int x = span->x;
const typename Scanline::cover_type* covers = span->covers;
int num_pix = span->len;
do
{
int a = (*covers++ * m_color.a) >> 8;
m_ren.color(rgba8(m_color.r, m_color.g, m_color.b, a));
m_square.draw(m_ras, m_sl, m_ren, x, y);
++x;
}
while(--num_pix);
}
while(--num_spans);
}
