void BitmapUtilsT<PFsrc,PFdst>::OpacityBlit(uint8_t* dst_pixels, const uint8_t* src_pixels, int n, int opacity) {
for (int i = 0; i < n; i++) {
blend_pixel(dst_pixels, src_pixels, opacity);
src_pixels += pf_src.bytes;
dst_pixels += pf_dst.bytes;
}
}
void BitmapUtilsT<PFsrc,PFdst>::OpacityScaleBlit(uint8_t* dst_pixels, const uint8_t* src_pixels, int n, int x, int step, int opacity) {
for (int i = 0; i < n; i++) {
const uint8_t* p = src_pixels + (x >> FRAC_BITS) * pf_src.bytes;
blend_pixel(dst_pixels, p, opacity);
dst_pixels += pf_dst.bytes;
x += step;
}
}
//--------------------------------------------------------------------
// The scanline rendering function itself.
template<class Scanline> void render(const Scanline& sl)
{
unsigned num_spans = sl.num_spans();
int y = sl.y();
Scanline::const_iterator span = sl.begin();
do
{
int len = span->len;
int x;
if(len > 0)
{
// pixel-by-pixel
const Scanline::cover_type* covers = span->covers;
x = span->x;
do
{
blend_pixel(x++, y, *covers++);
}
while(--len);
}
else
{
if(*span->covers == 255)
{
// solid span. happens often
draw_solid_span(span->x, y, -len);
}
else
{
// pixel-by-pixel again
x = span->x;
do
{
blend_pixel(x++, y, *span->covers);
}
while(++len);
}
}
++span;
}
while(--num_spans);
}
void image_base::composite(int xoffset, int yoffset, boost::shared_ptr<image_operations> img)
{
std::vector<image_operation>::size_type i = img->operations.size();
align(xoffset, yoffset, img->maxx, img->maxy);
while (i--) {
image_operation op = img->operations[i];
blend_pixel(xoffset + op.x, yoffset + op.y, op.c);
}
}
void image_base::composite(int x, int y, image_operations_ptr opers)
{
std::vector<image_operation>::size_type i = opers->operations.size();
align(x, y, opers->max_x, opers->max_y);
while (i--)
{
image_operation op = opers->operations[i];
blend_pixel(x + op.x, y + op.y, op.c);
}
}
void BitmapUtilsT<PFsrc,PFdst>::OpacityTransformBlit(uint8_t* dst_pixels, const uint8_t* src_pixels, int src_pitch,
int x0, int x1, int y, const Rect& src_rect, const Matrix& inv,
int opacity) {
const int sx0 = src_rect.x;
const int sy0 = src_rect.y;
const int sx1 = src_rect.x + src_rect.width;
const int sy1 = src_rect.y + src_rect.height;
for (int x = x0; x < x1; x++) {
double fx, fy;
inv.Transform(x + 0.5, y + 0.5, fx, fy);
int xi = (int) floor(fx);
int yi = (int) floor(fy);
if (xi < sx0 || xi >= sx1 || yi < sy0 || yi >= sy1)
;
else
blend_pixel(dst_pixels, &src_pixels[yi * src_pitch + xi * pf_src.bytes], opacity);
dst_pixels += pf_dst.bytes;
}
}
void image_base::safe_blend_pixel(pos_t x, pos_t y, color &c)
{
if (x >= w) return;
if (y >= h) return;
blend_pixel(x, y, c);
}