示例#1
0
// Draw a black frame around the rendering buffer, assuming it has 
// RGB-structure, one byte per color component
//--------------------------------------------------
void draw_black_frame(agg::rendering_buffer& rbuf)
{
	unsigned i;
	for(i = 0; i < rbuf.height(); ++i)
	{
		unsigned char* p = rbuf.row_ptr(i);
		*p++ = 0; *p++ = 0; *p++ = 0; *p++=0; // 3 black in header
		p += (rbuf.width() - 2) * sizeof(pixfmt);
		*p++ = 0; *p++ = 0; *p++ = 0; *p++=0; // 3 black in tail
	}
	memset(rbuf.row_ptr(0), 0, rbuf.width() * sizeof(pixfmt));
	memset(rbuf.row_ptr(rbuf.height() - 1), 0, rbuf.width() * sizeof(pixfmt));
}
示例#2
0
bool write_ppm(const agg::rendering_buffer& buffer,
               const char* file_name)
{
  FILE* fd=fopen(file_name, "wb");

  if (fd) {
    fprintf(fd,"P6 %d %d 255\n", buffer.width(),buffer.height());

    for (size_t y=0; y<buffer.height();y++)
    {
      const unsigned char* row=buffer.row_ptr(y);

      fwrite(row,1,buffer.width()*3,fd);
    }

    fclose(fd);
    return true;
  }

  return false;
}
示例#3
0
文件: main.cpp 项目: franko/agg-intro
bool save_image_file (agg::rendering_buffer& rbuf, const char *fn)
{
  FILE* fd = fopen(fn, "wb");
  if(fd == 0) return false;
            
  unsigned w = rbuf.width();
  unsigned h = rbuf.height();
            
  fprintf(fd, "P6\n%d %d\n255\n", w, h);
                
  unsigned y; 
  agg::pod_array<unsigned char> row_buf(w * 3);
  unsigned char *tmp_buf = row_buf.data();

  for(y = 0; y < rbuf.height(); y++)
    {
      const unsigned char* src = rbuf.row_ptr(app_flip_y ? h - 1 - y : y);
      agg::color_conv_row(tmp_buf, src, w, agg::color_conv_bgr24_to_rgb24());
      fwrite(tmp_buf, 1, w * 3, fd);
    }

  fclose(fd);
  return true;
}