// 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)); }
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; }
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; }