Replace the C++ implementation with the Rust port

The Rust port (formerly gipfel-rs) is now the official successor to the
FLTK/GSL C++ code base. This squashes the port into a single commit and
removes the C++ sources (they remain in the git history below).

Layout:
  crates/gipfel-core  headless core: hills, panorama geometry, projections
                      (maxima-generated derivatives), pure-Rust LM fit,
                      gipfel: JPEG comment + EXIF I/O, profiles, stitching
  crates/gipfel-cli   command-line tools (export, info, stitch, profiles)
  crates/gipfel-app   Cosmic DE (libcosmic) GUI, binary name `gipfel`
  codegen/            maxima scripts + regen.sh for the projection code
  tests/              golden files + C++ reference harnesses (historical)

The original README is kept for now; it will be updated to describe the
Rust build. gipfel.dat, AUTHORS, ChangeLog and NEWS are unchanged.

1 files changed, 0 insertions, 65 deletions

diff --git a/src/PreviewOutputImage.cxx b/src/PreviewOutputImage.cxx
deleted file mode 100644
index 560f044..0000000
--- a/src/PreviewOutputImage.cxx
+++ /dev/null
@@ -1,65 +0,0 @@
-//
-// Copyright 2006-2009 Johannes Hofmann <Johannes.Hofmann@gmx.de>
-//
-// This software may be used and distributed according to the terms
-// of the GNU General Public License, incorporated herein by reference.
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <FL/Fl.H>
-#include <FL/fl_draw.H>
-
-#include "PreviewOutputImage.H"
-
-PreviewOutputImage::PreviewOutputImage(int X, int Y, int W, int H):
-	OutputImage(), Fl_Widget(X, Y, W, H) {
-	d = 3;
-	data = NULL;
-}
-
-PreviewOutputImage::~PreviewOutputImage() {
-	if (data)
-		free(data);
-}
-
-int
-PreviewOutputImage::init_internal() {
-	data = (uchar*) malloc(W * H * d);
-	memset(data, 0, W * H * d);
-	size(W, H);
-	return 0;
-}
-
-int
-PreviewOutputImage::set_pixel_internal(int x, int r, int g, int b) {
-	if (!data) 
-		return 1;
-
-	long index = (line * w() * d + (x * d));
-	*(data+index+0) = (unsigned char) (r / 255);
-	*(data+index+1) = (unsigned char) (g / 255);
-	*(data+index+2) = (unsigned char) (b / 255);
-
-	return 0;
-}
-
-int
-PreviewOutputImage::next_line_internal() {
-	if (line % 10 == 0) {
-		redraw();
-		Fl::check();
-	}
-	return 0;
-}
-
-void
-PreviewOutputImage::draw() {
-	if (!data)
-		return;
-
-	fl_push_clip(x(), y(), w(), h());
-	fl_draw_image(data, x(), y(), w(), h(), d);
-	fl_pop_clip();
-}