From 89199e9a97d6f7efbe473c7447374acc857adeca Mon Sep 17 00:00:00 2001
From: Valerio mariani <valerio.mariani@desy.de>
Date: Fri, 8 May 2015 10:54:17 +0200
Subject: Added colour scale to geoptimiser error maps

---
 libcrystfel/src/render.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++
 libcrystfel/src/render.h |  3 +-
 src/geoptimiser.c        | 16 ++++++++--
 3 files changed, 98 insertions(+), 3 deletions(-)

diff --git a/libcrystfel/src/render.c b/libcrystfel/src/render.c
index 17318782..2dcb7b93 100644
--- a/libcrystfel/src/render.c
+++ b/libcrystfel/src/render.c
@@ -104,6 +104,84 @@ static void render_rgb(double val, double max,
 }
 
 
+static void render_geoptimiser(double val, double max,
+                               double *rp, double *gp, double *bp)
+{
+	double r;
+	double p;
+
+	r = val/max;
+
+	if ( val < 0.0 ) {
+		*rp = 0.0;
+		*gp = 0.0;
+		*bp = 0.0;
+		return;
+	}
+
+	if ( r >= 0.0 && r < 0.059 ) {
+		p = (r-0.0)/(0.059-0.0);
+		*rp = 0.0;
+		*gp = 0.0;
+		*bp = ((91.0/256.0)-0.0)*p;
+		return;
+	}
+
+	if ( r >= 0.059 && r < 0.220 ) {
+		p = (r-0.059)/(0.220-0.059);
+		*rp = ((122.0/256.0)-0.0)*p;
+		*gp = 0.0;
+		*bp = ((227.0/256.0)-(91.0/256.0))*p+(91.0/256.0);
+		return;
+	}
+
+	if ( r >= 0.220 && r < 0.376 ) {
+		p = (r-0.220)/(0.376-0.220);
+		*rp = ((195.0/256.0)-(122.0/256.0))*p+(122.0/256.0);
+		*gp = 0.0;
+		*bp = ((93.0/256.0)-(227.0/256.0))*p+(227.0/256.0);
+		return;
+	}
+
+	if ( r >= 0.376 && r < 0.498 ) {
+		p = (r-0.376)/(0.498-0.376);
+		*rp = ((238.0/256.0)-(195.0/256.0))*p+(195.0/256.0);
+		*gp = ((76.0/256.0)-0.0)*p;
+		*bp = (0.0-(93.0/256.0))*p+(93.0/256.0);
+		return;
+	}
+
+	if ( r >= 0.498 && r < 0.564 ) {
+		p = (r-0.498)/(0.564-0.498);
+		*rp = (1.0-(238.0/256.0))*p+(238.0/256.0);
+		*gp = ((117.0/256.0)-(76.0/256.0))*p+(76.0/256.0);
+		*bp = 0.0;
+		return;
+	}
+
+	if ( r >= 0.564 && r < 0.815 ) {
+		p = (r-0.564)/(0.815-0.564);
+		*rp = 1.0;
+		*gp = ((234.0/256.0)-(117.0/256.0))*p+(117.0/256.0);
+		*bp = 0.0;
+		return;
+	}
+
+	if ( r >= 0.815 && r < 1.0 ) {
+		p = (r-0.815)/(1.0-0.815);
+		*rp = 1.0;
+		*gp = (1.0-(234.0/256.0))*p+(234.0/256.0);
+		*bp = (1.0-0.0)*p;
+		return;
+	}
+
+	if ( r >= 1.0 ) {
+		*rp = 1.0; *gp = 1.0; *bp = 1.0;
+		return;
+	}
+}
+
+
 static void render_ratio(double val, double max,
                          double *rp, double *gp, double *bp)
 {
@@ -164,5 +242,9 @@ void render_scale(double val, double max, int scale,
 		case SCALE_RATIO :
 		render_ratio(val, max, rp, gp, bp);
 		break;
+
+		case SCALE_GEOPTIMISER :
+		render_geoptimiser(val, max, rp, gp, bp);
+		break;
 	}
 }
diff --git a/libcrystfel/src/render.h b/libcrystfel/src/render.h
index a4da922d..c2e5965a 100644
--- a/libcrystfel/src/render.h
+++ b/libcrystfel/src/render.h
@@ -38,7 +38,8 @@ enum {
 	SCALE_COLOUR,
 	SCALE_MONO,
 	SCALE_INVMONO,
-	SCALE_RATIO
+	SCALE_RATIO,
+	SCALE_GEOPTIMISER
 };
 
 #ifdef __cplusplus
diff --git a/src/geoptimiser.c b/src/geoptimiser.c
index 1605e363..90875f54 100644
--- a/src/geoptimiser.c
+++ b/src/geoptimiser.c
@@ -2129,7 +2129,7 @@ static int draw_detector(cairo_surface_t *surf, struct image *image,
 	cr = cairo_create(surf);
 
 	unpack_slab(image);
-	pixbufs = render_panels(image, 1, 0, 1, &n_pixbufs);
+	pixbufs = render_panels(image, 1, 4, 1, &n_pixbufs);
 
 	/* Blank grey background */
 	cairo_rectangle(cr, 0.0, 0.0, rect.width, rect.height);
@@ -2178,6 +2178,8 @@ static int save_data_to_png(char *filename, struct detector *det,
 	struct image im;
 	int i;
 	struct rectangle rect;
+	GdkPixbuf *col_scale;
+	cairo_t *cr;
 
 	cairo_status_t r;
 	cairo_surface_t *surf;
@@ -2217,11 +2219,21 @@ static int save_data_to_png(char *filename, struct detector *det,
 	/* Add a thin border */
 	rect.width += 2.0;
 	rect.height += 2.0;
-	surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, rect.width,
+	surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, rect.width + 20,
 	                                  rect.height);
 
 	draw_detector(surf, &im, rect);
 
+	col_scale = render_get_colour_scale(20, rect.height, 4);
+
+	cr = cairo_create(surf);
+	cairo_identity_matrix(cr);
+	cairo_translate(cr, rect.width, 0.0);
+	cairo_rectangle(cr, 0.0, 0.0, 20.0, rect.height);
+	gdk_cairo_set_source_pixbuf(cr, col_scale, 0.0, 0.0);
+	cairo_fill(cr);
+	cairo_destroy(cr);
+
 	r = cairo_surface_write_to_png(surf, filename);
 	if (r != CAIRO_STATUS_SUCCESS) {
 		free(im.data);
-- 
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