From 55c566558b168b434e955dbefca4745c3a4932a2 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Tue, 21 Nov 2017 22:32:42 +0100
Subject: Calculate image sizes to fill frames horizontally

---
 src/frame.c     | 21 +++++++++++++++++++++
 src/sc_interp.c | 27 ++++++++++++++++++---------
 2 files changed, 39 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/frame.c b/src/frame.c
index 4a64e35..cc47208 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -29,6 +29,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
 
 #include "sc_parse.h"
 #include "frame.h"
@@ -69,6 +70,8 @@ struct _paragraph
 	char            *filename;
 	double           image_w;
 	double           image_h;
+	int              image_real_w;
+	int              image_real_h;
 
 	/* For PARA_TYPE_CALLBACK */
 	double                cb_w;
@@ -283,6 +286,15 @@ void wrap_paragraph(Paragraph *para, PangoContext *pc, double w,
 
 	w -= para->space[0] + para->space[1];
 
+	if ( para->type == PARA_TYPE_IMAGE ) {
+		if ( para->image_w < 0.0 ) {
+			para->image_w = w;
+			para->image_h = w*((float)para->image_real_h/para->image_real_w);
+		}
+		para->height = para->image_h;
+		return;
+	}
+
 	if ( para->type != PARA_TYPE_TEXT ) return;
 
 	for ( i=0; i<para->n_runs; i++ ) {
@@ -478,6 +490,7 @@ void add_image_para(struct frame *fr, SCBlock *scblock, const char *filename,
                     double w, double h, int editable)
 {
 	Paragraph *pnew;
+	int wi, hi;
 
 	pnew = create_paragraph(fr);
 	if ( pnew == NULL ) {
@@ -485,11 +498,19 @@ void add_image_para(struct frame *fr, SCBlock *scblock, const char *filename,
 		return;
 	}
 
+	if ( gdk_pixbuf_get_file_info(filename, &wi, &hi) == NULL ) {
+		fprintf(stderr, "Couldn't get size for %s\n", filename);
+		wi = 100;
+		hi = 100;
+	}
+
 	pnew->type = PARA_TYPE_IMAGE;
 	pnew->scblock = scblock;
 	pnew->filename = strdup(filename);
 	pnew->image_w = w;
 	pnew->image_h = h;
+	pnew->image_real_w = wi;
+	pnew->image_real_h = hi;
 	pnew->height = h;
 	pnew->open = 0;
 	pnew->space[0] = 0.0;
diff --git a/src/sc_interp.c b/src/sc_interp.c
index b4ec7cd..b530941 100644
--- a/src/sc_interp.c
+++ b/src/sc_interp.c
@@ -723,20 +723,29 @@ static int parse_dims(const char *opt, struct frame *parent,
 	if ( check == w ) goto invalid;
 	w_units = get_units(w);
 	if ( w_units == UNITS_FRAC ) {
-		double pw = parent->w;
-		pw -= parent->pad_l;
-		pw -= parent->pad_r;
-		*wp = pw * *wp;
+		if ( parent != NULL ) {
+			double pw = parent->w;
+			pw -= parent->pad_l;
+			pw -= parent->pad_r;
+			*wp = pw * *wp;
+		} else {
+			*wp = -1.0;
+		}
+
 	}
 
 	*hp = strtod(h, &check);
 	if ( check == h ) goto invalid;
 	h_units = get_units(h);
 	if ( h_units == UNITS_FRAC ) {
-		double ph = parent->h;
-		ph -= parent->pad_t;
-		ph -= parent->pad_b;
-		*hp = ph * *hp;
+		if ( parent != NULL ) {
+			double ph = parent->h;
+			ph -= parent->pad_t;
+			ph -= parent->pad_b;
+			*hp = ph * *hp;
+		} else {
+			*hp = -1.0;
+		}
 	}
 
 	*xp= strtod(x, &check);
@@ -810,7 +819,7 @@ static int parse_image_option(const char *opt, struct frame *parent,
 	if ( (index(opt, 'x') != NULL) && (index(opt, '+') != NULL)
 	  && (index(opt, '+') != rindex(opt, '+')) ) {
 		double dum;
-		return parse_dims(opt, parent, wp, hp, &dum, &dum);
+		return parse_dims(opt, NULL, wp, hp, &dum, &dum);
 	}
 
 	if ( strncmp(opt, "filename=\"", 10) == 0 ) {
-- 
cgit v1.2.3