dallasgroot/Gimp
dallasgroot/Gimp
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

if multiple histogram values fall onto the same pixel, display the maximum

Browse source 
2003-11-01  Sven Neumann  <sven@gimp.org>

	* app/widgets/gimphistogramview.c (gimp_histogram_view_expose): if
	multiple histogram values fall onto the same pixel, display the
	maximum value.
This commit is contained in:
Sven Neumann 2003-11-01 16:11:26 +00:00 committed by Sven Neumann
parent e35668eb73
commit b2d192174b
2 changed files with 24 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
ChangeLog
View file

@ -1,3 +1,9 @@
2003-11-01 Sven Neumann <sven@gimp.org>
* app/widgets/gimphistogramview.c (gimp_histogram_view_expose): if
multiple histogram values fall onto the same x value, display the
maximum value.
2003-11-01 Sven Neumann <sven@gimp.org>
* app/base/gimphistogram.c (gimp_histogram_get_mean): forgot to

26
app/widgets/gimphistogramview.c
View file

@ -208,7 +208,7 @@ gimp_histogram_view_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GimpHistogramView *view = GIMP_HISTOGRAM_VIEW (widget);
gint x;
gint x, y;
gint x1, x2;
gint width, height;
gdouble max;
@ -243,22 +243,32 @@ gimp_histogram_view_expose (GtkWidget *widget,
/* Draw the spikes */
for (x = 0; x < width; x++)
{
gint y;
gdouble v = gimp_histogram_get_value (view->histogram,
view->channel,
(x * 256) / width);
gdouble v, value = 0.0;
gint i, j;
if (v <= 0.0)
i = (x * 256) / width;
j = ((x + 1) * 256) / width;
do
{
v = gimp_histogram_get_value (view->histogram, view->channel, i++);
if (v > value)
value = v;
}
while (i < j);
if (value <= 0.0)
continue;
switch (view->scale)
{
case GIMP_HISTOGRAM_SCALE_LINEAR:
y = (gint) ((height * v) / max);
y = (gint) ((height * value) / max);
break;
case GIMP_HISTOGRAM_SCALE_LOGARITHMIC:
y = (gint) ((height * log (v)) / max);
y = (gint) ((height * log (value)) / max);
break;
default: