steffen
/
SimpleSkyCam
2
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

Logarithmic histogram for testing...

Browse Source
master
Stefan Jahn 3 years ago
parent 8cbf46d78e
commit ca56050ec5
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File

8
histogram.cc
Unescape View File

@ -70,8 +70,8 @@ void cb_histogramda_draw(GtkWidget *area, cairo_t *cr, int w, int h, gpointer da
int histogram_width = histogram_zoom_stop - histogram_zoom_start; int histogram_width = histogram_zoom_stop - histogram_zoom_start;
for (int i = 0; i < histogram_width; i++) { for (int i = 0; i < histogram_width; i++) {
px = HISTOGRAM_MARGIN + ((clientw-HISTOGRAM_MARGIN*2) * i) / histogram_width; px = HISTOGRAM_MARGIN + ((clientw-HISTOGRAM_MARGIN*2) * i) / histogram_width;
py2 = (clienth-HISTOGRAM_MARGIN) - ((clienth-HISTOGRAM_MARGIN*2) * histogram[chan][histogram_zoom_start+i]) / histogram_max; py2 = (clienth-HISTOGRAM_MARGIN) - ((clienth-HISTOGRAM_MARGIN*2) * log10(histogram[chan][histogram_zoom_start+i]+1) / log10(histogram_max));
if (i == 0) cairo_move_to(cr, px, py2); if (i == 0) cairo_move_to(cr, px, py2);
else cairo_line_to(cr, px, py2); else cairo_line_to(cr, px, py2);
@ -202,13 +202,13 @@ void cb_histogramda_btnrelease (GtkWidget *widget, gpointer data) {
// translate first coordinate // translate first coordinate
histogram_zoom_start = (histogram_pressed_x - HISTOGRAM_MARGIN) * HISTOGRAM_WIDTH / (clientw - HISTOGRAM_MARGIN*2); histogram_zoom_start = (histogram_pressed_x - HISTOGRAM_MARGIN) * HISTOGRAM_WIDTH / (clientw - HISTOGRAM_MARGIN*2);
if (histogram_zoom_start < 0) histogram_zoom_start = 0; if (histogram_zoom_start < 0) histogram_zoom_start = 0;
if (histogram_zoom_start > 256) histogram_zoom_start = 256; if (histogram_zoom_start > HISTOGRAM_WIDTH) histogram_zoom_start = HISTOGRAM_WIDTH;
// translate second coordinate // translate second coordinate
histogram_zoom_stop = (histogram_released_x - HISTOGRAM_MARGIN) * HISTOGRAM_WIDTH / (clientw - HISTOGRAM_MARGIN*2) + 1; histogram_zoom_stop = (histogram_released_x - HISTOGRAM_MARGIN) * HISTOGRAM_WIDTH / (clientw - HISTOGRAM_MARGIN*2) + 1;
// limit the values // limit the values
if (histogram_zoom_stop < 0) histogram_zoom_stop = 0; if (histogram_zoom_stop < 0) histogram_zoom_stop = 0;
if (histogram_zoom_stop > 256) histogram_zoom_stop = 256; if (histogram_zoom_stop > HISTOGRAM_WIDTH) histogram_zoom_stop = HISTOGRAM_WIDTH;
// exchange the values if necessary // exchange the values if necessary
if (histogram_zoom_start > histogram_zoom_stop) { if (histogram_zoom_start > histogram_zoom_stop) {

Write Preview
Loading…
Cancel
Save