Bug 995 - Painting of analog traces is semi-broken
Summary: Painting of analog traces is semi-broken
Status: CONFIRMED
Alias: None
Product: PulseView
Classification: Unclassified
Component: Data display (show other bugs)
Version: unreleased development snapshot
Hardware: All All
: Normal major
Target Milestone: ---
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-07-10 21:27 CEST by Soeren Apel
Modified: 2017-07-10 21:40 CEST (History)
1 user (show)


Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Soeren Apel 2017-07-10 21:27:08 CEST 
Using i2c/eeprom_24xx/microchip_24lc64/sainsmart_dds120_powerup_scl_sda_analog.sr as an example.

Issue #1: When zooming in on the "flat" part in the beginning, the smooth trace becomes slightly grainy. Painting is done via AnalogSignal::paint_envelope().

Issue #2: When zooming in further, the trace becomes thinner. Painting is done via AnalogSignal::paint_envelope().

Issue #3: Zooming in even further, AnalogSignal::paint_trace() takes over and the trace is suddenly too thin to even see. It becomes one with the zero line, giving the impression that the trace isn't even drawn. Zooming further in shows however that there is a trace once the sample dots become visible.

As those issues are very likely related, I'm only creating one bugzilla entry.