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Clamps 16-bit positioning values.

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This commit is contained in:
Thomas Harte 2020-11-15 19:14:57 -05:00
parent c3f5fbd300
commit 96e79301f3
1 changed files with 4 additions and 2 deletions
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6
Outputs/CRT/CRT.cpp
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@ -190,8 +190,10 @@ Flywheel::SyncEvent CRT::get_next_horizontal_sync_event(bool hsync_is_requested,
Outputs::Display::ScanTarget::Scan::EndPoint CRT::end_point(uint16_t data_offset) {
Display::ScanTarget::Scan::EndPoint end_point;
end_point.x = uint16_t(horizontal_flywheel_->get_current_output_position());
end_point.y = uint16_t(vertical_flywheel_->get_current_output_position() / vertical_flywheel_output_divider_);
// Clamp the available range on endpoints. These will almost always be within range, but may go
// out during times of resync.
end_point.x = uint16_t(std::min(horizontal_flywheel_->get_current_output_position(), 65535));
end_point.y = uint16_t(std::min(vertical_flywheel_->get_current_output_position() / vertical_flywheel_output_divider_, 65535));
end_point.data_offset = data_offset;
// Ensure .composite_angle is sampled at the location indicated by .cycles_since_end_of_horizontal_retrace.