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Fix vertical timing; don't miss border colour changes.

This commit is contained in:
Thomas Harte 2024-04-24 20:47:11 -04:00
parent 7c9383cd6b
commit b82af9c471
1 changed files with 18 additions and 14 deletions
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32
Machines/Acorn/Archimedes/Video.hpp
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@ -191,19 +191,20 @@ struct Video {
};
// Possibly output something.
if(new_phase != phase_) {
if(new_phase != phase_ || (phase_ == Phase::Border && phased_border_colour_ != border_colour_)) {
if(time_in_phase_) {
const auto duration = static_cast<int>(time_in_phase_);
switch(phase_) {
case Phase::Sync: crt_.output_sync(duration); break;
case Phase::Blank: crt_.output_blank(duration); break;
case Phase::Display: flush_pixels(); break;
case Phase::Border: crt_.output_level<uint16_t>(duration, border_colour_); break;
case Phase::Sync: crt_.output_sync(duration); break;
case Phase::Blank: crt_.output_blank(duration); break;
case Phase::Display: flush_pixels(); break;
case Phase::Border: crt_.output_level<uint16_t>(duration, phased_border_colour_); break;
}
time_in_phase_ = 0;
}
phase_ = new_phase;
phased_border_colour_ = border_colour_;
}
// Update cursor pixel counter if applicable; this might mean triggering it
@ -373,18 +374,11 @@ private:
enum class Phase {
Sync, Blank, Border, Display,
};
template <bool is_vertical>
struct State {
uint32_t position = 0;
void increment_position(const Timing &timing) {
++position;
if(position == 1024) position = 0;
if(position == timing.period) {
state = DidRestart;
position = 0;
}
if(position == timing.sync_width) state |= SyncEnded;
if(position == timing.display_start) state |= DisplayStarted;
if(position == timing.display_end) state |= DisplayEnded;
@ -393,6 +387,14 @@ private:
cursor_active |= position == timing.cursor_start;
cursor_active &= position != timing.cursor_end;
if(position == timing.period) {
state = DidRestart;
position = 0;
} else {
++position;
if(position == 1024) position = 0;
}
}
static constexpr uint8_t SyncEnded = 0x1;
@ -429,11 +431,13 @@ private:
return Phase::Display;
}
};
State horizontal_state_, vertical_state_;
State<false> horizontal_state_;
State<true> vertical_state_;
Phase phase_ = Phase::Sync;
uint32_t time_in_phase_ = 0;
uint32_t pixel_count_ = 0;
uint16_t *pixels_ = nullptr;
uint16_t phased_border_colour_;
// It is elsewhere assumed that this size is a multiple of 8.
static constexpr size_t PixelBufferSize = 320;