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Attempt to update frame areas.

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This commit is contained in:
Thomas Harte
2026-02-15 07:51:38 -05:00
parent f24a8ea93f
commit 4b9e37f163
1 changed files with 19 additions and 3 deletions
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Outputs/ScanTargets/BufferingScanTarget.cpp
+19 -3
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@@ -220,9 +220,19 @@ void BufferingScanTarget::announce(
is_first_in_frame_ = true;
previous_frame_was_complete_ = frame_is_complete_;
frame_is_complete_ = true;
//
// const auto write = frame_write_.load(std::memory_order_relaxed);
// frames_[write].first_line =
auto write = frame_write_.load(std::memory_order_relaxed);
const auto submit_pointers = submit_pointers_.load(std::memory_order_relaxed);
frames_[write].first_line = submit_pointers.line;
frames_[write].first_scan = submit_pointers.scan;
write = (write + 1) % frames_.size();
frame_write_.store(write, std::memory_order_release);
auto read = frame_read_.load(std::memory_order_relaxed);
if(read == write) {
read = (read + 1) % frames_.size();
frame_read_.store(read, std::memory_order_relaxed);
}
}
// Proceed from here only if a change in visibility has occurred.
@@ -331,6 +341,8 @@ BufferingScanTarget::OutputArea BufferingScanTarget::get_output_area() {
// cleared for submission.
const auto submit_pointers = submit_pointers_.load(std::memory_order_acquire);
const auto read_ahead_pointers = read_ahead_pointers_.load(std::memory_order_relaxed);
const auto frame_read = frame_read_.load(std::memory_order_relaxed);
const auto frame_write = frame_write_.load(std::memory_order_relaxed);
std::atomic_thread_fence(std::memory_order_acquire);
OutputArea area;
@@ -341,6 +353,9 @@ BufferingScanTarget::OutputArea BufferingScanTarget::get_output_area() {
area.begin.scan = read_ahead_pointers.scan;
area.end.scan = submit_pointers.scan;
area.begin.frame = frame_read;
area.end.frame = frame_write;
area.begin.write_area_x = texture_address_get_x(read_ahead_pointers.write_area);
area.begin.write_area_y = texture_address_get_y(read_ahead_pointers.write_area);
area.end.write_area_x = texture_address_get_x(submit_pointers.write_area);
@@ -348,6 +363,7 @@ BufferingScanTarget::OutputArea BufferingScanTarget::get_output_area() {
// Update the read-ahead pointers.
read_ahead_pointers_.store(submit_pointers, std::memory_order_relaxed);
frame_read_.store(frame_write, std::memory_order_relaxed);
#ifndef NDEBUG
area.counter = output_area_counter_;