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Slightly reorganise.

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This commit is contained in:
Thomas Harte 2020-07-24 16:20:20 -04:00
parent 66165a6dea
commit 89acb70091
1 changed files with 9 additions and 6 deletions
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15
Outputs/ScanTargets/BufferingScanTarget.hpp
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@ -52,6 +52,10 @@ class BufferingScanTarget: public Outputs::Display::ScanTarget {
BufferingScanTarget();
// This is included because it's assumed that scan targets will want to expose one.
// It is the subclass's responsibility to post timings.
Metrics display_metrics_;
// Extends the definition of a Scan to include two extra fields,
// completing this scan's source data and destination locations.
struct Scan {
@ -99,10 +103,14 @@ class BufferingScanTarget: public Outputs::Display::ScanTarget {
bool modals_are_dirty_ = false;
/// Maintains a buffer of the most recent scans.
// TODO: have the owner supply a buffer and its size.
// TODO: have the owner supply buffers and sizes.
// That'll allow owners to place this in shared video memory if possible.
std::array<Scan, 16384> scan_buffer_;
std::array<Line, LineBufferHeight> line_buffer_;
std::array<LineMetadata, LineBufferHeight> line_metadata_buffer_;
// TODO: make this an implementation detail.
// ... and expose some sort of difference?
struct PointerSet {
// This constructor is here to appease GCC's interpretation of
// an ambiguity in the C++ standard; cf. https://stackoverflow.com/questions/17430377
@ -121,11 +129,6 @@ class BufferingScanTarget: public Outputs::Display::ScanTarget {
/// A pointer to the first thing not yet submitted for display.
std::atomic<PointerSet> read_pointers_;
Metrics display_metrics_;
std::array<Line, LineBufferHeight> line_buffer_;
std::array<LineMetadata, LineBufferHeight> line_metadata_buffer_;
// Used by subclasses to set a new base address for the texture.
// When called this will flush all existing data and load up the
// new data size.