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Added a first attempt to generate output scans for composite mode. So this in theory completes the CPU side of composite operations. Though I'm sure problems will reveal themselves.

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This commit is contained in:
Thomas Harte 2016-03-05 21:18:28 -05:00
parent 3f39803d32
commit 6cddb4c9c8
1 changed files with 21 additions and 0 deletions
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21
Outputs/CRT/CRT.cpp
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@ -249,6 +249,27 @@ void CRT::advance_cycles(unsigned int number_of_cycles, unsigned int source_divi
// if this is horizontal retrace then advance the output line counter and bookend an output run
if(_output_device == CRT::Television)
{
Flywheel::SyncEvent honoured_event = (next_run_length == time_until_vertical_sync_event) ? next_vertical_sync_event : next_horizontal_sync_event;
bool needs_endpoint =
(honoured_event == Flywheel::SyncEvent::StartRetrace && _is_writing_composite_run) ||
(honoured_event == Flywheel::SyncEvent::EndRetrace && !_horizontal_flywheel->is_in_retrace() && !_vertical_flywheel->is_in_retrace());
if(needs_endpoint)
{
uint8_t *next_run = _run_builders[_run_write_pointer]->get_next_run(3);
output_position_x(0) = output_position_x(1) = output_position_x(2) = (uint16_t)_horizontal_flywheel->get_current_output_position();
output_position_y(0) = output_position_y(1) = output_position_y(2) = (uint16_t)(_vertical_flywheel->get_current_output_position() / _vertical_flywheel_output_divider);
output_timestamp(0) = output_timestamp(1) = output_timestamp(2) = _run_builders[_run_write_pointer]->duration;
output_tex_x(0) = output_tex_x(1) = output_tex_x(2) = tex_x;
output_tex_y(0) = output_tex_y(1) = output_tex_y(2) = tex_y;
output_lateral(0) = 0;
output_lateral(1) = _is_writing_composite_run ? 1 : 0;
output_lateral(2) = 1;
_is_writing_composite_run ^= true;
}
if(next_run_length == time_until_horizontal_sync_event && next_horizontal_sync_event == Flywheel::SyncEvent::EndRetrace)
{
_composite_src_output_y = (_composite_src_output_y + 1) % CRTIntermediateBufferHeight;