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Builds in a colour burst, producing colour composite.

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This commit is contained in:
Thomas Harte 2021-03-19 22:25:37 -04:00
parent 2ee478b4c4
commit 7d59ff6d8f
1 changed files with 34 additions and 3 deletions
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37
Machines/Sinclair/ZXSpectrum/Video.hpp
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@ -81,6 +81,8 @@ template <VideoTiming timing> class Video {
constexpr int first_line = timings.first_delay / timings.cycles_per_line;
constexpr int sync_position = 166 * 2;
constexpr int sync_length = 14 * 2;
constexpr int burst_position = sync_position + 40;
constexpr int burst_length = 17;
int cycles_remaining = duration.as<int>();
while(cycles_remaining) {
@ -106,13 +108,25 @@ template <VideoTiming timing> class Video {
offset += border_duration;
}
if(offset >= sync_position && offset < sync_position+sync_length && end_offset > offset) {
if(offset >= sync_position && offset < sync_position + sync_length && end_offset > offset) {
const int sync_duration = std::min(sync_position + sync_length, end_offset) - offset;
crt_.output_sync(sync_duration);
offset += sync_duration;
}
if(offset >= sync_position + sync_length && end_offset > offset) {
if(offset >= sync_position + sync_length && offset < burst_position && end_offset > offset) {
const int blank_duration = std::min(burst_position, end_offset) - offset;
crt_.output_blank(blank_duration);
offset += blank_duration;
}
if(offset >= burst_position && offset < burst_position+burst_length && end_offset > offset) {
const int burst_duration = std::min(burst_position + burst_length, end_offset) - offset;
crt_.output_default_colour_burst(burst_duration);
offset += burst_duration;
}
if(offset >= burst_position+burst_length && end_offset > offset) {
const int border_duration = end_offset - offset;
output_border(border_duration);
}
@ -177,7 +191,19 @@ template <VideoTiming timing> class Video {
offset += sync_duration;
}
if(offset >= sync_position + sync_length && end_offset > offset) {
if(offset >= sync_position + sync_length && offset < burst_position && end_offset > offset) {
const int blank_duration = std::min(burst_position, end_offset) - offset;
crt_.output_blank(blank_duration);
offset += blank_duration;
}
if(offset >= burst_position && offset < burst_position+burst_length && end_offset > offset) {
const int burst_duration = std::min(burst_position + burst_length, end_offset) - offset;
crt_.output_default_colour_burst(burst_duration);
offset += burst_duration;
}
if(offset >= burst_position + burst_length && end_offset > offset) {
const int border_duration = end_offset - offset;
output_border(border_duration);
}
@ -255,6 +281,11 @@ template <VideoTiming timing> class Video {
return crt_.get_scaled_scan_status();
}
/*! Sets the type of display the CRT will request. */
void set_display_type(Outputs::Display::DisplayType type) {
crt_.set_display_type(type);
}
private:
int time_since_interrupt_ = 0;
Outputs::CRT::CRT crt_;