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Add text-mode events list.

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This commit is contained in:
Thomas Harte 2023-02-12 22:45:11 -05:00
parent 815a75d9b6
commit f5814b4c75
1 changed files with 59 additions and 1 deletions
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60
Components/9918/Implementation/Storage.hpp
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@ -53,11 +53,23 @@ template <Personality personality> struct Storage<personality, std::enable_if_t<
/// external data must be ready by in order to take part in those slots.
int offset = 1368;
enum class Type {
/// A slot for reading or writing data on behalf of the CPU or the command engine.
External,
//
// Bitmap modes.
//
DataBlock,
SpriteY,
SpriteLocation,
SpritePattern,
//
// Text modes.
//
Name,
Colour,
Pattern,
} type = Type::External;
constexpr Event(int offset, Type type) noexcept :
@ -147,7 +159,7 @@ template <Personality personality> struct Storage<personality, std::enable_if_t<
Storage() noexcept {
// Perform sanity checks on the event lists.
#ifndef NDEBUG
const Event *lists[] = { no_sprites_events.data(), refresh_events.data(), nullptr };
const Event *lists[] = { no_sprites_events.data(), sprites_events.data(), text_events.data(), /* character_events.data(), */ refresh_events.data(), nullptr };
const Event **list = lists;
while(*list) {
const Event *cursor = *list;
@ -326,6 +338,52 @@ template <Personality personality> struct Storage<personality, std::enable_if_t<
};
static constexpr auto no_sprites_events = events<BitmapEventsGenerator<false>>();
static constexpr auto sprites_events = events<BitmapEventsGenerator<true>>();
struct TextGenerator {
static constexpr std::optional<typename Event::Type> event(int grauw_index) {
// Capture various one-in-eight zones.
if(grauw_index < 72) {
return StandardGenerators::external_every_eight(grauw_index - 2);
}
if(grauw_index >= 166 && grauw_index < 228) {
return StandardGenerators::external_every_eight(grauw_index - 166);
}
if(grauw_index >= 1206 && grauw_index < 1332) {
return StandardGenerators::external_every_eight(grauw_index - 1206);
}
if(grauw_index == 1336) {
return Event::Type::External;
}
if(grauw_index >= 1346) {
return StandardGenerators::external_every_eight(grauw_index - 1346);
}
// Elsewhere...
if(grauw_index >= 246) {
const int offset = grauw_index - 246;
const int block = offset / 48;
const int sub_block = offset % 48;
switch(sub_block) {
default: break;
case 0: return Event::Type::Name;
case 18: return (block & 1) ? Event::Type::External : Event::Type::Colour;
case 24: return Event::Type::Pattern;
}
}
return std::nullopt;
}
};
static constexpr auto text_events = events<TextGenerator>();
struct CharacterGenerator {
static constexpr std::optional<typename Event::Type> event(int grauw_index) {
// TODO.
(void)grauw_index;
return std::nullopt;
}
};
static constexpr auto character_events = events<CharacterGenerator>();
};
// Master System-specific storage.