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Deduplicate 40-column text fetching.

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This commit is contained in:
Thomas Harte 2023-02-17 22:23:10 -05:00
parent 8af0a2313c
commit 5b31db700b
1 changed files with 9 additions and 19 deletions
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28
Components/9918/Implementation/Fetch.hpp
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@ -111,12 +111,12 @@ struct TextFetcher {
row_base(base->pattern_name_address_ & bits10(AddressT((y >> 3) * 40))),
row_offset(base->pattern_generator_table_address_ & bits11(AddressT(y & 7))) {}
void fetch_name(AddressT column) {
base->name_[0] = base->ram_[row_base + column];
void fetch_name(AddressT column, int slot = 0) {
base->name_[slot] = base->ram_[row_base + column];
}
void fetch_pattern(AddressT column) {
line_buffer.characters.shapes[column] = base->ram_[row_offset + size_t(base->name_[0] << 3)];
void fetch_pattern(AddressT column, int slot = 0) {
line_buffer.characters.shapes[column] = base->ram_[row_offset + size_t(base->name_[slot] << 3)];
}
Base<personality> *const base;
@ -499,7 +499,7 @@ template<ScreenMode mode> void Base<personality>::fetch_yamaha(LineBuffer &line_
const uint8_t *const ram2 = &ram_[65536];
CharacterFetcher character_fetcher(this, line_buffer, next_line_buffer, y);
// TextFetcher text_fetcher(this, line_buffer, y);
TextFetcher text_fetcher(this, line_buffer, y);
using Type = typename Storage<personality>::Event::Type;
while(Storage<personality>::next_event_->offset < end) {
@ -512,14 +512,8 @@ template<ScreenMode mode> void Base<personality>::fetch_yamaha(LineBuffer &line_
switch(mode) {
case ScreenMode::Text: {
const auto column = AddressT(Storage<personality>::data_block_);
const AddressT start = pattern_name_address_ & (0x1fc00 | size_t(y >> 3) * 40);
name_[0] = ram_[start + column + 0];
name_[1] = ram_[start + column + 1];
// TODO: use fetcher after resolving ambiguity over name_[0]/name_[1]/etc.
// text_fetcher.fetch_name(column);
// text_fetcher.fetch_name(column + 1);
text_fetcher.fetch_name(column, 0);
text_fetcher.fetch_name(column + 1, 1);
} break;
case ScreenMode::YamahaText80: {
@ -566,12 +560,8 @@ template<ScreenMode mode> void Base<personality>::fetch_yamaha(LineBuffer &line_
const auto column = AddressT(Storage<personality>::data_block_);
Storage<personality>::data_block_ += 2;
const AddressT start = pattern_generator_table_address_ & (0x1f800 | (y & 7));
line_buffer.characters.shapes[column + 0] = ram_[start + AddressT(name_[0] << 3)];
line_buffer.characters.shapes[column + 1] = ram_[start + AddressT(name_[1] << 3)];
// text_fetcher.fetch_pattern(column);
// text_fetcher.fetch_pattern(column + 1);
text_fetcher.fetch_pattern(column, 0);
text_fetcher.fetch_pattern(column + 1, 1);
} break;
case ScreenMode::YamahaText80: {