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Make an effort at doing _something_ for G4.

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This commit is contained in:
Thomas Harte 2023-01-30 21:06:04 -05:00
parent 4c93d01fe2
commit 29af5542f8
1 changed files with 18 additions and 3 deletions
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21
Components/9918/Implementation/Draw.hpp
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@ -292,9 +292,19 @@ template <Personality personality>
template <ScreenMode mode>
void Base<personality>::draw_yamaha(LineBuffer &buffer, int start, int end) {
// TODO: sprites. And all other graphics modes.
// TODO: much smarter loops. Duff plus a tail?
if constexpr (mode == ScreenMode::YamahaGraphics4) {
for(int c = start >> 2; c < end >> 2; c++) {
pixel_target_[c] = Storage<personality>::palette_[
buffer.bitmap[c >> 1] >> ((((c & 1) ^ 1) << 2)) & 0xf
];
}
return;
}
if constexpr (mode == ScreenMode::YamahaGraphics5) {
// TODO: a much smarter loop.
for(int c = start >> 1; c < end >> 1; c++) {
pixel_target_[c] = Storage<personality>::palette_[
buffer.bitmap[c >> 2] >> ((((c & 3) ^ 3) << 1)) & 3
@ -310,13 +320,18 @@ template <Personality personality>
void Base<personality>::draw_yamaha(int start, int end) {
LineBuffer &line_buffer = line_buffers_[output_pointer_.row];
#define Dispatch(x) case ScreenMode::x: draw_yamaha<ScreenMode::x>(line_buffer, start, end); break;
if constexpr (is_yamaha_vdp(personality)) {
switch(line_buffer.screen_mode) {
case ScreenMode::YamahaGraphics5: draw_yamaha<ScreenMode::YamahaGraphics5>(line_buffer, start, end); break;
Dispatch(YamahaGraphics3);
Dispatch(YamahaGraphics4);
Dispatch(YamahaGraphics5);
Dispatch(YamahaGraphics6);
Dispatch(YamahaGraphics7);
default: break;
}
}
#undef Dispatch
}
// MARK: - Mega Drive