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Added left border hiding.

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This commit is contained in:
Thomas Harte 2018-10-04 18:52:23 -04:00
parent 89db1d6a6a
commit 858721a7a5
2 changed files with 10 additions and 3 deletions
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11
Components/9918/9918.cpp
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@ -255,7 +255,7 @@ void TMS9918::run_for(const HalfCycles cycles) {
mode_timing_.first_pixel_output_column,
mode_timing_.next_border_column,
if(start == mode_timing_.first_pixel_output_column) {
pixel_target_ = reinterpret_cast<uint32_t *>(
pixel_origin_ = pixel_target_ = reinterpret_cast<uint32_t *>(
crt_->allocate_write_area(static_cast<unsigned int>(mode_timing_.next_border_column - mode_timing_.first_pixel_output_column) + 8) // TODO: the +8 is really for the SMS only; make it optional.
);
}
@ -275,7 +275,7 @@ void TMS9918::run_for(const HalfCycles cycles) {
if(end == mode_timing_.next_border_column) {
const unsigned int length = static_cast<unsigned int>(mode_timing_.next_border_column - mode_timing_.first_pixel_output_column);
crt_->output_data(length * 4, length);
pixel_target_ = nullptr;
pixel_origin_ = pixel_target_ = nullptr;
}
);
@ -647,6 +647,8 @@ void Base::draw_tms_text(int start, int end) {
}
void Base::draw_sms(int start, int end) {
const bool is_end = end == 256;
// Shift the output window by the fine scroll amount, and fill in
// any border pixels that leaves on the left-hand side.
start -= master_system_.horizontal_scroll & 7;
@ -707,6 +709,11 @@ void Base::draw_sms(int start, int end) {
pattern = *reinterpret_cast<uint32_t *>(master_system_.tile_graphics[byte_column]);
}
if(is_end && master_system_.hide_left_column) {
pixel_origin_[0] = pixel_origin_[1] = pixel_origin_[2] = pixel_origin_[3] =
pixel_origin_[4] = pixel_origin_[5] = pixel_origin_[6] = pixel_origin_[7] =
master_system_.colour_ram[16 + background_colour_];
}
// const int pixels_left = pixels_end - output_column_;
// const int pixel_location = output_column_ - first_pixel_column_;
// const int reverses[2] = {0, 7};

2
Components/9918/Implementation/9918Base.hpp
View File

@ -687,7 +687,7 @@ class Base {
#undef external_slot
#undef slot
uint32_t *pixel_target_ = nullptr;
uint32_t *pixel_target_ = nullptr, *pixel_origin_ = nullptr;
void draw_tms_character(int start, int end);
void draw_tms_text(int start, int end);
void draw_sms(int start, int end);