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Sets things up for implementation of the inner mode-specific logic.

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This commit is contained in:
Thomas Harte 2018-10-02 21:58:09 -04:00
parent 1dd5272190
commit 499fc62187
2 changed files with 39 additions and 77 deletions
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107
Components/9918/9918.cpp
View File

@ -183,11 +183,10 @@ void TMS9918::run_for(const HalfCycles cycles) {
function<false>(first_window, final_window);\
}
// TODO: column_ and end_column are in 342-per-line cycles;
// column_ and end_column are in 342-per-line cycles;
// adjust them to a count of windows.
int first_window = column_ >> 1;
int final_window = end_column >> 1;
const int first_window = column_ >> 1;
const int final_window = end_column >> 1;
if(first_window != final_window) {
switch(line_mode_) {
case LineMode::Text: fetch(fetch_tms_text); break;
@ -252,30 +251,33 @@ void TMS9918::run_for(const HalfCycles cycles) {
intersect(73, mode_timing_.first_pixel_output_column, output_border(end - start));
// In pixel area:
intersect(mode_timing_.first_pixel_output_column, mode_timing_.next_border_column,
crt_->output_blank((end - start)*4);
intersect(
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 *>(
crt_->allocate_write_area(static_cast<unsigned int>(mode_timing_.next_border_column - mode_timing_.first_pixel_output_column))
);
}
if(pixel_target_) {
const int relative_start = start - mode_timing_.first_pixel_output_column;
const int relative_end = end - mode_timing_.first_pixel_output_column;
switch(line_mode_) {
case LineMode::SMS: draw_sms(relative_start, relative_end); break;
case LineMode::Character: draw_tms_character(relative_start, relative_end); break;
case LineMode::Text: draw_tms_text(relative_start, relative_end); break;
case LineMode::Refresh: break; /* Dealt with elsewhere. */
}
}
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;
}
);
// const int pixel_start = std::max(column_, mode_timing_.first_pixel_output_column);
// const int pixel_end = std::min(end_column, mode_timing_.next_border_column);
// if(pixel_end > pixel_start) {
// crt_->output_blank((pixel_end - pixel_start)*4);
// switch(screen_mode_) {
// case ScreenMode::Text:
// draw_tms_text();
// break;
//
// case ScreenMode::ColouredText:
// case ScreenMode::Graphics:
// draw_tms_graphics();
// break;
//
// case ScreenMode::SMSMode4:
// draw_sms();
// break;
//
// default: break;
// }
// }
// Additional right border, if called for.
if(mode_timing_.next_border_column != 342) {
@ -290,30 +292,6 @@ void TMS9918::run_for(const HalfCycles cycles) {
/* if(row_ < 192 && current_mode_ != ScreenMode::Blank) {
// ----------------------
// Output horizontal sync
// ----------------------
if(!output_column_ && column_ >= 26) {
crt_->output_sync(13 * 4);
crt_->output_default_colour_burst(13 * 4);
output_column_ = 26;
}
// -------------------
// Output left border.
// -------------------
if(output_column_ >= 26) {
int pixels_end = std::min(first_pixel_column_, column_);
if(output_column_ < pixels_end) {
output_border(pixels_end - output_column_);
output_column_ = pixels_end;
// Grab a pointer for drawing pixels to, if the moment has arrived.
if(pixels_end == first_pixel_column_) {
pixel_base_ = pixel_target_ = reinterpret_cast<uint32_t *>(crt_->allocate_write_area(static_cast<unsigned int>(first_right_border_column_ - first_pixel_column_)));
}
}
}
// --------------
// Output pixels.
@ -501,14 +479,7 @@ void TMS9918::run_for(const HalfCycles cycles) {
}
}
// --------------------
// Output right border.
// --------------------
if(output_column_ >= first_right_border_column_) {
output_border(column_ - output_column_);
output_column_ = column_;
}
} }*/
}*/
// -----------------
// End video stream.
// -----------------
@ -708,24 +679,14 @@ bool TMS9918::get_interrupt_line() {
// MARK: -
void Base::draw_tms_graphics() {
void Base::draw_tms_character(int start, int end) {
}
void Base::draw_tms_text() {
void Base::draw_tms_text(int start, int end) {
}
void Base::draw_sms() {
uint32_t *const pixel_target_ = reinterpret_cast<uint32_t *>(crt_->allocate_write_area(256));
if(pixel_target_) {
for(int c = 0; c < 256; ++c)
void Base::draw_sms(int start, int end) {
for(int c = start; c < end; ++c) {
pixel_target_[c] = static_cast<uint32_t>(c * 0x01010101);
}
crt_->output_data(256 * 4, 256);
}
// output_border(pixel_end - pixel_start);

7
Components/9918/Implementation/9918Base.hpp
View File

@ -687,9 +687,10 @@ class Base {
#undef external_slot
#undef slot
void draw_tms_graphics();
void draw_tms_text();
void draw_sms();
uint32_t *pixel_target_ = nullptr;
void draw_tms_character(int start, int end);
void draw_tms_text(int start, int end);
void draw_sms(int start, int end);
};