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Uses explicit state to determine whether a pixel target has been requested.

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This commit is contained in:
Thomas Harte 2018-10-21 21:18:41 -04:00
parent fb3171f366
commit 883680731a
2 changed files with 4 additions and 1 deletions
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4
Components/9918/9918.cpp
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@ -370,7 +370,8 @@ void TMS9918::run_for(const HalfCycles cycles) {
intersect(
line_buffer.first_pixel_output_column,
line_buffer.next_border_column,
if(start == line_buffer.first_pixel_output_column) {
if(!asked_for_write_area_) {
asked_for_write_area_ = true;
pixel_origin_ = pixel_target_ = reinterpret_cast<uint32_t *>(
crt_->allocate_write_area(static_cast<unsigned int>(line_buffer.next_border_column - line_buffer.first_pixel_output_column))
);
@ -392,6 +393,7 @@ void TMS9918::run_for(const HalfCycles cycles) {
const unsigned int length = static_cast<unsigned int>(line_buffer.next_border_column - line_buffer.first_pixel_output_column);
crt_->output_data(length * 4, length);
pixel_origin_ = pixel_target_ = nullptr;
asked_for_write_area_ = false;
}
);

1
Components/9918/Implementation/9918Base.hpp
View File

@ -788,6 +788,7 @@ class Base {
#undef slot
uint32_t *pixel_target_ = nullptr, *pixel_origin_ = nullptr;
bool asked_for_write_area_ = false;
void draw_tms_character(int start, int end);
void draw_tms_text(int start, int end);
void draw_sms(int start, int end);