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Optimises slightly for black borders.

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Specifically to help to debug proper display of unused lines in the new scan target.
This commit is contained in:
Thomas Harte 2018-11-17 18:23:42 -05:00
parent 8f05560dd7
commit c5d9bf2c12
1 changed files with 10 additions and 4 deletions
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14
Components/9918/9918.cpp
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@ -479,11 +479,17 @@ void Base::output_border(int cycles, uint32_t cram_dot) {
}
if(cycles) {
uint32_t *const pixel_target = reinterpret_cast<uint32_t *>(crt_.begin_data(1));
if(pixel_target) {
*pixel_target = border_colour;
// If the border colour is 0, that can be communicated
// more efficiently as an explicit blank.
if(border_colour) {
uint32_t *const pixel_target = reinterpret_cast<uint32_t *>(crt_.begin_data(1));
if(pixel_target) {
*pixel_target = border_colour;
}
crt_.output_level(cycles);
} else {
crt_.output_blank(cycles);
}
crt_.output_level(cycles);
}
}