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Fixed proper starting position for (interrupted) tile drawing.

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This commit is contained in:
Thomas Harte 2018-10-08 23:13:37 -04:00
parent 748366c70e
commit 2d8ab72e22
1 changed files with 3 additions and 2 deletions
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5
Components/9918/9918.cpp
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@ -724,12 +724,12 @@ void Base::draw_sms(int start, int end) {
if(row_ >= 16 || !master_system_.horizontal_scroll_lock) {
for(int c = start; c < (master_system_.horizontal_scroll & 7); ++c) {
colour_buffer[c] = 16 + background_colour_;
++tile_offset;
}
// Remove the border area from that to which tiles will be drawn.
tile_start = std::max(start - (master_system_.horizontal_scroll & 7), 0);
tile_end = std::max(end - (master_system_.horizontal_scroll & 7), 0);
tile_offset += master_system_.horizontal_scroll & 7;
}
@ -754,7 +754,6 @@ void Base::draw_sms(int start, int end) {
pattern <<= shift;
while(true) {
pixels_left -= length;
const int palette_offset = (master_system_.names[byte_column].flags&0x18) << 1;
if(master_system_.names[byte_column].flags&2) {
for(int c = 0; c < length; ++c) {
@ -780,7 +779,9 @@ void Base::draw_sms(int start, int end) {
}
}
pixels_left -= length;
if(!pixels_left) break;
length = std::min(8, pixels_left);
byte_column++;
pattern = *reinterpret_cast<uint32_t *>(master_system_.tile_graphics[byte_column]);