sgilissen/llamaplayer
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

GPU: Handle VRAM wrap-around behavior on scanout

Browse Source
This commit is contained in:
Connor McLaughlin
2020-04-11 16:09:03 +10:00
parent fc3efebb38
commit 9e024b7a51
6 changed files with 131 additions and 74 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
src/core/gpu.cpp
View File

@ -487,22 +487,19 @@ void GPU::UpdateCRTCDisplayParameters()
if (horizontal_display_end <= horizontal_visible_end_tick)
{
cs.display_vram_width = std::min<u16>(
cs.display_vram_width =
std::max<u16>((((horizontal_display_end - std::max(horizontal_display_start, horizontal_visible_start_tick)) +
(cs.dot_clock_divider - 1)) /
cs.dot_clock_divider),
1u),
VRAM_WIDTH - cs.display_vram_left);
1u);
}
else
{
cs.display_vram_width = std::min<u16>(
std::max<u16>(
(((horizontal_visible_end_tick - std::max(horizontal_display_start, horizontal_visible_start_tick)) +
(cs.dot_clock_divider - 1)) /
cs.dot_clock_divider),
1u),
VRAM_WIDTH - cs.display_vram_left);
cs.display_vram_width = std::max<u16>(
(((horizontal_visible_end_tick - std::max(horizontal_display_start, horizontal_visible_start_tick)) +
(cs.dot_clock_divider - 1)) /
cs.dot_clock_divider),
1u);
}
if (vertical_display_start >= vertical_visible_start_line)
@ -513,21 +510,19 @@ void GPU::UpdateCRTCDisplayParameters()
else
{
cs.display_origin_top = 0;
cs.display_vram_top = std::min<u16>(
m_crtc_state.regs.Y + ((vertical_visible_start_line - vertical_display_start) << height_shift), VRAM_HEIGHT - 1);
cs.display_vram_top =
m_crtc_state.regs.Y + ((vertical_visible_start_line - vertical_display_start) << height_shift);
}
if (vertical_display_end <= vertical_visible_end_line)
{
cs.display_vram_height = std::min<u16>(
(vertical_display_end - std::max(vertical_display_start, vertical_visible_start_line)) << height_shift,
VRAM_HEIGHT - cs.display_vram_top);
cs.display_vram_height = (vertical_display_end - std::max(vertical_display_start, vertical_visible_start_line))
<< height_shift;
}
else
{
cs.display_vram_height = std::min<u16>(
(vertical_visible_end_line - std::max(vertical_display_start, vertical_visible_start_line)) << height_shift,
VRAM_HEIGHT - cs.display_vram_top);
cs.display_vram_height = (vertical_visible_end_line - std::max(vertical_display_start, vertical_visible_start_line))
<< height_shift;
}
}