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Renderer: Adjust source rectangle when crop would draw off screen

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This prevents us from requiring an oversized and/or negative viewport by
shrinking the source rectangle instead.
This commit is contained in:
Stenzek
2019-04-28 16:53:16 +10:00
parent d2d8d7ce90
commit 3c64f0c616
4 changed files with 57 additions and 10 deletions
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44
Source/Core/VideoCommon/RenderBase.cpp
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@ -561,6 +561,40 @@ float Renderer::CalculateDrawAspectRatio() const
}
}
void Renderer::AdjustRectanglesToFitBounds(MathUtil::Rectangle<int>* target_rect,
MathUtil::Rectangle<int>* source_rect, int fb_width,
int fb_height)
{
const int orig_target_width = target_rect->GetWidth();
const int orig_target_height = target_rect->GetHeight();
const int orig_source_width = source_rect->GetWidth();
const int orig_source_height = source_rect->GetHeight();
if (target_rect->left < 0)
{
const int offset = -target_rect->left;
target_rect->left = 0;
source_rect->left += offset * orig_source_width / orig_target_width;
}
if (target_rect->right > fb_width)
{
const int offset = target_rect->right - fb_width;
target_rect->right -= offset;
source_rect->right -= offset * orig_source_width / orig_target_width;
}
if (target_rect->top < 0)
{
const int offset = -target_rect->top;
target_rect->top = 0;
source_rect->top += offset * orig_source_height / orig_target_height;
}
if (target_rect->bottom > fb_height)
{
const int offset = target_rect->bottom - fb_height;
target_rect->right -= offset;
source_rect->right -= offset * orig_source_height / orig_target_height;
}
}
bool Renderer::IsHeadless() const
{
return true;
@ -1287,19 +1321,21 @@ void Renderer::Swap(u32 xfb_addr, u32 fb_width, u32 fb_stride, u32 fb_height, u6
void Renderer::RenderXFBToScreen(const AbstractTexture* texture, const MathUtil::Rectangle<int>& rc)
{
const auto target_rc = GetTargetRectangle();
auto adjusted_rc = rc;
auto target_rc = GetTargetRectangle();
AdjustRectanglesToFitBounds(&target_rc, &adjusted_rc, m_backbuffer_width, m_backbuffer_height);
if (g_ActiveConfig.stereo_mode == StereoMode::SBS ||
g_ActiveConfig.stereo_mode == StereoMode::TAB)
{
MathUtil::Rectangle<int> left_rc, right_rc;
std::tie(left_rc, right_rc) = ConvertStereoRectangle(target_rc);
m_post_processor->BlitFromTexture(left_rc, rc, texture, 0);
m_post_processor->BlitFromTexture(right_rc, rc, texture, 1);
m_post_processor->BlitFromTexture(left_rc, adjusted_rc, texture, 0);
m_post_processor->BlitFromTexture(right_rc, adjusted_rc, texture, 1);
}
else
{
m_post_processor->BlitFromTexture(target_rc, rc, texture, 0);
m_post_processor->BlitFromTexture(target_rc, adjusted_rc, texture, 0);
}
}