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hwr2: fix unaligned software copies

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This commit is contained in:
Eidolon 2023-08-31 20:52:53 -05:00
parent 78ccaf361b
commit 6b0c2c6fd8
1 changed files with 3 additions and 12 deletions
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15
src/hwr2/software_screen_renderer.cpp
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@ -50,21 +50,12 @@ void SoftwareScreenRenderer::draw(Rhi& rhi, Handle<GraphicsContext> ctx)
// If the screen width won't fit the unpack alignment, we need to copy the screen.
if (width_ % kPixelRowUnpackAlignment > 0)
{
std::size_t padded_width = (width_ + (kPixelRowUnpackAlignment - 1)) & !kPixelRowUnpackAlignment;
std::size_t padded_width = (width_ + (kPixelRowUnpackAlignment - 1)) & ~(kPixelRowUnpackAlignment - 1);
copy_buffer_.clear();
copy_buffer_.reserve(padded_width * height_);
copy_buffer_.resize(padded_width * height_, 0);
for (std::size_t y = 0; y < height_; y++)
{
for (std::size_t x = 0; x < width_; x++)
{
copy_buffer_.push_back(vid.buffer[(width_ * y) + x]);
}
// Padding to unpack alignment
for (std::size_t i = 0; i < padded_width - width_; i++)
{
copy_buffer_.push_back(0);
}
std::copy(&vid.buffer[width_ * y], &vid.buffer[width_ * (y + 1)], &copy_buffer_[padded_width * y]);
}
}