void StagingTexture2D::WriteTexels(u32 x, u32 y, u32 width, u32 height, const void* data,
u32 data_stride)
{
// Optimal path: same dimensions, same stride.
ASSERT((x + width) <= m_width && (y + height) <= m_height);
bool use_optimal_path = x == 0 && width == m_width && m_row_stride == data_stride;
u32 block_width = Util::GetBlockWidth(m_format);
if (block_width > 1)
{
x = std::max(0u, (x + block_width - 1) / block_width);
y = std::max(0u, (y + block_width - 1) / block_width);
width = std::max(1u, (width + block_width - 1) / block_width);
height = std::max(1u, (height + block_width - 1) / block_width);
}
char* dst_ptr = GetRowPointer(y);
if (use_optimal_path)
{
std::memcpy(dst_ptr, data, m_row_stride * height);
return;
}
u32 copy_size = std::min(width * m_texel_size, data_stride);
const char* src_ptr = reinterpret_cast<const char*>(data);
for (u32 row = 0; row < height; row++)
{
std::memcpy(dst_ptr + (x * m_texel_size), src_ptr, copy_size);
dst_ptr += m_row_stride;
src_ptr += data_stride;
}
}
void StagingTexture2D::WriteTexels(u32 x, u32 y, u32 width, u32 height, const void* data,
u32 data_stride)
{
char* dst_ptr = GetRowPointer(y);
// Optimal path: same dimensions, same stride.
_assert_((x + width) <= m_width && (y + height) <= m_height);
if (x == 0 && width == m_width && m_row_stride == data_stride)
{
memcpy(dst_ptr, data, m_row_stride * height);
return;
}
u32 copy_size = std::min(width * m_texel_size, data_stride);
const char* src_ptr = reinterpret_cast<const char*>(data);
for (u32 row = 0; row < height; row++)
{
memcpy(dst_ptr + (x * m_texel_size), src_ptr, copy_size);
dst_ptr += m_row_stride;
src_ptr += data_stride;
}
}
