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gl_stream_buffer: Only flush the host buffer if anything was written.
This might happen in the new TBO upload path.
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@ -87,7 +87,7 @@ std::tuple<u8*, GLintptr, bool> OGLStreamBuffer::Map(GLsizeiptr size, GLintptr a
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void OGLStreamBuffer::Unmap(GLsizeiptr size) {
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ASSERT(size <= mapped_size);
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if (!coherent) {
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if (!coherent && size > 0) {
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glFlushMappedBufferRange(gl_target, buffer_pos - mapped_offset, size);
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}
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