[HACK] AMD workaround
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@ -14,16 +14,25 @@ OGLStreamBuffer::OGLStreamBuffer(GLenum target, GLsizeiptr size, bool prefer_coh
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gl_buffer.Create();
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glBindBuffer(gl_target, gl_buffer.handle);
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GLsizeiptr allocate_size = size;
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if (target == GL_ARRAY_BUFFER) {
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// On AMD GPU there is a strange crash in indexed drawing. The crash happens when the buffer
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// read position is near the end and the crash looks like an out-of-bound access. Doubling
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// the allocation size for the vertex buffer seems to avoid the crash.
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// TODO (wwylele): investigate what actually happens here.
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allocate_size *= 2;
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}
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if (GLAD_GL_ARB_buffer_storage) {
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persistent = true;
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coherent = prefer_coherent;
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GLbitfield flags =
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GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | (coherent ? GL_MAP_COHERENT_BIT : 0);
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glBufferStorage(gl_target, buffer_size, nullptr, flags);
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glBufferStorage(gl_target, allocate_size, nullptr, flags);
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mapped_ptr = static_cast<u8*>(glMapBufferRange(
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gl_target, 0, buffer_size, flags | (coherent ? 0 : GL_MAP_FLUSH_EXPLICIT_BIT)));
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} else {
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glBufferData(gl_target, buffer_size, nullptr, GL_STREAM_DRAW);
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glBufferData(gl_target, allocate_size, nullptr, GL_STREAM_DRAW);
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}
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}
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