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[HACK] AMD workaround

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This commit is contained in:
wwylele 2018-04-25 12:55:49 +03:00
parent ede0d15fec
commit 6985b13439
1 changed files with 11 additions and 2 deletions
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13
src/video_core/renderer_opengl/gl_stream_buffer.cpp
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@ -14,16 +14,25 @@ OGLStreamBuffer::OGLStreamBuffer(GLenum target, GLsizeiptr size, bool prefer_coh
gl_buffer.Create(); gl_buffer.Create();
glBindBuffer(gl_target, gl_buffer.handle); glBindBuffer(gl_target, gl_buffer.handle);
GLsizeiptr allocate_size = size;
if (target == GL_ARRAY_BUFFER) {
// On AMD GPU there is a strange crash in indexed drawing. The crash happens when the buffer
// read position is near the end and the crash looks like an out-of-bound access. Doubling
// the allocation size for the vertex buffer seems to avoid the crash.
// TODO (wwylele): investigate what actually happens here.
allocate_size *= 2;
}
if (GLAD_GL_ARB_buffer_storage) { if (GLAD_GL_ARB_buffer_storage) {
persistent = true; persistent = true;
coherent = prefer_coherent; coherent = prefer_coherent;
GLbitfield flags = GLbitfield flags =
GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | (coherent ? GL_MAP_COHERENT_BIT : 0); GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | (coherent ? GL_MAP_COHERENT_BIT : 0);
glBufferStorage(gl_target, buffer_size, nullptr, flags); glBufferStorage(gl_target, allocate_size, nullptr, flags);
mapped_ptr = static_cast<u8*>(glMapBufferRange( mapped_ptr = static_cast<u8*>(glMapBufferRange(
gl_target, 0, buffer_size, flags | (coherent ? 0 : GL_MAP_FLUSH_EXPLICIT_BIT))); gl_target, 0, buffer_size, flags | (coherent ? 0 : GL_MAP_FLUSH_EXPLICIT_BIT)));
} else { } else {
glBufferData(gl_target, buffer_size, nullptr, GL_STREAM_DRAW); glBufferData(gl_target, allocate_size, nullptr, GL_STREAM_DRAW);
} }
} }