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PiperOrigin-RevId: 481210917
This commit is contained in:
Camillo Lugaresi 2022-10-14 12:46:21 -07:00 committed by Copybara-Service
parent e283c10970
commit 364b8e8106
1 changed files with 17 additions and 8 deletions
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25
mediapipe/gpu/gl_texture_buffer.cc
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@ -144,14 +144,23 @@ bool GlTextureBuffer::CreateInternal(const void* data, int alignment) {
context](std::shared_ptr<GlSyncPoint> sync_token) {
CHECK_NE(name_, 0);
GLuint name_to_delete = name_;
context->RunWithoutWaiting([name_to_delete, sync_token]() {
if (sync_token) {
// TODO: maybe we do not actually have to wait for the
// consumer sync here. Check docs.
sync_token->WaitOnGpu();
} else {
LOG_FIRST_N(WARNING, 5) << "unexpected null sync in deletion_callback";
}
context->RunWithoutWaiting([name_to_delete]() {
// Note that we do not wait for consumers to be done before deleting the
// texture. Based on a reading of the GLES 3.0 spec, appendix D:
// - when a texture is deleted, it is _not_ automatically unbound from
// bind points in other contexts;
// - when a texture is deleted, its name becomes immediately invalid, but
// the actual object is not deleted until it is no longer in use, i.e.
// attached to a container object or bound to a context;
// - deleting an object is not an operation that changes its contents;
// - within each context, commands are executed sequentially, so it seems
// like an unbind that follows a command that reads a texture should not
// take effect until the GPU has actually finished executing the
// previous commands.
// The final point is the least explicit in the docs, but it is implied by
// normal single-context behavior. E.g. if you do bind, delete, render,
// unbind, the object is not deleted until the unbind, and it waits for
// the render to finish.
DLOG_IF(ERROR, !glIsTexture(name_to_delete))
<< "Deleting invalid texture id: " << name_to_delete;
glDeleteTextures(1, &name_to_delete);